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Transportadora de Gas del Sur
TGS
#3366
Rank
$4.49 B
Marketcap
๐Ÿ‡ฆ๐Ÿ‡ท Argentina
Country
$29.85
Share price
-1.42%
Change (1 day)
3.11%
Change (1 year)
๐Ÿ›ข Oil&Gas โšก Energy๐Ÿ›ฃ๏ธ Infrastructure
Categories
  1. Transportadora de Gas del Sur
  2. Annual Reports (20-F)
  3. Submitted on 2026-04-22

Transportadora de Gas del Sur - 20-F annual report


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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 20-F
(Mark One)

☐
REGISTRATION STATEMENT PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended: December 31, 2025

OR

☐
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from __________ to __________.
OR

☐
SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report __________.

Commission file number: 1-13.396
TRANSPORTADORA DE GAS DEL SUR S.A.
(Exact name of Registrant as specified in its charter)

GAS TRANSPORTER OF THE SOUTH INC.
(Translation of Registrant’s name into English)

Republic of Argentina
(Jurisdiction of incorporation or organization)

Cecilia Grierson 355
26th Floor
C1107CPG City of Buenos Aires
Argentina
(Address of principal executive offices)

Leandro Pérez Castaño
(54-11)-4371-5100
inversores@tgs.com.ar

Cecilia Grierson 355
26th Floor
C1107CPG City of Buenos Aires
 
Argentina
(Name, telephone, email and/or facsimile number and Address of Company contact person)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

Title of each class
Trading Symbol(s)
Name of each exchange on which registered
American Depositary Shares (“ADS”), representing Class B Shares
TGS
New York Stock Exchange
Class B Shares, par value Ps.1.00 per share
N/A
New York Stock Exchange*

*Not for trading, but only in connection with the registration of American Depositary Shares related to the issuer’s American Depositary Receipts (“ADRs”) program, pursuant to the requirements of the Securities and Exchange Commission.

Securities registered or to be registered pursuant to Section 12(g) of the Act:
None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:
None

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report:

Class A Shares, par value Ps.1.00 each
  
405,192,594
 
Class B Shares, par value Ps.1.00 each
  
347,568,464
 
Total
  
752,761,058
 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes
☐
No
☒

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

Yes
☐
No
☒

Indicate by check mark whether the registrant has filed (1) all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes
☒
No
☐

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes
☒
No
☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b–2 of the Securities Exchange Act of 1934.

Large accelerated filer
☒
 
Accelerated filer
☐
  Non-accelerated filer ☐


 


 
 Emerging growth
company
 ☐

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Securities Exchange Act of 1934. ☐

†The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.  ☒ 

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.  ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b)  ☐

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

U.S. GAAP
☐
International Financial Reporting Standards as issued by the International Accounting Standards Board
☒
Other
☐
 
If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

Item 17
☐
Item 18
☐

If this is an Annual Report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities Exchange Act of 1934).

Yes
☐
No
☒

TABLE OF CONTENTS

Presentation of Financial and Other Information
i
Cautionary Statement Regarding Forward-Looking Statements
v
Part I
1
 
Item 1.
Identity of Directors, Senior Management and Advisers
1
 
Item 2.
Offer Statistics and Expected Timetable
1
 
Item 3.
Key Information
1
 
Item 4.
Our Information
49
 
Item 4A.
Unresolved Staff Comments
104
 
Item 5.
Operating and Financial Review and Prospects
104
 
Item 6.
Directors, Senior Management and Employees
138
 
Item 7.
Major Shareholders and Related Party Transactions
154
 
Item 8.
Financial Information
159
 
Item 9.
The Offer and Listing
164
 
Item 10.
Additional Information
167
 
Item 11.
Quantitative and Qualitative Disclosures About Market Risk
199
 
Item 12.
Description of Securities Other than Equity Securities
200
Part II
201
 
Item 13.
Defaults, Dividend Arrearages and Delinquencies
201
 
Item 14.
Material Modifications to the Rights of Security Holders and Use of Proceeds
201
 
Item 15.
Controls and Procedures.
201
 
Item 16.
[Reserved]
202
 
Item 16A.
Audit Committee Financial Expert
202
 
Item 16B.
Code of Ethics
202
 
Item 16C.
Principal Accountant Fees and Services
202
 
Item 16D.
Exemptions from the Listing Standards for Audit Committees
203
 
Item 16E.
Purchases of Registered Equity Securities of the Issuer by the Issuer and Affiliated Purchasers
203
 
Item 16F.
Change in Registrant’s Certifying Accountant
203
 
Item 16G.
Corporate Governance
203
 
Item 16H.
Mine Safety Disclosure
205
 
Item 16I.
Disclosure Regarding Foreign Jurisdictions that Prevent Inspection
205
 
Item 16J.
Insider Trading Policies
205
 
Item 16K.
Cybersecurity
206
Part III
206
 
Item 17.
Financial Statements
207
 
Item 18.
Financial Statements
207
 
Item 19.
Exhibits
207
PRESENTATION OF FINANCIAL AND OTHER INFORMATION
Certain Defined Terms
In this annual report on Form 20-F (“Annual Report”), unless otherwise indicated or the context requires otherwise: (i) references to “we,” “us,” “our” and the “Company” mean Transportadora de Gas del Sur S.A. (“tgs”) and its consolidated subsidiaries, Telcosur S.A. (“Telcosur”), (ii) references to Argentina are to the Republic of Argentina, (iii) references to the United States or U.S. are to the United States of America, (iv) references to “pesos” or “Ps.” are to Argentine pesos, the legal currency of Argentina, (v) references to “U.S. dollars,” “dollars” or “US$” are to United States dollars, the legal currency of the United States, (vi) a “billion” is a thousand million, (vii) references to “cf” are to cubic feet, (viii) references to “MMcf” are to millions of cubic feet, (ix) references to “Bcf” are to billions of cubic feet, (x) references to “m3” are to cubic meters, (xi) references to “d” are to days, and (xii) references to “HP” are to horsepower.
Financial Statements and Basis of Preparation
We maintain our financial books and records and publish our consolidated Financial Statements (as defined below) in pesos, which is our functional currency. This Annual Report includes our audited consolidated statements of financial position as of December 31, 2025 and 2024, and our audited consolidated statements of comprehensive income, changes in equity and cash flows, and the related explanatory notes for the years ended December 31, 2025, 2024 and 2023 (“Financial Statements”). Our Financial Statements have been prepared in accordance with IFRS Accounting Standards as issued by the International Accounting Standards Board (“IFRS Accounting Standards”), and as in effect on the date of preparation of the Financial Statements. IFRS Accounting Standards have been adopted by the Argentine Federation of Professional Councils of Economic Sciences (Federación Argentina de Consejos Profesionales de Ciencias Económicas) (“FACPCE”) as its professional accounting standards and are required to be adopted by certain public companies in Argentina (entidades incluidas en el régimen de oferta pública de la Ley de Mercado de Capitales) pursuant to the rules of the Argentine Securities Commission (Comisión Nacional de Valores) (“CNV”), compiled under General Resolution No. 622/2013 (as amended by General Resolution No. 668/2016 and as further amended, the “CNV Rules”).
At our shareholders’ meeting held on April 26, 2017, as a result of a proposal by our controlling shareholder, Compañía de Inversiones de Energía S.A. (“CIESA”), our shareholders voted in favor of having a joint audit on our consolidated financial statements commencing with fiscal year ended December 31, 2017, even though there is currently no legal requirement in Argentina for a joint audit. As a result, our Financial Statements were jointly audited by Price Waterhouse & Co. S.R.L., Buenos Aires, Argentina (“PwC”), member firm of PricewaterhouseCoopers International Limited, and Pistrelli, Henry Martin y Asociados S.A. (“EY”), member firm of Ernst & Young Global Limited. The joint report of PwC and EY dated April 22, 2026, is included elsewhere in this Annual Report. Each of PwC and EY is an independent registered public accounting firm, as stated in the joint report appearing herein.
International Accounting Standard 29 titled “Financial Reporting in Hyperinflationary Economies” (“IAS 29”) requires that the financial statements of an entity whose functional currency is one of a hyperinflationary economy be expressed in terms of the current unit of measurement at the closing date of the reporting period, regardless of whether such financial statements are based on the historical cost method or the current cost method. This requirement also comprises the restatement of comparative information of the financial statements to be presented in the current currency as of December 31, 2025, without modifying the statutory decisions made based on the financial information corresponding to those fiscal years.
i
IAS 29 describes characteristics that may indicate that an economy is hyperinflationary. However, it states that it is a matter of judgement by management when restatement of financial statements becomes necessary. Among other factors, an economy is “hyperinflationary” in accordance with IAS 29 when it has a cumulative inflation rate over three years that approaches, or exceeds, 100%, also taking into consideration other qualitative factors related to the macroeconomic environment.
The IASB does not identify specific economies that satisfy the requirements to be deemed hyperinflationary. The International Practices Task Force (“IPTF”) of the Center for Audit Quality monitors the status of “highly inflationary” countries. The criteria of IPTF for identifying such countries are similar to those for identifying “hyperinflationary economies” under IAS 29. From time to time, the IPTF issues reports of its discussions with the staff of the Securities and Exchange Commission (“SEC”) on the IPTF’s recommendations of which countries should be considered highly inflationary, and which countries are on the IPTF’s inflation “watch list.” The IPTF’s discussion document for its November 6, 2025 meeting states that, in the view of the IPTF, Argentina had a three-year cumulative inflation rate exceeding 100%.
Argentina experienced significant inflation during the years ended December 31, 2023, 2024, and 2025, resulting in a cumulative inflation rate in excess of 100% for each of the three-year periods ending on those respective dates. In addition, the rest of the indicators do not contradict the conclusion that Argentina should be considered a hyperinflationary economy for accounting purposes. As a result, our management considers that there is sufficient evidence to conclude that Argentina is a hyperinflationary economy in terms of IAS 29, effective as from July 1, 2018.
The Financial Statements and the other financial information included in this Annual Report for all the periods reported are presented on the basis of constant pesos as of December 31, 2025 (“Current Currency”). Thus, our audited consolidated statements of financial position as of December 31, 2024, and our audited consolidated statements of comprehensive income, changes in equity and cash flows, and the related explanatory notes for each of the years ended December 31, 2024 and 2023, included elsewhere in this Annual Report have been restated in accordance with IAS 29 for comparative purposes from the original figures reported and supersede any previously disclosed consolidated financial statements relating to such periods.
In analyzing the provisions of IAS 29, our management used the inflation rates stated in the official statistics published by the National Institute of Statistics and Censuses (Instituto Nacional de Estadística y Censos) (“INDEC”), similar to the criteria adopted by the accounting profession and corporate regulatory bodies in Argentina. In order to restate the financial statements referred in the immediately preceding paragraph, the CNV has established that the series of indexes to be used for the application of IAS 29 is determined by the FACPCE. This series of indexes combines the National Consumer Price Index (“CPI”) as of January 2021 (base month December 2020) with the Domestic Wholesale Price Index (“WPI”), both published by INDEC until that date. According to information from FACPCE, inflation was 31.5%, 117.8% and 211.4% in the years ended December 31, 2025, 2024 and 2023, respectively.
For more information, see note 4(d) to the Financial Statements and “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Factors Affecting Our Consolidated Results of Operations.” Also, see “Item 3. Key Information—D. Risk Factors—Risks Relating to Argentina—High levels of inflation could negatively affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.”
ii
Currency
Solely for the convenience of the reader, certain amounts presented in pesos in this Annual Report as of and for the year ended December 31, 2025, have been converted into U.S. dollars at specified exchange rates. Unless otherwise specified, all exchange rate information contained in this Annual Report has been derived from information published by Banco de la Nación Argentina (“Banco Nación”) on December 31, 2025, without any independent verification by us. As a result of fluctuations in the peso/U.S. dollar exchange rate, the exchange rate at such date may not be indicative of current or future exchange rates. Such fluctuations may affect the U.S. dollar equivalent of peso amounts included in this Annual Report. Consequently, these translations should not be construed as a representation that the peso amounts represent, or have been, or could be converted, into, U.S. dollars at that or any other rate.
Fluctuations in the exchange rate between pesos and U.S. dollars would affect the U.S. dollar equivalent of the peso price of our Class B shares, par value Ps. 1 each ( “Class B Shares”), on the Buenos Aires Stock Exchange (Bolsas y Mercados Argentinos) (“BYMA”) and, as a result, the market price of our American Depositary Shares (“ADSs”) on the New York Stock Exchange (“NYSE”) as well.
Historically, Argentina has been subject to several restrictions imposed on the foreign exchange market. In the recent years, the Central Bank of the Republic of Argentina (Banco Central de la República Argentina) (“BCRA” or “Central Bank”) issued several communications which introduced several changes to the then existing foreign exchange control regime. For additional information, see “Item 10. Additional Information—D. Exchange Controls.”
The following table sets forth, for the periods indicated, high, low, average and period-end exchange rates between the peso and the U.S. dollar, as reported by Banco Nación. The Federal Reserve Bank of New York does not publish a buying rate for the peso. The average rate is calculated by using the average of Banco Nación reported exchange rates on each day during the relevant monthly period and on the last day of each month during the relevant annual period.
  
Pesos per U.S. dollar
 
  
High
  
Low
  
Average
  
Period end
 
Most recent six months:
            
December 2025
  
1,457.00
   
1,435.00
   
1,447.58
   
1,455.00
 
January 2026
  
1,475.00
   
1,429.50
   
1,448.95
   
1,447.00
 
February 2026
  
1,451.00
   
1,370.50
   
1,408.39
   
1,397.00
 
March 2026
  
1,416.00
   
1,368.00
   
1,395.95
   
1,382.00
 
April 2026 (until 21st)
  1,394.00

  1,354.00

  
1,374.62

  1,394.00

                 
Year ended December 31,
                
2021
  
102.72
   
84.70
   
95.16
   
102.72
 
2022
  
177.16
   
103.00
   
130.81
   
177.16
 
2023
  
808.45
   
178.15
   
295.30
   
808.45
 
2024
  
1,032.00
   
810.70
   
898.05
   
1,032.00
 
2025
  
1,492.00
   
1,032.50
   
1,245.02
   
1,455.00
 
iii
Our results of operations and financial condition are highly sensitive to changes in the peso-U.S. dollar exchange rate because a significant portion of our revenues (48% of our total consolidated revenues from sales for the year ended December 31, 2025), most of our capital expenditures, almost all of our debt obligations and the cost of natural gas used in our Liquids (as defined below) business are denominated in U.S. dollars, but substantially all of our assets are located in Argentina, and our functional currency is the peso.
Currency fluctuations would also affect the U.S. dollar amounts received by holders of our ADSs upon conversion by us or by Citibank N.A. (“Depositary”), pursuant to the deposit agreement for the issuance of the ADSs entered into between the Depositary and us (“Deposit Agreement”) of the cash dividends paid in pesos on the underlying Class B Shares.
Rounding
Certain figures included in this Annual Report have been rounded for ease of presentation. Percentage figures included in this Annual Report have not, in all cases, been calculated on the basis of such rounded figures but on the basis of such amounts prior to rounding. For this reason, percentage amounts in this Annual Report may vary from those obtained by performing the same calculations using the figures in our Financial Statements. Certain numerical figures shown as totals in some tables may not be an arithmetic aggregation of the figures that preceded them due to rounding.
Available Information
The SEC maintains a website (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. Our telephone number is (+54-11) 4371-5100, and our principal executive offices are located at Cecilia Grierson 355, 26th Floor, C1107CPG, City of Buenos Aires, Argentina. Our website is www.tgs.com.ar. This URL is intended to be an inactive textual reference only. It is not intended to be an active hyperlink to our website. The information included in our website or which may be accessed through our website is not part of this Annual Report, is not incorporated by reference herein or otherwise and should not be relied upon in determining whether to make an investment in any securities issued by us.
iv
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS
Some of the information in this Annual Report, including information incorporated by reference herein, may constitute estimates and forward-looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933 (“Securities Act”) and Section 21E of the U.S. Securities Exchange Act of 1934, as amended (“Exchange Act”). These estimates and forward-looking statements can be identified by the use of forward-looking terminology such as “anticipate,” “believe,” “can,” “continue,” “estimate,” “expect,” “goal,” “intend,” “may,” “plan,” “potential,” “predict,” “projection,” “should,” “will,” “will likely result,” “would” or other similar words. These estimates and statements appear in a number of places in this Annual Report and include statements regarding our intent, belief or current expectations, and those of our officers, with respect to (among other things) our business, financial condition and results of operations. Although we believe that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to several risks and uncertainties and are based on information available to us as of the date of this Annual Report.
When considering forward-looking statements, you should keep in mind the factors described in “Item 3. Key Information—D. Risk Factors” and other cautionary statements appearing in “Operating and Financial Review and Prospects.”
These factors and statements, as well as other statements contained herein, describe circumstances that could cause actual results to differ materially from those expressed in or implied by any forward-looking statement.
Forward-looking statements include, but are not limited to, the following:

•
statements regarding changes in general economic, business, political or other conditions in Argentina and globally, including changes from actions taken by the Argentine government (“Government”) and changes due to natural and human-induced disasters, and the impact of the foregoing;

•
estimates relating to future energy demand (including demand for fossil fuels), tariffs and volumes for our natural gas transportation services and future prices and volumes for our natural gas liquid products such as propane and butane (also referred to as liquid petroleum gas or “LPG”), ethane and natural gasoline (collectively, “Liquids”) and for products and services provided in the Midstream and other services (“Midstream”) business segment;

•
statements regarding expected future political developments in Argentina and expected future developments regarding the license granted to us by Government to provide natural gas transportation services through the exclusive use of the southern natural gas transportation system in Argentina (“License”), the renegotiation process of the License with the Government, including primarily, the adoption of a revised scheme of tariffs, regulatory actions by the National Gas Regulatory Body (Ente Nacional Regulador del Gas) (“ENARGAS”) and other agencies of the Government, the legal framework established by the Argentine Ministry of Economy (“Ministry of Economy”), formerly known as the Federal Energy Bureau, and any other applicable governmental authority that may affect us and our business;

•
labor risks and uncertainties and statements with respect to our employees in Argentina;

•
statements and estimates regarding future pipeline expansion and other projects and the cost of, or return to us from, any such expansion or projects;
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 		•
estimates of our future level of capital expenditures and delays in such capital expenditures, including those required by ENARGAS or other governmental authorities for the expansion of our pipeline system or other purposes;

•
estimates of unscheduled and unexpected expenditures for the repair and maintenance of our fixed or capital assets

•
statements regarding the ability of companies engaged in the upstream business in the region where we operate to identify drilling locations and prospects for future drilling opportunities, and drill and develop such locations (such as the Vaca Muerta formation), as well as the Government’s regulations and policies affecting such companies and projects; and

•
the risk factors discussed under “Item 3. Key Information—D. Risk Factors.”
When considering forward-looking statements, you should keep in mind the factors described under the section entitled “Item 3. Key Information—D. Risk Factors” in this Annual Report. These factors, as well as other statements contained herein, describe circumstances that could cause actual results to differ materially from any results projected, forecasted, estimated or budgeted by us in our forward-looking statements or otherwise expressed in or implied by any forward-looking statement. The risks and uncertainties we face going forward which could affect the accuracy of these forward-looking statements include, but are not limited to:

•
risks and uncertainties resulting from Government regulations that affected or may affect our business or financial condition or results of operations, such as the prohibition on tariff increases related to our natural gas transportation segment and/or restrictions on payments abroad and exchange controls;

•
risks and uncertainties arising from general economic, business, political, or other conditions in Argentina and globally, as well as business disruptions due to natural or man-made disasters, such as weather conditions, earthquakes, terrorist activities, social unrest and violence, armed conflicts, and health epidemics;

•
risks and uncertainties related to changes in the U.S. dollar-peso exchange rate and the Argentine domestic inflation rate, which may materially adversely affect our revenues, expenses and reported financial results;

•
risk and uncertainties related to high rates of inflation;

•
risks and uncertainties associated with our non-regulated business, including those related to international and local prices of Liquids, taxes, cost and restrictions on the supply of natural gas and other restrictions imposed on Liquids exports, our ability to renegotiate our agreements with customers and possible increased Government regulation of the Liquids industry;

•
capital expenditures effectively required by ENARGAS or other governmental authorities for the expansion of our pipeline system or other purposes, including the risk that we may be forced to make investments or take other actions that are not profitable or are not as commercially attractive as other actions;

•
risks and uncertainties associated with unscheduled and unexpected expenditures for the repair and maintenance of our fixed or capital assets;
vi

 		•
risks and uncertainties resulting from the prospect of additional Government regulation or other Government involvement in our business;

•
developments in legal and administrative proceedings involving us and our affiliates;

•
changes to, or revocation or expiration of our License or the related regulatory framework; and

•
risks and uncertainties impacting us as a whole, including changes in general economic conditions, changes in Argentine laws and regulations to which we are subject, including tax, environmental and employment laws and regulations, and the cost and effects of legal and administrative claims and proceedings against us.
Estimates and forward-looking statements speak only as of the date of this Annual Report and we do not undertake any obligation to update any forward-looking statement or other information contained in this Annual Report to reflect events or circumstances occurring after the date of this Annual Report or to reflect the occurrence of unanticipated events. Additional factors affecting our business emerge from time to time and it is not possible for us to predict all of those factors, nor can we assess the impact of all such factors on our business, operations or financial condition, or the extent to which any factors, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statement. Estimates and forward-looking statements involve risks and uncertainties and do not guarantee future performance, as actual results or developments may be substantially different from the expectations described in the forward-looking statements. In light of the risks and uncertainties described above, the events referred to in the estimates and forward-looking statements included in this Annual Report may or may not occur, and our business performance, financial condition and results of operations may differ materially from those expressed in our estimates and forward-looking statements, due to factors that include but are not limited to those mentioned above. Investors are warned not to place undue reliance on any estimates or forward-looking statements in making any investment decision.
vii
PART I
Item 1.
Identity of Directors, Senior Management and Advisers
Not applicable.
Item 2.
Offer Statistics and Expected Timetable
Not applicable.
Item 3.
Key Information
A. [Reserved]
B. Capitalization and Indebtedness
Not applicable.
C. Reasons for the Offer and Use of Proceeds
Not applicable.
D. Risk Factors
You should carefully consider the following risks and uncertainties, and any other information appearing elsewhere in this Annual Report. The risks and uncertainties described below are intended to highlight risks and uncertainties that are specific to us. Additional risks and uncertainties, including those generally affecting Argentina and the industry in which we operate, risks and uncertainties that we currently consider immaterial or risks and uncertainties generally applicable to similar companies in Argentina may also impair our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
The information in this Risk Factors section includes forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of numerous factors, including those described in “Cautionary Statement Regarding Forward-Looking Statements” above.
The following summarizes some, but not all, of the risks provided below. The following summary of material risk factors could materially and adversely affect our business, financial condition and results of operation, and our ability to meet our financial obligations. Consequently, such risk factors may cause historical results to differ materially from any results projected, forecasted, estimated or budgeted by us in our forward-looking statements. Please carefully consider all of the information discussed in this “Item 3. Key Information—D. Risk Factors” in this Annual Report for a more thorough description of these and other risks:

•
Risks Relating to Our Business

‒
Failure or delay in the implementation of tariff increases could have a material adverse effect on our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.

‒
Our operations are subject to extensive regulation.
1

 		‒
Failure to maintain our relationships with labor unions may have an adverse effect on our business, financial condition, results of operations and prospects.

‒
Our regulated business is dependent on our ability to maintain our License, which is subject to revocation under specific circumstances.

‒
Our creditors may not be able to enforce their claims against us in Argentina.

‒
The Government’s strategies, measures, and programs with respect to the natural gas transportation industry could materially adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations

‒
A significant portion of our revenues is generated under natural gas transportation contracts that must be renegotiated and/or extended periodically.

‒
Our business may require substantial capital expenditures for ongoing maintenance requirements and the expansion of our installed gas transportation capacity, and we may be unable to make such expenditures due to the lack of financing.

‒
Our Liquids production depends on the natural gas that arrives at the our liquids processing plant located at General Cerri Complex, in the Province of Buenos Aires (“Cerri Complex”) through three main pipelines from the Neuquina, Austral and San Jorge natural gas basins. The flow and heating value of this natural gas are subject to risks that could materially adversely affect our Liquids and midstream business segment.

‒
Measures taken by the Government may have an adverse effect on the supply of natural gas to the Cerri Complex and on the margins we are able to obtain from our Liquids business, which may adversely affect the results of our Liquids Production and Commercialization segment and, as a result, our overall business and results of operations.

‒
Fluctuations in market prices and the enactment of new taxes or regulations limiting the sales price of LPG and natural gasoline may adversely affect our Liquids business.

‒
Our ethane sales depend on the capacity of PBB Polisur S.R.L. (“PBB”), as the sole purchaser of our ethane production.

‒
Measures taken by the Government may have an adverse effect on the flow of natural gas through our midstream (gathering and treatment) facilities, which may adversely affect the results in our midstream business.

‒
The affirmative and restrictive covenants in our currently outstanding indebtedness could adversely restrict our financial and operating flexibility and subject us to other risks.

‒
Our insurance policies may not fully cover damage or we may not be able to obtain insurance against certain risks.

‒
Changes in the interpretation by the courts of labor laws that tend to favor employees could adversely affect our business, results operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
2

 		‒
We may be exposed to risks related to litigation and administrative proceedings that could materially and adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations in the event of an unfavorable ruling.

‒
Our operations are subject to environmental, occupational health and safety regulations.

‒
Our operations could give rise to environmental risks and any change in environmental laws could increase our operating costs.

‒
We may face competition.

‒
Downgrades in our credit ratings could have negative effects on our funding costs and business operations.

‒
Our business has become dependent on digital technologies to conduct day-to-day operations and we may be subject to cyberattacks or other risks related to new technologies.

‒
Our natural gas transportation systems, gas gathering and treatment and processing facilities are subject to the risk of mechanical or electrical failures and any resulting unavailability may affect our ability to fulfill our contractual and other commitments and thus adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.

‒
Our business is subject to risks arising from natural disasters, catastrophic accidents and terrorist attacks.

‒
We are subject to anti-trust, anti-corruption, anti-bribery and anti-money laundering laws. Failure to comply with these laws could result in penalties, which could harm our reputation and have an adverse effect on our business.

‒
Our ability to operate our business may suffer if we are unable to retain our employees or attract other skilled employees or contractors.

‒
Climate change could adversely affect our operating results, access to capital and strategy.

‒
Our activities are subject to social and reputational risks, including the potential for protests by members of local communities.

‒
The failure of any bank in which we deposit our funds could have an adverse effect on our financial condition.

•
Risks Relating to Argentina

‒
Argentina’s ability to obtain financing from international markets could be limited, which may impair its ability to implement reforms and foster economic growth and, consequently, affect our business, results of our operations and growth prospects.

‒
Argentina’s fiscal situation could limit Argentina’s access to the capital market and adversely affect the Argentine economy.
3

 		‒
Certain risks inherent to any investment in a company operating in an emerging market such as Argentina.

‒
Economic volatility in Argentina has adversely affected and may continue to adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.

‒
The ongoing political instability in Argentina may adversely affect the Argentine economy.

‒
The impact of the economic measures adopted or to be adopted by the Government may affect the Argentine’s economy.

‒
High levels of inflation could negatively affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.

‒
Restrictions on transfers of foreign currency and the repatriation of capital from Argentina may impair our ability to pay dividends or imports and investors may face restrictions on their ability collect capital and interest payments in connection with corporate bonds issued by Argentine companies.

‒
Fluctuations in the value of the peso may also adversely affect the Argentine economy, our financial condition and results of operations.

‒
The impossibility of addressing the actual and potential risks of institutional deterioration and corruption, the economy and the financial situation of Argentina has been affected negatively and could continue to be.

‒
Government intervention in the Argentine economy could adversely affect our business, results of operations, financial condition, the value of our securities, and our ability to meet our financial obligations.

‒
Argentina’s economy may be adversely affected by economic developments in other markets, which could have a material adverse effect on Argentina’s economic growth.

‒
Argentina’s past default and litigation with holdout bondholders may limit our ability to access international markets.

‒
A sustained deterioration in the terms of trade given a decline in the global prices for Argentina’s main commodity exports or an increase in the global prices for Argentina’s main commodity imports, as well as adverse weather conditions affecting the production of Argentina’s main commodity exports, could have an adverse effect on Argentina’s economic growth.

‒
Downgrades in the credit rating or rating outlook of Argentina could impact the rating of our securities or adversely affect the market price of our securities.

‒
The Government may mandate salary increases for private sector employees, which would increase our operating costs.

‒
Argentine corporations may be restricted from making payments in foreign currencies or from importing certain products.
4

 		‒
The conflict between Russia and Ukraine and between Israel and Iran could adversely affect the global economy, the Argentine economy and our operational results and financial condition.

‒
We continue operating in a period of economic uncertainty and capital markets disruption, which has been significantly impacted by geopolitical instability.

•
Risks Relating to Our Shares and ADSs

‒
shareholders outside Argentina may face additional investment risk from currency exchange rate fluctuations in connection with their holding of our shares or ADSs represented by ADRs. Exchange controls imposed by the Government may limit our ability to make payments to the Depositary in U.S. dollars, and thereby limit ADR holders’ ability to receive cash dividends in U.S. dollars.

‒
Our principal shareholders exercise significant control over matters affecting us, and may have interests that differ from those of our other shareholders.

‒
Sales of a substantial number of shares could decrease the market prices of our shares and the ADRs.

‒
Under Argentine law, shareholder rights may be fewer or less well defined than in other jurisdictions.

‒
As a foreign private issuer we are exempt from certain rules that apply to domestic U.S. issuers.

‒
Changes in Argentine tax laws may adversely affect the tax treatment of our Class B Shares or ADSs.

‒
Holders of ADRs may be unable to exercise voting rights with respect to our Class B Shares underlying the ADRs at our shareholders’ meetings.

‒
Holders of ADRs may be unable to exercise preemptive, accretion or other rights with respect to the Class B Shares underlying the ADSs.

‒
The NYSE and/or BYMA may suspend trading and/or delist our ADSs and common shares, respectively, upon occurrence of certain events relating to our financial situation.

‒
The price of our Class B Shares and the ADSs may fluctuate substantially, and your investment may decline in value.

‒
The relative volatility and illiquidity of the Argentine securities markets may substantially limit the ability to sell the Class B Shares underlying the ADSs on the BYMA at the price and time desired by the shareholder.
Risks Relating to Our Business
Failure or delay in the implementation of tariff increases could have a material adverse effect on our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
All our net revenues from the Natural Gas Transportation public service (which represented 41% of total revenues during 2025) are attributable to contracts, which are subject to Government regulation. As a result, our ability to generate revenues and maintain adequate operating margins depends significantly on the timely approval and implementation of tariff adjustments by the Argentine regulatory authorities.
5
Prior to the enactment of the Public Emergency Law and Foreign Exchange System Reform Law No. 25,561 (“Public Emergency Law”), our tariffs were denominated in U.S. dollars and adjusted semiannually based on the U.S. Producer Price Index (“PPI”), with additional adjustments every five years reflecting efficiency gains and investment commitments. The Public Emergency Law, however, eliminated tariff indexation, and public service tariffs were converted into pesos and fixed at an exchange rate of Ps. 1.00 per US$1.00, even though the peso was devaluating significantly against the U.S. dollar.
As a result, from 2002 until recent years, our natural gas transportation tariffs did not increase in line with inflation or other macroeconomic variables affecting our operating costs. This mismatch adversely affected our revenues and financial condition. Although we implemented cost-containment measures to mitigate the impact of insufficient tariff adjustments, and such measures did not impair the reliability or safety of our pipeline system, there can be no assurance that similar actions would be sufficient in the future.
From the effective date of the Public Emergency Law until April 2014, our tariff remained unchanged. In April, 2014 we received a transitory tariff increase of 20%, much lower than the evolution of other macroeconomic variables that affect our operating costs.
Subsequently, and until the execution of the integral tariff renegotiation (Revisión Tarifaria Integral) (“RTI”) agreement approved in March 2017 through Resolution No. 4362/2017 (“Resolution 4362”), we were granted only partial and limited increases.
Resolution 4362 approved a staged tariff increase, providing for an aggregate transportation tariff increase of 214.2% and an aggregate access and use charge (“CAU”) increase of 37%. Pursuant to this resolution, we had to execute a capital expenditures program for a five-year period (from April 1, 2017, to March 31, 2022), which contemplated investments of Ps. 6,786 million (in nominal value as of December 31, 2016) to improve the operation and maintenance of the pipeline system.
Subsequently, under the Decree No. 1020 tariffs were frozen until the new RTI concludes. In this context, only two transitory-tariff increases were approved, which have particularly compensated the development of the operation costs. “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Tariff situation.”
Following the public hearing held on January 8, 2024, on March 26, 2024, we entered into the a transitional agreement with ENARGAS (“2024 Transitional Agreement”), which establishes a temporary adjustment of 675% in natural gas transportation tariffs. This tariff increase came into effect on April 3, 2024, following the publication in the Official Gazette of Resolution No. 112/2024 (the “Resolution 112”) issued by ENARGAS. According to Resolution 112, from May 2024 until the five-year tariff review process is completed, tariffs will be adjusted monthly. However, pursuant to instructions by the Ministry of Economy, the implementation and determination of monthly adjustments were deferred to and subsequently defined by the Executive Branch.
In relation with the five-year tariff review, on January 14, 2025, ENARGAS published the call for a public hearing held on February 6, 2025 to consider, among other matters, the five‑year tariff review for gas transportation and the methodology for periodic tariff adjustments.
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ENARGAS approved our five‑year tariff review through Resolution No. 256/2025. The approval of the periodic adjustment mechanism was deferred following intervention by the Executive Branch. Subsequent regulatory measures modified the adjustment framework and introduced monthly tariff updates based on indexes determined by ENARGAS. We consented to such framework and ENARGAS approved the applicable calculation methodology. For additional information, see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Tariff situation.”
Historically, delays in the approval or implementation of tariff increases, as well as tariff adjustments that were insufficient to offset inflation and rising operating costs, have adversely affected our financial and economic condition. We cannot assure that future tariff adjustments will be approved in a timely manner, will be sufficient to maintain our operating margins, or will adequately reflect increases in costs or required investments.
As of the date of this Annual Report, we are unable to predict whether permanent measures by the Government on the tariff regime of natural gas transportation services will be adopted, whether such regime will be amended, nor the final outcome of the ongoing five-year tariff review. In addition, we cannot predict whether we will be subject to additional operating restrictions nor mandatory investment requirements. Any adverse outcome on these matters could have a material adverse effect on our business, results of operations and financial condition.
Our operations are subject to extensive regulation.
The Argentine oil and gas industry is subject to extensive government regulation and control. As a result, our business is to a large extent dependent upon regulatory and political conditions prevailing in Argentina and our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations may be adversely affected by regulatory and political changes in Argentina. Therefore, we face risks and challenges relating to government regulation and control of the energy sector, including those set forth below and elsewhere in these risk factors:

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limitations on our ability to increase prices or to reflect the effects of higher domestic taxes, increases in operating costs or increases in international prices of natural gas and other hydrocarbon fuels and exchange rate fluctuations on our domestic prices;

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risks in connection with the former and current incentive programs established by the Government for the oil and gas industry, such as the natural gas additional injection stimulus program and cash collection of balances with the Government;

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legislation and regulatory initiatives relating to hydraulic stimulation and other drilling activities for non-conventional oil and gas hydrocarbons, which could increase our cost of doing business or cause delays and adversely affect our operations; and

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the implementation or imposition of stricter quality requirements for hydrocarbon products in Argentina.
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In recent years, the Government has made certain changes in regulations and policies governing the energy sector to give absolute priority to domestic supply at stable prices in order to sustain economic recovery. As a result of these changes, for example, on days during which a gas shortage occurs, exports of natural gas (which are also affected by other governmental curtailment orders) and the provision of gas supplies to industries, electricity generation plants and service stations selling compressed natural gas are interrupted to prioritize residential consumers at lower prices. The Argentine Expropriation Law has declared the achievement of self-sufficiency in the supply of hydrocarbons, as well as in the exploitation, industrialization, transportation and sale of hydrocarbons, is in the national public interest and a priority for Argentina. In addition, its stated goal is to guarantee socially equitable economic development, the creation of jobs, the increase of the competitiveness of various economic sectors and the equitable and sustainable growth of the Argentine provinces and regions. We cannot assure you that these and other changes in applicable laws and regulations, or adverse judicial or administrative interpretations of such laws and regulations, will not adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Failure to maintain our relationships with labor unions may have an adverse effect on our business, financial condition, results of operations and prospects.
A significant portion of our workforce is represented by labor unions, and most of our non-unionized employees have the same employment benefits as unionized employees. While we believe we have enjoyed satisfactory relationships with all the labor organizations that represent our associates, and we believe our relationships with labor organizations will continue to be satisfactory, labor-related disputes may still arise. Labor lawsuits are common in the energy sector in Argentina, and industry-wide organized actions by unionized employees in the industry, such as blockages in the access to facilities and route cuts have occurred in the past. We have suffered interruptions as a result of our employees joining such organized activities. We cannot assure you that future business interruptions resulting from strikes and other organized activities by our employees would not have a significant adverse effect on our business, financial condition, results of operations and prospects.
The collective bargaining agreements with our unions are valid for one year. Currently, we have a collective bargaining agreement in effect for the period from April 2025 to April 2026.
However, we cannot assure you that we will not suffer business interruptions or strikes in the future as a result of collective actions by our employees. We have insurance that covers terrorism and organized actions against our assets, among other items, for a total insured amount of US$50,000,000 with a deductible per event of US$500,000, but we cannot assure you that our insurance coverage will be sufficient to cover damages and losses caused by the organized actions of our employees.
In addition, in the past, the Government has enacted laws and regulations forcing private companies to maintain certain wage levels and to provide additional benefits to their employees. We cannot assure you that in the future the Government will not increase wages or require additional benefits for workers or employees or that unions will not pressure the Government to demand such measures. All wage increases, as well as any additional benefits, could result in increased costs and adversely affect our results of operations.
Our regulated business is dependent on our ability to maintain our License, which is subject to expiration under specific circumstances.
We conduct our Natural Gas Transportation business pursuant to the License, which authorizes us to provide natural gas transportation services through the exclusive use of the southern natural gas transportation system in Argentina. Our License may be revoked in specific circumstances based on the recommendation of ENARGAS. Expiration of our license would require an administrative proceeding, which would be subject to judicial review. Main reasons for which our License may be revoked include:
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repeated failure to comply with the obligations of our License and failure to remedy a significant breach of an obligation in accordance with specified procedures;

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total or partial interruption of service for reasons attributable to us that affects transportation capacity during the periods stipulated in our License;

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sale, assignment or transfer of our essential assets or the placing of encumbrances thereon without ENARGAS’ prior authorization, unless such encumbrances serve to finance extensions and improvements to the gas pipeline system;

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our bankruptcy, dissolution or liquidation;

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cessation and abandonment of the provision of the licensed service, an attempt to assign or unilaterally transfer our License in full or in part without the prior authorization of ENARGAS, or relinquishing our License, other than in the cases permitted therein; and

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delegation of the functions granted in such License without the prior authorization of ENARGAS, or the termination of such License without regulatory approval of a license.
On September 8, 2023, we submitted a request to ENARGAS to initiate the procedure established by Law No. 24,076 for the extension of our License terms. Following applicable technical, legal and administrative procedures, ENARGAS issued a technical and legal report on June 19, 2024 stating we had complied with our obligations under the License. After a non‑binding public hearing held on October 21, 2024, and based on ENARGAS’ assessment, the Executive Branch considered the extension of the License.
On July 24, 2025, the Executive Branch ratified the memorandum of agreement entered into between us and the Ministry of Economy on July 11, 2025, and pursuant to which the term of our License was extended for an additional period of 20 years as from December 28, 2027.
Notwithstanding the extension of our License, our regulated activities remain subject to ongoing supervision, evaluation and enforcement by ENARGAS and other governmental authorities. Compliance with evolving regulatory standards, technical requirements and performance obligations is required throughout the term of the License, and such standards or requirements may be amended or interpreted differently over time. Failure to comply with applicable regulations or License obligations could result in sanction, operational restrictions, or, in extreme cases, the initiation of revocation proceedings.
If our License were revoked, we would be required to cease providing natural gas transportation services. The impact that loosing our License would have on our business, financial condition and results of operations would be material and adverse. Additionally, certain changes to the License could result in a default under our outstanding debt instruments.
Our creditors may not be able to enforce their claims against us in Argentina.
We are a stock corporation with limited liability (sociedad anónima), incorporated and organized under the laws of Argentina. Substantially all of our assets are located in Argentina.
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Under Argentine law, foreign judgments may be enforced by Argentine courts, provided that the requirements of Articles 517 through 519 of the Federal Code of Civil and Commercial Procedure are met. Foreign judgments cannot violate principles of public policy (orden público) of Argentine law, as determined by Argentine courts. It is possible that an Argentine court would deem the enforcement of foreign judgments ordering us to make a payment in a foreign currency outside of Argentina to be contrary to Argentine public policy if at that time there are legal restrictions prohibiting Argentine debtors from transferring foreign currency outside of Argentina. Although currently there are no legal restrictions prohibiting Argentine debtors from transferring foreign currency outside of Argentina to satisfy principal or interest payments on outstanding debt that has been previously reported to the BCRA, we cannot assure you that the Government or an Argentine court will not impose such restrictions in the future.
In addition, under Argentine law, attachment prior to execution and attachment in aid of execution will not be ordered by an Argentine court with respect to property located in Argentina and determined by such courts to be utilized for the provision of essential public services. A significant portion of our assets may be considered by Argentine courts to be dedicated to the provision of an essential public service. If an Argentine court were to make such a determination with respect to any of our assets, unless the Government ordered the release of such assets, such assets would not be subject to attachment, execution, or other legal process if such determination stands, and the ability of any of our creditors to realize a judgment against such assets may be adversely affected.
The Government’s strategies, measures, and programs with respect to the natural gas transportation industry could materially adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Since 1992 and after the privatization of several state companies, until the economic crisis in 2002, the Government reduced its control over the natural gas transportation industry. After the economic crisis in 2002 the Government increased its role in the energy sector implementing strict regulations and increasing its intervention. Intervention primarily included the expansion of our pipeline through the creation of trust funds and the interruption and redirection of natural gas firm transportation services, including the diversification of natural gas supply from the Cerri Complex.
In the past, natural gas distribution companies, including us, were prohibited from passing through price increases to consumers. Producers of natural gas, therefore, had difficulty implementing wellhead natural gas price adjustments that would increase the costs of distribution companies, which caused such producers to suffer a sharp decline in their rate of return-on-investment activities. As a result, natural gas production was not sufficient to meet the increasing demand. Likewise, the lack or insufficient tariff adjustments for natural gas transportation companies caused a decrease in the profitability of such companies.
The Government attempted to encourage investment by subsidizing energy consumption, but these measures proved ineffective. They led to stagnation in the energy sector, including in the reduction in the production of natural gas, the commercialization of propane and butane in the local market and the natural gas industry, while consumption continued to rise. The energy crisis resulted in a scarcity scenario. The Government’s response was to increase energy imports, which had adverse effects on the trade balance and the international reserves of the BCRA. These measures severely impacted in our operations and the operations of our main clients.
By Decree of Necessity and Urgency No. 55/2023 of December 18, 2023, the President declared the national emergency of the energy sector. The emergency period ran until December 31, 2024, subsequently extended until July 9, 2025. Decree No. 1023/2024 stipulates that the implementation of the tariff schedules resulting from the tariff review initiated pursuant to Decree No. 55/23 shall not exceed July 9, 2025. The state of emergency was further extended to July 9, 2026, by Decree 370/2025.
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The Secretary of Energy is instructed to prepare and implement a program of actions that will allow the sanctioning of prices in competition and free access, maintain income levels, cover investment needs and guarantee the continuous provision of public services, in adequate technical and economic conditions, both for providers and users.
Although the current administration has implemented measures to deregulate the economy and the energy market, we cannot guarantee that these measures will resolve issues in energy sector in in Argentina. Likewise, at this time we cannot predict the impact of the measures or strategies implemented or to be implemented by the Government in the natural gas or hydrocarbons industry, nor their effect, on our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
Additionally, there is no assurance that the Argentine Government will not introduce further emergency legislation or similar regulations in the future that could increase our obligations, such as higher taxes, unfavorable changes to our tariff structures or remuneration schemes, and other regulatory requirements. Compliance with these could raise our costs, negatively affect our operational results, and decrease the market value of our ADSs and common shares.
A significant portion of our revenues is generated under natural gas transportation contracts that must be renegotiated and/or extended periodically.
In 2025, 74.2% of our average daily natural gas deliveries were made under long-term firm transportation contracts. As of December 31, 2025, our long-term firm natural gas transportation contracts had a remaining weighted average life of approximately 11 years. We cannot assure you that we will be able to extend or replace these contracts when they expire or that the terms of any renegotiated contracts will be as favorable as the existing contracts. In particular, our ability to extend and/or replace contracts could be adversely affected by factors we cannot control, including:

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Argentine natural gas transportation regulations;

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timing, volume and location of new market demand;

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competition from alternative energy sources;

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supply and price of natural gas, mainly in the Austral basin and San Jorge Gulf basin that show sustained declines, in Argentina;

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demand for natural gas in the markets we serve; and

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availability and competitiveness of alternative gas transportation infrastructure in the markets we serve.
Additionally, most of our transportation contracts include a clause allowing for the termination of the relevant contract before the expiration of its term by any of the parties, in case of (i) breach of the other party, or (ii) an extended event of force majeure.
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Our business may require substantial capital expenditures for ongoing maintenance requirements and the expansion of our installed gas transportation capacity, and we may be unable to make such expenditures due to the lack of financing.
The natural gas transportation service is an activity involving significant amounts of capital expenditures to improve the operation and maintenance of the pipeline system. Incremental capital expenditures may be required to fund maintenance of our pipeline system. Furthermore, capital expenditures will be required to finance current and future expansions of our transportation capacity. If we are unable to finance any such capital expenditures in terms satisfactory to us or at all, our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations may be adversely affected. In addition, our financing ability may be limited by market restrictions on financing availability for Argentine companies. See “—Risks Relating to Argentina—Argentina’s past default and litigation with holdout bondholders may limit our ability to access international markets.”
Within the framework of the five-year tariff review, we presented our investment plan for the 2025-2029 five-year period, detailing the projects to be executed and the corresponding budget. We must submit to ENARGAS the progress of our investment plan on an annual basis, and may face administrative sanctions if we fail to comply with such plan.
We cannot guarantee that we will have the necessary resources to comply with the proposed investment plan. Failure to comply could result in the implementation of administrative sanctions, fines, or even the revocation of the License, all of which could have a substantial adverse effect on our business, operations and financial situation.
In the past, expansion projects by the Government have not had adverse effects over our results of operations and financial condition. However, we cannot assure you that future expansion projects will not adversely affect our business.
Our Liquids production depends on the natural gas that arrives at the Cerri Complex through three main pipelines from the Neuquina, Austral and San Jorge natural gas basins. The flow and heating value of this natural gas are subject to risks that could materially adversely affect our Liquids and midstream business segment.
More than 50% of the energy matrix in Argentina relies on natural gas. However, and until the surge of the Vaca Muerta area, its natural gas reserves have been declining. Indeed, the exploitation of the Vaca Muerta unconventional area represents a key factor for Argentina’s hydrocarbon development. In the event that it is not successful, it is possible that natural gas production may decline again in the future, which would adversely affect our Liquids business segment by reducing the amount of natural gas flowing to the Cerri Complex and, therefore, the amount of Liquids we produce. In addition, the reduction in the production of natural gas could affect the flow of natural gas provided for our midstream services.
The possibility that Argentina’s natural gas reserves will increase depends on the results of exploration by natural gas producers and the construction of a pipeline system that allows natural gas to escape from the Neuquén basin. In this regard, in November 2020, the Government established the Plan Gas.Ar and extended it through Decree No. 730/2022 until 2028. This plan establishes the need to guarantee the supply of natural gas demand while establishing incentives to make immediate investments for the maintenance and/or growth of production in the productive basins, where natural gas producers must commit to achieve a production curve that guarantees the maintenance and/or increase of current levels.
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In recent years, investment in natural gas transportation infrastructure has not kept pace with the development of new natural gas production, particularly in connection with the evacuation of incremental volumes from producing basins. While this investment gap could be partially reversed if certain infrastructure projects currently under development or under evaluation in Argentina are completed, there can be no assurance that such projects will be executed on a timely basis, or at all. If natural gas demand continues to increase, as it has in recent years, and the required transportation and evacuation infrastructure is not expanded accordingly, there is a risk that natural gas supply constraints could arise during periods of peak demand.
Through Resolution No. 67/22 of February 7, 2022, the Secretariat of Energy created the program Transport.Ar Producción Nacional, declaring of national public interest the construction of the Perito Moreno pipeline (“GPM,” formerly known as the President Néstor Kirchner pipeline) and its complementary works as a strategic project. This gas pipeline connects the town of Tratayén, Province of Neuquén, with the city of Salliqueló, Province of Buenos Aires. The GPM and compressor plants, owned by Energía Argentina S.A. (“ENARSA”), became fully operational in October 2024.
Notwithstanding the commissioning of the GPM, additional infrastructure investments may be required to fully accommodate future increases in natural gas production and demand. We cannot assure you, however, that this new natural gas resource at the Neuquén Basin, or the Plan Gas.Ar, or any other measures taken by the Government to increase natural gas production and supply, will be successful in increasing Argentine natural gas reserves or production and, if unsuccessful, our midstream or Liquids Production and Commercialization businesses could be adversely affected.
Measures taken by the Government may have an adverse effect on the margins we are able to obtain from our Liquids business, which may adversely affect the results in our Liquids Production and Commercialization segment and, as a result, our overall business and results of operations.
Historically, due to regulatory, economic and government policy factors, domestic prices of gasoline, diesel, natural gas, propane and butane, and other fuel prices in Argentina have differed substantially from prevailing international and regional market prices. At various times, our ability to increase prices in response to international prices or increases in local costs, including those resulting from the peso devaluation, has been limited. This limitation has adversely affected the profitability of our Liquids business and the economic feasibility and timing of investments in processing capacity and related infrastructure. Further, we may face risks and challenges relating to government regulation and control of the energy sector, including laws, regulations and rules enacted by federal, provincial and local governments.
Although our Liquids production and commercialization activities are not regulated by ENARGAS, the Argentine government has historically intervened in the LPG market to prioritize domestic supply at stable or reduced prices. For example, in April 2005, the Government enacted Law No. 26,020, which set the framework by which the Secretary of Hydrocarbon Resources may establish regulations to cause LPG suppliers to guarantee sufficient supply of LPG in the domestic market at low prices. Law No. 26,020 creates a price regime pursuant to which the Secretary of Hydrocarbon Resources periodically publishes reference prices for LPG sold in the local market. It also sets forth LPG volumes to be sold in the local market.
Within this framework, we have participated in government programs providing compensation based on the difference between government‑determined domestic prices and export parity prices. In the past, such compensations have been paid with significant delays, which adversely affected our liquidity and results of operations. For further information, see “Item 4—Our Information—B. Business Overview—Liquids Production and Commercialization.”
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During 2024, the administration of President Javier Milei introduced changes to the propane and butane supply programs with the aim of liberalizing prices and aligning them with international reference prices. While these measures have improved pricing conditions for our Liquids business, we cannot assure you that this regulatory approach will be maintained over time. The Government retains broad authority to intervene in the energy sector, and future measures could reintroduce price controls, supply obligations, export restrictions and other limitations affecting domestic LPG pricing.
Accordingly, we cannot assure you that domestic propane and butane prices will continue to reflect international or regional market conditions, or that we will be able to maintain or increase margins in our Liquids business. Any reintroduction of price controls, delays in compensation mechanisms, or other adverse regulatory changes could materially and adversely affect our business, results of operations, financial condition, cash flows, the value of our securities and our ability to meet our financial obligations.
Fluctuations in market prices and the enactment of new taxes or regulations limiting the sales price of LPG and natural gasoline may adversely affect our Liquids business.
We extract LPG and natural gasoline from natural gas delivered to the Cerri Complex and sell LPG and natural gasoline. As a result of the deterioration of our Natural Gas Transportation segment, operations relating to our Liquids production and commercialization have represented a material portion of our total revenues.
Over the last few years, the price of Liquids has experienced high levels of volatility. Factors affecting prices include weak demand levels from emerging markets, significant variations in production and storage levels, and climate and geopolitical issues such as the Russia-Ukraine and Middle East conflicts, the ability of the Organization of the Petroleum Exporting Countries (“OPEC”) and other crude oil producing nations to set and maintain crude oil production levels and prices; macroeconomic conditions, including inflation and increase in interest rates. It is expected that volatility and fluctuations maintained in the future.
We cannot predict how these factors will influence LPG and natural gasoline prices and we have no control over them. Price volatility curtails the ability of industry participants to adopt long-term investment decisions given that returns on investments become unpredictable. A substantial or extended downturn in the international prices of Liquids could have a material adverse effect on our business, operating results, and financial condition, as well as the market value of our shares or ADSs.
In the past, the Government has imposed duties on exports, including exports of natural gasoline and LPG products that we export. Currently, in accordance with the Solidarity Law and the Decree No. 488/2020 export duties on the Liquids products that we exported are about 8%. For further information, see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”
In addition, after the issuance of Resolutions Nos. 1,982/11 and 1,991/11 (“Gas Charge Resolutions”), the natural gas processing charge created by Decree No. 2,067/08 increased from Ps. 0.049 to Ps. 0.405 per cubic meter of natural gas effective as from December 1, 2011, representing a significant increase in our variable costs of natural gas processing.
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In order to avoid an adverse effect on our Liquids business, we initiated legal proceedings against Decree No. 2,067/08 and the Gas Charge Resolutions, including the Government, ENARGAS and the former Ministry of Production and Federal Planning, Public Investment and Services (Ministerio de Producción y de Planificación Federal, Inversión Pública y Servicios) as defendants. For additional information, see “Item 8. Financial Information—A. Consolidated Statements and Other Financial Information—Legal and Regulatory Proceedings—Tax Claims.”
The effect of the continuing decline or volatility in international prices of LPG or natural gasoline could cause our operating margins to drop significantly and materially adversely affect our business, results of operations, financial condition, the value of our securities, and our ability to meet our financial obligations. In addition, the national, provincial and municipal governments could modify the current taxes and export/import regulations in a manner that could adversely affect our financial condition and results of operations.
Our ethane sales depend on the capacity of PBB, as the sole purchaser of our ethane production.
We sell all our ethane to PBB pursuant to an agreement effective as of May 1, 2018, that expires on December 27, 2027.
Pursuant to this agreement, the ethane price is calculated in U.S. dollars and is subject to adjustments, the natural gas price, the quality of the ethane shipped by us and transportation tariffs and charges, among others. This agreement also includes take or pay (“TOP”) and deliver or pay (“DOP”) commitments for minimum annual quantities. Under these terms, if one party does not comply with the applicable TOP or DOP condition, that party will be required to compensate the other party.
In the past, PBB suffered several adverse operational conditions that affected its capacity to purchase our ethane production. We cannot assure you that these adverse conditions affecting PBB will not recur in the future or that PBB will be able to satisfy its obligations under the new purchase agreement. Likewise, if we are not able to renegotiate such agreement at maturity on terms similar to those in effect, our financial condition and results of operations could be adversely affected.
Measures taken by the Government may have an adverse effect on the flow of natural gas through our midstream (gathering and treatment) facilities, which may adversely affect the results in our midstream business.
To stimulate the natural gas production in Argentina, former Argentina administration implemented the Plan Gas.Ar under which certain market quotas (a portion of total gas needs for power generation and for distribution companies) were assigned to natural gas producers on different tender processes following a price basis criterion. As there is not a full price through of natural gas prices to final consumers, the Plan Gas.Ar provides state funding to close the gap between the prices quoted by the natural gas producers and the prices resulting from the pass through to final consumers. The agreements resulting from the Plan Gas.Ar are valid until year 2028.
Plan Gas.Ar has been successful in providing the natural gas producers with price signals that allow them to invest in their upstream operations and, consequently, increase the local natural gas production.
Any change to this plan unilaterally imposed by the Argentina government to the natural gas producers or default in payments by the Government, may affect negatively in the flow of natural gas through our Midstream infrastructure, impacting adversely in our results of operations and the development of future investment plans that we may have in our Vaca Muerta facilities.
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The affirmative and restrictive covenants in outstanding indebtedness could adversely restrict our financial and operating flexibility and subject us to other risks.
The terms of our outstanding indebtedness provide for numerous affirmative and restrictive covenants that limit our ability to, among other things:

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incur or permit to exist certain liens;

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incur additional indebtedness;

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pay dividends or make other restricted payments;

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make capital investments and other investments;

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enter into sale and lease-back transactions;

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enter into transactions with affiliates;

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sell, transfer or otherwise dispose of assets; and

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consolidate, amalgamate, merge or sell all or substantially all of our assets.
These restrictions may limit our ability to operate our businesses and may prohibit or limit our ability to enhance our operations or take advantage of potential business opportunities as they arise. The breach of any of these covenants by us or the failure by us to meet any of these conditions could result in a default under any or all of such indebtedness. Our ability to comply with these covenants may be affected by events beyond our control, including prevailing economic, financial and industry conditions and the renegotiation of the public works and licenses process. In addition, if we are unable to generate sufficient cash flow from operations, we may be required to refinance outstanding debt or to obtain additional financing. We cannot assure you that a refinancing would be possible or that any additional financing would be available or obtained on acceptable terms.
Our insurance policies may not fully cover damage or we may not be able to obtain insurance against certain risks.
We maintain insurance policies intended to mitigate our losses due to customary risks. These policies cover our assets against loss for physical damage and loss of revenue, and also third-party liability. However, we cannot assure you that the scope of damages suffered in the event of a natural disaster or catastrophic event would not exceed the policy limits of our insurance coverage. We maintain all-risk physical damage coverage for losses resulting from, but not limited to, earthquakes, fire, explosions, floods, windstorms, strikes, riots, mechanical breakdowns and business interruption. Our level of insurance may not be sufficient to fully cover all losses that may arise in the course of our business or insurance covering our various risks may not continue to be available in the future. In addition, we may not be able to obtain insurance on comparable terms in the future. We may be materially and adversely affected if we incur losses that are not fully covered by our insurance policies or if we are required to disburse significant amounts from our own funds to cover such losses.
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Changes in the interpretation by the courts of labor laws that tend to favor employees could adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
In addition to our employees, we rely on several third-party service providers to outsource certain services. We follow very strict policies to control the compliance by such third-party service providers with their labor and social security obligations. However, due to changes in the interpretation by the courts of labor laws that tend to favor employees in Argentina, companies’ labor and social security obligations toward their own employees and employees of third-party service providers have significantly increased. As a result of the foregoing, potential severance payment liabilities have significantly increased, and in the event any third-party service provider fails to duly comply with its labor and social security obligations towards its employees, we may be faced with litigation by employees of such third-party service provider to hold us liable for the payment of any labor and social security obligations defaulted on by any such third-party service provider. Therefore, our labor costs may increase as our indemnification responsibilities and costs expand, adversely affecting the results of our operations.
In addition, recent legislative reforms aimed at modernizing Argentina’s labor framework, including changes to employment regimes, collective bargaining rules and employer liabilities, may be subject to regulatory implementation, judicial interpretation or reversal, which could generate uncertainty, transitional costs or labor disputes.
We may be exposed to risks related to litigation and administrative proceedings that could materially and adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations in the event of an unfavorable ruling.
We are part of administrative proceedings and judicial claims, some of which have been pending resolution for several years. Our business may expose us to litigation relating to labor, environmental, health and safety matters, regulatory, tax and administrative proceedings, governmental investigations, tort claims and contract disputes and criminal prosecution, among other matters. In the context of these proceedings, we may be required to pay fines or money damages and we also may be subject to complementary sanctions or injunctions affecting our ability to continue our operations. While we may contest these matters vigorously and make insurance claims when appropriate, litigation and other proceedings are inherently costly and unpredictable, making it difficult to estimate accurately the outcome of actual or potential litigation or proceedings. Although we may establish provisions, as we deem necessary, the amounts that we reserve could vary significantly from any amounts we pay due to the inherent uncertainties in the estimation process.
For additional information on the material proceedings in which we are involved, see “Item 8. Financial Information—A. Consolidated Statements and Other Financial Information—Legal and Regulatory Proceedings.”
Our operations are subject to environmental, occupational health and safety regulations.
We operate an extensive network of natural gas pipelines, including numerous compressor plants, the Cerri Complex and the logistic and storage facilities of Puerto Galván. All these facilities are located throughout the territory of Argentina and are subject to federal and provincial laws, as well as to the supervision of governmental agencies and regulatory authorities in charge of enforcing environmental laws and policies. We operate in compliance with applicable laws and in accordance with directives issued by ENARGAS. For this reason, it is possible that we could be subject to controls, which could result in penalties imposed on us.
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We utilize a certified safety, occupational health, environment and quality management system in accordance with international standards ISO 14001, ISO 9001 and OHSAS 18001. It includes operational controls that are documented and monitored regularly. However, we cannot assure you that these controls will be effective or that our time of response to incidents will be adequate.
In addition, future regulation may require us to comply with additional safety, occupational health, environmental and quality controls or standards. We cannot assure you that, in the future, additional regulation could be issued requiring us to make new investments in order to comply with such safety, health and environmental laws and regulations.
Our operations could give rise to environmental risks and any change in environmental laws could increase our operating costs.
Some of our operations are subject to environmental risks that could arise unexpectedly and cause material adverse effects on our operational results and financial condition. In addition, the occurrence of any of these risks could lead to personal injury, loss of life, environmental damage, repair and expenses, equipment damage and liability in civil, criminal and administrative proceedings. We cannot assure you that we will not incur additional costs related to environmental issues in the future, which could adversely affect our operational results and financial condition. In addition, we cannot ensure that our insurance coverage is sufficient to cover the losses that could potentially arise from these environmental risks.
Moreover, we are subject to a broad range of environmental legislation, both in Argentina and in other countries where companies we have interests in are located.
Local, provincial and national authorities in Argentina and other countries where companies we have interests in are located may implement new environmental laws and regulations and may require us to incur higher costs to comply with new standards. The imposition of more stringent regulatory and permit requirements in relation to our operations in Argentina could significantly increase the costs of our activity. We cannot predict the effects of the implementation of any new environmental laws and regulations on our financial condition and operational results.
We may face competition.
We face competition in both our Liquids Production and Commercialization segment and our Midstream and natural gas transportation activities, which could adversely affect our volumes, margins and results of operations.
In our Liquids business, the development and operation of natural gas processing facilities upstream of our Cerri Complex, particularly in the Province of Neuquén, has historically increased competition by enabling producers and third parties to satisfy demand through alternative processing arrangements. Although the construction of such facilities requires significant capital investment, additional upstream processing capacity could reduce the volumes or affect the quality of the natural gas delivered to the Cerri Complex. As a result, increased upstream processing, including at existing facilities such as the MEGA plant or at new projects that may be developed in the future, could adversely affect our revenues from Liquids Production and Commercialization services.
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Regarding our Midstream business segment, we operate in a competitive environment with strong market participants, many of which may have extensive and diversified know-how or operating experience and financial resources like or significantly greater than ours. While it is still unclear the future measures to be taken by the Government regarding its energetic policy, the development of the natural gas industry in Argentina is essential for the country’s economic growth. All future business that our competitors or we can develop will depend on the production of natural gas. The Government (or any other entity on its behalf) might not issue the necessary regulations to encourage natural gas producers to develop new projects involving natural gas output.
Our competitors may be able to invest more for productive natural gas properties than our financial or personnel resources permit. Our competitors may also be able to offer better compensation packages to attract and retain qualified personnel than we are able to offer.
As a result of the above, an increased number of competitors could reduce the quality of the natural gas available for its processing, our ability to attract and retain quality personnel or raising additional capital. In addition, an increase in competition could affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations. This would adversely affect our business, results of operations and financial condition.
Additionally, our principal competitor in the natural gas transportation business is Transportadora de Gas del Norte S.A. (“TGN”). We compete with TGN on a day-to-day basis for natural gas interruptible transportation services and from time to time for new natural gas firm transportation services and, in case that opportunities for new firm natural gas transportation services that arise from the expansion of the system. We compete directly with TGN for the transportation of natural gas from the Neuquén Basin to the greater Buenos Aires area. In addition, in the future other participants may successfully penetrate our market and connect with our main customers which could affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
The development of natural gas production in Argentina, including in the Vaca Muerta formation, depends heavily on the availability of transportation infrastructure. While recent expansions have increased transportation capacity, key pipelines continue to operate near their maximum capacity. If natural gas production grows faster than transportation capacity is expanded, constraints on available capacity could intensify competition among transporters and limit the development of new business opportunities, potentially affecting our revenues and margins. For additional information see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Expansions of the System.”
The construction of a new pipeline or to increase the transportation capacity by a third party could affect our results of operations as the interruptible natural gas transport volumes and the availability of natural gas that arrives at the Cerri Complex for processing could be diminished. Any of the foregoing factors could have a material adverse effect on our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Downgrades in our credit ratings could have negative effects on our funding costs and business operations.
Credit ratings are assigned to the Company and its subsidiaries. The credit ratings are based on information furnished by us or obtained by the credit rating agencies from independent sources and are also influenced by the credit ratings of Argentine Government bonds and general views regarding the Argentine financial system as a whole. The credit ratings are subject to revision, suspension or withdrawal by the credit rating agencies at any time. A downgrade, suspension or withdrawal in our credit ratings could result in, among others, the following: (i) increased funding costs and other difficulties in raising funds; (ii) the need to provide additional collateral in connection with financial market transactions; and (iii) the termination or cancellation of existing agreements. As a result, our business, financial condition and operational results could be materially and adversely affected.
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Our business has become dependent on digital technologies to conduct day-to-day operations and we may be subject to cyberattacks or other risks related to new technologies.
We depend on a variety of internet-based data processing, communication, and information exchange platforms and networks. Although we have extended our security policy to cover industrial systems, reinforcing our defenses in case of denial of service and increasing the monitoring of suspicious activities, our technologies, systems and networks and those of our business associates may be exposed to cyberattacks and other cybersecurity incidents in the normal course of business, which could lead to disruptions in critical systems (such as our electronic flow measurement system and distributed control systems), the unauthorized release of confidential or protected information, corruption of data or other disruptions of our business operations.
Information security risks have generally increased in recent years as a result of the proliferation of new technologies and the increased sophistication and activities of cyber-attacks. We extended remote work environments which may be less secure and more susceptible to hacking attacks, including phishing and social engineering attempts.
Our information technology infrastructure is critical to the efficient operation of our business and is essential to our ability to perform day-to-day operations. Breaches in our information technology infrastructure or physical facilities, or unauthorized access or other loss of information or other disruptions, could result in damage to our assets, safety incidents, legal claims, potential liability or the loss of contracts, damage our reputation, and could have a material adverse effect on our operations, financial position and results of operations.
During the first quarter of 2022, we were the subject of a cybersecurity attack, which had no adverse material effect on the administrative infrastructure and resulted from operations. This meant that we strengthened security controls to limit potential similar incidents. However, there is no guarantee that we will not be subject to any cyber-attack that could adversely affect the business and outcome of operations.
Our natural gas transportation systems and processing facilities are subject to the risk of mechanical or electrical failures and any resulting unavailability may affect our ability to fulfill our contractual and other commitments and thus adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
Our natural gas transportation systems and processing facilities are at risk of mechanical or electrical failures and may experience periods of unavailability affecting our ability to comply with our contracts with customers. Any unplanned unavailability of our natural gas transportation systems and processing facilities may adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations, as we may be subject to fines or penalties under our contracts with customers.
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Our business is subject to risks arising from natural disasters, catastrophic accidents and terrorist attacks.
Our facilities or the third-party infrastructure that we rely on may be damaged by flooding, fires and other catastrophic disasters arising from natural or accidental or intentional human causes. We could experience severe business disruptions, significant decreases in revenues based on lower demand as a result of catastrophic events, or significant additional costs to us not otherwise covered by business interruption insurance clauses. There may be a significant time lag between a major accident, catastrophic event or terrorist attack and our definitive recovery from our insurance policies, which typically carry nonrecoverable deductible amounts, and in any event are subject to caps per event. In addition, any of these events could adversely affect the demand of natural gas by some of our customers and of consumers generally in the affected market. Some of these considerations, among others, could materially and adversely affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
On March 7, 2025, heavy rains fell on the city of Bahía Blanca and adjacent areas, causing floods in all the urban areas and surrounding areas (“Event”). The Event caused the overflowing of the Saladillo García stream, which flooded the Cerri Complex and consequently paralyzed liquids production and partially affected natural gas transportation service. The external electric distribution system, as well as the electric generation and distribution facilities of the facility, were impacted. We carried out cleanup efforts and prioritized getting the plant back to full operation. Currently, the Cerri Complex is operating under normal conditions.
We have coverage for property damage and business interruption, which is subject to the terms and conditions of insurance policies and applicable sublimits. The property damage deductible amounts to US$1 million, while the business interruption coverage includes a 60-day waiting period for the Liquids Production and Commercialization segment.
We are subject to anti-trust, sanctions, anti-bribery and anti-money laundering laws. Failure to comply with these laws could result in penalties, which could harm our reputation and have an adverse effect on our business.
We are subject to anti-trust, sanctions, anti-bribery and anti-money laundering laws. Although we maintain policies and processes intended to comply with these laws, including a review of our internal control over financial reporting, we cannot ensure that these compliance policies and processes will prevent intentional, reckless or negligent acts committed by our officers or employees. If our officers or employees fail to comply with any applicable anti-trust, anti-corruption, anti-bribery or anti-money laundering laws, they may be subject to criminal, administrative or civil penalties and other remedial measures, which could have material adverse effects on our business, financial condition, results of operations and prospects.
On March 1st, 2018, Law No. 27,401 entered into force (“Law 27,401”). Law 27,401 modifies the Argentine Criminal Code (“ACC”) and imposes criminal liability to private legal persons, whose corporate capital is either national or foreign, with or without state ownership. The Law 27,401 imposes criminal liability to legal persons for the following crimes: (i) local or international bribery and influence peddling (section 258 and 258 bis of the ACC), (ii) negotiations incompatible with public office (section 265 of the ACC), (iii) extortion by public officers (section 268 of the ACC); (iv) unjust enrichment by public officers and employees (section 268 (1) and (2) of the ACC), and (v) falsification of balance sheets and reports (section 300 bis of the ACC).
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Legal persons are liable for the abovementioned crimes when, either direct or indirectly, the entity intervened in the commission of the crime or when someone acted in his name, interest or benefit for said purpose; even when this individual had no powers to do so, provided that the legal person ratified the act. The legal person will not be criminally liable when the entity reported a crime set forth by the Law 27,401 as a consequence of the entity´s internal detection and investigation; the corporate implementation of a proper system of control and supervision in accordance with the Law 27,401 and prior to the facts under investigation; and after returning the benefit obtained.
In relation to this, the Law 27,401 highlights the importance of “Integrity Programs” or “Internal Rules of Compliance” adopted by the legal person before the commission of the crime, and hence it is important to implement this type of rules into the legal person.
In the framework of Law 27,401 on Criminal Responsibility of Legal Entities, we have implemented an Integrity Program. It should be noted that prior to the enactment of Law 27,401, we already had a Code of Conduct and a Whistleblowing Hotline. It is also important to note that, as we are a publicly traded company, we are subject to the provisions issued by the CNV, as well as the provisions of the General Companies Law and other regulations issued by the competent authorities in the matter. See “Item 16B.Code of Ethics.”
In addition, we are subject to economic sanctions regulations that restrict our dealings with certain sanctioned countries, individuals and entities. In the ordinary course of business, we deal with different suppliers, contractors, vendors and counterparties that may become subject to sanctions. It is possible that existing sanctions regimes may be widened or that new sanctions may be imposed on our counterparties, by the United States, the European Union, the United Kingdom or other jurisdictions. Although we take steps to comply with applicable laws and regulations, should these suppliers, contractors or vendors become sanctioned or the sanctions regime with respect to these entities be widened and we no longer can rely on such suppliers, contractors or vendors, or should we fail to successfully comply with applicable sanctions, we may face negative legal and business consequences.
There can be no assurance that our internal policies and procedures will be sufficient to prevent or detect all inappropriate practices, fraud or violations of law by our affiliates, employees, directors, officers, partners, agents and service providers or that any such persons will not take actions in violation of our policies and procedures. Any violations by us of anti-bribery and anti-corruption laws or sanctions regulations could have a material adverse effect on our reputation, business, financial condition, results of operations and prospects.
Our ability to operate our business may suffer if we are unable to retain our employees or attract other skilled employees or contractors.
Our current and future performance and the operation of our business are dependent upon the contributions of our senior management and our skilled team of engineers and other employees. We depend on our ability to attract, train, motivate and retain key management and specialized personnel with the necessary skills and experience.
There is no guarantee that we will be successful in retaining and attracting key personnel and the replacement of any key personnel could be difficult and time-consuming. The loss of the experience and services of key personnel or the inability to recruit suitable replacements and additional staff could have a material adverse effect on our business, financial condition and results of operations.
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Climate change could adversely affect our operating results, access to capital and strategy.
There is an increased attention on greenhouse gas emissions and climate change from different sectors of society. Argentina agreed the consensus reached in 2015 United Nations Climate Change Conference adopted by consensus the Paris Agreement. The Paris agreement sets a goal to greenhouse gas emission reduction and defined targets to limit global temperature increases. International treaties together with increased public awareness related to climate change may result in increased regulation to reduce or mitigate greenhouse gas emissions. In addition, if we are unable to follow the pace in which society is moving toward energy transition would adversely impact demand for our services, affecting our results of operations and financial condition.
In addition, environmental laws that may be implemented in the future could increase litigation risks and have a material adverse effect on us. For example, in 2019, the Argentine Congress enacted Law No. 27,520 on Minimal Standards on Global Climate Change Adaptation and Mitigation, which focused on implementing policies, strategies, actions, programs and projects that can prevent, mitigate or minimize the damages or impacts associated with climate change.
Compliance with national and local legal and regulatory changes relating to climate change may in the future increase our costs to operate and maintain our facilities, capital expenditures to install new emission and manage any greenhouse gas emissions program may increase our operational expenses. In addition, the effects upon natural gas industry relating to climate change and the resulting regulations and regimes promoting alternative energy resources may also lead to declining demand for natural gas, or Liquids in the long-term.
The physical effects of climate change such as, but not limited to, increases in temperature and sea levels and fluctuations in water levels could also adversely affect our operations and supply chains.
Stakeholder groups are also putting pressure on commercial and investment banks to stop financing fossil fuel companies. According to press reports, some financial institutions have started to limit their exposure to fossil fuel projects. Accordingly, our ability to use financing for these types of future projects may be adversely affected. These factors could have a negative impact on the demand for our products and services and may jeopardize or even impair the implementation and operation of our business, adversely impacting our operating and financial results and limiting our growth opportunities.
Our activities are subject to social and reputational risks, including the potential for protests by members of the local communities.
Although we are committed to maintain good relationships with local communities and to operate our business in a socially responsible manner, we may face opposition from local communities. For example, several of our operations are carried out in the province of Neuquén, Argentina. Local communities, including indigenous communities, often demonstrate in various forms of protest. Such as blocking roads or blocking access, which could indirectly lead to negative impact on commercial activities. Although we consider our relationship with local communities, including indigenous communities to be good, we cannot assure you that any blockade or demands will not impact our operations. These actions could have an adverse effect on our reputation, financial condition and results of operations. Additionally, if any operational incident occurs that affects those communities we will need to incur in additional costs and expenses in order to restore affected areas and compensate for any damages we may cause. These additional costs may have a negative impact on the profitability of the projects we may decide to undertake.
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The failure of any financial institution in which we deposit our funds could have an adverse effect on our financial condition.
We maintain cash deposits in Argentina and other countries, which may face instability that could affect our operations. Particularly, in Argentina, although deposits continue to grow in nominal terms, they are mostly short-term, and medium- and long-term funding sources remain limited.
Financial institutions are highly regulated and subject to frequent regulatory changes, which could create uncertainty and impose significant limitations on their activities. If any of the financial institutions in which we have deposited funds ultimately fails, we may lose our uninsured deposits at such financial institutions, and/or we may be required to move our accounts to another financial institution, which could cause operational difficulties, such as delays in making payments to our partners and employees, which could have an adverse effect on our business, financial condition, results of operations and cash flows.
Disruptions to the capital markets or the banking system may materially adversely affect the value of investments or bank deposits we currently consider safe, liquid or that provide a reasonable return, and we may be unable to find suitable alternative investments. Additionally, exchange controls and restrictions on international transfers and capital inflows limit access to international credit.
Risks Relating to Argentina
We are a stock corporation with limited liability (sociedad anónima) incorporated and organized under the laws of Argentina. Our financial condition and results of operations depend to a significant extent on economic, regulatory and political conditions prevailing in Argentina, the exchange rate between the peso and the U.S. dollar and the reference international prices of Liquids because a significant portion of our revenues (52% of our total consolidated revenues from sales for the year ended December 31, 2025), most of our capital expenditures, all of our debt obligations and the cost of natural gas used in our Liquids business are denominated in U.S. dollars, but substantially all of our assets are located in Argentina, and our functional currency is the peso.
Argentina’s ability to obtain financing from international markets could be limited, which may impair its ability to implement reforms and foster economic growth and, consequently, affect our business, results of our operations and growth prospects.
Argentina has a long history of macroeconomic volatility, sovereign debt restructurings, exchange controls and limited access to international capital markets. As a result, the country has faced recurring periods during which it was effectively excluded from voluntary international financing or was able to access such markets only at considerable high costs. This structural vulnerability has had, and may continue to have, adverse effects on economic growth, investment levels and financial stability.
Following its sovereign default in 2001, Argentina restructured its external debt in 2005 and 2010. Although a significant majority of bondholders participated in those exchanges, litigation with holdout creditors persisted for more than a decade and materially impaired Argentina’s access to international capital markets. Subsequent administrations have faced renewed episodes of financial stress, including debt reprofiling measures, capital controls, currency devaluations and further restructurings, reinforcing investor concerns regarding Argentina’s creditworthiness and policy continuity.
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In recent years, Argentina’s external financing has depended largely on programs with the International Monetary Fund (“IMF”) and other multilateral institutions. These arrangements have provided critical balance‑of‑payments support and enabled Argentina to meet sovereign debt maturities; however, they are subject to strict conditionality, periodic performance reviews and ongoing negotiations. Compliance with fiscal, monetary, exchange rate and structural reform commitments is required to unlock disbursements, and there can be no assurance that Argentina will consistently meet such conditions or that future reviews will be completed on a timely basis.
Despite recent macroeconomic stabilization measures and policy changes implemented by the current administration, Argentina has not yet regained sustained access to international voluntary capital markets. The country continues to face significant challenges, including low levels of international reserves, the gradual dismantling of exchange controls, inflationary pressures, and exposure to adverse external shocks. In addition, Argentina remains subject to material legal contingencies in foreign jurisdictions, including claims arising from the nationalization of YPF S.A. (“YPF”), which could result in significant liabilities and further constrain public finances if resolved unfavourably.
Argentina’s future fiscal situation may not be sufficient to meet its debt service obligations, and the country may be forced to rely partly on additional financing from local and international capital markets, the IMF, or other credit organizations. Furthermore, the agreement with the IMF could be affected. All of this would lead to a worsening of Argentina’s macroeconomic situation and negatively impact or restrict companies’ access to credit.
Argentina’s limited access to external financing may restrict the Government’s ability to implement economic reforms, sustain infrastructure investment, stabilize the financial system or support economic growth. In periods of financial stress, the Government has historically adopted measures such as exchange controls, restrictions on dividend payments, import limitations, price controls and changes in regulatory frameworks, particularly in strategic sectors such as energy. Similar measures could be adopted again in the future.
A deterioration in Argentina’s macroeconomic or financing conditions could negatively affect our business through multiple channels, including reduced energy demand, delays or defaults in customer payments, increased difficulty in accessing foreign currency, constraints on our ability to finance capital expenditures, higher financing costs and reduced access to local or international credit markets. In addition, adverse sovereign developments may increase country risk premiums, limit investor appetite for Argentine issuers and reduce the availability of long‑term financing for companies operating in Argentina.
As of the date of this Annual Report, it is not possible to predict the impact that the measures relating to Argentina’s debt restructuring nor any future economic plan that the Government may implement will have on the Argentine economy. Furthermore, the long-term impact of these measures and any measures future of the current administration in the Argentine economy remains uncertain.
Argentina’s fiscal situation could limit Argentina’s access to the capital market and adversely affect the Argentine economy.
In recent years, the government has substantially increased public spending. In this sense, the Argentine Government adopted several measures to finance this public expenditure and finance the fiscal deficit that they generated, including, among others, the use of the resources of the BCRA and the National Social Security Administration (Administración Nacional de la Seguridad Social) (“ANSES”), and has used the issuance of money as a tool to raise funds. Argentina has a high level of indebtedness, which has been growing in recent years as a result of the increase in the fiscal deficit and the lack of capacity of Argentina to obtain international financing.
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In recent years, however, the fiscal position of the national public sector has improved significantly. For the second consecutive year and following more than a decade of financial deficits, in 2025, the national public sector recorded a financial surplus. The surplus amounted to Ps. 1,453,819 million (approximately 0.2% of the GDP), resulting from a primary surplus of Ps. 11,769,219 million (approximately 1.4% of the GDP). Similarly, in 2024 Argentina achieved both a primary and financial surplus for the first time in approximately 14 years, driven primarily by a sharp reduction in public spending.
These results were achieved through the implementation of a fiscal consolidation program under the current administration, which included significant cuts in primary expenditures, reductions in subsidies (including energy and transportation subsidies), a freeze or reduction in public works spending, the elimination of discretionary transfers to provinces, initiatives to promote private participation in infrastructure projects, and the downsizing of government ministries and administrative structures pursuant to Decree No. 8/2023.
Despite these improvements, the sustainability of the current fiscal position remains uncertain. Future fiscal performance could deteriorate due to a variety of factors, including increased social security expenditures, financial assistance to provinces facing fiscal stress, renewed spending on public works, or higher subsidies in the energy and transportation sectors.
The impact of these and other measures on the future economic and political scenario is uncertain. We cannot predict what effect they will have on our business, financial situation or results of operations.
The application of new measures in the future could also have negative effects. In addition, the federal government’s primary fiscal balance could be adversely affected if public spending increases faster than income in the future. On the other hand, weaker fiscal results than expected in Argentina could have a material adverse effect on the economy of this country.
The Government’s ability to access the long-term financial markets to finance such deficit is limited given the high levels of public sector indebtedness. The inability to access the capital markets to fund its deficit or the use of other sources of financing may have a negative impact on the economy and could limit the access to such capital markets for Argentine companies, which could adversely affect our business, financial condition and results of operations.
Certain risks are inherent in any investment in a company operating in an emerging market such as Argentina.
Argentina is an emerging market economy and investing in emerging markets generally carries risks. According to a statement from MSCI Inc., Argentina was considered an emerging market until June 2021, when it was reclassified as stand-alone market. According to MSCI index countries classified as stand-alone markets are those that are currently partially or fully closed to foreign investors, where stock lending and short selling are activities that are either not developed or completely prohibited, with small capital markets and political tensions.
Risks include political, social and economic instability that may affect Argentina’s economic results, which can stem from many factors. In general, Argentine economic conditions are dependent on a variety of factors, including, but not limited to, the following: (i) domestic production, international demand and prices for Argentina’s principal export commodities, (ii) the competitiveness and efficiency of domestic industries and services, (iii) the stability and competitiveness of the peso against foreign currencies and exchange controls, (iv) high interest and inflation rates, (v) Argentina’s fiscal and trade deficits, (vi) Argentina’s public debt level, (vii) foreign and domestic investment and financing, (viii) governmental policies and the legal and regulatory environment, including import and export contracts and tax provisions, (ix) consumption levels, (x) wage and price controls and (xi) political uncertainty and social unrest.
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Government policies and regulation—which at times have been implemented through informal measures and have been subject to radical shifts—that have had a significant impact on the Argentine economy in the past have included, among others: (i) monetary policy, including exchange controls, capital controls, high interest rates and a variety of measures to curb inflation; (ii) restrictions on exports and imports; (iii) price controls; (iv) mandatory wage increases and prohibition of dismissals; (v) taxation; and (vi) government intervention in the private sector.
Any of these factors, as well as volatility in the capital markets, may adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Economic volatility in Argentina has adversely affected and may continue to adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations depend to a significant degree on macroeconomic, political, regulatory, and social conditions in Argentina. Over recent decades, the Argentine economy has experienced significant volatility, characterized by periods of low or negative growth, high and variable levels of inflation and interest rates and currency devaluation.
As a result, our business and operations have been, and may continue to be, adversely affected by economic and political developments and other material events impacting Argentina including inflation, price controls, fluctuations in foreign currency exchange rates and interest rates, currency devaluation, change in government policies relating to tariffs, public spending and investment, increased regulatory intervention, as well as international conflicts, social unrest and public security concerns.
The Argentine peso has experienced significant volatility in recent years. According to information published by Banco Nación, the peso depreciated against the U.S. dollar in approximately 22.1% in 2021 and 72.5% in 2022. Although the exchange rate remained relatively lagged for most of 2023, following the change in administration on December 10, 2023, the Government implemented a sharp exchange rate correction and introduced a crawling peg regime with a monthly adjustment of approximately 2%. As a result, the peso depreciated by 356.3% during 2023, reaching Ps. 805.45 per U.S. dollar as of December 31, 2023. As of December 31, 2024 and December 31, 2025, the peso depreciated approximately 27.7% and 41%, respectively, against the U.S. dollar.
Sharp currency devaluations have historically had a significant adverse impact on the Argentine economy, contributing to high inflation, erosion of real wages and increased challenges for companies with peso‑denominated revenues and foreign currency obligations. Similar effects could materialize in the future if the Government were to implement further abrupt devaluations or introduce multiple exchange rate regimes.
In response to exchange rate volatility, since 2019 the Argentine Government has adopted measures to restrict access to the foreign exchange market, including requirements for prior approval by the BCRA to purchase foreign currency, limitations on the holding of foreign currency in cash, restrictions on dividend remittances abroad and the imposition of additional taxes on certain foreign currency transactions. Additionally, the Government implemented a new tax at a rate of 30% on certain transactions involving the acquisition of foreign currency. For additional information see “Item 10. Additional Information—D. Exchange Controls.”
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The Government’s ability to stabilize the foreign exchange market and sustain economic growth remains uncertainty. Continued depreciation of the peso, persistent exchange controls or a further deterioration in foreign currency reserves could have a material adverse effect on Argentina’s economy and, consequently, on our business, results of operations and financial condition.
In addition, this rapid devaluation has confronted inflationary pressures, evidenced by significantly higher fuel and food prices, among other indicators. Inflation in Argentina has contributed to a material increase in our operating costs, in particular labor costs, and negatively affected our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations. There can be no assurance that inflation rates will not escalate in the future, and the effects of measures adopted or that may be adopted in the future by the Government to control inflation are uncertain. See “—Government intervention in the Argentine economy could adversely affect our business, results of operations, financial condition, the value of our securities, and our ability to meet our financial obligations” and “—High levels of inflation could negatively affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
As of December 31, 2025, net international reserves, as calculated under the methodology used by the BCRA, amounted to approximately US$2.9 billion, compared to gross international reserves of approximately US$41.1 billion. High levels of inflation could negatively affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
Argentina’s economy remains vulnerable, as reflected by the following economic conditions:

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persistently high inflation;

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volatility in real GDP growth;

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high public debt levels;

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fiscal and trade imbalances;

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high unemployment and informal employment;

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exchange rate volatility and uncertainty regarding exchange controls;

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limited access to domestic and international capital markets;

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reduced availability of long‑term credit to the private sector;

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fluctuations in international commodity prices, including oil;

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adverse weather conditions affecting agricultural exports;

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the impact of restrictive monetary policies in the United States;

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declines in sovereign bond prices and investor confidence; and

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political, social and economic events, whether in or outside Argentina.
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A decline in international demand for Argentine products, a lack of stability and competitiveness of the peso against other currencies, a decline in confidence among consumers and foreign and domestic investors, a high rate of inflation and future political uncertainties, among other factors, may affect the development of the Argentine economy which could lead to reduced aggregate demand and adversely affect our business, financial condition and results of operations.
As of the date of this Annual Report, the impact of the policies and measures adopted by the Government on the Argentine economy as a whole cannot be predicted. Also, we cannot predict the full future impact that changes in the application of the tax indexation procedure and related adjustments will have on our financial statements, or the effects on our effective tax rate or on our business, results of operations and financial condition. The factors described above, among other factors, may materially and adversely affect the development of the Argentine economy, which could adversely affect our business, financial condition and results of operations.
Political instability in Argentina may adversely affect the Argentine economy.
Argentina’s political and social environment has historically influenced the performance of the country’s economy. Political and social crises have affected and continue to affect the confidence of investors and the public, which has historically resulted in economic deceleration and heightened volatility in securities with underlying Argentine risk. Argentina’s political environment is characterized by frequent electoral cycles, shifting legislative majorities and a high degree of social polarization, which can affect the continuity, implementation and sustainability of economic policies.
While the current administration has advanced a broad economic reform agenda since taking office in December 2023, including fiscal consolidation, deregulation and changes to the foreign exchange and monetary frameworks, the political environment remains complex. Legislative elections held in October 2025 strengthened the governing coalition’s position in Congress, improving its ability to advance parts of its agenda. However, the ruling party does not hold an absolute majority, and the passage of structural reforms continues to depend on negotiations with opposition and regional blocs.
In this context, during extraordinary congressional sessions held between December 2025 and February 2026, the newly constituted Congress approved a package of significant legislative measures aligned with the current administration’s policy agenda. These measures included the approval of the 2026 National Budget, focused on maintaining a strict fiscal surplus, a labor modernization law aimed at reforming Argentina’s employment framework, amendments to the Glacier Protection Law intended to facilitate productive and mining investments, a reform to the juvenile criminal regime lowering the age of criminal responsibility, and the congressional ratification of the international trade agreement between Mercosur and the European Union. While these legislative developments signal increased governing capacity and policy momentum, their implementation, social acceptance and long‑term stability remain subject to political negotiation, judicial review, regulatory enforcement and potential opposition, and may give rise to social tensions or legal challenges.
Argentina’s political landscape remains highly polarized, with persistent social tensions, labor disputes and opposition from groups affected by fiscal adjustment measures and structural reforms. Episodes of social unrest, protests or political confrontation could weaken public support for the reform program, delay or limit the implementation of policies, or result in modifications or reversals of measures already adopted.
Financial markets in Argentina remain sensitive to political developments. Past electoral outcomes and political events have triggered abrupt movements in exchange rates, sovereign bond prices and country risk indicators. Although macroeconomic stabilization efforts have reduced some sources of volatility, investor confidence remains fragile and highly dependent on the Government’s ability to sustain political support, comply with international agreements and maintain policy consistency.
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We cannot guarantee that future economic, social and political developments in Argentina, over which we have no control, will not harm our business, the results of operations and financial situation, the value of our tradable securities and/or our ability to meet our financial obligations.
The impact of the economic measures adopted or to be adopted by the Government may affect the Argentine’s economy.
Argentina has a long history of abrupt and far‑reaching changes in economic policy, often implemented in response to macroeconomic crises. As a result, companies operating in Argentina are exposed to a regulatory and economic environment characterized by volatility, frequent policy shifts and uncertainty regarding the continuity and enforcement of government measures.
General elections were held in Argentina on October 22, 2023, which resulted in a new conformation of the Congress as from December 10, 2023 (with the president-elect’s party in the minority). A run-off election was held on November 19, 2023, through which the opposition candidate for La Libertad Avanza party, Javier Milei, was elected president. After taking office, the current administration launched a package of emergency measures aimed at relaxing controls and deregulating the economy, with the main objective of reducing the fiscal deficit. The impact of such policies, the foreign exchange market and the national economy is uncertain, and we cannot assure the impact the economy, the regulatory framework, the social situation and the political environment will have on our financial condition and results of operations.
On December 12, 2023, the Minister of Economy Luis Caputo announced a series of economic measures with a focus on the revision of fiscal, exchange and monetary policy in which, among other issues: (i) a strong cut in public spending is shown together with an increase in certain taxes, (ii) the price of the U.S. dollar was raised with respect to the Argentine peso from Ps./US$350 to Ps./US$800 and a monthly crawling peg of 2%, (iii) reduction of subsidies to energy and transportation sectors and (iv) limitation of monetary issuance and modification of the Treasury financing program in order to clean up the BCRA’s liabilities.
On December 21, 2023, Decree of Necessity and Urgency No. 70/2023 “Bases for the Reconstruction of the Argentine Economy” was published in the Official Gazette, which declared a public emergency in economic, financial, fiscal, administrative, social security, tariff, health and social matters until December 31, 2025. The public emergency was extended until December 31, 2026 by Decree No. 942/2025, which introduced a broad deregulation agenda, repealing or amending numerous laws related to state intervention in the economy, price controls, trade regulation, public procurement, and sector‑specific regimes. This decree also modified provisions of the Civil and Commercial Code, the Customs Code and other regulatory frameworks, with the stated objective of liberalizing trade, services and industry and promoting Argentina’s integration into global markets.
Decree No. 70/2023 further introduced significant changes to the labor framework, amending the Labor Contract Law No. 20,744, collective bargaining rules, union regulations and other employment regimes. These changes sought to increase flexibility in labor relations, redefine the scope of employment presumptions, expand the probationary period, introduce new contractual figures (including independent workers with collaborators), and reduce penalties and liabilities associated with employment registration.
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On December 27, 2023, the National Executive Power submitted for consideration of the National Congress the “Foundations and Starting Points Law for the Argentines’ Freedom” (“Foundations Law”). This law proposes a strong deregulation of the economy by proposing amendments and repeals of regulations in the following fields: (i) organization of the public administration; (ii) administrative procedure and regulatory quality; (iii) resolution of disputes with the State; (iv) insurance regime; (v) regime applicable to commercial companies; (vi) regime of financial administration of the State; (vii) comprehensive tax reform and establishment of a regime of exceptional regularization of tax, customs and social security obligations; (viii) agricultural, energy and tourism sectors, among other activities and industries; (ix) regime of obligations and contracts aimed at strengthening the autonomy of the will of the parties; (x) defense of competition; (xi) intellectual property; and (xii) promotion and incentives for large investments.
After six months of debate by the National Congress, on June 28, 2024, the Chamber of Deputies sanctioned the definitive text of the Foundations Law, which had previously obtained half sanction from the Senate. Among other issues, the Foundations Law includes:

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Declaration of public emergency in administrative, economic, financial and energy matters for a period of one year.

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Changes in the calculation of income tax for individuals, in the monotax regime, personal property and money laundering.

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Total or partial privatization of certain companies and companies wholly or majority owned by the national state is authorized.

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An Incentive Regime for Large Investments (Régimen de Incentivo a las Grandes Inversiones) (“RIGI”) for projects involving investments equal to or greater than US$200 million.

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The creation of a proportional retirement benefit for those who, reaching retirement age, do not reach the years of necessary pension contributions.

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A labor reform and the retirement regime.

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The amendment to the Natural Gas Act in order to, among other things, allow the extension of a license for an additional period of 20 years (as opposed to the 10 years originally established extension).
In April 2025, the Government announced a new phase of its macroeconomic program, including a significant overhaul of the foreign exchange regime. These measures established a managed floating exchange rate within a band, eliminated or relaxed several foreign exchange restrictions, authorized the payment of dividends to foreign shareholders for profits generated as from fiscal years beginning in 2025, modified import and service payment rules, and reinforced a monetary framework under which the BCRA committed not to finance fiscal deficits or remunerate monetary liabilities through issuance.
While these reforms have introduced significant changes to Argentina’s legal and economic framework, their scope, pace and reliance on emergency powers create material uncertainty. The effectiveness and durability of these measures depend on continued political support, regulatory implementation, judicial interpretation and social acceptance. In addition, Argentina’s history demonstrates that economic policies, regulatory regimes and labor frameworks may be modified or reversed following political or economic shocks, changes in government, or judicial decisions.
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As of the date of this Annual Report, it is not possible to foresee the impact that the measures adopted and those that may be adopted in the future will have on the financial situation and results of the Company’s operations and on the economic situation of Argentina.
In addition, despite signs of improvement, the new administration will still need to face macroeconomic challenges such as reducing inflation, maintaining the fiscal and trade surplus, and increasing the central bank’s reserves, as well as dealing with the evolution of the exchange rate, the payment of public debt, among other issues. It is difficult to predict the impact that the measures adopted or to be adopted in the future may have on the Argentine economy, the political and social situation and their impact on our financial condition and results of operations.
High levels of inflation could negatively affect our business, results of operations and financial condition, the value of our securities, and our ability to meet our financial obligations.
Pursuant to Argentine law, the INDEC is the only institution in Argentina entitled to publish official nationwide statistics. In addition, inflation has undermined the Argentine economy and the Government’s ability to stimulate economic growth. In the past, there have been concerns regarding the accuracy of the INDEC statistics. In 2007, the INDEC changed the way it calculated inflation statistics such as CPI and WPI.
In the past, due to the lack of accuracy of the INDEC statistics, the IMF executive board issued a declaration of censure against Argentina in connection with Argentina’s breach of its obligations to provide information to the IMF under the Articles of Agreement and called on Argentina to adopt remedial measures to address the inaccuracy of inflation and GDP data without further delay. The uncertainty relating to the inaccuracy of the economic indexes and rates may lead to a lack of confidence in the Argentine economy and may, in turn, limit our ability to access credit and capital markets, which could adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
High inflation rates affect Argentina’s foreign competitiveness and social and economic inequality, negatively impact employment, consumption and the level of economic activity, and undermine confidence in Argentina’s banking system, which could further limit the availability of and access by local companies to domestic and international credit. Inflation rates could escalate in the future, and there is uncertainty regarding the effects that the Government’s measures to control inflation may have. Increased inflation could adversely affect the Argentine economy, which in turn may have an adverse effect on our business, financial condition and results of operations.
Historically, high and volatile inflation has significantly undermined Argentina’s economy and limited the Government’s ability to foster conditions for sustained and stable growth. Inflationary pressures have adversely affected purchasing power, investment decisions, cost structures and access to long‑term financing. Although inflation has moderated in recent periods, it remains elevated by international standards, particularly in categories such as fuel, energy, transportation and food.
Following a prolonged period of accelerating inflation, the Government adopted a new macroeconomic stabilization program after President Javier Milei took office in December 2023. According to data published by the INDEC, the CPI increased by 211.4% during 2023. Subsequently, a marked deceleration in monthly inflation rates was observed in 2024 and 2025.
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Based on INDEC data, monthly CPI variations during 2024 declined progressively over the year, and inflation accumulated 117.8% for the year ended December 31, 2024. During 2025, inflation continued to decelerate, with monthly CPI increases ranging generally between 1.5% and 3.7%, and the CPI increased by approximately 31.5% for the year ended December 31, 2025, representing the lowest annual inflation rate in several years.
We cannot assure that inflation rates will decrease in the future or that any that may be taken by President Javier Milei’s administration to control inflation will be effective or successful. High inflation rates continue to be a challenge in Argentina. Significant increases in inflation rates could have a material adverse effect on Argentina’s economy and, in turn, could increase our operating costs, labor costs particularly, and could adversely affect our business, financial condition and results of operations.
As discussed elsewhere in this Annual Report, given that Argentina’s economy has been considered as hyperinflationary, since July 1, 2018, we have applied IAS 29 in our Financial Statements, which requires that the financial statements of an entity whose functional currency is that of a hyperinflationary economy, regardless of whether they are based on the historical cost method or the current cost method, be expressed in terms of the current unit of measurement at the reporting date of the reporting period. See “Presentation of Financial and Other Information—Financial Statements and Basis of Preparation.”
Because Natural Gas Transportation business segment sales represented 48% of our total revenues during the year ended December 31, 2025, and are denominated in pesos, any further increase in the rate of inflation not accompanied by a parallel increase in our tariffs would decrease our revenues in real terms and adversely affect our results of operations. Further, as a consequence of the application of IAS 29, maintaining monetary assets generates loss of purchasing power; provided that such items are not subject to an adjustment mechanism that compensates to some extent such loss. This loss is booked in the statement of comprehensive income.
Restrictions on transfers of foreign currency and the repatriation of capital from Argentina may impair our ability to pay dividends or imports and investors may face restrictions on their ability collect capital and interest payments in connection with corporate bonds issued by Argentine companies.
Without prejudice to the statements of the current president of Argentina, Javier Milei, regarding the elimination of restrictions on access to the exchange market, considering the current context of destabilization affecting Argentina, greater restrictions on access to the exchange market could be imposed in response to an outflow of capital or a significant devaluation of the peso.
The Argentine government and the BCRA have implemented certain measures that control and restrict the ability of companies and individuals to access to the foreign exchange market. Those measures include certain restrictions, such as: (i) the payment of imports and other purchases of goods abroad, (ii) the purchase of foreign currency by residents with specific application, (iii) the payment of profits and dividends, (iv) the payment of capital and interest on financial indebtedness, among others.
In this context, Argentine companies cannot save in dollars, and although it is possible to access the foreign exchange market for the payment of financial debt, such access is granted very close to the due date, and advance payments are not possible. Furthermore, access to the foreign exchange market for the payment of dividends is also restricted.
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Historically, Argentina has maintained foreign exchange controls which resulted in the coexistence of multiple exchange rates. As a consequence, the gap between the official exchange rate used for certain commercial and financial transactions and alternative exchange rates arising from capital market operations (such as the “MEP” or “contado con liquidación” rates) has at times widened significantly. During 2023, this gap exceeded 100%, reflecting severe distortions in the foreign exchange market. Following the sharp adjustment of the official exchange rate implemented in December 2023, the exchange rate gap narrowed substantially and was reduced to low double‑digit levels by the end of 2025.
Argentina’s foreign exchange regime has historically been subject to frequent changes. The Government may maintain a single official exchange rate, introduce multiple exchange rates for different types of transactions, or significantly modify the applicable exchange rate. Any such changes could substantially affect the exchange rate at which we are required to purchase foreign currency to service our foreign currency‑denominated indebtedness. In addition, the imposition of new exchange controls, capital restrictions or other measures in response to capital outflows or exchange rate volatility could adversely affect public finances and economic activity, which in turn could negatively impact our results of operations and financial condition. For additional information see “Item 10. Additional Information—D. Exchange Controls.”
As of the date of this Annual Report, the restrictions outlined above remain in place. Such measures may negatively affect Argentina’s international competitiveness, discouraging foreign investments and lending by foreign investors or increasing foreign capital outflow which could have an adverse effect on economic activity in Argentina, and which in turn could adversely affect our business and results of operations. Any restrictions on transferring funds abroad imposed by the Government could undermine our ability to pay dividends on our ADSs in U.S. dollars. Furthermore, these measures may cause delays or impose restrictions on the ability to collect payments of capital and interest on bonds issued by us. The challenge will be to achieve acceptance by creditors, in accordance with the BCRA regulations mentioned above, especially when it has highly diversified and retail creditors.
Fluctuations in the value of the Peso may also adversely affect the Argentine economy, our financial condition and results of operations.
Since January 2002, the peso has fluctuated significantly in value and generally depreciated against the U.S. dollar, with adverse consequences to our business. A substantial increase in the value of the peso against the U.S. dollar could also present risks for the Argentine economy, since it may lead to a deterioration of the country’s current account balance and the balance of payments. The devaluation has also had a negative impact on companies and affected the Government’s ability to meet its financial obligations. It has also led to an increase in prices and a decline in real wages. The devaluation of the Argentine peso also has negative consequences for the Argentine economy, reducing economic activity, employment, and public sector revenues.
Additionally, the value of the peso affects BCRA’s reserves. During 2024, these reserves remained under pressure despite measures implemented to accelerate the inflow of foreign currency. As of December 31, 2025, net reserves reached US$41,167 billion, up from US$29,640 billion in December 2024.
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Over several years, the value of the Argentine peso has experienced significant fluctuations against the U.S. dollar, depreciating by more than 100% in 2018. In 2023, 2024, and 2025, the Argentine peso depreciated by 356.3%, 27.7% and 41.0%, respectively.
In 2025, the Argentine peso continued to depreciate against the U.S. dollar and other major foreign currencies. According to the Banco Nacion’s selling exchange rate, the Argentine peso reached Ps. 1,455 to December 31, 2025, presenting a variation of 41% with respect to 2024. This is a consequence of the exchange rate policy where the Government defined a stable devaluation path of 2% per month against the U.S. dollar. Starting in February 2025, and in line with the reduction in inflation, this path was adjusted to 1%.
As of December 31, 2025, the total amount of principal and accrued but unpaid interest under our consolidated U.S. dollar-denominated indebtedness was US$1,172.2 million.
We cannot predict the future exchange rate between peso and the U.S. dollar, or how any fluctuation may affect our operational costs denominated in U.S. dollars. Also, we cannot predict success of future Government measures and the impact of them in the exchange rate or the BCRA reserves.
Further depreciation of the peso against the U.S. dollar would likely result in a material adverse effect on our business because of our exposure to financial debt in U.S. dollars. In addition, future devaluations could result in higher inflation, reduce real wages and adversely affect the Government’s ability to honor its foreign debt obligations. The depreciation of the Peso can also negatively impact businesses whose success is dependent on domestic market demand and adversely affect the Government’s ability to honor its foreign debt obligations.
A substantial increase in the exchange rate of the Peso against foreign currencies of the Peso against the U.S. dollar also represents risks for the Argentine economy since it may lead to a deterioration of the country’s current account balance and the balance of payments which may have a negative effect on GDP growth and employment, and reduce the revenue of the Argentine public sector by reducing tax revenue in real terms, due to its current heavy dependence on export taxes.
The impossibility of addressing the actual and potential risks of institutional deterioration and corruption, the economy and the financial situation of Argentina has been affected negatively and could continue to be.
Argentina is ranked 104 out of 182 in Transparency International’s 2025 Corruption Perceptions Index. The lack of a solid and transparent institutional framework for contracts with the Government and its agencies and accusations of corruption have affected and could affect negatively to Argentina.
Likewise, at the date hereof, other ongoing investigations into complaints of money laundering and corruption are underway.
Recognizing that the failure to address these issues could increase the risk of political instability, distort decision making processes and adversely affect Argentina’s international reputation and ability to attract foreign investment, on November 8, 2017, Congress passed Law 27,401 which establishes the criminal liability of legal persons and regulates integrity programs for a precise number of cases of corruption. The law holds legal persons responsible for the crimes of bribery and influence peddling, national and transnational, negotiations incompatible with the exercise of public functions, concussion, illicit enrichment of officials and employees and aggravated false reports and balances, in order to hide bribery and influence peddling, national and transnational.
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Law 27,401 assigns a decisive importance to integrity programs as an element of weighting the liability of legal persons in acts of corruption. Thus, an appropriate Integrity Program can: i) exempt from criminal liability, if a spontaneous self-complaint is made jointly and the benefit obtained is returned, ii) mitigate the eventual sanction, iii) be a condition for an effective collaboration agreement, and iv) be an enabling requirement for the offeror in certain contracts with the Government.
In this context, the Anti-Corruption Office, through Resolution No. 27/2018, established the integrity guidelines for the best compliance with the Integrity Program established in Law 27,401.
We have an Integrity Program that has not been questioned by the implementing authorities and that follows the guidelines described in Resolution No. 27/2018; as well as the provisions of Law 27,401.
There can be no assurance that the implementation of these measures by Argentina will be successful or even sufficient in strengthening Argentina’s institutions, enhancing the integrity of public officials, stopping institutional deterioration and preventing corruption. We cannot control or predict whether such investigations or allegations will lead to further political or economic instability or whether new allegations against government officials, members of the Argentine Congress, judges or owners or officers of other companies will arise, nor can we predict the outcome of any such allegations and their effect on the Argentine economy, which may be adverse.
Government intervention in the Argentine economy could adversely affect our business, results of operations, financial condition, the value of our securities, and our ability to meet our financial obligations.
Argentina has historically been characterized by a high degree of government intervention in the economy. Public utility and infrastructure companies in particular, have operated within complex, highly regulated and frequently changed frameworks. As a result, our business and operations have been, are and may continue to be affected by the Government through new or amended laws and regulations.
Historically, governmental intervention in Argentina has included nationalizations and expropriations, the imposition of price and exchange controls, restrictions on imports and exports, limitations on dividend payments, tax increases, retroactive tax claims, changes in the interpretation or application of tax laws, renegotiation or revocation of licenses, cancellation or modification of contractual rights, and delays or denials of governmental approvals.
Among other examples, in 2008, the Government absorbed and replaced the former private pension system with a public “pay as you go” pension system. As a result, all resources administered by the private pension funds, including significant equity interests in a wide range of listed companies, were transferred to a separate fund (Fondo de Garantía de Sustentabilidad or “FGS”) to be managed by the ANSES. ANSES is entitled to designate government representatives to the boards of directors of these companies. The nationalization of Argentina’s pension and retirement system was a significant change in the Government’s approach to the main public companies. FGS currently holds 25.33% of our outstanding capital stock and has two representatives on our Board of Directors. Law No. 27,574 regulates the role of the FGS’ representatives in companies in which it has a stake, providing that the FGS will dictate the necessary rules in order to regulate their appointment, function, responsibility, performance and remuneration. Law No. 27,574 has been regulated by Decree No. 1041/2020 and ANSES Resolution No. 57/2021. For additional information regarding rules and regulations that govern our relationship with FGS, see “Item 7. Major Shareholders and Related Party Transactions.”
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More recently, the current administration has pursued a broad deregulation agenda aimed at reducing state intervention, liberalizing trade and prices, and restoring market‑based incentives. These policies include a gradual elimination of price controls, substantial reduction of energy and transportation subsidies, and a process of tariff recomposition in the gas and electricity sectors. Between 2024 and 2025, utility tariffs were significantly adjusted to reflect costs more accurately, undoing years of price freezes and subsidies.
In line with these reforms, in July 2025 the Government restructured the regulatory framework of the energy sector by dissolving ENARGAS and theEnte Nacional Regulador de la Electricidad (“ENRE”) and creating a single unified regulator with broad supervisory and sanctioning powers, pursuant to decrees issued under the authority granted by Law No. 27,742. This reform aims to simplify regulation and promote competition and underscores the Government’s capacty to alter regulatory structures through executive action.
Despite the current orientation toward deregulation, Argentina’s economic and regulatory framework remains subject to significant uncertainty. The Government has broad discretionary powers, many of which are exercised through emergency legislation and delegated authority. Future political, social and/or economic developments could result in renewed government intervention, the reintroduction of controls, changes to tariff regimes, modifications to concession frameworks or other measures that could adversely affect our business.
As of the date of this Annual Report, we cannot predict the results or impact of measures on the hydrocarbons development in Argentina. We are also unable to predict whether the Government will take any additional measures that may negatively affect Argentina’s hydrocarbons market.
Argentina is an emerging market economy that is highly sensitive to local political developments that have had an adverse impact on the level of investment in Argentina and the access of Argentine companies to international capital markets. Future developments may adversely affect Argentina’s economy and, in turn, our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
We cannot provide any assurance that we will be able to access foreign exchange markets or that these measures will not cause fluctuations in the value of the peso. The setting of certain exchange controls and other future economic, social and political developments in Argentina, over which we have no control, may adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations. For additional information on developments relating to exchange controls, see “Item 10. Additional Information—D. Exchange Controls.”
Argentina’s economy may be adversely affected by economic developments in other markets, which could have a material adverse effect on Argentina’s economic growth.
Argentina’s economy is vulnerable to external shocks that may be caused by adverse developments affecting its principal trading partners and emerging markets. A significant decline in the economic growth of any of Argentina’s major trading partners (including Brazil, the European Union, the United States and China) could have a material adverse impact on Argentina’s trade balance and, therefore, adversely affect Argentina’s economic growth. Economic slowdowns have led to declines in Argentine exports in the last few years. Specifically, fluctuations in the price of the commodities sold by Argentina and a significant revaluation of the peso against the U.S. dollar could harm Argentina’s competitiveness and affect its exports.
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The economy in Brazil, one of the main import and export markets for Argentina, has experienced rising negative pressure because of political uncertainty, putting pressure on the products that Argentina exports to Brazil and its competitiveness. Argentine foreign trade is highly dependent on the Brazilian economy. Consequently, a poor performance of Brazil’s economy could lead to a deterioration of Argentina’s trade balance. Brazil is scheduled to hold presidential elections in October 2026. Additional Brazilian political and economic crises could negatively affect the Argentine economy.
Financial and securities markets in Argentina are also influenced by economic and market conditions in other markets worldwide. The monetary policy of the United States has significant effects on capital inflows and asset price movements in emerging market economies. Increases in U.S. interest rates may result in the appreciation of the U.S. dollar and decreases in prices for raw materials, which can adversely affect commodity-dependent emerging economies.
Additionally, a slowing of China’s GDP growth has led to a reduction in exports to China, which in turn has caused oversupply and price declines in certain commodities. Decreases in exports have a material adverse effect on Argentina’s public finances due to a loss of taxes on exports, causing an imbalance in Argentina’s exchange market.
Since 2023, the world has faced a range of macro challenges including the war in Ukraine, military conflicts in the Middle East, inflationary pressures and risk of global recession. The U.S. Federal Reserve increasing its target reference rate to relieve inflationary pressure has had a negative impact in the cost of credit for emerging markets.
Also, important banking entities suffered liquidity problems, giving rise to uncertainty in the global economy. This initially materialized in the United States with the collapse of Silicon Valley Bank, which the U.S. government decided not to rescue. This instability had its contagion in Europe when the shares of Credit Suisse plummeted by up to 30% and the Swiss National Bank was affected. Deutsche Bank then suffered a massive sell-off of its shares, which led to further concern at the European Central Bank.
On January 2025, President Donald Trump took office. Actions taken by the new administration in its first few months have raised doubts regarding international trade, including the possibility of renegotiation of trade agreements, implementing a stricter tariff policy and the escalation of protectionist trade policies. Furthermore, on April 2, 2025, President Trump announced that the United States would impose a 10% tariff on all countries, effective on April 5, 2025, and an individualized reciprocal higher tariff on countries with which the United States has the largest trade deficits. While certain energy products have been exempted, the effect on global economic growth and trade of these measures remains uncertain, and could disrupt global trade flows, and increase operational costs for companies reliant on international supply chains. While President Trump has further announced a moratorium on the application of certain tariffs, the tariffs are still expected to come into effect after the extension period elapses. We cannot assure that the implementation of the tariff policy as currently enacted or any changes to such tariff policy pursued by the United States’ current administration will not have an adverse effect on the global economy and in our financial condition and results of operations.
We are subject to import regulations, supply chain dependencies, and cross-border energy trade policies that could be affected by the U.S. government actions. Any tariff increases, trade restrictions, or enforcement measures targeting the energy sector could increase costs, limit access to critical infrastructure and materials, and disrupt operational continuity.
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On October 20, 2025, the U.S. Department of the Treasury agreed with the BCRA on a foreign exchange swap line for up to US$20 billion aimed at strengthening the Argentina’s international reserves position and contributing to macroeconomic stability. The U.S. Treasury also intervened directly in the local Foreign Exchange Market through the purchase of pesos, as part of a strategic support for Argentina’s economic policy.
On February 5, 2026, the Office of the United States Trade Representative published agreement between the U.S. and Argentina to ease restrictions on each other’s goods. The agreement would need to go through the Argentine Congress.
Also, President Trump announced measures related to defense and energy emergency, particularly the increase in oil production, which could have an impact on the price.
Although economic conditions vary from country to country, investors’ perceptions of events occurring in other countries have in the past substantially affected, and may continue to substantially affect, capital flows into and investments in securities from issuers in other countries, including Argentina. International investors’ reactions to events occurring in one market sometimes demonstrate a “contagion” effect, in which an entire region or class of investment is disfavored by international investors. Argentina could be adversely affected by negative economic or financial developments in other countries, which in turn may have an adverse effect on our financial condition and results of operations.
Certain economic policies of the former government administration in Argentina, including foreign exchange restrictions, led in the past to a reduction in exports and foreign direct investments, to a decline in national tax revenues and to an inability to access international capital markets. There can be no assurance that the Argentine financial system and securities markets will not be adversely affected by policies that may be adopted by the government in the future or by events in the economies of developed countries or in other emerging markets. A slowdown in economic activity in Argentina would adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Argentina’s past default and litigation with holdout bondholders may limit our ability to access international markets.
Argentina’s history of defaults on its external debt and the protracted litigation with holdout creditors, summarized below, may reoccur in the future and prevent Argentine companies such as us from accessing the international capital markets readily or may result in higher costs and more onerous terms for such financing, and may therefore negatively affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
Following the default on its external debt in 2001, Argentina sought to restructure its outstanding debt by offering holders of the defaulted bonds two opportunities to exchange them for newly issued debt securities, in 2005 and again in 2010. Holders of approximately 93% of Argentina’s defaulted debt participated in the exchanges. Nonetheless, a number of bondholders held out from the exchange offers and pursued legal actions against Argentina in the courts of the United States and several other countries.
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However, even though Argentina has successfully accessed the international capital markets since the settlement, there continues to be a risk that the country will not attract the foreign direct investment and financing needed to restart the investment cycle and achieve sustainable rates of economic growth. If that occurs, Argentina’s fiscal condition could be adversely affected, which could lead to more inflation and undermine the government’s ability to implement economic policies designed to promote growth. The difficulty of sustaining economic growth over time with reasonable price stability could result in a renewed episode of economic instability.
In addition, the foreign shareholders of several Argentine companies (including us), together with public utilities and certain bondholders that did not participate in the exchange offers described above, filed claims with the International Center for Settlement of Investment Disputes, alleging that the emergency measures adopted by the Government in 2002 did not meet the just and equal treatment requirements of several bilateral investment treaties to which Argentina is a party. Several of these claims have been resolved against Argentina. Claimants have also filed claims before arbitral tribunals under the rules of the United Nations Commission on International Trade Law (UNCITRAL) and under the rules of the International Chamber of Commerce. Several awards have been issued against Argentina and several cases are still ongoing.
Moreover, difficulties in accessing Argentina’s international credit may have an impact on our company as the Argentine government postponed the maturity dates of its bonds and cut interest rates.
Also, ongoing situations, such as the claims before the International Center for Settlement of Investment Disputes, and the economic policy measures adopted by the Government, or any future default of Argentina regarding its financial obligations may harm Argentine companies’ ability to obtain financing. Financial conditions of such access could be disadvantageous to Argentine companies and, therefore, may adversely affect our business, results of operations, financial condition, the value of our securities and our ability to meet our financial obligations.
A sustained deterioration in the terms of trade given a decline in the global prices for Argentina’s main commodity exports or an increase in the global prices for Argentina’s main commodity imports, as well as adverse weather conditions affecting the production of Argentina’s main commodity exports, could have an adverse effect on Argentina’s economic growth.
High commodity prices have contributed significantly to an increase in Argentine exports, which has in turn led to an increase in government revenues received from export taxes. However, the reliance on the export of certain commodities, such as soybeans, has made the Argentine economy vulnerable to fluctuations in commodity prices, and, consequently, the Argentine economy could be adversely affected if trading conditions decline.
In addition, adverse weather conditions, such as floods or droughts, could affect the production of the main agricultural commodities produced by Argentina, which account for a significant portion of its export revenues. Moreover, higher oil prices could lead to an increase in government expenditures. The drought experienced during the summer months of 2018 dramatically reduced the yield from Argentina’s soybean crop. If agricultural commodity prices decline or their production is affected by weather or other variables, the Argentine economy could be adversely affected. These circumstances could also have a negative impact on tax revenues, the BCRA’s reserves, the availability of foreign currency and ultimately negatively affect our economic and financial performance.
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Besides, in March 2020, after a failure to reach an agreement between the members of the OPEC and Russia to stabilize the oil market, Saudi Arabia decided to increase its oil production. This decision has triggered the most important decline in the oil price since 1991, of around 30%, which added to the fragile macroeconomic situation in Argentina, generating uncertainty regarding the production and development of natural gas in the country, especially in the Vaca Muerta area. In December 2020, OPEC and its oil-producing allies agreed to increase production by 500,000 barrels per day beginning in January. The group exerts considerable influence over world energy markets. Uncertainty about oil prices and other commodities remain and there can be no assurances about any measures that the Government may take in response to key macroeconomic variables, particularly on the energy sector.
Decisions relating to international oil prices could have a negative impact on Argentina’s economy as, to achieve a fiscal surplus, the country should develop new production projects, such as Vaca Muerta formation, increase its revenues and maintain its ability to service its sovereign debt. Either of these results would adversely impact Argentina’s economic growth and, therefore, our financial condition and results of operations.
Downgrades in the credit rating or rating outlook of Argentina could impact the rating of our securities or adversely affect the market price of our securities.
In August 2018, Moody’s revised its outlook of Argentina’s long-term and short-term sovereign credit rating to Caa2, primarily as a result of the sharply weaker economic activity and uncertain prospects for multiyear fiscal consolidation and market financing availability as IMF funds are used up, posing risks to sovereign debt sustainability. In addition, on August 29, 2019, S&P downgraded Argentina’s long-term and short-term sovereign credit ratings from “B” to “SD,” primarily as a result of an erosion of the Argentine debt profile, the economic growth trajectory and the dynamics of inflation, against the backdrop of the implementation of a challenging economic adjustment program. Fitch, Moody’s and S&P increased Argentina’s credit rating in September 2020 following the successful refinancing of Argentina’s external bonds. While the debt restructuring in 2020 improved Argentina’s credit rating, there are still concerns about debt sustainability and the country’s ability to meet its payment obligations in the future. In September 2021, Argentina’s credit rating according to Fitch Ratings was “RD” (restricted default) for foreign currency debt and “CC” for local currency debt. In March 2023, Fitch downgraded the credit rating to C, the lowest level above default.
Argentina’s long-term debt denominated in foreign currency, as of the date of this Annual Report, is rated “Caa3 (stable)” by Moody’s, ” “CCC+” by S&P, and “CCC+” by Fitch.
However, there can be no assurance that Argentina’s credit rating or rating outlook will not be downgraded in the future, which could have an adverse effect on the rating of our securities or adversely affect the market price of our securities.
The Argentine government may mandate salary increases for private sector employees, which would increase our operating costs.
In the past, the Government has passed laws, regulations and decrees requiring companies in the private sector to maintain minimum wage levels and provide specified benefits to employees. Argentine employers, both in the public and private sectors, have experienced significant pressure from their employees and labor organizations to increase wages and to provide additional employee benefits. Due to high levels of inflation, employees and labor organizations regularly demand significant wage increases.
It is possible that the Argentine government could adopt measures mandating further salary increases or the provision of additional employee benefits in the future. Any such measures could have a material and adverse effect on our business, results of operations and financial condition.
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Argentine corporations may be restricted from making payments in foreign currencies or from importing certain products
There are certain restrictions in Argentina that affect the corporations’ ability to access the Official Free Exchange Market (Mercado Libre de Cambios) (“MLC”) to acquire foreign currency to transfer funds to other countries, service debt, make payments outside Argentina and other operations, requiring, in some cases, prior approval by the Central Bank. These restrictions may affect our operations and our expansions projects, as they require the import of services and goods for which payment may be restricted. The Government may impose or create further restrictions on the access to the MLC. In such case, the ability of Argentine corporations to make payments outside Argentina and to comply with their obligations and duties may be affected.
In addition, as a result of the deepening of exchange controls, the difference between the official exchange rate, which is currently utilized for both commercial and financial operations, and other informal exchange rates that arose implicitly as a result of certain operations commonly carried out in the capital market. The Government could maintain a single official exchange rate or create multiple exchange rates for different types of transactions, substantially modifying the applicable exchange rate at which we acquire currency to service our outstanding foreign currency denominated liabilities. We cannot predict how such current restrictions may evolve after this Annual Report, mainly regarding limitations to transfer funds outside Argentina.
The Government may impose further exchange controls or restrictions to capital transfers and modify and adopt other policies that may limit or restrict our ability to access international capital markets, to make payments of principal and interest and other additional amounts outside the country (including payments relating to our notes), to import certain products or goods that we use as inputs, or affect in other ways our business and our operational results, or cause the market value of our ADSs and our common shares to decline. Exchange controls in an economic environment in which the access to local capital markets is restricted may cause an adverse effect in our activities, mainly in our ability to make payments of principal and/or interest of our notes in foreign currency.
The conflict between Russia and Ukraine and between Israel and Iran could adversely affect the global economy, the Argentine economy and our operational results and financial condition.
On February 24, 2022, the President of the Russian Federation, Vladimir Putin, announced a military operation in the eastern Donbas region of Ukraine and began a full-scale invasion of the country.
The invasion received widespread international condemnation, with worldwide protests against the Russian invasion of Ukraine. The United States, the United Kingdom and other countries of the European Union imposed economic sanctions on Russia-such as the exclusion of certain Russian banks from the SWIFT financial system, airspace restrictions, export restrictions of Russian oil and gas, among others-which could eventually affect the supply of oil and gas from this country and trigger higher inflation and market shocks.
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Actual and threatened responses to Russia’s invasion, as well as a rapid peaceful resolution to the conflict, may also impact the markets for certain commodities, such as electricity, oil and natural gas, and may have collateral impacts, including increased volatility, and cause disruptions to the availability of certain commodities, commodity and futures prices and the supply chain globally. Rising wheat prices raised tensions in countries like Egypt, which rely heavily on wheat exports from Russia and Ukraine, and sparked fears of social unrest. On the other hand, Russia is the second largest oil exporter in the world and the largest producer of natural gas, causing the world oil prices jumped over US$110 per barrel in 2022, and the cost of natural gas reached a new record high in Europe. In this sense, in Argentina, the natural gas supply for this next winter may be affected, with negative effects on the energy generation, especially for industries. The shortage on natural gas may adversely affect our pipeline system and operations.
More recently, geopolitical tensions in the Middle East have intensified following military actions involving Iran and Israel, as well as retaliatory measures and heightened involvement by the United States. In this context, Argentina has taken diplomatic and regulatory positions aligned with certain international partners, including the designation of specific Iranian entities as terrorist organizations. The evolution of these conflicts remains highly uncertain.
On January 17, 2026, President Javier Milei signed a decree officially designating the Quds Force —the external operations arm of Iran’s Islamic Revolutionary Guard Corps— as a terrorist organization. This measure brings Argentina’s policy into closer alignment with that of the United States, which has previously classified the Quds Force as a terrorist entity. As of the date of this Annual Report, we cannot predict the final outcome or consequences that may arise from this conflict, and the direct or indirect effects that this conflict may have on Argentina and particularly on our business.
The continuation or escalation of these geopolitical conflicts may lead to renewed volatility in global energy markets, affect the availability and pricing of oil, natural gas and liquefied natural gas (“LNG”), and generate indirect effects on Argentina’s balance of payments, foreign exchange reserves, inflation levels and economic growth. Any material deterioration in the global or domestic macroeconomic environment, increased energy price volatility, constraints on energy supply or disruptions in international markets could adversely impact demand for energy, regulatory conditions, the operation of our pipeline system and our financial performance.
As of the date of this Annual Report, we cannot predict the ultimate outcome of these geopolitical events or the extent of their direct or indirect effects on Argentina or on our business.
We continue operating in a period of economic uncertainty and capital markets disruption, which has been significantly impacted by geopolitical instability.
The open conflict in Europe is a trigger for many the geopolitical risks over the short- and medium-term. As Western sanctions on Russia bite and Russia weaponizes energy, the siege-like standoff between the West and Russia may escalate, and ripple effects from Ukraine war or the unknown effects of the arising conflict between Israel and Iran will continue to amplify challenges, as emerging markets face a slow rebound after the economic crisis, including high food and energy costs, higher U.S. interest rates, a strong U.S. dollar and slow Chinese growth.
Any of the above-mentioned factors could affect our business, prospects, financial condition, and operating results. The extent and duration of the military action, sanctions, and resulting market disruptions are impossible to predict, but could be substantial. Any such disruptions may also magnify the impact of other risks described in this Annual Report.
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Risks Relating to Our Shares and ADSs
Shareholders outside Argentina may face additional investment risk from currency exchange rate fluctuations in connection with their holding of our shares or ADSs represented by ADRs. Exchange controls imposed by the Government may limit our ability to make payments to the Depositary in U.S. dollars, and thereby limit ADR holders’ ability to receive cash dividends in U.S. dollars.
We are an Argentine company and any future payments of dividends on our shares will be denominated in pesos. The peso has historically fluctuated significantly against many major world currencies, including the U.S. dollar. A depreciation of the peso would likely adversely affect the U.S. dollar or other currency equivalent amount of any dividends paid on our shares and could result in a decline in the value of our shares and ADRs as measured in U.S. dollars.
From 2011 to December 2015, Argentine companies were required to obtain prior approval from BCRA and Argentine tax authorities in order to engage in certain foreign exchange transactions. In September 2019 the Government reinstalled the above previous measures and since then has implemented additional exchange control restrictions. Thus, our shareholders’ ability to receive cash dividends in U.S. dollars was limited by the ability of the Depositary for our ADR program to convert cash dividends paid in pesos into U.S. dollars. Under the terms of our Deposit Agreement for the ADRs, to the extent that the Depositary can in its judgment, and in accordance with local exchange regulations, convert pesos (or any other foreign currency) into U.S. dollars on a reasonable basis and transfer the resulting U.S. dollars outside of Argentina, the Depositary will as promptly as practicable convert or cause to be converted all cash dividends received by it in pesos on the deposited securities into U.S. dollars. If in the judgment of the Depositary this conversion is not possible on a reasonable basis (or is not permitted by applicable Argentine laws, regulations and approval requirements), the Depositary may distribute the pesos received or in its discretion hold such currency uninvested without liability for interest thereon for the respective accounts of the owners entitled to receive the same. As a result, if the exchange rate fluctuates significantly during a time when the depositary cannot convert the foreign currency, you may lose some of the value of the dividend distribution.
In the event that the BCRA does not grant the applicable authorization, we reserve the right to agree with the Depositary the reasonable legal measures for the effective payment of dividends to ADR holders who reside outside of Argentina. As a result, such ADR holder may not timely receive the full dividend distribution or receive at all any such distribution.
Our principal shareholders exercise significant control over matters affecting us, and may have interests that differ from those of our other shareholders.
As of the date of this Annual Report, our controlling shareholder is CIESA, which holds 53.83% of our common stock. FGS holds 25.33% of our common stock. Local and foreign investors hold the remaining ownership of our common stock. CIESA is under co-control of Pampa Energía S.A. (“Pampa Energía”), which holds 50% of CIESA’s common stock, and Grupo Inversor Petroquímica S.L. (member of GIP Group, controlled by the Sielecki family; “GIP”), and PCT L.L.C. (“PCT”), which directly and indirectly through PEPCA S.A. (“PEPCA”) holds a 50% of the common stock of CIESA.
We cannot assure you that the interests of our principal shareholders will not diverge from the interests of our other investors. See “Item 7.  Major Shareholders and Related Party Transactions.”
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Sales of a substantial number of shares could decrease the market prices of our shares and the ADRs.
CIESA holds 53.83% of our Class A shares. Pursuant to the Pliego de Bases y Condiciones para la Privatización de Gas del Estado S.E. (the “Pliego”), CIESA may not reduce its shareholding below 51% of our share capital without the competent authorities’ approval. The market prices of our common shares and ADRs could decline as a result of sales by our existing shareholders, such as the ANSES, or of any other significant shareholder of common shares or ADRs in the market, or the perception that these sales could occur.
Under Argentine law, shareholder rights may be fewer or less well defined than in other jurisdictions.
Our corporate affairs are governed by our Bylaws, the General Companies Act No. 19,550 (“General Companies Act”) and Law No. 26,831, which differ from the legal principles that would apply if we were incorporated in a jurisdiction in the United States or in other jurisdictions outside Argentina. In addition, rules governing the Argentine securities markets are different and may be subject to different enforcement in Argentina than in other jurisdictions.
As a foreign private issuer we are exempt from certain rules that apply to domestic U.S. issuers.
We are subject to the informational requirements of the Exchange Act applicable to foreign private issuers. Under U.S. securities laws, as a foreign private issuer we are exempt from certain rules that apply to domestic U.S. issuers with equity securities registered under the Exchange Act.
For example, as a foreign private issuer, in the United States, we are not subject to the same disclosure requirements as a domestic U.S. registrant under the Exchange Act, including the requirements to prepare and issue quarterly reports on Form 10-Q or to file current reports on Form 8-K upon the occurrence of specified significant events, the proxy rules applicable to domestic U.S. registrants under Section 14 of the Exchange Act or the insider reporting and short-swing profit rules applicable to domestic U.S. registrants under Section 16 of the Exchange Act. In addition, we have relied, and intend to keep relying, on exemptions from certain U.S. rules which permit us to follow Argentine legal requirements rather than certain of the requirements that are applicable to U.S. domestic registrants. As a result of the above, even though we are required to file reports on Form 6-K disclosing the information which we have made or are required to make public pursuant to Argentine law, or are required to distribute to shareholders generally, and that is material to us, you may not receive information of the same type or amount that is required to be disclosed to shareholders of a U.S. company
We are also exempt from many of the corporate governance requirements of the NYSE.
Changes in Argentine tax laws may adversely affect the tax treatment of our Class B Shares or ADSs.
Pursuant to Law No. 26,893, the sale, exchange or other transfer of shares and other securities is subject to capital gains tax at a rate of 15% when the purchaser and the seller are not Argentine residents. When both the purchaser and the seller of our Class B Shares or ADRs are non-residents, the purchaser is required to pay the capital gains tax in addition to the purchase price of the Class B Shares or ADSs. In addition, if the purchaser is legally liable for capital gains taxes in Argentina, then the purchaser will likely not be entitled to receive any tax credit in the United States in respect of the payment of any such taxes.
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On December 29, 2017, the Macri Administration enacted, through Decree No. 1112/2017, a tax reform (the “Tax Reform”). The Tax Reform provides that only the results from sales, transfers or dispositions of shares, securities representing shares and certificates of deposit of shares that are carried out through stock exchanges or stock markets authorized by the CNV under conditions that guarantee the principle of price/time priority of the offers obtained by individuals and undivided estates resident in Argentina shall be exempted.
The foregoing exemption shall also be applicable to foreign beneficiaries to the extent that said beneficiaries do not reside in and the funds do not come from non-cooperative jurisdictions. Decree No. 279/2018 provides that until the decree of the Income Tax Law of Argentina regulates the definition of non-cooperative jurisdiction, the white-list established in Decree No. 589/2013 (dated 05/27/2013) will be applicable to determine if a jurisdiction is non-cooperative jurisdiction.
The Tax Reform also establishes an exemption for such foreign beneficiaries on the sale of share certificates issued outside of Argentina that represent shares issued by Argentine companies which have been granted with a public offering authorization by the CNV (i.e., ADRs). The exemptions will only apply if the foreign beneficiaries do not reside in and the funds do not arise from “non-cooperating” jurisdictions.
Pursuant to Decree No. 279/2018, if the foreign beneficiary resides in a non-cooperative jurisdiction or the funds come from a non-cooperative jurisdiction, the capital gains tax rate is 35%.
Whereas, previously, if the sale was carried out between non-Argentine residents the non-Argentine resident purchaser was responsible for paying the tax when the seller was a non-resident, currently it is the seller, through their legal representative domiciled in Argentina, who is responsible for paying the tax, except when the purchaser is a resident individual or legal entity. If the seller does not have a legal representative, the tax should be paid by the seller according to Decree No. 279/2018.
Further rulemaking or interpretation of the amended income tax law by the Argentine tax authority may adversely affect the tax treatment of our Class B Shares or ADSs.
Holders of ADRs may be unable to exercise voting rights with respect to our Class B Shares underlying the ADRs at our shareholders’ meetings.
We will treat the Depositary for all purposes as the shareholder with respect to the shares underlying the ADRs. As a holder of ADRs representing the ADRs being held by the Depositary in your name, you will not have direct shareholder rights and may exercise voting rights with respect to our Class B Shares represented by the ADRs only in accordance with the Deposit Agreement. There are no provisions under Argentine law or under our Bylaws that limit the exercise by ADR holders of their voting rights through the Depositary with respect to the underlying Class B Shares. However, there are practical limitations on the ability of ADR holders to exercise their voting rights due to the additional procedural steps involved in communicating with these holders. ADR holders may be unable to exercise voting rights with respect to our Class B Shares underlying the ADRs as a result of these practical limitations.
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Holders of ADRs may be unable to exercise preemptive, accretion or other rights with respect to the Class B shares underlying the ADSs.
Holders of ADSs may not be able to exercise the preemptive or accretion rights relating to the shares underlying the ADSs unless a registration statement under the Securities Act is effective with respect to those rights or an exemption from the registration requirements of the Securities Act is available. We are not obligated to file a registration statement with respect to the shares relating to these preemptive rights, and we cannot assure you that we will file any such registration statement. Unless we file a registration statement or an exemption from registration is available, holders may receive only the net proceeds from the sale of their preemptive rights by the depositary or, if the preemptive rights cannot be sold, they will be allowed to lapse. As a result, U.S. holders of Class B Shares or ADSs may suffer dilution of their interest in our company upon future capital increases.
In addition, under the General Companies Act, foreign companies that own shares in an Argentine corporation are required to register with the Superintendency of Corporations (Inspección General de Justicia) (“IGJ”) in order to exercise certain shareholder rights. Voting rights in a Shareholder meeting can be exercised through duly instituted agents, as is regulated by Law No. 26,831. If you own our Class B Shares directly (rather than in the form of ADSs) and you are a non-Argentine company and you fail to register with the IGJ, your ability to exercise your rights as a holder of our Class B Shares may be limited.
The NYSE and/or BYMA may suspend trading and/or delist our ADSs and common shares, respectively, upon occurrence of certain events relating to our financial situation.
The NYSE and/or the BYMA may suspend and/or cancel the listing of our ADSs and common shares, respectively, in certain circumstances, including upon the occurrence of certain events relating to our financial situation.
The NYSE may in its sole discretion determine on an individual basis the suitability for continued listing of an issue in the light of all pertinent facts. Some of the factors mentioned in the NYSE Listed Company Manual, which may subject a company to suspension and delisting procedures, include: “unsatisfactory financial conditions and/or operating results,” “inability to meet current debt obligations or to adequately finance operations,” and “any other event or condition which may exist or occur that makes further dealings or listing of the securities on the NYSE inadvisable or unwarranted in the opinion of NYSE.”
We cannot assure you that the NYSE and/or BYMA will not commence any suspension or delisting procedures. A delisting or suspension of trading of our ADSs or common shares by the NYSE and/or BYMA, respectively, could adversely affect our results of operations and financial conditions and cause the market value of our ADSs and common shares to decline.
The price of our Class B Shares and the ADSs may fluctuate substantially, and your investment may decline in value.
The trading price of our Class B Shares is likely to be highly volatile and may be subject to wide fluctuations in response to factors, many of which are beyond our control. Such factors include:

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fluctuations in our periodic operating results;

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changes in financial estimates, recommendations or projections by securities analysts;

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changes in conditions or trends in our industry;
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events affecting equities markets in Argentina;

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legal or regulatory measures affecting our financial conditions;

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departures of management and key personnel; or

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potential litigation or the adverse resolution of pending litigation against us or our subsidiaries.
The stock markets in general have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of the companies involved. We cannot assure you that trading prices and valuations will be sustained. These broad market and industry factors may materially adversely affect the market price of our Class B Shares and the ADSs, regardless of our operating performance. Market fluctuations, as well as general political and economic conditions in Argentina, such as recession or currency exchange rate fluctuations, may also adversely affect the market price of our Class B Shares and the ADSs. In particular, currency fluctuations could impact the value of an investment in Argentina. Although our ADSs listed on the NYSE are U.S. dollar-denominated securities, they do not eliminate the currency risk associated with an investment in an Argentine company.
For example, due to various factors (including, but not limited to, the abrupt variation in the exchange rate in Argentina) prices of equity securities in Argentina have decreased substantially since 2018, which prompted investors to dispose of their investments in Argentina resulting in further downward pressure on the price of equity securities. Future sales of substantial amounts of our Class B Shares and ADSs, or the perception that such future sales may occur, may result in additional pressure on the price of our Class B Shares and ADSs. Also, future sales of treasury shares, may also have a negative impact on the price of our Class B Shares and ADSs.
Following periods of volatility in the market price of a company’s securities, that company may often be subject to securities class-action litigation. This kind of litigation may result in substantial costs and a diversion of management’s attention and resources, which would have a material adverse effect on our business, results of operations and financial condition.
The relative volatility and illiquidity of the Argentine securities markets may substantially limit the ability to sell the Class B Shares underlying the ADSs on the BYMA at the price and time desired by the shareholder.
Investing in securities that trade in emerging markets, such as Argentina, often involves greater risk than investing in securities of issuers in the United States, and such investments are generally considered to be more speculative in nature. The Argentine securities market is substantially smaller, less liquid and more concentrated and can be more volatile than major securities markets in the United States and is not as highly regulated or supervised as some of these other markets. There is also significantly greater concentration in the Argentine securities market than in major securities markets in the United States Accordingly, although shareholders are entitled to withdraw the Class B Shares underlying the ADSs from the depositary at any time, the ability to sell such shares on the BYMA at a price and time shareholders might want may be substantially limited.
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Item 4.
Our Information
A. Our History and Development
General
Operations
We commenced commercial operations on December 28, 1992, as the largest company created in connection with the privatization of Gas del Estado S.E. (“GdE”), the Argentine state-owned natural gas company, the integrated operations of which included natural gas transportation and distribution. GdE was divided into ten companies: two transportation companies and eight distribution companies.
Our legal name is Transportadora de Gas del Sur S.A. We are a limited liability company (sociedad anónima), incorporated under the laws of Argentina on December 1, 1992. Our registered offices are located at Cecilia Grierson 355, 26th Floor, Buenos Aires (C1107CPG), Argentina, our telephone number is (54 11) 4371-5100 and our web address is www.tgs.com.ar. According with our public records, our length of life is set to expire on November 30, 2091 (which could be renewed, in accordance with the applicable law).
We are currently the largest transporter of natural gas in Argentina and operate the most extensive pipeline system in Latin America in terms of length, delivering approximately, as of December 31, 2025, more than 60% of the total natural gas transported in Argentina, through 5,746 miles of pipeline, of which we operate 4,768 miles on an exclusive basis pursuant to the License. Our transportation system connects the Neuquén, San Jorge and Austral basins, the major natural gas fields located in the south and west of Argentina, to the greater Buenos Aires area and the major consumption centers of southern Argentina. During the fiscal year 2025, approximately 81% of our revenues of this business segment corresponds to firm natural gas transportation services under firm long-term natural gas transportation contracts. Natural gas transportation customers with firm contracts pay for the contracted pipeline capacity regardless of actual usage. Our Natural Gas Transportation business is regulated by ENARGAS, and revenues from this business segment represented 41%, 36% and 22% of our total revenues for the years ended December 31, 2025, 2024 and 2023, respectively.
We conduct our Natural Gas Transportation business pursuant to the License granted under the Natural Gas Law No. 24,076 (“Natural Gas Law”). Pursuant to the terms of the License, its original term was scheduled to expire on December 28, 2027 and, subject to compliance with certain technical and regulatory conditions, could be extended by the Executive Branch. In addition, the Foundations Law, expanded the extension regime allowing extensions to be granted for an additional period of up to 20 years.
In accordance with Section 6 of the Natural Gas Law, on September 8, 2023 we submitted a formal request to ENARGAS to initiate the procedures for the extension of our License. On June 13, 2024, ENARGAS issued its technical report concluding that we had broadly complied with our obligations under the License, the Natural Gas Law and applicable regulations. Following the non-binding public hearing held on October 21, 2024, ENARGAS completed its review process and submitted its recommendation to the Executive Branch.
On July 24, 2025, the Executive Branch ratified the Memorandum of Agreement entered into between us and the Ministry of Economy on July 11, 2025, pursuant to which the term of our License was formally extended for an additional period of 20 years, commencing on December 28, 2027. As a result, our License will remain in effect through December 28, 2047, subject to continued compliance with applicable legal, regulatory and contractual obligations. See “—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Tariff situation—Certain Restrictions with Respect to Essential Assets.”
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The License gives us the exclusive right to operate the existing southern Argentine natural gas transportation pipeline system. Our natural gas transportation system connects major natural gas fields in southern and western regions of Argentina, with both distributors and large consumers of natural gas in those regions as well as in the greater Buenos Aires area, the principal population center in Argentina.
The map below illustrates the natural gas pipeline system in Argentina as of December 31, 2025:
graphic
For additional information regarding our property, plant and equipment, see “—D. Property, Plant and Equipment” below.
We are also one of the largest processors of natural gas and one of the largest marketers of Liquids in Argentina. We operate the Cerri Complex and the associated logistics and storage facilities of Puerto Galván located in Bahía Blanca in the Province of Buenos Aires where Liquids are separated from the natural gas transported through our pipeline system and stored for delivery. Due to its strategic location within the Argentine natural gas transportation system, our Cerri Complex can process gas proceeding from the Neuquén, San Jorge and Austral basins. This provides the plant with great versatility in terms of natural gas availability, and the possibility to select the gas that is processed according to its quality (liquid contents). Revenues from our Liquids Production and Commercialization business represented 38%, 46% and 59% of our total revenues during the years ended December 31, 2025, 2024 and 2023, respectively.
We also provide midstream integral solutions related to natural gas production, from the wellhead up to the transportation systems. In addition, through our subsidiary Telcosur, we provide telecommunications services. Aggregate net revenues from our midstream and telecommunications business segment represented 21%, 18% and 20% of our total revenues during the years ended December 31, 2025, 2024 and 2023, respectively.
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Within the framework of the agreements signed with the former Secretariat of Energy, Mining and Hydrocarbons of the Province of Neuquén and Gas y Petróleo de Neuquén S.A. in April and November 2018, we timely completed the construction of a catchment and gathering pipeline and a natural gas conditioning plant in the Vaca Muerta field that will allow the gathering of non-conventional gas from the Neuquén Basin and its subsequent injection into the main gas pipeline systems, ensuring its supply to all of Argentina’s regions.
The Vaca Muerta system has two gathering pipes: the first has a length of 71 miles, a 36” diameter and a 35 MMm3/d transportation capacity (“Northern Section”) and the second has a 22 miles extension, a 30” diameter and 25 MMm3/d transportation capacity (“Southern Section”). The natural gas transported through this pipeline system is treated at a new conditioning plant that we built at Tratayén, Province of Neuquén with an initial capacity of 7.8 MMm3/d. This project consolidates our position as the first midstream services provider in the Vaca Muerta field and required an investment of approximately US$260 million in the aggregate. On April 29, 2019, the assembly and pressurization work on the connection of the Vaca Muerta pipeline to Neuba II Gas Pipeline were completed, which led to revenues from the month of May 2019. On August 22, 2019, the Secretary of Hydrocarbon Resources issued Resolution No. 491/2019, which declared this project as “critical” pursuant to Law No. 26,360. This allows us to obtain certain tax benefits from the investments in this project.
In March 2022, we executed an agreed minute with the Undersecretary of Energy, Mining and Hydrocarbons of the Province of Neuquén (Subsecretaría de Energía, Minería e Hidrocarburos de la Provincia del Neuquén) whereby the parties commit to granting us an extension of the transportation concession to build and operate the pipeline expanded North Tranche II, which will gather the off-spec natural gas production from several hydrocarbons fields located mainly in the Vaca Muerta formation. In August 2022, we began this work with an investment of approximately US$ 48 million, this 20 miles long work will extend from the Los Toldos I Sur area to El Trapial (Vaca Muerta Norte). The pipeline has been operational since the end of July 2023.
In November 2024 and February 2025, we commissioned additional investments that allow us to expand our natural gas conditioning capacity and increase our role in the Vaca Muerta development, including the installation of two conditioning turbine expanders provided by Propak Systems Ltd (each a “Propak Plant”) to be operated in gas conditioning mode until we are able to develop a natural gas processing project in the Tratayén Plant. The Propak Plants may be converted to allow processing of natural gas in the future, and they increased our conditioning capacity by 6.6 MMm3/day for each Propak Plant. With the addition of the Propak Plants, our total gas conditioning capacity increased up to 28MMm3/d since February 2025. The total estimated investment for this expansion was US$350 million.
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graphic
For more information regarding our investments in Vaca Muerta area see “—B. Business Overview—Midstream—Midstream Services.”
Controlling shareholders
As of the date of this Annual Report, our controlling shareholder is CIESA, which holds 53.83% of our common stock. Other local and foreign investors hold the remaining shares of our common stock, including FGS, which holds 25.33% of our common stock. CIESA is under co-control of Pampa Energía which holds 50% of the common stock of CIESA, and GIP and PCT, which directly and indirectly through PEPCA hold 50% of the common stock of CIESA.
For additional information regarding CIESA’s current organizational structure, see “Item 7. Major Shareholders and Related Party Transactions—A. Major Shareholders.”
Capital expenditures
From January 1, 2023, through December 31, 2025, our aggregate capital expenditures, in Current Currency, amounted to Ps. 1,052,282 million. Such capital expenditures include Ps. 309,889 million related to natural gas transportation system, Ps. 46,945 million related to liquids production and commercialization activities and Ps. 695,448 million related to Midstream segment.
For the years 2025, 2024, and 2023, capital expenditures mostly include improvement to our natural gas transportation system and works performed for the enhancement of Tratayén Plant and maintenance works of our natural gas pipeline system. Information relating to the size and financing of future investments is included in “Item 5. Operating and Financial Review and Prospects.”
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Available documentation
The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC and state the address of that site (http:// www.sec.gov). Our internet address is www.tgs.com.ar. This URL is intended to be an inactive textual reference only. It is not intended to be an active hyperlink to our website. The information included in our website or which may be accessed through our website is not part of this Annual Report, is not incorporated by reference herein or otherwise and should not be relied upon in determining whether to make an investment in any securities issued by us.
B. Business Overview
NATURAL GAS TRANSPORTATION
As a transporter of natural gas, we receive natural gas owned by a shipper, usually a natural gas distributor, at one or more intake points on our pipeline system for transportation and delivery to the shipper at specified delivery points along the pipeline system. Under applicable law and our License, we are not permitted to buy or sell natural gas except for our own consumption and to operate the pipeline system. See “—Regulatory Framework” below for more information.
Our pipeline system connects major natural gas fields in southern and western Argentina with distributors and other users of gas in those areas and the greater Buenos Aires area. TGN, the only other natural gas transportation operating company that supplies the Argentine market, holds a similar license with respect to the northern pipeline system, which also provides natural gas transportation services to the greater Buenos Aires area.
Natural gas transportation revenues accounted for 41%, 36% and 22% of our total revenues in the years ended December 31, 2025, 2024 and 2023, respectively. In 2025, 74.2% of our average daily natural gas deliveries were made under long-term firm transportation contracts. See “—Customers and Marketing” below. Natural gas firm transportation contracts are those under which capacity is reserved and paid for regardless of actual usage by the customer. Almost all of our natural gas firm contracted capacity is currently subscribed for at the maximum tariffs allowed by ENARGAS. During 2025, the amount of revenues derived from natural gas firm transportation contracts was Ps. 567,936 million, representing 81% of the total revenues for the Natural Gas Transportation segment for such year. Substantially all of our remaining natural gas deliveries were made under natural gas interruptible transportation contracts entered into predominantly with four natural gas distribution companies, power plants and industrial customers. Interruptible contracts provide for the transportation of natural gas subject to available pipeline capacity. The Government has at times directed us to interrupt supply to certain customers and make deliveries to others without regard as to whether they have natural gas firm or interruptible contracts. See “—Regulatory Framework—Industry Structure” below for more information.
Expansions of the system. Since 2002, as a result of the pesification and freezing of natural gas public services tariffs, we lost the ability to invest in the expansion of our transportation system. Consequently, responsibility for system expansion was transferred to fiduciary structures organized by the Government and financed through tariff surcharges set at values higher than our frozen tariffs.
In February 2017, the Ministry of Mines and Energy called for a national public tender for the purchase of pipelines to extend the natural gas network in some areas of the Province of Santa Fé, the Patagonian Andes and the coast of the Province of Buenos Aires.
In this context, we entered into a joint venture (Unión Transitoria de Empresas under Argentine Law) (“UT”) with Sociedad Argentina de Construcción y Desarrollo Estratégico S.A. (“SACDE”), a related company, for the purpose of participating jointly in a  National Public Bid —Bid No. 452-0004-LPU17— titled “Assembly of Pipes for the Construction of the Project:  Expansion of the Natural Gas Transportation and Distribution System.” In this regard, the Ministry of Mines and Energy awarded to the UT the construction of the Regional II-Recreo/Rafaela/Sunchales Regional Gas Pipeline.
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On July 9, 2021, the UT and ENARSA signed a restarting order and a restarting act of the works related to the Sunchales pipeline (the “Sunchales Work”), by means of which the work schedule was readjusted and ENARSA also assumed the commitment to manage and join efforts to guarantee the cash flow in order to avoid new impacts to the economic-financial structure of the contract of the Sunchales Work, which would give rise to new requests - on the part of the UT - for the recomposition of the economic-financial equation of the contract and of the execution schedule of the Sunchales Work.
On February 7, 2022, the Secretary of Energy issued Resolution No. 67/2022 creating the “Transport.Ar Producción Nacional” Gas Pipeline System Program (“Transport.Ar Program”) and declaring the construction of the GPM and complementary works as of public interest. The total investment would be roughly US$3.4 billion, of which 75% were expected to be allocated to the construction of the pipeline.
By means of Decree No. 76/2022 dated February 11, 2022, the concession of this gas pipeline was granted to ENARSA for a term of 35 years and the trust FONDESGAS (Fondo de Desarrollo Gasífero Argentino) was created, with Integración Energética Argentina S.A. (“IEASA”) as trustee and beneficiary, and Banco de Inversión y Comercio Exterior S.A. (a public bank) as trustee. ENARSA can designate a third-party to build, operate and maintain the facility.
The Transport.Ar Program also included the construction of a gas pipeline between the towns of Mercedes and Cardales, the expansion of the final sections of the gas pipeline in the metropolitan area of Buenos Aires, the reversal of the northern gas pipeline, and the expansion of various sections of the Centro-Oeste gas pipeline, both operated by TGN.
On July 24, 2023, ENARSA completed the expansion works of the NEUBA II Gas Pipeline included in the Transport.Ar Program, adding an incremental transportation capacity of 7 million cubic meters per day to the Buenos Aires Metropolitan Area. By the end of August 2023, the first stage of the GPM, corresponding to the Tratayén–Salliqueló section, was authorized for operation. The complementary Mercedes–Cardales gas pipeline was authorized in the last week of November 2023, and the 29-kilometer expansion of the final sections of our system was enabled by late August 2023.
In October 2024, the installation of compressor plants was commissioned allowing the increase of the transportation capacity from its initial capacity of 11 MMm3/d to 21 MMm3/d.
We are the technical operator of GPM, including its two compressor plants, after ENARSA awarded us the operation and maintenance through a private tender on June 5, 2023, for a period of 5 years, extendable for up to 12 months. We also serve as the technical operator of the Gasoducto Mercedes Cardales tranche, based on an agreement with a term of 5 years.
In June 2024, we submitted to the Government a private initiative proposal related to the GPM, together with a commitment to make investments in the regulated natural gas transportation system.
The primary objective of the GPM expansion project is to generate significant foreign currency savings for Argentina by replacing imports of diesel and liquefied natural gas with natural gas produced in Vaca Muerta, particularly during the winter season, while ensuring domestic supply.
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This project was declared of national public interest and authorized for bidding by ENARSA. On May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, which was awarded to us and approved by the Secretariat of Energy on October 17, 2025.
The project comprises: (i) the expansion of the GPM transportation capacity by 14 MMm³/d for which Transportadora de Gas del Sur S.A.–Dedicated Branch 1 was created in December 2024 to frame this project within the RIGI. The resulting transportation capacity expansion, as specified by Decree No. 54/2025, will be included within the framework of the GPM transportation concession granted to ENARSA, which, according to the Decree No. 76/2022, was made as provided in the Hydrocarbons Law No. 17,319. The estimated investment for this phase is approximately US$560 million.
We committed to make complementary investments in the regulated natural gas transportation system that we operate, including the construction of approximately 20 kilometers of pipeline loops and the installation of approximately 15,000 HP of compression capacity on the NEUBA II pipeline, together with other related works and tests aimed at increasing the maximum operating pressure. These investments, with an estimated cost of approximately US$220 million, are expected to increase transportation capacity in the final sections of the system by approximately 12 MMm3/d.
graphic
The works are scheduled to be completed by April 30, 2027. The request for adherence to the RIGI was submitted on October 26, 2025.
In connection with this expansion, during March 2026, the Company carried out the Public Tender No. 1/2026 to award incremental transportation capacity associated with these works. In such process, the Company received requests exceeding 32 MMm³/d, reflecting demand almost three times higher than the capacity initially offered in this first stage. The requests received were awarded on April 15, 2026, for an aggregate volume of 5.4 MMm³/d, following the completion of the procedures and time periods required under the public tender. The remaining capacity is expected to be offered and awarded in subsequent stages during the coming months.
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Customers and Marketing
Our principal service area is the greater Buenos Aires region in central-eastern Argentina. We also serve the more rural provinces of western and southern Argentina. As of December 31, 2025, our service area contains 5.8 million end users, including 4.1 million customers in the greater Buenos Aires area. Direct service to residential, commercial, industrial and electric power generation end users is mostly provided by four gas distribution companies in the area, all of which are connected to our pipeline system: Metrogas S.A., Naturgy Argentina S.A., Camuzzi Gas Pampeana S.A. and Camuzzi Gas del Sur S.A. These natural gas distribution companies serve, in the aggregate, 66% of the natural gas distribution market in Argentina. The other five Argentine distribution companies are located in and serve northern Argentina and are not connected directly to our pipeline system.
The table below contains certain information for the year ended December 31, 2025, as it relates to the distribution companies that are connected to our pipeline system:
Company
 
Annual
 deliveries
(MMm3)
  
Volume of
market
 served (in %)
  
No. of end users
 (in millions)
  
Deliveries
received from
us (in %)
 
Metrogas (1)
  
5.9
   
21
   
2.4
   
85
 
Camuzzi Pampeana (1)
  
5.1
   
18
   
1.1
   
87
 
Camuzzi Sur
  
4.6
   
16
   
0.6
   
100
 
Naturgy Argentina (1)
  
3.3
   
11
   
1.7
   
67
 
       
66
   
5.8
     
(1)
Also connected to the TGN system.
Source: ENARGAS
The firm average contracted capacity for our four largest distribution customers, Pampa Energía and for all other customers, as a group, as of December 31, 2025, 2024 and 2023, together with the corresponding net revenues derived from natural gas firm transportation services during such years and the net revenues derived from interruptible services during such years are set forth below:
  
For the years ended December 31,
 
  
2025
  
2024
  
2023
 
  
Average
firm
contracted
capacity
 (MM3/d)
  
Total net
revenues
(millions of
pesos)
  
Average
firm
contracted
capacity
 (MM3/d)
  
Total net
revenues
 (millions of
pesos)
  
Average
firm
contracted
capacity
(MM3/d)
  
Total net
revenues
 (millions of
pesos)
 
Metrogas
  
16.7
   
174,486
   
16.7
   
149,465
   
16.7
   
69,664
 
Camuzzi Pampeana
  
15.6
   
128,717
   
15.6
   
110,945
   
15.5
   
51,765
 
Naturgy Argentina …
  
11.8
   
105,363
   
11.8
   
90,477
   
11.8
   
42,147
 
Camuzzi Sur
  
12.1
   
37,786
   
10.8
   
26,910
   
10.8
   
12,855
 
Pampa Energía
  
3.6
   
29,318
   
3.7
   
22,477
   
3.2
   
9,914
 
Others
  
29.4
   
229,454
   
24.9
   
180,022
   
25.1
   
97,406
 
Total
  
89.2
   
705,124
   
83.5
   
580,296
   
83.1
   
283,751
 
We play a leading role in the natural gas industry in Argentina and satisfy 80 direct customers and 5.8 million indirect customers for the year ended December 31, 2025.
As of December 31, 2025, the total contracted firm or “take or pay” capacity by costumers was 89.4 MMm3/d with a weighted average life of approximately 11 years.
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graphic
Pipeline Operations
Pipeline Deliveries. The following table sets forth our average daily natural gas firm and interruptible transportation deliveries for 2025, 2024 and 2023:
  
For the year ended December 31,
 
  
2025
  
2024
  
2023
 
Firm:
 
Average daily
deliveries (MMm3/d)
  
Average daily
deliveries
 (MMm3/d)
  
Average daily
deliveries
(MMm3/d)
 
Metrogas
  
11.5
   
11.4
   
10.9
 
Camuzzi Pampeana
  
9.8
   
9.6
   
10.5
 
Camuzzi Sur
  
8.1
   
7.3
   
7.4
 
Naturgy Argentina
  
6.5
   
7.1
   
6.5
 
Others
  
19.1
   
15.6
   
14.5
 
Subtotal firm
  
55.1
   
50.9
   
49.8
 
Subtotal interruptible
  
19.1
   
18.8
   
17.0
 
Total
  
74.2
   
69.5
   
66.8
 
Average annual load factor (1)
  
83
%
  
83
%
  
80
%
Average winter heating season load factor (1)
  
86
%
  
84
%
  
90
%
(1)
Average daily deliveries for the period divided by average daily firm contracted capacity for the period, expressed as a percentage.
During 2025, the daily average natural gas injection to the pipeline system operated by us amounted to 86.4 MMm³/d. Such volume includes contributions from the Austral, San Jorge Gulf and Neuquén basins and from GPM at its access to the regulated transportation system in Salliqueló. Transportation through the GPM was of an average 16.1 MMm³/d, representing a 39% increase compared to 2024.
In 2025, the contribution of the Neuquén Basin was 0.8% above the volume supplied the previous year, mainly due to higher gas transportation capacity from the Vaca Muerta field facilitated by the GPM pipeline.
As opposed to the previous year, the southern basins of Argentina increased their injection levels. Although the Chubut and Santa Cruz fields are going through their natural decline stage, the Austral basin recorded a significant increase, from an average of 15.8 MMm³/d to 20.7 MMm³/d, owing to the Fénix project. Consequently, such increase not only offset the fields’ natural decline but also boosted the total injection of the south, which went up by 2.7 MMm³/d.
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The chart below shows the main operating data for the natural gas transportation segment.
 graphic
Natural Gas Transportation System Improvements. In 2025, 2024 and 2023, we made capital expenditures aimed at enhancing of our natural gas transportation system’s safety and reliability. We operate our pipeline system and the pipeline constructed pursuant to the Gas Trust in accordance with Argentine natural gas transmission safety regulations, which are substantially similar to U.S. federal regulations. Based on the pipeline inspection reports we have received to date and the current operation of the pipeline system, we do not foresee any significant safety risks that could not be managed at a low level. In order to identify changes in the safety regulations that our pipeline system has to comply with, we conduct inspections for the purpose of detecting increases in the population density in the areas through which our pipeline system extends. Changes in population densities may require us to increase safety measures in certain sections of the system.
The “greater” Buenos Aires area comprises the City of Buenos Aires and its surrounding area. One end of our natural gas transportation system is located in the greater Buenos Aires area, where we transfer natural gas for further delivery to major natural gas distribution companies.
System Improvements. In 2025, 2024 and 2023, our pipeline system satisfactorily met the demands generated by the winter season and the requirements of ENARGAS. To that effect, we carried out several maintenances, prevention and inspection works.
During 2025, we carried out in-line inspections along 1,200 km of pipelines and direct integrity assessments, such as Close Interval Surveys (CIS) and Direct Current Voltage Gradient (DCVG) surveys, over 220 km, with the aim to identify and control threats to integrity, such as external corrosion, geometrical defects, construction anomalies and recoating failures, among others.
As for our recoating program, in the reported year we executed recoating replacements in 8.4 km of pipelines and we made progress in recoating works at three valve facilities along the San Martín pipeline in the province of Buenos Aires. These tasks seek to mitigate the risk of external corrosion and/or Stress Corrosion Cracking (SCC), besides surveying and correcting anomalies that might evolve and affect the service, thus extending the useful life of our facilities.
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To strengthen integrity in high population density areas, we conducted filling works in reinforcement sleeves, reducing their exposure to damage. We additionally completed 785 km of inline inspection with EMAT technology to detect cracking.
Our assets integrity team carried out a campaign to assess 28 defects (external corrosion. geometric defects, anomalies in welding) and completed 35 repairs with reinforcement sleeves and 48 pipelines replacements, many of them in simultaneous interventions to minimize impact on the system. We also assessed the integrity of 31 bypasses in sections of the province of Buenos Aires.
Regarding cathodic protection, we reinforced reliability by means of the installation of a new unit, 13 current reinforcement lenses and the upgrading of 16 facilities that were technologically obsolete. We additionally reconditioned compressor plants, added three reinforcements and conducted specific surveys at three plants. At the Cerri Complex and Galván Plant, we installed seven reinforcements and renovated three facilities.
All the above mentioned works in this section are aimed at ensuring business continuity and our facilities’ integrity, underlining our commitment to safety and the care of people and the environment, all main cornerstones in rendering a reliable public service.
With the purpose of raising awareness among the community, we increased our facilities’ signaling and conducted virtual and presence-based damage prevention activities, including campaigns in the media and networks, radio broadcasting and meetings with municipalities and ground-breaking companies in the provinces of Buenos Aires, Neuquén and Rio Negro.
On the topic of the technological update of our systems, we completed the integration of the Belisle and Cervantes compressor plants to the operative center of the City of Buenos Aires, which have joined the Olavarría and Saturno plants in the pursuit of a sustained digital transformation process and the adaptation to a new remote assets maintenance and operations philosophy, based on data.
We started the adjustment of the control system dashboards of the 3 turbocompressors of the Gaviotas Compressor Plant. Additionally, in 2026 we will add to our tasks the development of the control system and the electricity generation system of the plant.
We have completed the upgrading and integration of the vibration monitoring systems of the Olavarría and Ordoqui plants to the Bentley Nevada centralized system. Pursuant our upgrading schedule, in 2026 we will continue with the Fortín Uno, Barker y Chelforó compressor plants.
In the field of operative safety, we have concluded the extended basic engineering for the control systems upgrading at the Chelforó, La Adela, Saturno and Fiat plants. Procurement of materials has already started at the Chelforó, La Adela, Saturno plants. This upgrading plan seeks to mitigate technological obsolescence of assets and guarantee the required reliability standards to pursue our strategy on transportation systems’ remote operation.
Pursuant our assets upgrading plan, we have prioritized the modernization of the auxiliary systems in order to strengthen the operative reliability of the plants. In 2025, we acquired new compressor units and dryers. This project phase included their provision for the compressor plants of San Antonio, Piedra Buena, Barker, Magallanes, San Julián, Fortín Uno, Chelforó, Dolavon and Bajo Gualicho. The main goal of this renovation is to ensure reliability and maintain air quality in accordance with operative standards. We are also updating control systems and fuel charts at Fortín Uno and Belisle compressor plants. In 2025, we completed the engineering stage and the partial procurement of materials. The physical intervention of units has been scheduled for 2026.
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We upgraded the oil air coolers of one of the turbines belonging to the Solar Compressor Plant. This improvement seeks to ensure the availability and the adequate functioning of the unit during high-regime periods and extreme temperatures.
On the topic of environmental care, we finalized the assembling of biodigester systems at 11 compressor plants: San Antonio, Conesa, Magallanes, Moy Aike, Piedra Buena, San Julián, Río Seco, Bosque Petrificado, Pico Truncado, Garayalde and Dolavon. The biodigesters adjustment and installation plant is planned to be executed in 2026.
Within the framework of our Emissions Reduction Plan, after concluding the campaign to detect and quantify natural gas leakages emissions, we have moved forward to the ensuing mitigation stage. To comply with this plan, in 2025 we acquired 46 valves with technological improvements to replace assets and eliminate leakages, which were distributed at different facilities.
Works at Liquids Facilities
Pursuant to our corporate goals on safety, reliability and operative efficiency, in this year we executed key initiatives at the Cerri Complex, the Galván Plant and transversal areas. These actions consolidated our business sustainability and strengthened the competitiveness of our operations.
Cerri Complex
During 2025, we implemented significant improvements focused on strengthening the safety and integrity of critical assets. In the field of industrial safety, we upgraded the fire extinguishing system through the integral replacement of pipes and the addition of a new water curtain cooling system for the cryogenic plant ovens, improving contingencies protection standards. With respect to regulatory compliance, we adapted spheres 2 and 3 and McKee tanks to ensure their compliance with standards in force. Finally, to preserve the integral structure and extend the useful life of the units, we conducted interventions in the legs of the spheres.
Galván Plant
With the purpose of enhancing operations, we replaced two critical lines for refrigerated products that were under inspection due to their width and we implemented improvements to increase flexibility at MEGA-TGS transfers, boosting response capacity in the face of demand variations. With respect to compliance to standards, we adapted sphere 9 to meet regulatory standards.
Transversal Projects
With business sustainability and profitability in mind, we developed projects that maintain production stability throughout the whole year, including during high temperature periods. We also made progress in addressing obsolescence through the substitution of mass flow meters at the absorption plant, ensuring accuracy in the measurement and mitigating operative risks.
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These actions underscore our commitment to industrial safety, operative excellence and the creation of sustainable value, ensuring processes reliability and market competitiveness.
Works at Vaca Muerta Facilities
During the year we finalized the installation and startup of the second conditioning module of the Propak Plant, which allowed us to significantly expand the plant capacity. This work constitutes a milestone in the consolidation of the Vaca Muerta system infrastructure, raising the total plant capacity to 28 MMm³/d.
To support Vaca Muerta’s system sustained growth, we conducted expansion works at the inflow facility. We also completed the installation of a third module of condensate stabilizers, which strengthens the plant capacity to process higher volumes and ensures the quality enhancement of the final product.
Technical Assistance Services Agreement. As part of its bid to purchase a 70% interest in us from the Government, CIESA was required to have an investor-company with experience in natural gas transmission that would serve as our technical operator. In late 1992, we entered into a Technical Assistance Agreement with PEPCA (the “Technical Assistance Agreement”), an indirect, majority-owned subsidiary of Enron Corp. The term of the Technical Assistance Agreement was for eight years from December 28, 1992, renewable automatically upon expiration for an additional eight-year term and was assigned to Petrobras Argentina S.A. (“Petrobras Argentina”) as part of a master settlement agreement. Since July 2004, Petrobras Argentina was our technical operator and was in charge of providing assistance related to, among others, the operation and maintenance of the natural gas transportation system and related facilities and equipment in order to ensure that the performance of the system is in conformity with international natural gas transportation industry standards and in compliance with certain Argentine environmental standards.
On July 27, 2016, Petrobras Argentina was acquired by Pampa Energía. For further information, see “Item 7. Major Shareholders and Related Party Transactions—A. Major Shareholders.”
With the prior approval of ENARGAS and our Board of Directors, in December 2017, we and Pampa Energía agreed to a technical, financial and operational assistance service agreement (the “SATFO”) for a three-year term. The SATFO substantially contains the same terms as the Technical Assistance Agreement, as amended. However, the scope of the contract was extended to include a greater number of services that Pampa Energía must render us. Any amendment, assignment or even termination of the SATFO has to be authorized by ENARGAS. Pursuant to the SATFO, the currency for the technical assistance fee paid to Pampa Energía is U.S. dollars. Our Audit Committee analyzed the SATFO and concluded that its price is on market terms.
The SATFO sets out the services to be provided by Pampa Energía to us, at the request of our Chief Executive Officer. Between December 2017 and October 2019, we received from Pampa Energía technical, financial and operational assistance and we paid a monthly fee for such services in amounts equal to the greater of (i) US$3 million and (ii) an amount equal to 7% of the difference between our net income before interests and income taxes of the most recently ended twelve-month period and US$3 million.
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The services provided by Pampa Energía to us under the SATFO include assisting us in the following matters to the extent that they arise in the ordinary course of business: (i) replacement, repair and renovation of facilities and equipment to ensure that the performance of the system is in accordance with international gas transportation industry standards; (ii) preparation of performance evaluations, operating cost analysis, construction assessments and advice related to budget control; (iii) advice regarding safety, reliability and efficiency of system operation and gas industry services; (iv) advice regarding compliance with applicable laws and regulations relating to safety and industrial hygiene, pollution and environmental protection of the system; (v) routine and preventive maintenance of the system; (vi) staff training; (vii) design and implementation of the necessary procedures to provide with the aforementioned services; (viii) financial and insurance advice; (ix) advice on operational improvements such as risk analysis, generation and commercialization of electric energy, operative management of the “midstream,” human resources management, and legal and supply management; (x) advice on non-regulated businesses such as midstream, electric, petrochemical, processing, and construction, among others; and (xi) design and implementation of all major aspects of natural gas transportation and liquids production, as well as administrative information and control system to adequately inform our management group.
Our Board of Directors, at its meeting held on September 17, 2019, approved a proposal for Pampa Energía, as technical operator of the SATFO, for a significant reduction in the compensation it receives under the SATFO. The general and special shareholders meeting held on October 17, 2019, ratified such proposal. The Audit Committee also expressed its favorable opinion to such proposal, as required by the Capital Markets Law No. 26,831 (“Capital Markets Law”), because Pampa Energía is our related party.
According to such amendment, we extended the term of the SATFO until December 27, 2024 (automatically renewable for three more years) and replaced the provisions relating to the calculation of the fee payable to Pampa Energía. Pursuant to the amended SATFO, the monthly fee payable to Pampa Energía shall be equal to the greater of: (i) US$0.5 million or (ii) the variable compensation that arises from applying to comprehensive income before results and income taxes for the year but after deducting also the above fixed amount) the following scheme:

From 12/28/2019 to 12/27/2020:
  
6.5
%
From 12/28/2020 to 12/27/2021:
  
6.9
%
From 12/28/2021 to 12/27/2022:
  
5.5
%
From 12/28/2022 to 12/27/2023:
  
5.0
%
From 12/28/2023 to 12/27/2024 and onwards:
  
4.5
%.

For the year ended December 31, 2025, we recorded a charge of Ps. 32,931 million for services rendered by Pampa Energía pursuant to the amended SATFO.
The Argentine Natural Gas Industry
Historical Background. Prior to the privatization of GdE, the Argentine natural gas industry was effectively controlled by the Government.
In 1992, the Natural Gas Law was passed providing for the privatization of GdE. The Natural Gas Law and the related decrees provided for, among other things, the transfer of substantially all of the assets of GdE to two natural gas transportation companies and eight distribution companies. Currently there are nine authorized companies to distribute natural gas in Argentina. The ninth concession was added in 1998 and covers the Mesopotamian provinces, Formosa, Chaco, Entre Rios and Misiones which previously had no network for natural gas service. The license for the Mesopotamian region was awarded to GasNea S.A. The transportation assets were divided into two systems on a broadly geographical basis, the northern and southern trunk pipeline systems, designed to give both systems access to natural gas sources and to main centers of demand, including the greater Buenos Aires area. As a result of the division, our natural gas transportation system is connected to the two natural gas distribution systems serving the greater Buenos Aires area, one serving Buenos Aires Province (excluding the greater Buenos Aires area and the northeast of this province) and one serving southern Argentina. TGN is connected to five distribution systems serving northern Argentina. TGN is also connected to the natural gas distribution systems serving the greater Buenos Aires area and, to a limited extent, the natural gas distribution system serving Buenos Aires Province (excluding the greater Buenos Aires area). In the two instances where we are directly connected to a natural gas distribution system with TGN, we are the principal supplier of natural gas transportation services.
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The Natural Gas Law and the related decrees granted each privatized natural gas transportation company a license to operate the transferred assets, established a regulatory framework for the privatized industry based on open, non-discriminatory access, and created ENARGAS to regulate the transportation, distribution, marketing and storage of natural gas. The Natural Gas Law also provided for the regulation of wellhead gas prices in Argentina for an interim period. Prior to deregulation, the regulated price was set at US$0.97 per million British thermal units (MMBtu) at the wellhead, which had been the regulated price since 1991. Pursuant to Presidential Decree No. 2,731/93, gas prices at the wellhead were deregulated as of January 1, 1994, and, from that date until the year 2002, the average price of gas increased.
In spite of the devaluation of the peso in 2002, increases in wellhead natural gas prices were limited until 2004. From May 2004 until August 2005, wellhead gas prices increased in a range from 105% to 180% (depending on the gas basins) for power plants, industries and large businesses. These adjustments were complemented by lower increases in the price of natural gas for CNG vehicles.
In November 2020, the Argentine Government implemented the Plan Gas.Ar through Decree No. 892/2020, later extended until 2028 by Decree No. 730/2022. The Plan Gas.Ar was designed to encourage investment in natural gas exploration and production by establishing incentive prices and guaranteed demand through competitive bidding processes. Under this framework, natural gas producers entered into supply agreements with distributors, sub‑distributors and Compañía Administradora del Mercado Mayorista Eléctrico S.A. (“CAMMESA”), with prices referenced to the Point of Entry to the Transportation System (“PIST”).
Between 2020 and 2022, several bidding rounds were conducted under the Plan Gas.Ar, resulting in long‑term supply commitments primarily from the Neuquén Basin, which by 2021 accounted for approximately 60% of Argentina’s natural gas production. Subsequent bidding rounds extended existing commitments and incorporated incremental production projects in the Austral and Northwest basins, reinforcing supply during peak winter demand periods.
In parallel with production incentives, the Government addressed structural infrastructure constraints. In February 2022, the Secretariat of Energy created the “Transport.Ar Producción Nacional” program through Resolution No. 67/2022, declaring the construction of the GPM and its complementary works to be of national public interest. By Decree No. 76/2022, the transportation concession for the GPM was granted to IEASA for a term of 35 years, and the FONDESGAS trust was created to finance the project.
The first stage of the GPM, connecting Tratayén in the Neuquén Province with Salliqueló in the Buenos Aires Province, was authorized for operation in August 2023. Complementary works, including the Mercedes–Cardales pipeline and expansions of final sections of our system, were authorized between August and November 2023. In October 2024, additional compressor plants were commissioned, increasing the transportation capacity of the initial GPM section from 11 million cubic meters per day to 21 MMm3/d.
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We currently act as the technical operator of the GPM, including its compressor facilities, pursuant to an operation and maintenance agreement awarded by ENARSA in June 2023. We also act as technical operator of the Mercedes–Cardales pipeline under a separate agreement.
The decline in natural gas imports from Bolivia prompted the Government to advance the reversal of the Northern Gas Pipeline, enabling the transportation of natural gas from Vaca Muerta to northern and northwestern regions of Argentina. As part of this initiative, in November 2024 the Government inaugurated the Tío Pujio–La Carlota pipeline, which interconnects the Central and Northern pipeline systems. Additional works, including compressor automation and pipeline looping, are expected to be completed during 2025.
In December 2023, Decree No. 55/2023 declared a state of emergency in the national energy sector and provided for the intervention of ENARGAS starting January 1, 2024. The tariff review process initiated under this framework was extended through July 9, 2026, by Decree No. 370/2025.
In June 2024, we submitted a private initiative proposal to the Ministry of Economy aimed at expanding natural gas transportation capacity by approximately 14 million cubic meters per day. The project was declared of national public interest and authorized for bidding. On May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, which was awarded to us and approved by the Secretariat of Energy on October 17, 2025.
Natural Gas Demand. Natural gas consumption in Argentina has played a significant role in the energy industry in recent years, reaching more than 52% of total national energy consumption, which is greater than the comparable percentage for worldwide energy consumption.
In 2025, natural gas consumption reached 138 MMm3/d, above the volume recorded in 2024, which had been of 137 MMm³/day. This variation represents a 0.6 % year-on-year increase. Such growth was mainly attributable to a higher demand from thermal power plants–benefited from more natural gas availability for power stations- and to higher volumes for export. On the other hand, priority demand remained at levels similar to the previous year
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The graphic below illustrates the breakdown of natural gas consumption in Argentina in 2025 and 2024 by type of consumer:
graphic
Source: ENARGAS
Beginning in 2003, a sharp increase in natural gas demand occurred as a consequence of: (i) the recovery of certain industries in the Argentine economy in 2003, (ii) the 2002 devaluation of the peso as well as the transportation and distribution tariffs and the elimination of both tariff and wellhead gas price adjustments, making this fuel relatively inexpensive for consumers as compared to other types of fuel, the prices of which are affected by inflation, (iii) the growth of GDP between 2003 and 2013 and (iv) the energy policy that seeks to be one of the main producers of natural gas that allows not only to replace the import of natural gas but also to generate the necessary resources for its export. As a result, natural gas became, by far, the cheapest fuel in Argentina and high rates of substitution of natural gas for other fuels in industry, power plants and vehicles have been observed. Likewise, the rising demand for gas has also been based on the recovery of many industrial segments of the Argentine economy, and the lack of availability of natural gas to meet current demand represents a challenge for continued industrial growth at the rates achieved in recent years.
The demand for natural gas in Argentina is highly seasonal, with natural gas consumption peaks in winter. The source of seasonal changes in demand is primarily residential consumers. In order to bridge the gap between supply and demand, especially with respect to peak-day winter demand, the Government has entered into several natural gas import agreements.
The most important agreement was signed with the Bolivian government in June 2006 and amended in May 2010 and July 2012. The agreement provides for the import of natural gas from Bolivia to Argentina to be managed by IEASA to deal with the decrease in domestic natural gas production and in an effort to maintain supplies at similar levels to the previous years. During 2022, the sixth addendum to the Bolivian import contract came into force, which modifies the price formula and, due to the decline in Bolivian fields, reduces supply volumes. The seventh addendum to the gas import contract between ENARSA and YPFB (Yacimientos Petrolíferos Fiscales Bolivianos) was signed on December 30, 2022, and includes a reduction in the volume of natural gas that will be received. In October 2023, this contract was modified and Bolivia ceased to supply Argentina with firm natural gas on July 31, 2024.
In the winter of 2025, average temperatures of 14.0 °C were recorded, slightly higher than the ones logged in the same period of 2024 (13.3 °C). This accounts for the fact that residential and SMEs demand maintained similar levels to the volumes corresponding to the previous year. The 2025 winter was the first complete period that could rely on Perito Moreno pipeline full transportation capacity, reaching 21 MMm³/d, which meant higher local natural gas availability. Therefore, exports were maintained even in winter months, mainly to Chile through the Gas Andes pipeline, as such dispatch did not affect supply to the domestic market, given the current design of the transportation infrastructure.
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Thanks to the incentive scheme proposed by the Plan Gas.Ar and the increase in transportation capacity with the commissioning of the Tratayén—Salliqueló pipeline in 2023, production levels have increased, continuing this trend throughout 2025. This greater availability of local natural gas allows for sustained exports, mainly to Chile through the Gas Andes pipeline, even during the winter months, taking advantage of the fact that the shipment of these volumes would not restrict supply in the domestic market given the current design of the transportation infrastructure.
Regarding variations against 2024, which can be seen in the graph below, in May 2025 priority demand recorded a lower consumption than in 2024, with an average difference of 15.6 MMm³/d, followed by a significant upturn in June. Unlike the previous year, low temperatures were recorded as from the month of June, which generates a major gap in priority demand when comparing the months of May and June.
With regard to power plants, variations against the previous year are accounted mainly by the monthly average temperatures. Elevated consumption is observed in January and February when high temperatures channeled consumption to power plants and a marked decrease towards the last months of the year, compared to 2024.
Concerning exports, the greater gas availability recorded in the reported year, compared to 2024, was translated into a positive variation in exported volumes.
The following graph shows the monthly consumption in 2025 in MMm3/d for each of the demand sectors, compared to the total demand in 2024.
graphic
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Gas Supply. There are 24 known sedimentary basins in the country, 12 of which are located entirely onshore, six of which are combined onshore/offshore and eight of which are entirely offshore. Production is concentrated in five basins: Norwest in northern Argentina, Neuquén and Cuyo in central Argentina, and San Jorge Gulf and Austral in southern Argentina. In 2025, 70% of the natural gas transported by our system originated in the Neuquén Basin with the remainder coming primarily from the Austral basin and the re-gasifying LGN tanker located in Bahía Blanca. Our pipeline system is connected to the Neuquina, Austral and San Jorge Gulf basin. We are not connected to the Cuyo or Northwest basin.
The graph below shows the evolution of gross natural gas production by basin from 2015 to 2025 in MMm3/d:
graphic
Source: Secretary of Energy
In 2025, natural gas imports were maintained as a complementary resource to meet demand peaks and ensure supply to critical areas.
Pipeline imports from Bolivia went down by over 80% in a year-on-year basis, reaching marginal levels throughout the whole year. Supply was concentrated in winter peaks and in some cases under spot agreements implemented by private parties to supply Argentine North West power plants. Daily records ranged from 0.9 to 3.2 MMm³/day.
LNG imports at the Escobar terminal were carried out by ENARSA, which assigned 24 shipments for winter. The maximum daily volumes reached 16.6 MMm3/d in the month of June. The decrease compared to the previous year reflects greater supply from Vaca Muerta and the strategy to minimize import purchases.
The drop in imports (-14.8% in LNG and -81.3% in pipeline gas) can be explained by the increase in local production (Vaca Muerta), improvements in infrastructure and moderation in demand.
Total local gas injection in June 2025, highest peak in the year, reached 151 MMm3/d, compared to the 143 MMm3/d recorded in August 2024. Thus, the reported year injection showed an 8 MMm3/d increase with respect to the highest volume recorded in 2024, and a 18 MMm3/d increase with respect to the injection recorded in 2023.
In a breakdown analysis of natural gas operators, in 2025 Total Austral S.A. ranked as the main gas producer in Argentina with a share of 24% of the total national production, followed by YPF with 23%.
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graphic
Source: Secretary of Energy
The Neuquén Basin has the largest total natural gas injection, while the remaining basins continue with their natural decline (including Bolivia), which made the construction of a third trunk pipeline imperative to evacuate the incremental gas associated with the development of reserves in the Neuquén Basin.
In recent years, there have been no requests from potential parties interested in contracting additional capacity, mainly due to the lack of gas and the gradual declines of conventional fields, especially from the reception areas of Tierra del Fuego, Santa Cruz and Chubut. This situation was not the same with respect to the Neuquén Basin where the natural gas from the unconventional fields of Vaca Muerta, as from the Plan Gas.Ar, has boosted production in that region, completing the transportation capacity from that basin, making necessary and essential the expansion of the gas pipeline system that allows exploiting the energy potential available in Vaca Muerta.
Thus, by the end of August 2023 the first stage of the GPM (Tratayén- Salliqueló section), which was executed by ENARSA, was enabled. Its complementary works, namely, the Mercedes - Cardales gas pipeline was enabled in the last week of November 2023 and the extension of 29 km over the final sections of our pipeline was already enabled by the end of August 2023. In October 2024, the installation of the compressor plants that raise the transport capacity of this first section to 21MMm3/d was completed.
The Vaca Muerta formation, located in the Neuquén Basin, is considered one of the most prominent shale plays globally, and is the world second-largest shale gas development after the U.S. Permian Basin. The development of the Vaca Muerta formation plays an important role in the Argentine economy, and therefore the national and provincial governments have introduced changes to the regulatory framework for exploration and production of unconventional hydrocarbons, in order to attract investments.
Since 2018, when we first set foot in Vaca Muerta, our strategy has focused on being a leading company in the provision of integrated services and a key player in the energy development of Argentina and the region. Our conditioning plant in Tratayén is a groundbreaking project that contributes to this energy growth.
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Distribution of the Vaca Muerta Formation in the Basin and our infrastructure
 graphic
Source: Internal information
Vaca Muerta is no longer at an early exploratory stage, but rather in a phase of large-scale development, although it remains less mature than major unconventional plays in the United States and Canada. In this regard, the Permian Basin continues to be a relevant geological and operational benchmark for Vaca Muerta, given similarities in reservoir characteristics, while differing substantially in terms of infrastructure scale, capital availability and market access.
In recent years, Vaca Muerta has shown sustained growth in activity and production, reaching record levels ofdrilling and completion operations and consolidating its role as the main source of natural gas and crude oil production in Argentina
According to data from official sources and international energy agencies, the Neuquén Basin—driven primarily by Vaca Muerta—currently accounts for more than 70% of Argentina’s natural gas production and a significant share of its oil output.
Despite this progress, the pace and scale of future development in Vaca Muerta will continue to depend on the expansion of transportation infrastructure, access to domestic and export markets, and the stability of the regulatory and macroeconomic framework. Based on recent projections by international energy agencies, including the International Energy Agency and the U.S. Energy Information Administration, Argentina’s technically recoverable shale gas resources rank among the largest globally. Production from the Neuquén Basin could reach levels in the order of 140–150 million cubic meters per day toward the end of this decade, with higher production levels dependent on the timely expansion of transportation infrastructure and export facilities, as well as on regulatory and macroeconomic stability.
Neuquén Basin. The largest natural gas basin and the major source of natural gas supply for our system is the Neuquén Basin, located in west central Argentina. Since the discovery of Vaca Muerta formation, this basin is themost prolific basins of the country accounting approximately 72% of natural gas production in the country.
Since then, the development of non-conventional gas in the Province of Neuquén has played a leading role in the increase in production of natural gas.
During 2025, natural gas production in the Neuquén Basin increased by 0.8% with respect to 2024, while natural gas production in the remaining Basins declined.
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During 2025, natural gas production in Vaca Muerta consolidated its role as the main source of gas supply in Argentina. According to official data published by the Argentine Secretariat of Energy and international energy agencies, production from the Neuquén Basin—driven primarily by Vaca Muerta—accounted for more than 60% of Argentina’s total natural gas output during the year, with national production reaching record levels during peak winter months. Average national gas production exceeded 120 MMm3/d toward the end of 2025, while maximum daily production surpassed historical records during the winter season.
The growth in gas production was supported both by continued development of shale gas resources and by a significant increase in associated gas volumes linked to the expansion of shale oil production in Vaca Muerta. International energy agencies have highlighted that Vaca Muerta currently explains more than 70% of Argentina’s natural gas production and has been instrumental in offsetting the natural decline of conventional gas fields.
The most significant operators in Vaca Muerta’s natural gas segment include YPF, Tecpetrol S.A., TotalEnergies and Pan American Energy. Fortín de Piedra, operated by Tecpetrol, remained the largest unconventional gas field in Argentina during 2025 and continued to play a central role in meeting domestic demand, particularly during periods of peak seasonal consumption.
The TGN system also accesses the Neuquén Basin. Of the transported natural gas coming from the Neuquén Basin, approximately 65% was transported by us and approximately 35% by TGN for the year ended December 31, 2025.
Undoubtedly, the biggest challenge in this Basin, given the potential of Vaca Muerta, is to develop the appropriate infrastructure for the transportation of natural gas. In this sense, in 2018 we have carried forward the construction of the Vaca Muerta Norte and Sur gas pipeline and the Tratayén conditioning plant with its subsequent expansions. In this sense, the beginning of the GPM works is particularly important. For additional information see “—The Argentine Natural Gas Industry” above.
Austral and San Jorge Basins. Natural gas provided by these basins, located in the southern region of Argentina, was transported mainly by us (Camuzzi Gas del Sur S.A. also transports natural gas through regional pipelines). In the Austral basin, exploration has centered in and around the basin’s existing natural gas fields and on other fields located offshore. The San Jorge basin is primarily an oil-producing basin.
Under the framework enacted by the Government to promote investments after the issuance of Decree No. 929/2013, in 2014, a joint operation was formed by Wintershall Energía S.A., Total Austral S.A. and Pan American Energy LLC Sucursal Argentina for the investment of US$1,000 million in off-shore gas fields (Vega Pleyade) located in the Tierra del Fuego region.
The governments of the provinces on which these basins are located, together with the Government, have taken several measures to develop nonconventional gas and off-shore sites. During May 2019, the Government granted exploration rights to 13 companies over three off-shore basins.
In addition, ENAP Sipetrol Argentina S.A., YPF and IEASA signed an agreement to explore and develop offshore fields in the continental shelf of Argentina, and on September 5, 2019, Secretary of Hydrocarbon Resources issued Resolutions No. 524 and 525, which granted an eight-year exploration permit on off-shore areas to Shell Argentina S.A. and QP Oil and Gas S.A.U.
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In 2022, Total Austral announced an investment of approximately US$700 million for the development of the offshore Fénix gas project, located off the coast of Tierra del Fuego. The project comprises the installation of a new offshore production platform and the construction of approximately 35 kilometers of subsea pipelines connecting the Fénix field to the existing Vega Pléyade platform, whose production has been in natural decline.
The Fénix project commenced production in September 2024 and reached its designed production capacity in early 2025, following the start‑up of its three horizontal wells. At plateau, the project produces approximately 10 million cubic meters of natural gas per day, representing around 8% of Argentina’s total natural gas production. The gas produced at Fénix is transported through the subsea pipeline system, treated at onshore facilities in Río Cullen and Cañadón Alfa, and injected into the national transportation system.
The development of the Fénix project has contributed to sustaining gas production levels in the Austral Basin and to reducing the need for liquefied natural gas imports during peak seasonal demand periods.
The map below illustrates the distribution of the gas basins in Argentina:
graphic

Regulatory Framework
Industry Structure. The legal framework for the transportation and distribution of natural gas in Argentina is comprised by the Natural Gas Law, Decree No. 1,738/92, other regulatory decrees (primarily Decree No. 2255/92, which includes the Basic Rules for Transportation Licenses and Regulations of the Transportation Services), the Pliego, the transfer agreements and the licenses of the newly privatized companies. The Hydrocarbons Law of Argentina regulates the midstream natural gas industry, under a competitive and partially deregulated system. The Public Emergency Law and related laws and regulations, which are no longer in effect, significantly altered the regulatory regime under which we operated since 2002. Notwithstanding this, in December 2019 the national congress passed the Solidarity Law that introduced certain modifications to the RTI concluded in March 2018 with the issuance of Decree No. 250/2018 by the Executive Branch. See “Item 3. Key Information—D. Risk Factors—Risks Relating to Our Business.”
Natural gas transportation and distribution companies operate in an “open access,” non-discriminatory environment under which producers and certain third parties, including distributors, are entitled to equal and open access to the transportation pipelines and distribution system in accordance with the Natural Gas Law, applicable regulations and the licenses of the privatized companies. In addition, a regime of concessions under the Hydrocarbons Law of Argentina is available to holders of exploitation concessions to transport their own natural gas production.
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The Natural Gas Law prohibits natural gas transportation companies (TGN and us) from also being merchants in natural gas. In addition, (i) natural gas producers, storage companies, distributors, and consumers who contract directly with producers may not own a controlling interest (as defined in the Natural Gas Law) in a transportation company; (ii) natural gas producers, storage companies and transporters may not own a controlling interest in a distribution company; and (iii) merchants in natural gas may not own a controlling interest in a transportation or distribution company.
Contracts between affiliated companies engaged in different stages in the natural gas industry must be approved by ENARGAS, which may reject these contracts if it determines that they were not entered into on an arm’s-length basis.
ENARGAS, which was established by the Natural Gas Law, is an autonomous entity responsible for enforcing the provisions of the Natural Gas Law, the applicable regulations and the licenses of the privatized companies. Under the provisions of the Natural Gas Law, ENARGAS is required to be governed by a board of directors composed of five full-time directors appointed by the Executive Branch subject to confirmation by the Argentine Congress. However, from 2004 to 2007, ENARGAS was governed by three directors who were not confirmed by the Argentine Congress, and, since 2007 until January 2018, ENARGAS has been administered by an intervention inspector appointed by the Executive Branch. On January 31, 2018, the Executive Branch appointed a President for ENARGAS for a five-year term, thereby concluding the intervention period. However, the Solidarity Law established a new intervention of ENARGAS. Thus, from March 17, 2020 to December 31, 2023, ENARGAS underwent intervention. On December 16, 2023, Decree No. 55/2023 was issued, declaring a state of emergency in the national energy sector until December 31, 2024. Among other provisions, this decree intervenes in ENARGAS from January 1, 2024, and instructs the Ministry of Energy to issue the necessary rules and procedures for the establishment of market prices for the public service of natural gas transportation. Decrees No. 1023/2024 and No. 370/2025 extended the state of emergency until July 9, 2025 and July 9, 2026, respectively.
ENARGAS has broad authority to regulate the operations of the transportation and distribution companies and has its own budget, which must be included in the Argentine national budget and submitted to the Argentine Congress for approval. ENARGAS is funded primarily by annual control and inspection fees that are levied on regulated entities in an amount equal to the approved budget allocated proportionately to each regulated entity based on its respective gross regulated revenues, excluding natural gas purchase and transportation costs in the case of distribution companies.
Since 2004, the Government adopted a series of measures to redistribute the effects of the crisis in the energy sector caused by the natural gas shortage. Most of the electrical power stations do not have firm gas supply agreements and have increasingly used imported natural gas or alternative fuels that are more expensive than natural gas produced in Argentina. For this reason, ENARGAS and the Federal Energy Bureau (currently, the Secretary of Hydrocarbon Resources) have issued a series of regulations aimed at averting a crisis in the internal system of natural gas supply.
The Executive Branch issued Decree No. 181/04, directing the Federal Energy Bureau to establish a system of priority pursuant to which power stations and natural gas distribution companies (for their residential clients) could receive natural gas in priority to other users, even those with firm transportation and firm gas supply contracts. On April 21, 2004, the former Ministry of Production and Federal Planning, Public Investment and Services issued Resolution No. 208/04 that ratified an agreement between the Federal Energy Bureau and natural gas producers to give effect to this new system.
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Under certain circumstances and pursuant to the terms of our License, when ENARGAS asks us to restrict the provision of natural gas to clients who hold firm transportation contracts, we are exposed to potential claims from, among others, our customers. Therefore, we have requested that in connection with these new procedures, ENARGAS submit to us written instructions for any such natural gas firm transportation service interruption request. However, in case ENARGAS does not submit such instruction in the way required by our petition and we do not comply with ENARGAS’s instructions, if any, in order to avoid future claims from our customers, Resolution No. 208/04 will require us to pay the price difference between natural gas and the alternative fuel used by power stations in order to offset the loss resulting from our failure to comply with the instructions.
On June 26, 2018, ENARGAS issued Resolution No. 124/2018 which sets modifications to the Dispatch Centers Internal Regulations that establishes the procedures for natural gas dispatch management, modifying the guidelines for the Dispatch Administration attached to the Transport and Distribution Service Regulations and allow full operability of free access with no discrimination and competitive environment, and alternatives which guarantee the quality and continuity of gas transport and distribution public service, avoiding the cyclical crisis which may affect the transport and distribution systems, seeking to maintain clients supply, by preventing service interruptions with an efficient management methodology.
Although the natural gas supply shortage did not create a bottleneck in the transportation capacity that prevented the system from meeting increasing demand since 2008, the Government continues to impose restrictions from time to time on the consumption of natural gas by certain customers that hold firm transportation contracts with us, in an effort to redirect and target the supply to the demand regarded as top priority, mainly residential users, CNG stations and industries connected to the distribution network. Such restrictions have affected direct shippers who have firm transportation contracts with us, as well as industries in different distribution areas of the country.
As of the date of this Annual Report, our compliance has not resulted in legal action initiated by any of our firm transportation clients which could have a significant adverse economic and financial effect on us. However, any legal action, if brought, could have a significant adverse economic and financial effect on us. See “Item 3. Key Information—D. Risk Factors.”
Our License. Our License authorizes us to provide the public service of natural gas transportation through the exclusive utilization of the southern natural gas transportation system. Our License does not grant us an exclusive right to transport natural gas in a specified geographical area, and licenses may be granted to others for the provision of gas transportation services in the same geographical area. TGN’s natural gas transportation system is operated under a license containing substantially similar terms to those described below and elsewhere herein.
Our License has been granted by the Executive Branch by Decree No. 2451/92 for an original period of 35 years, beginning on December 28, 1992. However, the Natural Gas Law provides that we may request ENARGAS to renew its License for an additional period of ten years. According to the Foundations Law, such 10-year period was extended to 20 years. ENARGAS must then evaluate the performance of tgs and raise a recommendation to the Executive Branch. At the end of the period of validity of the License, 35 or 45 years, as the case may be, the Natural Gas Law requires that a new tender be called for the granting of the license. As long as we have substantially complied with our obligations under the License, we have the option to match any offer made by a third party to the Executive Branch.
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In September 2023, we submitted a request to ENARGAS for a 10-year extension of the natural gas transportation License, which is set to expire in December 2027. On June 13, 2024, ENARGAS issued a technical and legal report indicating that we have broadly fulfilled our obligations regarding the License (the “License Report”). Based on the License Report and after a non-binding public hearing as required by Section 6 of the Natural Gas Law, ENARGAS controller may submit a recommendation to the Executive Branch, which, in turn, may issue a decree granting an extension of the License. The License Report allows ENARGAS controller, after the non-binding public hearing, held on October 21, 2024, to issue its recommendation report to be submitted to the Executive Branch. On July 24, 2025, the Executive Branch ratified the Memorandum of Agreement for the extension of our License, which was entered into between us and the Ministry of Economy on July 11, 2025, and pursuant to which the term of our license was extended for an additional period of 20 years from December 28, 2027.
Our License also places certain other rights and obligations on us relating to the services we provide, including:

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operating and safety standards;

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terms of service, including general service conditions, such as specifications regarding the quality of gas transported, major equipment requirements, invoicing and payment procedures, imbalances and penalties, and guidelines for dispatch management;

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contract requirements, including the basis for the provision of service, e.g., “firm” or “interruptible;”

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certain mandatory capital investments that must have been made within the first five years of the license term; and

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applicable rates based on the type of transportation service and the area serviced.
Our License establishes a system of penalties in the event of a breach of our obligations thereunder, including warnings, fines and revocation of our License. These penalties may be assessed by ENARGAS based, among other considerations, upon the severity of the breach or its effect on the public interest. Through Resolution No. 22/2018, ENARGAS adjusted the amounts of fines applicable in the event of a breach of obligations, which amount shall be updated on April of every year. On May 7, 2019, through Resolution No. 251/2019, ENARGAS updated the amounts of the fines up to Ps. 21.1 million.
Revocation of our License may only be declared by the Executive Branch upon the recommendation of ENARGAS. Our License specifies several grounds for revocation, including the following:

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repeated failure to comply with the obligations of our License and failure to remedy a significant breach of an obligation in accordance with specified procedures;

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total or partial interruption of the service for reasons attributable to us, affecting completely or partially transportation capacity during the periods stipulated in our License;
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sale, assignment or transfer of our essential assets or otherwise encumbering such assets without ENARGAS’s prior authorization, unless such encumbrances serve to finance expansions and improvements to the gas pipeline system;

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bankruptcy, dissolution or liquidation; and

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ceasing and abandoning the provision of the licensed service, attempting to assign or unilaterally transfer our License in full or in part without the prior authorization of ENARGAS, or giving up our License, other than in the cases permitted therein.
Our License also prohibits us from assuming debt of, or granting credit to, CIESA, and creating security interests in favor of, or granting any other benefit to, creditors of CIESA.
Generally, our License may not be amended without our consent. As part of the renegotiation of our License under the Public Emergency Law, however, the terms of our License may be changed or our License may be revoked. In addition, ENARGAS may alter the terms of service annexed to our License. If any such alteration were to have an economic effect on us, ENARGAS should modify our rates to compensate for such effect or we could request a change in the applicable rates.
Regulation of Transportation Rates—Actual Rates. The natural gas transportation rates established for each transportation company must be calculated in U.S. dollars and converted into pesos at the time of billing. However, the Public Emergency Law eliminated tariff indexing covenants based on U.S. dollar exchange rate fluctuations and established a conversion rate of one peso equal to one U.S. dollar for tariffs.
The rate for natural gas firm transportation services consists of a capacity reservation charge and is expressed as a maximum monthly charge based on the cubic meters per day of reserved transportation capacity. The rate for natural gas interruptible transportation service, which is expressed as a minimum (from which no discounts are permitted) and a maximum rate per cubic meter of natural gas transported, is equivalent to the unit rate of the reservation charge for the firm service based on a load factor of 100%. For both firm and interruptible transportation services, customers are obligated to provide a natural gas in-kind allowance, expressed as a maximum percentage of gas received, equivalent to the natural gas consumed or lost in rendering the transportation service. The rates for all services reflect the rate zone(s) traversed from the point of receipt to the point of delivery.
No tariff increases have been received between May 1, 2019, and February 28, 2022. On February 1, 2022, ENARGAS provided us with a proposal for a Transitional Renegotiation Agreement (“2022 Transition Agreement”), which was approved by our Board of Directors on February 2, 2022, and by the different governmental agencies on February 18, 2022. Such agreement was ratified by the Executive Branch through Decree No. 91/2022, effective as of February 23, 2022, which provides a transitional tariff increase of 60% as of March 1, 2022 (“RTT 2022”).
On February 25, 2022, ENARGAS issued Resolution No. 60/2022, which established that the new tariff charts contemplating the RTT 2022 would come into effect on March 1, 2022.
On March 16, 2023, our Board of Directors approved the proposed addendum to the renegotiation transitory agreement ( “2023 Transition Agreement”) sent by ENARGAS. The 2023 Transition Agreement was ratified by the Executive Branch through Decree No. 250/2023 on April 29, 2023. Previously, on April 27, 2023, ENARGAS issued Resolution No. 186/2023, through which the new applicable tariff schedules were published.
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In addition to transportation tariffs, we are entitled to collect a CAU, which applies to certain assets incorporated into the natural gas transportation system that were not financed by us. The CAU is intended to compensate for the operation and maintenance of such assets.
Since its inception in 2005, the CAU has been adjusted by ENARGAS on several occasions. Specifically, the CAU was increased by 73.2% effective May 1, 2015, and by 200.1% effective April 1, 2016. Subsequently, additional increases of 50.0% and 19.7% became effective on April 1, 2018 and October 1, 2018, respectively.
As part of the tariff adjustment processes applicable to natural gas transportation services, the CAU is subject to the same tariff adjustment mechanisms approved by the regulatory authority. Accordingly, the CAU receives the same tariff increases applicable to transportation tariffs, unless otherwise expressly provided in the relevant regulatory resolutions.
In 2025, we recognized revenues of Ps. 27,538 million related to the CAU. “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations.”
On March 13, 2026, the Secretariat of Energy issued Resolution No. 66/2026, pursuant to which it ordered a reconfiguration of the natural gas transportation system of Argentina with the purpose of adapting it to Argentina’s new production scheme, which is currently predominantly supplied by the Vaca Muerta formation.
These measures aim to optimize the use of the natural gas transportation system, ensure adequate supply and improve the system’s operational efficiency. In addition, Resolution No. 66/2026 instructs ENARGAS to adjust tariff schedules, service regulations and capacity allocation mechanisms, within the scope of its regulatory authority, while preserving as an essential condition that the required revenues determined under the five‑year tariff review remain unchanged.
In this context, through Resolution No. 346/2026, ENARGAS ordered the opening of a public consultation process regarding certain aspects contemplated in Resolution No. 66/2026. Among the matters subject to consultation were new percentages of retained gas consistent with the new transportation routes of distribution shippers and the recognition of the firm nature of certain ED services, among other aspects.
The public consultation period expired on April 7, 2026. Subsequently, on April 14, 2026, through Resolution No. 409/2026, ENARGAS declared the public consultation process concluded and instructed the licensed natural gas transportation companies to enter into new firm transportation agreements, in accordance with the guidelines set forth in Resolution No. 66/2026, providing that such agreements shall become effective as of May 1, 2026.
Tariff situation.
Background and Renegotiation Process
On January 6, 2002, the Argentine Congress enacted the Public Emergency Law, which introduced dramatic changes to Argentina’s economic model, empowering the Government to implement, among other things, additional monetary, financial and foreign exchange measures to overcome the economic crisis in the short-term and bringing to an end the regime established pursuant to the Argentine Convertibility Act, including the fixed parity of the U.S. dollar and the peso. Among others, the Public Emergency Law granted the Executive Branch the power to conduct a renegotiation of public utility contracts and the tariffs set therein. The Public Emergency Law expired on December 31, 2017.
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Between July 2003 and March 2018, the Company received a series of temporary tariff increases, all within the framework of the integral tariff renegotiation (Revisión Tarifaria Integral) (“RTI”) process initiated after the enactment of the Public Emergency Law.
On February 16, 2016, the Executive Branch issued Decree No. 367/2016 which repealed the previous regulations governing the renegotiation process of contracts and licenses for public works and services and transferring to each ministry the responsibility to renegotiate public service contracts. Decree No. 367/2016 also conditioned the finalization of the new tariff scheme provided in the respective integral renegotiation agreement approved by the Executive Branch to completion of the RTI and provided that transitional adjustment of prices and tariffs are necessary to ensure the continuity of the normal provision of services.
Under the framework of the agreement signed in February 2016 (the “2016 Transitional Agreement”), on March 31, 2016, ENARGAS issued Resolution No. 3724, which approved revised tariffs as of April 1, 2016, including the CAU, for the Natural Gas Transportation business segment, providing for a 200.1% increase. Additionally, among other things, Resolution No. 3724 required us to not distribute dividends without the prior authorization of ENARGAS after reviewing our compliance with the transitional mandatory investment plan included in the 2016 Transitional Agreement (the “2016 Investment Plan”). As of the date of this Annual Report, the 2016 Investment Plan is fully executed and has been approved by ENARGAS.
As several legal proceedings were initiated against Resolution No. 3724 in order to obtain the annulment of the increase of the PIST and the tariff increases for the natural gas transportation and distribution licensees approved by ENARGAS, we were not able to bill the 200.1% increase in full. On August 18, 2016, the Supreme Court order issued its final decision mandating the Government to (i) implement mandatory public hearings prior to the establishment of natural gas transportation and distribution tariffs, (ii) implement mandatory public hearings prior to the establishment of the point-of-injection gas price and (iii) declare the invalidity of Resolutions 28 and 31 with respect to residential users, for whom tariffs had to be returned to tariff rates effective as of March 31, 2016.
On August 19, 2016, ENARGAS issued Resolution No. 3953/2016, which implemented the decisions arising out of a public hearing before the Supreme Court. For additional information regarding the public hearing’s agenda, see “—Natural Gas Transportation—The Argentine Natural Gas Industry.”
As a result of this public hearing, since October 7, 2016, we were able to collect the revised tariffs at the levels provided for in Resolution No. 3724, allowing us to complete our 2016 Investment Plan.
Resolution 74 Tariff Increases
On March 30, 2017, we entered into the Integral Renegotiation Agreement (“2017 Integral Agreement”) and the related agreement signed on March 30, 2017, between us and the Government (“2017 Transitional Agreement”). On the same day and consistent with the 2017 Transitional Agreement, the Ministry of Energy enacted Resolution 74, which increased the price of the natural gas consumed by power plants starting on April 1, 2017, and ENARGAS issued Resolution 4362 by which a new transitional tariff schedule applicable to us determined a total tariff increase of 214.2% and 37%, on the tariff of the natural gas transportation service and the CAU, respectively. Pursuant to Resolution 4362, we were required to execute the five-year plan. In addition, Resolution 4362 contemplates a non-automatic semiannual adjustment mechanism for the natural gas transportation tariff and the CAU to reflect changes in WPI, which must be approved by ENARGAS evaluating the evolution of the economic circumstances.
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However, Resolution 74 provided for a limitation on the full effectiveness of the tariff increase arising from the RTI process until the approvals of the 2017 Integral Agreement were completed. This meant that the tariff increase was granted in three stages on April 1, 2017 (granted 64.2% increase in natural gas transportation and no increase in CAU), December 1, 2017 (granted 80.8% increase on natural gas transportation and 29,7% increase in CAU) and April 1, 2018 (granted 50% increase in natural gas transportation and CAU). This staged increase is structured to provide the same economic benefits to us as if the increases had been fully effective since April 1, 2018.
On March 27, 2018, through Decree 250, the Executive Branch ratified the 2017 Integral Agreement, following the approval of several governmental authorities, including the Argentine Congress. Decree 250 concluded the RTI process and terminated the 2017 Transitional Agreement, representing the final renegotiation of our License with the Government after 17 years of negotiations. As a result of the foregoing, (i) we were entitled to the final tariff increase contemplated in Resolution 4362, and (ii) we and our current and former shareholders withdrew any claim against the Government related to our business resulting from the Public Emergency Law on June 26, 2018.
On June 21, 2019, Secretary of Hydrocarbon Resources issued Resolution 336, through which the payment of 22% of the bills issued from July 1, 2019, to October 31, 2019, to residential customers of natural gas was deferred. Such deferral will be recovered through the bills issued from December 1, 2019, in five consecutive monthly installments. It is expected that the Government will compensate licensors for such deferral. On August 22, 2019, Secretary of Hydrocarbon Resources issued Resolution No. 488/2019, which established the procedure to calculate the deferral provided by Resolution 336. Furthermore, Resolution No. 488/2019 instructs the implementation of a procedure to calculate and pay the compensation for licensors.
Semiannual Adjustment of Tariffs. Under our License, we may be permitted to adjust tariffs semiannually to reflect changes in PPI and every five years in accordance with efficiency and investment factors to be determined by ENARGAS and, subject to ENARGAS’s approval, from time to time to reflect cost variations resulting from changes in the tax regulations (other than income tax) applicable to us, and for objective, justifiable and non-recurring circumstances.
The Natural Gas Law requires that in formulating the rules that apply to the setting of future tariffs, ENARGAS must provide the transportation companies with (i) an opportunity to collect revenues sufficient to recover all future proper operating costs reasonably applicable to service, as well as future taxes and depreciation, and (ii) a reasonable rate of return, determined in relation to the rate of return of businesses having comparable risk and taking into account the degree of efficiency achieved and the performance of the company in providing the service. No assurances can be given that the rules to be promulgated by ENARGAS will result in rates that will enable us to achieve specific levels of earnings in the future.
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However, since January 1, 2000, adjustments to tariffs to reflect PPI variations were suspended, first through an agreement with the Executive Branch and later by a court decision arising from a lawsuit to determine the legality of tariff adjustments through indexes.
Resolution 4362 provided for a semiannual adjustment mechanism based on changes in the WPI. The increase is not automatic, however, as it requires the prior approval of ENARGAS.
Within the renegotiation process, transitory adjustments of tariffs and/or their segmentation may be foreseen, as the case may be. Likewise, it must carry out the relevant and appropriate public hearing, public consultation and citizen participation regimes, as well as give intervention to the Procuración del Tesoro de la Nación and to the Sindicatura General de la Nación. Finally, the resulting agreement must have the corresponding governmental approvals. The renegotiation process culminates with the subscription of a final agreement on the RTI. In this sense, from this resolution, successive increases were approved under various agreements between the Company and ENARGAS, which, in certain cases, resulted in the initiation of legal actions by tgs.
On December 6, 2022, by means of Decree No. 815/2022, the term for the completion of the RTI established in Decree No. 1020 was extended for a period of 1 year as from its expiration, i.e., until December 18, 2023. It also extends, as from January 1, 2023, the intervention of ENARGAS, which is instructed, while the renegotiation continues, to carry out the necessary measures to achieve a transitional tariff adjustment in accordance with Decree No. 1020.
Within this framework, on December 7, 2022, ENARGAS issued Resolution 523 by which it called for a public hearing held on January 4, 2023, in order to consider a transitional tariff adjustment of the public natural gas transportation service. In said hearing, in which it was informed that the increase pending application, considering the lack of semiannual adjustments by WPI since April 2019 and the transitory increase granted of 60% as from March 2022, amounted to an estimated 270% as of December 2022, we requested a transitory tariff increase for the year 2023 of 135%, taking into account the current context the country is going through, aiming at the continuity, accessibility and normal provision of the public service of natural gas transportation, in safe conditions, trying to mitigate the economic and financial effects of the higher costs and current expenses associated to the service.
On March 15, 2023, ENARGAS submitted a proposal to us for an addendum to the RTI.
On March 16, 2023, our Board of Directors approved the 2023 Transition Agreement sent by ENARGAS. This addendum was subsequently ratified by PEN through Decree No. 250/2023 of April 29, 2023. Previously, on April 27, 2023, ENARGAS issued Resolution No. 186/2023 which published the new tariff tables in force.
The 2023 Transition Agreement has conditions similar to the 2022 Transition Agreement. The 2023 Transition Agreement includes:

•
As of April 29, 2023, a transitional tariff increase of 95% on the natural gas transportation tariff and the Access and Use Charge.

•
During its term, we may in no case distribute dividends or cancel in advance directly or indirectly financial and commercial debts contracted with shareholders, acquire other companies or grant credits (unless the credits benefit users or are granted to contractors who do not qualify as users). If we understand it is appropriate to distribute dividends, it must require authorization from the Ministry of Economy. For its part, in the event that we understand it is appropriate to cancel in advance directly or indirectly financial and commercial debts contracted with shareholders, acquire other companies or grant credits, it shall require authorization from ENARGAS.
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On December 14, 2023, through Resolution No. 704/2023, ENARGAS convened a public hearing scheduled for January 8, 2024. On February 9, 2024, ENARGAS issued Resolution No. 52/2024 which declared that the public hearing was declared valid.
Furthermore, tariffs were to be adjusted monthly, starting in May 2024 and until the completion of the five‑year tariff review process, based on an index composed of: (i) 47% Wage Index – Registered Private Sector (INDEC), (ii) 27.2% WPI, and (iii) 25.8% Construction Cost Index – Materials Chapter (INDEC). This agreement also removed the previous restriction on dividend payments.
During the months of May to July 2024, ENARGAS notified us that it would postpone the implementation of the monthly tariff adjustment. Likewise, it notified that it would replace the monthly adjustment methodology mentioned above for the remainder of 2024. According to ENARGAS notification, the monthly tariff increase would be based on the expected inflation to be estimated by the Ministry of Economy for said periods.
On July 1, ENARGAS once again informed us of the postponement of the monthly tariff increase, this time corresponding to the month of July, maintaining the tariff schedules in effect since April 3, 2024.
During 2024 and the completion of the five‑year tariff review process in the first quarter of 2025, the Company received tariff increases of 675%, 4%, 1%, 2.7%, 3.5%, 3%, 2.5%, 1.5% and 1.7%, effective from April 3, August 1, September 2, October 1, November 4, December 4, 2024 and January 1, February 1, and March 1, 2025, respectively.
In this regard, and within the framework of the five‑year tariff review process, on January 14, 2025, ENARGAS, through Resolution No. 16/2025, published the call for the public hearing held on February 6, 2025, with the purpose of considering, among other issues, the five‑year tariff review for gas transportation and distribution, and the periodic adjustment methodology for gas transportation and distribution tariffs.
At this hearing, we presented, among other aspects, its expenditure and investment plan for the five-year period 2025-2029, the capital base, and the proposed WACC (9.98% real after taxes). Considering the tariff calculation methodology and the mentioned parameters, a tariff increase of 22.7% was requested compared to the tariffs in effect as of January 2025. Additionally, alternatives for the periodic tariff adjustment methodology were presented:

•
WPI, or

•
A polynomial formula composed of information published by INDEC:

‒
30% WPI,

‒
40% total registered wage index, and

‒
30% construction cost index for materials.
On April 30, 2025, ENARGAS published Resolution No. 256/2025, which sets forth the conditions of the five‑year tariff review for the 2025–2030 period. The main aspects include:

•
Regulatory capital base: determined as of December 31, 2024.
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 		•
Discount rate (WACC): 7.18% real after taxes.

•
Initial tariff increase: weighted average of 3.67%, subsequently adjusted to 4.74% to be applied in 31 equal and consecutive monthly installments starting in May 2025.

•
Five-Year Investment Plan: totaling $279,107,575 (at June 2024 currency), subject to ENARGAS oversight.

•
Regulated operating expenses: defined for the 2025–2030 period.
The resolution also provides that the mechanism for periodic tariff adjustments will be based on a formula that equally combines the CPI and the WPI, both published by INDEC. However, the formal approval of this methodology was postponed.
Under Decree No. 371/2025, the Secretariat of Energy was designated as the enforcement authority to introduce contractual or tariff modifications. In line with this, on June 4, 2025, Resolution No. 241/2025 was issued, providing for the periodic update of transportation tariffs on a monthly basis (“Periodic Update”), replacing the previous semiannual scheme.
On June 5, 2025, we agreed to said resolution, and ENARGAS, through Resolution No. 350/2025, approved the methodology for calculating the periodic adjustment and the tariff schedules effective as from June 6, 2025, which incorporate a Periodic Update of 2.81% and the application of the five‑year tariff review increase.
On July 1, 2025, Resolution No. 421/2025 was published, granting a Periodic Update of 0.62% and the corresponding five‑year tariff review increase. On August 1, September 1, October 1, November 1, December 1, 2025 and January 1 and February 1, 2026, through Resolutions No. 539/2025, 622/2025, 732/2025, 812/2025, 907/2025, 1001/2025 and 32/2026 and a Periodic Update of 1.63%, 2.38%, 2.49%, 2.89%, 1.71%, 2.03% and 2.63%, respectively, was granted together with the corresponding five-year tariff review increase, effective as from those dates.
Certain Restrictions with Respect to Essential Assets. A substantial portion of the assets transferred by GdE were defined in our License as essential to the performance of the licensed natural gas transportation service. Pursuant to our License, we are required to segregate and maintain the essential assets, together with any future improvements thereon, in accordance with certain standards defined in our License.
We may not for any reason dispose of, encumber, lease, sublease or lend essential assets for purposes other than the provision of the licensed service without ENARGAS’s prior authorization. Any extensions or improvements that we make to the natural gas pipeline system may only be encumbered to secure loans that have a term of more than one year to finance such extensions or improvements.
Upon expiration of our License, we will be required to transfer to the Government or its designee the essential assets specified in our License as of the expiration date, free of any debt, encumbrance or attachment. If we decide not to participate in a new bidding for a new License term, we will receive compensation equal to the lower of the following two amounts:

•
the net book value of the essential assets determined on the basis of the price paid by CIESA for shares of our common stock plus the original cost of subsequent investments carried in U.S. dollars in each case adjusted by the PPI, net of accumulated depreciation in accordance with the calculation rules to be determined by ENARGAS (since the enactment of the Public Emergency Law, this provision may no longer be valid); or

•
the net proceeds of a new competitive bidding (“New Bidding”).
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Once the period of the extension of the License expires, we will be entitled to participate in the New Bidding, and, thus, we shall be entitled to:


•
submit a bid computed at an equal and not lower price than the appraisal value determined by an investment bank selected by ENARGAS, which represents the value of the business providing the licensed service at the valuation date, as a going concern and without regard to the debts;

•
match the best bid submitted by third parties in the New Bidding, if it would be higher than our bid mentioned above, paying the difference between both values to obtain a new license; and

•
if we have participated in the New Bidding but are unwilling to match the best bid made by a third party, receive the appraisal value as compensation for the transfer of the essential assets to the new licensee, with any excess paid by the third-party remaining for the grantor.
Under Argentine law, an Argentine court will not permit the enforcement of a judgment on any of our property located in Argentina which is determined by the courts to provide essential public services. This may adversely affect the ability of a creditor to realize a judgment against our assets.
Under a transfer agreement we entered into in connection with the privatization of GdE in the 1990s (the “Transfer Agreement”), liabilities for damages caused by or arising from the GdE assets are allocated to either GdE or us depending on whether any such damage arose or arises from the operation of the assets prior to or following the commencement of our operations. Also, pursuant to the Transfer Agreement, we are responsible for any defects in title to such assets, although any such defects are not expected to be material. The Transfer Agreement further provided that GdE was responsible for five years until December 1997 for the registration of easements related to the system, which were not properly recorded, and for the payment to property owners of any royalties or fees in respect thereof. Since 1998, we have been responsible for properly recording any remaining easement agreements and for making payments of royalties or fees related to such easements.
Environment
Environmental matters of the natural gas transportation business are governed by Argentine natural gas rule 153 issued by ENARGAS, which sets the guidelines for the implementation of an environmental management system and for the obligation to evaluate the environmental impact of projects.
Our business activities primarily have an impact on the atmosphere (as a result of methane release and combustion gases), the soil and watercourses due to the pipelines (including maintenance, third parties’ actions or failures). Our activities also generate hazardous waste and environmental noise. Further, we may be required to handle universal archeological or paleontological findings during works. All these aspects are monitored and measured under our comprehensive environmental program. We also conduct an annual emergency drill program to test our response capacity under safety and environmental emergencies, the 2021 drill was completed with satisfactory results. Our policy also extends to our contractors, who are required to comply with the same standards and implement environmental protection measures for the execution of each work.
See “Item 4. Our Information—D. Property, Plant and Equipment—Environmental, Social and Governance.”
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Competition
Our Natural Gas Transportation business provides an essential public service in Argentina in accordance with Article No. 1 of the Natural Gas Law. Although there are no regulatory limitations on entry into the business of providing natural gas transportation services in Argentina, the construction of a competing pipeline system would require substantial capital investment and the approval of ENARGAS. Moreover, as a practical matter, a direct competitor would have to enter into agreements with natural gas distribution companies or end-users to transport a sufficient quantity of natural gas to justify the capital investment. The building and operation of a natural gas pipeline requires important technical know-how and high investment levels.
Currently, demand for natural gas transportation exceeds available capacity in certain segments of the system. However, as supply and transportation capacity become more balanced, we could face increased competitive scenarios with TGN, particularly based on tariff differentials.
In addition, tariffs applicable to natural gas transportation services are regulated and approved by ENARGAS in accordance with the Natural Gas Law and the applicable regulatory framework. As a result, competition in the natural gas transportation segment is not primarily driven by price flexibility, but rather by available capacity, service conditions, system reliability and access to supply and demand centers. Regulatory constraints on tariff adjustments may limit our ability to respond to competitive pressures solely through pricing mechanisms.
The ability of new entrants to successfully penetrate our market would depend on a favorable regulatory environment, an increasing and unsatisfied demand for natural gas by end-users, sufficient investment in downstream facilities to accommodate increased delivery capacity from the natural gas transportation systems and the finding of significant natural gas reserves. Given the potential of Vaca Muerta’s non-conventional gas formation, other competitors, new market participants or even us in association with third parties may become interested in participating in the construction of new similar projects that could have an impact on our competitive position and on our financial situation and future results of operations.
To a limited extent, we compete with TGN on a day-to-day basis for natural gas interruptible transportation services and, from time to time for new natural gas firm transportation services made available as a result of expansion projects to the natural gas distribution companies to whom both we and TGN are either directly or indirectly connected (Camuzzi Gas Pampeana S.A., Metrogas S.A. and Naturgy Argentina S.A.). We compete directly with TGN for the transportation of natural gas from the Neuquén Basin to the greater Buenos Aires area.
Additionally, we face indirect competition from gas marketers, who purchase remaining gas transportation capacity to resell it. As gas marketers resell the remaining capacity to third parties at a lower price, greater efficiency in system utilization and a higher load factor could be achieved. We could have idle transportation capacity that industrial customers do not need to contract on a firm basis because they can purchase this capacity at the lower interruptible transportation tariff.
In the long term, demand for natural gas transportation services may also be affected by the relative cost of natural gas compared to alternative energy sources. Based on energy content, the delivered cost of natural gas to end‑users in Argentina remains significantly lower than that of most alternative fuels, with the exception of hydroelectric power.
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The Argentine Government has implemented a series of policies and infrastructure initiatives aimed at promoting the exploration and development of new natural gas reserves and strengthening the transportation system. Through Resolution No. 1036/2021, the Secretariat of Energy approved the Guidelines for an Energy Transition Plan to 2030, which establish strategic objectives for the Argentine energy matrix, including energy efficiency, lower greenhouse gas emissions, gasification, resilience of the energy system, regional integration and the development of new energy technologies.
Within this framework, on February 11, 2022, Resolution 67 was published, which created the Transport.Ar Program whose main purpose is to promote the development and growth of natural gas production and supply.
The Transport.Ar Program includes, among other projects, the construction of the GPM, the Mercedes–Cardales pipeline, expansions of the NEUBA II pipeline through loops and compression, the reversal of the Northern Gas Pipeline, expansions of the Central‑West Gas Pipeline, and capacity expansions in the final sections of the gas transportation system serving the Buenos Aires Metropolitan Area.
Additional projects contemplated for subsequent stages include expansions of the Northeast Argentina Gas Pipeline (Gasoducto del Noreste Argentino) (“GNEA”) through compression, new interconnections within the northeastern region, additional looping and compression works in the Entrerriano Gas Pipeline, expansions of the General San Martín Gas Pipeline and the execution of Stage III of the GNEA in the Provinces of Corrientes and Misiones.
By Decree No. 76/2022, the transportation concession for the GPM was granted to IEASA for a term of 35 years, and the FONDESGAS trust was created, with IEASA as trustee and beneficiary and Banco de Inversión y Comercio Exterior S.A. as trustee. The first stage of the GPM connects Tratayén, in the Province of Neuquén, with Salliqueló, in the Province of Buenos Aires, where it is interconnected with our gas transportation system. A second stage contemplates the extension of the pipeline to San Jerónimo, in the Province of Santa Fe.
Notwithstanding, on June 19, 2024, we submitted the private initiative proposal which seeks to replace natural gas and liquid imports each winter by using existing infrastructure, complementing the construction of Stage 2 of the GPM.
The project was declared of national public interest and authorized for bidding by ENARSA. On May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, which was awarded to us and approved by the Secretariat of Energy on October 17, 2025. In addition, we committed to execute complementary expansion works in the final sections of our licensed transportation system, which are necessary to achieve the project’s objectives. The works are scheduled to be completed by April 30, 2027.
The project will be developed under the RIGI and involves an estimated investment of approximately US$560 million.
In addition, the Government has implemented a number of projects to encourage the exploration and development of new natural gas reserves, or secure alternative supplies of natural gas, in recent years. See “—Natural Gas Transportation—The Argentine Natural Gas Industry.” For example, the Northeast pipeline is a project, led by the Government, which will connect the Bolivian natural gas basins with the northeastern region of Argentina and the greater Buenos Aires region. In recent years, the Government has carried out, albeit with some delays, the development of the expansion works.
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LIQUIDS PRODUCTION AND COMMERCIALIZATION
Our Liquids Production and Commercialization activities are conducted at our Cerri Complex, which is located near the city of Bahía Blanca in the Province of Buenos Aires. At the Cerri Complex, ethane, LPG and natural gasoline are extracted from natural gas, which arrives through our three main pipelines from the Neuquina, San Jorge Gulf and Austral natural gas basins.
We own the Liquids obtained at our Cerri Complex. We purchase natural gas in order to replace thermal units consumed in the Liquids production process. These natural gas purchases are negotiated with certain natural gas distributors, traders and producers. The results of our Liquids Production and Commercialization segment are subject to risks associated with commodity price fluctuations.
During 2025, 2024 and 2023, all of our Liquid sales were conducted on our own account. Sales of Liquids in the domestic market are regulated through the Households with Bottles Program (as defined below) of the Ministry of Energy, which aims to guarantee the supply at reasonable prices. For more information, see “—Regulation—Domestic market” below.
Liquids production in 2025 totaled 1,095,813 tons, representing an increase of 44,159 tons or 4.2% compared to 2024. During 2025, there were no production restrictions resulting from natural gas interruptions requested by governmental authorities.
With respect the volume of processing gas at the Cerri Complex, there was a slight decrease compared to 2024. In addition, gas volumes arriving through the San Martín pipeline continued to decline despite the start up of production from the Fénix project, thereby increasing the relative importance of gas supplied from the Neuquén Basin.
In 2025, we were the second-largest ethane producer in Argentina, behind MEGA, and our market share increased to more than 40% of the total ethane production in the country. The graphs below illustrate our share of total propane and butane production in Argentina during 2025:
graphic
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During 2025, propane and butane deliveries to the export market were conducted on a spot basis, allowing us to capture opportunities across different market niches and resulting in a significant increase in fixed premiums per transaction. We also continued strengthening our position in the Brazilian market by maintaining direct maritime exports (without intermediaries) to Brazilian LPG distributors.
With respect to natural gasoline exports, during 2025 these volumes were commercialized under a contract entered into with Trafigura Pte Ltd. at international prices less a discount. This contract, which covered the period from March 2024 through February 2026, improved the conditions of the agreement that was in effect until February 2024. Subsequently, we entered into a new agreement with ATMI (subsidiary of Total Energies) for the period from March 2026 to February 2028, further improving the contractual conditions applicable in 2025.
For additional information regarding Liquids price evolution during the years 2025 and 2024, see “Item 5. Operating and Financial Review and Prospects—A. Operating Results.”
Truck exports to neighbouring countries also increased. We operate under this modality with Paraguay and Brazil. Although export volumes by truck are significantly lower than those shipped by sea, these operations allow us to achieve higher profit margin.
In 2025, we continued commercializing LPG by land, dispatching approximately 11,402 trucks (303,106 tons) loaded with our own product, compared to 14,389 trucks (331,751 tons) dispatched in 2024. These truck dispatches, which are primarily intended to meet the domestic demand, also enable exports to neighboring countries. While volumes are lower than maritime exports, they generate operating margins and contribute to the expansion of our clients’ portfolio.
All of our ethane production is sold to PBB under a long-term agreement executed on September 6, 2018, which expires on December 27,2027. This agreement includes, among other conditions, TOP and DOP commitments for minimum annual quantities, which are lower than the TOP volumes established under 2015 ethane agreement with PBB. If either party fails to comply with the applicable TOP or DOP commitments, such party is required to compensate the other for the breach of the minimum annual quantity obligations. Pursuant to the current contract, in the event of a default by PBB with respect to its TOP commitments, PBB is required to compensate us. The Liquids Production and Commercialization segment also includes storage and truck dispatch of liquids extracted at the Cerri Complex to facilities located in Puerto Galván. LPG and natural gasoline are transported through two eight-inch pipelines to the loading terminal at Puerto Galván. Ethane is transported via an eight-inch pipeline to the PBB plant, which is the sole outlet for ethane produced at the Cerri Complex. Any ethane that cannot be sold to PBB is reinjected into the pipeline.
Over the past several years, the Liquids Production and Commercialization segment has provided us a stable source of cash generation, supported by a diversified product mix, flexible commercialization strategies and efficient use of existing infrastructure. This segment has demonstrated a high degree of operational efficiency and resilience, enabling us to sustain production levels, fulfill contractual commitments and capture export opportunities. This performance was achieved despite the significant climate-related event that affected the Cerri Complex, underscoring the robustness of our facilities, logistics and commercial capabilities, as well as the effectiveness of our operational and contingency management practices.
In 2025, our export revenues from the Liquids Production and Commercialization segment were Ps. 292,674 million, representing 17.0% of our total revenues and 45.3% of segment revenues. The total liquids sales volume reached 1,076,729 tons, of which 438,327 tons corresponded to export sales, representing 40.7% of total liquids sales volume.
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The annual sales of our Cerri Complex for 2025, 2024 and 2023 in tons were as follows:
  
2025
  
2024
  
2023
 
Ethane
  
334,596
   
309,894
   
394,370
 
Propane
  
383,622
   
393,669
   
369,683
 
Butane
  
260,051
   
266,123
   
235,861
 
Natural Gasoline
  
98,460
   
107,664
   
129,272
 
Total
  
1,076,729
   
1,077,350
   
1,129,186
 
We anticipate that new oil and natural gas developments in Argentina will provide new opportunities in the Liquids Production and Commercialization business and lead to related increases in revenues from our Natural Gas Transportation and Liquids Production and Commercialization businesses.
Regulation
Liquids Production and Commercialization activities are not subject to regulation by ENARGAS. However, in recent years, the Government has enacted regulations that have significantly affected our Liquids production activities.
Domestic market
Producers of LPG are required to prioritize the supply of the domestic market before exporting significant volumes. As a result, we may be required to forego sales to foreign markets where prices for certain products are higher than those applicable in the Argentine domestic market.
On April 1, 2005, Law No. 26,020 was enacted, establishing the regulatory framework for the LPG industry and its commercialization. Under this regime, the Secretariat of Energy is authorized to adopt measures to ensure domestic supply, including the determination of minimum volumes to be allocated to the local market and the establishment of reference prices for LPG sold domestically.
Since 2015, the “Households with Bottles Program” (Plan Hogar) has been in force. This program establishes maximum reference prices and mandatory supply quotas for LPG producers in order to guarantee access to LPG for low-income residential users. The compensation mechanism originally provided to producers participating in the program was eliminated in February 2019.
During 2024, within the framework of the Households with Bottles Program, maximum reference prices continued to apply, requiring producers to supply LPG at regulated prices and within defined quotas. During 2025, regulated prices increased cumulatively by 41.42% between December 31, 2024 and December 31, 2025, reaching Ps. 593,952 per ton at year-end.
On January 24, 2025, the Secretariat of Energy issued Resolution No. 15/2025, effective as of that date, which (i) eliminated the maximum sale prices applicable under the Households with Bottles Program, (ii) mantained the LPG export parity price published by the Secretariat of Energy pursuant to Law No. 26,020 as the applicable price cap, and (iii) maintained the obligation for LPG producers to supply the domestic market while eliminating previously required product contribution mechanisms. As a result, prices under the Households with Bottles Program were liberalized within the export parity price limit, while domestic supply obligations remained in effect.
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In addition, we participate in the Propane Gas Supply Agreement for Undiluted Propane Gas Distribution Networks (the “Propane for Networks Agreement”) entered into with the Argentine Government and propane producers. Pursuant to this agreement, we are required to supply propane to distributors and sub-distributors at prices below market levels. Under this framework, we receive economic compensation calculated as the difference between the agreed domestic sales price and the export parity price determined by the Secretariat of Energy. The timing and effectiveness of such compensation mechanisms depend on administrative and fiscal processes implemented by the Argentine authorities.
The Propane for Networks Agreement has been extended on several occasions. The agreement in force until December 31, 2023 was executed on August 18, 2023 and ratified by Decree No. 496/2023 dated October 2, 2023. During most of 2024, propane deliveries continued to be made under its terms following instructions from the Secretariat of Energy. On November 6, 2024, we entered into a new Propane for Networks Agreement valid until December 31, 2024, which was subsequently ratified by Decree No. 183/2025 dated March 12, 2025.
On January 31, 2025, through Note No. NO‑2025‑11082035‑APN‑DGL#MEC, the Secretariat of Energy instructed us to continue supplying undiluted propane to the domestic market until a new Propane for Networks Agreement entered into effect. The framework governing such supplies was further extended by Decree No. 970/2025. On March 27, 2024, the Secretariat of Energy updated the price applicable to undiluted propane deliveries, setting it at 25% of the export parity price published by the Secretariat of Energy, effective upon the approval of new distribution tariffs by ENARGAS, which were published in the Official Gazette on April 3, 2024.
The Government compensates us for our participation in the Propane for Networks Agreement, through fiscal credit certificates which may be applied to the payments of export duties. As of December 31, 2025, the Argentine State owed us Ps. 12,720 million in connection with this program. The recovery of these amounts and their application against export duties may be subject to timing differences and administrative procedures.
For more information see “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Liquids Production and Commercialization Segment.”
International Market
In the international market, we commercialize propane, butane and natural gasoline to international traders and other clients.
On September 4, 2018, pursuant to Decree No. 793/2018 (as subsequently amended by National Executive Branch Decree No. 865/2018, the effectiveness of which was ratified by Law No. 27,467), the National Executive Branch established a 12% export duty on all goods included in the MERCOSUR Common Customs Nomenclature, subject to a cap of Ps. 4 per U.S. dollar for the products exported by us. This cap was eliminated on December 16, 2019, pursuant to Decree No. 37/2019.
Through Law No. 27,541, the Executive Branch was empowered to set export duties until December 31, 2021, provided that such duties did not exceed 33% of the taxable value of the exported goods. With respect to hydrocarbons, such law established that export duties could not exceed 8% of the taxable value.
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On May 19, 2020, the Government issued Decree No. 488/2020 pursuant to which, among others, the price per barrel of crude oil in the local market was fixed at US$45 until December 31, 2020. This measure was subject to review if the ICE Brent first line price exceeds US$45 / bbl for 10 consecutive days. Decree No. 488/2020 also introduced modifications to the tax regime applicable to domestic fuel consumption and export duties.
During the fiscal year ended December 31, 2025, the average export duty rate applicable to our products was 7.41%.
Environment
In addition to this sector-specific regulation, we are subject to environmental legislation enacted by each of the seven provinces through our high-pressure trunk gas pipeline system runs.
Our production and liquid storage facilities are subject to Law No. 11,459 on industrial establishment of Buenos Aires. We are also required to comply with all applicable provincial environmental legislation, including regulations governing gas emissions, waste disposal, the use of public waters and the discharge of effluents, among others. Both the Cerri Complex and the Puerto Galván facilities hold valid environmental certificates.
See “Item 4. Our Information—D. Property, Plant and Equipment—Environmental, Social and Governance.”
Competition
The construction and operation of natural gas processing plants located in the Province of Neuquén have represented a source of competition for our Liquids business, as our customers may satisfy their demand through alternative suppliers. In the past, this competition was mitigated through agreements entered into with natural gas producers that limited their ability to make investments in natural gas processing facilities.
For example, at the end of 2000, MEGA completed construction and commenced operations of a gas processing plant with a capacity of approximately 1.3 Bcf/d, located in the Province of Neuquén. Although the construction of this gas processing plant initially resulted in lower volumes of gas arriving at the Cerri Complex, we implemented measures to substantially mitigate the related adverse effects. However, there is a risk that additional gas processing at the MEGA plant could result in lower volumes or lower quality gas (i.e., gas with lower liquids content) arriving at the Cerri Complex in the future. In addition, other upstream projects that may be developed could adversely affect our revenues from Liquids production and commercialization services.
In the past, our sole purchaser of ethane, PBB, elected for commercial reasons to prioritize ethane supplied by MEGA. If PBB continues to increase its purchases of ethane from competitors, our revenues from Liquids production and commercialization services could be adversely affected if we are unable to sell excess ethane and are required to reinject it into the gas stream.
To ensure access to unprocessed natural gas at Cerri Complex, we previously obtained commitments from certain  natural gas producers  not to construct natural gas processing plants upstream of the Cerri Complex during the term of long-term agreements. As these agreements expired, we renew or entered into new contracts  to replace them. More recent agreements have shorter terms. However, all current agreements include commitments by such producers not to reduce the quality of the natural gas supplied to us. Notwithstanding these commitments, any changes in the methodology used by producers to inject natural gas into the pipeline system could result in the receipt of lower quality gas, thereby reducing the volume of liquids available for extraction and processing in the Cerri Complex.
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MIDSTREAM
Other business activities are not subject to regulation by ENARGAS.
Midstream Services
Under our Midstream business segment, we provide midstream integral solutions related to natural gas production, from the wellhead up to the transportation systems. The services comprise gas gathering, compression and treatment, as well as construction, operation and maintenance of plants and pipelines, which are generally rendered to natural gas and oil producers at the wellhead. Our portfolio of midstream customers also includes distribution companies, big industrial users, power plants and refineries. Our midstream activities also include the separation and removal of impurities such as water, carbon dioxide and sulfur from the natural gas stream, and steam generation for electricity production. Small diameter pipes from the wellheads form a network, or gathering system, carrying the gas stream to larger pipelines where field compression is sometimes needed to inject the gas into our large diameter gas pipelines. The services are tailored to fit the particular needs of each customer in technical, economic and financial matters.
This business segment includes the transportation and all related services provided in Vaca Muerta after the important gas pipe project carried out during 2019 which allow us to comply with the agreements signed with the main natural gas producers in the area.
In addition, we provide operation and maintenance of pipelines services to our affiliate Gas Link S.A. (“Link”).
Furthermore, we aim to have a leading role in the development of Argentina’s energy sector. For this reason, we developed a gas gathering network in the Southern Section and Northern Section in the Vaca Muerta fields. To make these investments viable, we executed agreements with various natural gas producers and contracted natural gas treatment services for a period of 10 years.
The construction of a catchment and gathering pipeline and a natural gas conditioning plant in the Vaca Muerta field allows us to gather non-conventional gas from the Neuquén Basin and subsequently inject it into the main gas pipeline systems, ensuring its supply to all of Argentina’s regions. This project means a significant improvement in our role in the natural gas development of Argentina and is part of our growth strategy.
The total original investment in both the Northern Section and the Southern Section of the pipeline gathering system and the natural gas conditioning plant located at the ending point of both sections was US$260 million. The 91 miles gathering pipeline formed by the Northern and Southern Sections gather and transport the natural gas production of several hydrocarbon areas within the Vaca Muerta play. The natural gas pipelines have a total transportation capacity of 60 MMm3/d and the conditioning plant (called Tratayén Plant), originally had a capacity of 6 MMm3/d of natural gas.
As a consequence of the increase in natural gas production levels registered in the Neuquén basin, we have recorded increasing levels of utilization of our midstream facilities; this is mainly evident in the Vaca Muerta system, which started 2021 gathering and treating flows of around 3.5 MMm3/d at the Tratayén Plant and ended year 2024 with flows of around 28 MMm3/d. To cope with this flow growth several expansion projects were carried out at the Tratayén Plant:
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In year 2020 the first expansion project was approved, increasing the plant total gas conditioning capacity up to 7.7 MM m3/d. These works, completed in September 2021, involved the installation of a new slug catcher and a new stabilizing column.

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In year 2021 the installation of two Joule Thomson gas conditioning plants was approved. These works, finalized in 2023, increased total gas conditioning capacity to 14.5 MM m3/d. This project involved an estimated investment of US$32 million.

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The third expansion stage, finished in October 2024 and February 2025, consisted of the installation of two gas processing plants (6.6 MMm3/d capacity each, cryogenic technology in both cases). These two plants are operated in gas conditioning mode until conditions make possible to develop a gas processing project in Tratayén Plant. With the addition of these plants the total gas condition capacity will grow up to 28 MM m3/d. Total estimated investment for this expansion is US$360 million.
This project will continue to improve the profitability of the investment made by us and generate business opportunities by providing security in the evacuation of natural gas volumes, such as the ones committed by producers under the Plan Gas.Ar.
Additionally, in August 2023 the construction work to extend the gas pipeline gathering network of the Vaca Muerta system was completed. With an investment of approximately US$ 60 million, this 32 kms long pipeline extends from the Los Toldos I Sur area to El Trapial (Vaca Muerta Northern Section); the commissioning of this pipeline enables the current configuration of our intake system, with a total length of 183 km.
This effort was accompanied by the negotiation and closing of new service contracts (transportation and conditioning) with Tecpetrol, Pluspetrol, Vista, YPF, Pampa Energía and Chevron.
Plaza Huincul operations matched our forecasts in terms of incoming gas flows and financial performance. We don´t foresee substantial growth opportunities for this plant in the near future.
We have been providing all these services for a long time and, in view of the growth in these services demand, they have been grouped into a business line with its own title to enhance its development in the market. Consequently, in 2023, we launched our INTEGRA program.
INTEGRA groups all the services that we offer to the market based on the human resources and tools with which it supports the management of its own assets: from the execution of minor works and pipeline repair works to laboratory works such as meter calibration and analysis of hydrocarbon samples, including the operation and maintenance of pipelines and plants, project management, pipeline integrity studies, etc. We also have in-house facilities for turbomachinery overhaul services.
They also reinforce our commitment to Argentina’s energy development and our strategy of making the investments made in the installation of the Vaca Muerta gas pipeline system profitable. In this sense, we continue in conversations with the different producers in the basin in order to capture business opportunities that will allow us to increase our portfolio of services and client portfolio.
We have entered into an UT with SACDE for the purpose of participating jointly in the National Public Bid No. 452-0004-LPU17: Assembly of Pipes for the Construction of the Project “Expansion of the Natural Gas Transportation and Distribution System.” As a result of this bid, the Ministry of Mines and Energy awarded to the aforementioned UT the contract for the construction of the Regional II-Recreo/Rafaela/Sunchales Regional Gas Pipeline. As of the date of issuance of this Annual Report, construction works are in progress.
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On June 19, 2024, we submitted the private initiative proposal which seeks to replace natural gas and liquid imports each winter by using existing infrastructure, complementing the construction of Stage 2 of the GPM. This project aims to increase the natural gas transportation capacity by 14 MMm³/d. The awarded party will be granted the exclusive right to use such capacity for a period of 15 years, including the operation and maintenance of the pipeline and complementary infrastructure. The project was declared of national public interest and authorized for bidding by ENARSA. On May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, which was awarded to us and approved by the Secretariat of Energy on October 17, 2025. This initiative involves an estimated investment of US$ 560 million by us and has been declared of public interest, as it supports the growth of natural gas transportation capacity from Vaca Muerta.
Telcosur (Telecommunications System)
We own 99.98% of Telcosur, a telecommunications company created in September 1998 to provide value-added and data transportation services using our modern digital land radio telecommunications system with Synchronous Digital Hierarchy technology (which was installed for purposes relating to our gas transportation system).
With respect to the telecommunications services provided by Telcosur, during the year 2024, agreements were reached that allowed increasing the capacity sold and consolidating the Company’s operations.
In line with the strategy of consolidating the business in the medium and long-term, Telcosur reached agreements with new customers and was able to expand or renew existing agreements. Telcosur’s strategy is focused on being a service provider in Vaca Muerta, taking advantage of its infrastructure and know-how in the industry. It is in this sense that among its main clients are the main oil and gas producers in the area as well as other telecommunications companies that provide services to them.
New technologies
Progress was made with “IoT” radio bases to expand Telcosur’s portfolio of services provided to its customers. Augmented reality and drone services were added to Telcosur’s service portfolio, making progress with the development of digital twins for antenna support masts and an innovative system for monitoring the verticalization of antenna support structures. A predictive system for monitoring data networks was implemented, which allowed Telcosur to advance in the early detection of network events and to act proactively to benefit customer service.
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C. Organizational Structure
The following is a summary diagram of our subsidiary (Telcosur) and affiliates as of December 31, 2025, including information about ownership and location:
 graphic
D. Property, Plant and Equipment
Gas Transportation
The principal components of the pipeline system we operate are as follows:
Pipelines. We render natural gas transportation service through a pipeline system that is 5,746 miles long, of which 4,768 miles operated under the License on an exclusive basis. We manage the transportation of natural gas over the remainder of the system under management agreements with the Gas Trust, which owns the remaining portions of the pipeline. The system consists primarily of large diameter, high-pressure pipelines intended for the transportation of large volumes of gas at a pressure of approximately 853-996 pound/square inch. Line valves are installed on the pipeline at regular intervals, permitting sections of the pipeline to be isolated for maintenance and repair work. Gas flow regulating and measurement facilities are also located at various points on the system to regulate gas pressures and volumes. In addition, a cathodic protection system has been installed to protect the pipeline from corrosion and significantly reduce metal loss. All of the pipelines are located underground or underwater.
Maintenance bases. Maintenance bases are located adjacent to the natural gas pipeline system in order to maintain the pipeline and related surface facilities and to handle any emergency situations which may arise. Personnel at these bases periodically examine the pipelines to verify their condition and inspect and lubricate pipeline valves. Personnel at the bases also carry out a cathodic protection system to ensure that adequate anti-corrosion systems are in place and functioning properly. Such performance also maintains and verifies the accuracy of our measurement instruments to ensure that these are functioning within appropriate industry standards and in accordance with the specifications contained in our service regulations.
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Compressor plants. Compressor plants along the pipelines recompress the natural gas volumes transported in order to restore pressure to optimal operational levels, thereby ensuring maximum use of capacity as well as efficient and safe delivery. Compressor plants are spaced along the pipelines at various points (between 62 and 124 miles) depending upon certain technical characteristics of the pipelines and the required pressure for transport. Compressor plants include mainly turbine-driven compressors and, to a lesser extent, motor-driven compressors which use natural gas as fuel, together with electric power generators to supply the complementary electrical equipment (control and measurement devices, pumping, lighting, communications equipment, etc.).
We transport natural gas through four major pipeline segments: General San Martín, Neuba I Gas Pipeline, Neuba II Gas Pipeline and Loop Sur Gas Pipeline, as well as several smaller natural gas pipelines. Information with respect to certain aspects of our main natural gas pipelines as of December 31, 2025, is set out in the table below:
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Major Pipeline
 
Length
(miles)
  
Diameter
(inches)
  
Maximum
Pressure
(pound/inch)
  
Compressor
Units
  
Operative
Compressor
Plants
  
HP
Output
 
General San Martín
  
2,853
   
24/30
   
853/995
   
59
   
17
   
512,800
 
Neuba I/Loop Sur..
  
732
   
24/30
   
853
   
14
   
5
   
57,800
 
Neuba II
  
1,235
   
30/36
   
975/995
   
21
   
7
   
194,000
 
Other (1)
  
926
  
Various
  
Various
   
6
   
3
   
7,500
 
Total
  
5,746
           
100
   
32
   
772,100
 
(1)
Includes 247 miles of transfer pipelines throughout the pipeline system, as well as the Cordillerano pipeline, with a length of 274 miles, and the Chelforó-Conesa pipeline and other minor pipelines.
General San Martín. This pipeline was built in three stages, completed in 1965, 1973 and 1978, and transports natural gas from the extreme southern portion of Argentina to the greater Buenos Aires area in east-central Argentina. It originates in San Sebastián (Tierra del Fuego), passes through the Strait of Magellan and the Provinces of Santa Cruz, Chubut, Río Negro and Buenos Aires (including the Cerri Complex located near the city of Bahía Blanca in central Argentina), and terminates at the high pressure transmission ring around the City of Buenos Aires. The pipeline receives natural gas from the Austral basin at the extreme south in the Province of Tierra del Fuego, from the same basin further north at El Cóndor and Cerro Redondo, in the Province of Santa Cruz and from the San Jorge basin in the northern Santa Cruz and southern Chubut Provinces. The natural gas pipeline primarily serves the districts and cities of Buenos Aires, La Plata, Mar del Plata, Bahía Blanca, Puerto Madryn and Comodoro Rivadavia. This pipeline was expanded in 2005 by the Gas Trust in order to satisfy the growing natural gas demand in the Argentine economy. This expansion resulted in the construction of 458 miles of pipeline and the installation of new compressor units. See “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations.”
Neuba I Gas Pipeline(Sierra Barrosa-Bahía Blanca). Neuba I Gas Pipeline was built in 1970 and was expanded by us in 1996. It is one of our two main pipelines serving our principal source of gas supply, the Neuquén Basin. The pipeline originates in west-central Argentina at Sierra Barrosa (Province of Neuquén), passes through the Provinces of Río Negro, La Pampa and Buenos Aires, and terminates at the Cerri Complex. This pipeline transports the natural gas received from the Neuquén Basin, particularly from the Sierra Barrosa, Charco Bayo, El Medanito, Fernández Oro, Lindero Atravesado, Centenario, Río Neuquén and Loma de la Lata natural gas fields. The gas delivered from Neuba I Gas Pipeline is subsequently compressed and injected into the Loop Sur Gas Pipeline and the General San Martín pipelines for transportation north to the greater Buenos Aires area. As part of the works scheduled to be completed in the five-year plan, we are executing the construction of a compressor plant in the town of Confluencia, Neuquén Province, which will allow the Neuba I Gas Pipeline to be interconnected with the Neuba II Gas Pipeline and thus grant a greater degree of flexibility to the operation of the natural gas transport system.
Loop Sur Gas Pipeline. This gas pipeline was built in 1972 as an extension of Neuba I Gas Pipeline and runs parallel to a portion of the General San Martín gas pipeline. Located in the province of Buenos Aires, it transports natural gas from the Neuba I Gas Pipeline at the Cerri Complex in Bahía Blanca and terminates at the high pressure transmission ring around Buenos Aires, which we also operate. The natural gas delivered by this gas pipeline constitutes a portion of the natural gas supply for the greater Buenos Aires area. Loop Sur Gas Pipeline is also connected to the TGN system and allows us to deliver natural gas to or receive natural gas from TGN. Such transfers occur occasionally during periods of high demand for natural gas.
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Neuba II Gas Pipeline. Our newest natural gas pipeline, Neuba II Gas Pipeline, was built in 1988 and is our second pipeline serving the Neuquén Basin. Neuba II Gas Pipeline was expanded four times between 1996 and 2000, and again in 2008. Neuba II Gas Pipeline begins at YPF’s Loma de la Lata gas treatment plant in the western portion of the basin and runs through the Provinces of Neuquén, Río Negro, La Pampa and Buenos Aires (through the Cerri Complex), up to its terminal station located at Ezeiza just outside of Buenos Aires. Neuba II Gas Pipeline is a principal source of natural gas for the Federal District and the greater Buenos Aires area. In 2008, this pipeline was expanded as a part of the Second Expansion, resulting in the construction of 153 miles of natural gas pipeline.
Other Pipelines. We also operate the Cordillerano natural gas pipeline, built in 1984, which receives gas from the Neuquén Basin and supplies it mainly to three tourist centers in southern Argentina. In addition, we operate other minor pipelines, the high pressure transmission ring around Buenos Aires, the Chelforó-Conesa natural gas pipeline and other natural gas pipelines known as natural gas transfer pipelines.
Additional information regarding the expansion of our gas transportation system is included in “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations.”
Ancillary Facilities
Cathodic Protection System
Currently, we operate cathodic protection devices, which are located along our main pipelines. The objective of this system is to prevent the corrosion process. The corrosion process causes metal loss, which, depending on the severity of the damage, may cause pipeline ruptures. Cathodic protection equipment includes direct current rectifiers, and generators powered by thermic, turbine natural gas engines in locations where no electric lines are available. The system also includes an impressed current anode, which facilitates circulation of electricity through the circuit formed by the generator, the anode itself, the pipe and the land.
Measurement and Control of the Transport System
To guarantee the reliability of the facilities and optimize the operation of the transport system, it is necessary to have real-time information from the various measurement and control devices installed throughout our more than 5,746 miles of gas pipelines and 32 compressor plants.
To that effect, we have fiscal measurement stations associated with gas receptions from producer facilities and gas deliveries to our distributors or customers, in addition to the mediation equipment installed in the compressor plants to determine the volumes of pumped gas, fuel and other variables of operational interest.
All the information generated by the field devices is collected by our SCADA/EFM system, transmitted through our communications infrastructure and centralized at our headquarters. The fiscal mediation information contains volumes and quality of gas, which is collected by the SCADA/EFM system and saved in a database for further processing by other corporate systems.
In addition, the information is shared in real time with producers, distributors and ENARGAS in order to ensure the required auditability and transparency.
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Natural Gas Control System
Located at our Buenos Aires headquarters, the gas control system controls scheduled gas injections and deliveries and allows us to follow gas flows in real time. Data is received from compressor stations by phone and automatically from remote terminal units (“RTUs”) installed in the receipt and delivery points equipped with the Electronic Flow Measurement (“EFM”) system. The information is normally collected by the supervisory control and data acquisition system (which has an ad hoc database that is updated every 30 seconds on average) and is then consolidated into other databases. In order to control gas injection and deliveries, we have developed a software system called Solicitud, Programación, Asignación y Control, which, among other things, allows us to control actual volumes and projected future injections to determine producer deviations. As part of this system, we operate meteorological equipment and receive daily weather information from various sources, which is used for the purpose of forecasting natural gas demand.
Natural Gas Measurement
Shipped and delivered natural gas is measured through primary field facilities that are connected with RTUs. Such RTUs transmit the data to the Buenos Aires headquarters. This data is utilized to prepare reports for clients, shippers, producers and ENARGAS. Energy balances are also prepared in order to control our system efficiency.
Liquids Production and Commercialization
Our Liquids production and commercialization activities are conducted at our Cerri Complex. It is located near the city of Bahía Blanca and is connected to each of our main pipelines. The Cerri Complex consists of an ethane extraction cryogenic plant to recover ethane, LPG and natural gasoline, together with a lean oil absorption plant to recover LPG and natural gasoline. The facility also includes compression, power generation and storage facilities. The Cerri Complex processing capacity is approximately 47 MMm3/d.
As part of the Cerri Complex, we also maintain at Puerto Galván a storage and loading facility for the natural gas liquids extracted at the Cerri Complex. The Cerri Complex, including the Puerto Galván facility, is currently capable of storing 68,882 short tons of liquids. See this “Item 4. Our information—B. Business Overview—Liquids Production and Commercialization.”
Midstream
As part of this business segment, we provide services related to natural gas including treatment, gathering and compression. As of the date of issuance of this Annual Report, total compression capacity of our plants Plaza Huincul, Río Neuquén and El Chourron was 34,790 HP. Treatment services are provided by plants located in Plaza Huincul and Río Neuquen with a total capacity of 5.9 MMm3/d. Finally, conditioning services are provided Tratayén plant amounted to 28MMm3/d as of the date of issuance of this Annual Report.
Our assets in Vaca Muerta allowed us to provide solutions to our clients. Through the development of the Vaca Muerta System, which consists of two pipeline sections totaling 183 km and a natural gas conditioning plant located in Tratayén, connected to the main pipelines operated by us (Neuba I and Neuba II), TGN (Central Oeste), and GPM. This Project executed since 2028 will be pivotal in the development of Vaca Muerta natural gas reserves. The execution of these works demanded great commitment from our team and compliance with all the terms agreed with our customers.
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This pipeline system goes through several hydrocarbon fields, including Bajada de Añelo, La Calera, Bandurria Sur, Fortín de Piedra, El Mangrullo, Aguada Pichana Este, Rincón la Ceniza, El Trapial, Los Toldos I Sur and Pampa de las Yeguas I and II.
In November 2024 and February 2025, we commissioned additional investments that allow us to expand our natural gas conditioning capacity and increase our role in the Vaca Muerta development, including the installation of the Propak Plant to be operated in gas conditioning mode until we are able to develop a natural gas processing project in the Tratayén Plant. The Propak Plants may be converted to allow processing of natural gas in the future, and they increased our conditioning capacity by 6.6 MMm3/day for each Propak Plant. With the addition of the Propak Plants, our total gas conditioning capacity increased up to 28MMm3/d since February 2025. The total estimated investment for this expansion was US$360 million.
Telecommunication
We own two interconnected networks beginning in the Buenos Aires Province, which consist of (i) a flexible and modern microwave digital network with Synchronous Digital Hierarchy technology over more than 2,858 miles, which covers the Buenos Aires–Bahía Blanca–Neuquén routes to the West and the Buenos Aires–Bahía Blanca–Comodoro Rivadavia–Río Grande routes to the South, and (ii) a dark fiber optic network of approximately 1,056 miles, which covers the La Plata–Buenos Aires–Rosario–Córdoba–San Luis–Mendoza routes. There is also a network in the Patagonia region, which consists of a “lit” fiber optic network of approximately 373 miles, which covers the Puerto Madryn–Pico Truncado route.
Environmental, Social and Governance
We are committed to managing its business and operating its facilities in compliance with the requirements of applicable legislation and the requirements to which it voluntarily adheres, satisfying the expectations of its customers and prioritizing the quality of its services, the prevention of pollution and the health and safety of its personnel and contractors, through the continuous improvement of the effectiveness of its management system.
In 2025 we continue to work on the Environmental, Social and Governance (ESG) Strategic Plan in which we prioritize these three thematic axes and lines of action that will guide our purpose in this area. Focused on our mission and the role we seek to play in the communities where we do business, the general objectives of our ESG Plan are as follows:
graphic
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Environment
During 2025, we continued implementing the actions set forth in our 2022–2026 Environmental Strategic Plan, aimed at strengthening a corporate culture focused on sustainability, prevention and environmental care.
Our environmental strategy is structured around three main axes: (i) mitigation and adaptation to climate change, (ii) proactive environmental leadership, and (iii) circular processes and responsible consumption.
In connection with climate change mitigation, our strategy establishes a target to reduce methane emissions by 50% by 2030 compared to emissions recorded in 2021. To support this objective, we implemented a comprehensive emissions action plan that includes technological upgrades, operational improvements and best practices. During 2025, we strengthened our emissions inventory by updating emission factors in line with the latest IPCC assessment reports, reviewed internal emissions management procedures to ensure consistency and traceability, and advanced the identification of mitigation opportunities through technological and operational improvements.
As part of our climate risk management approach, during 2025 we developed and implemented a climate resilience strengthening plan with a nine‑month implementation horizon. This plan was executed through a transversal approach across the Company and focused on the review and reinforcement of processes, procedures, technologies and contingency measures aimed at anticipating, adapting to and recovering from climate‑related impacts.
With respect to biodiversity and sustainable forestry, we executed forestry management plans at 34 facilities, including the planting of native and locally adapted species and interventions on deteriorated specimens, contributing to biodiversity protection, soil improvement and climate change mitigation.
In the area of water and effluents management, we advanced toward our objective of achieving sanitary effluent treatment systems across all operational sites by installing biodigesters at 13 additional facilities during 2025, enabling the recovery of effluents treated for irrigation purposes and improving water resource efficiency.
In addition, we continued strengthening circular processes and responsible consumption practices, including waste management initiatives aimed at increasing recycling rates and improving traceability through integrated monitoring systems.
During the year, we completed maintenance audits of our Integrated Management System certifications under ISO 14001:2015, ISO 9001:2015 and ISO 45001:2018, covering 45 sectors through on‑site external audits and additional internal assessments.
Social
Throughout the year 2025, we consolidated our commitment to the development of talent and the creation of a positive work environment, main cornerstones to leverage the cultural, digital and business cultural transformation we are pursuing. It was a year notable for the attraction of new talents, continuous training and the strengthening of leadership, characterized by initiatives that directly impacted on our business sustainability.
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In the field of talent attraction, we conducted 102 recruitment processes, 16 of which were covered internally— thus promoting movement and growth within the organization—, whereas 86 were hired from outside, bringing in new insights and experience to enrich our teams. As a relevant landmark of the year, we can point out at the launching of the Internship Program, which allowed us to add 14 students in two stages of the year, taking in young energy and innovation. Besides, we participated in strategic events such as the Oil & Gas Exhibition in Buenos Aires, thus upholding our employer brand and positioning in the sector. With the goal of generating local employment and contributing to the development of the nearby communities, we developed employability workshops for 210 technical schools students in Río Negro and Neuquén and supervised professional practices in secondary schools, facilitating employability tools.
The year was filled with learnings, new recruitments and opportunities for our people. That is our recipe for building teams that make the difference.
We cultivate a healthy and challenging work environment and we watch over the integral wellbeing of our people. For over ten years, we have been one of the greatest places to work in Argentina, as certified by the global firm Great Place to Work. During 2025, we renovated the measurement of organizational climate with the Slik platform, which provides us with customized surveys, real-time dashboards and artificial intelligence insights. In July 2025, we launched the climate survey, obtaining 75% positive perception of working at tgs and a Net Promoter Score of 52 points, indicators that underscore the strength of our culture based on trust, development and wellbeing.
We devised a method to work on our strategy, businesses and culture in a comprehensive manner. 2030 Vision gathers people from different areas of the Company, at different organizational levels and of different ages in pursuit of a common purpose: “To self-transform to transform.”
We identify which are the organizational qualities that we need to nurture to become the company we aim to be. Based on this diagnosis, we devise mechanisms that allow us to do things in a different way to evolve in our decision-making, social bonds and daily execution of our tasks.
2030 Vision builds a bridge between today’s and the future EBITDA. We place people at our core and open opportunities so that we can be key players in the future.
We keep promoting our organizational behaviors —pursuing more, placing the client at the core, innovating cooperatively— intensifying our presence in daily performance, leadership spaces, and performance processes.
Likewise, we continue to advance our digital transformation, consolidating our change management cell. Organized as agile, cross‑functional working cells, this capability serves as a strategic resource for driving the adoption of new tools, processes and work styles. Throughout 2025, we supported transversal projects —SAP S/4HANA and digital transformation initiatives, among others— fostering communications, open talks and specific action devised to ensure that people embrace transformation and can blend it into their day-to-day performance.
For information regarding our employees and its geographical distribution see “Item 6. Directors, Senior Management and Employees—D. Employees.”
Governance
We permanently seek to develop and improve our internal policies and procedures, adhering to the best international practices, with the main purpose of protecting and enhancing our Company’s value for all our shareholders.
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Our Corporate Governance practices are regulated by applicable Argentine law, particularly, General Companies Act, the standards issued by the CNV and other entitled entities, our Bylaws, as well as other documents approved by our Board of Directors. We are further subject to the standards and regulations of both the NYSE and the SEC.
Our Corporate Governance Goals are to ensure:

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Greater transparency in our performance, through the outlining of a culture of integrity and clarity in our business management.

•
Adequate supervision through the continuous improvement of our internal control structure, leadership in compliance with regulations and adoption of policies addressed to achieve effective risk management.

•
Proper allocations of accountability. Clear delineation of the scope of responsibility undertaken by the Board members and managers of the Company, related to compliance with internal policies and regulations.
Among the measures we implemented to ensure transparency in our actions, are the following components, among others, articulated into an Integrity Program, in accordance with the provisions of the Corporate Criminal Liability Law No. 27,401:
Code of Conduct
Our Code of Conduct governs the behavior of our directors, statutory auditors, management members and employees of both us and our subsidiary. Further, we seek to ensure acceptance of the Code of Conduct by our suppliers, independent contractors, consultants and clients. The Code of Conduct outlines indispensable ethics, transparency and honesty of the people who work at the Company. It stipulates several obligations and it declares the prohibition to forge or tamper with any information or documentation, behave in a manner that may damage our Company or obtain any personal benefit against the interests of the Company. It also stipulates that those who disclose information to the market must have full knowledge of and abide by the CNV Rules and SEC regulations and are under the obligation to report without misrepresentations.
Antifraud Policy
Our Board of Directors has issued an Antifraud Policy, that aims to outline roles and responsibilities and detect irregularities that may arise in connection with the activities we perform.
Sustainability Policy
This policy provides the overall guidelines for conveying our sustainability vision into the development of our strategies and action programs, consistent with business continuity and promoting bonds with our stakeholders.
Best Stock Market Practices Policy
This policy has been adopted to ensure greater transparency in purchase or sale transactions or any kind of operations on negotiable securities listed in stock markets, preventing any person in our Company from obtaining any kind of advantage or economic benefit from the use of privileged information.
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Policy of Related Parties’ Approval and Disclosure
By means of this policy, we have devised mechanisms to detect and disclose related parties’ transactions, under the terms of Argentine Public Offering Law No. 26,831.
Anti-Money Laundering Policy
This policy aims at preventing and detecting unusual or suspicious transactions, in accordance with the definitions of applicable law, accounting standards and international standards.
Clawback Policy
We outlined this policy in 2023 to meet the standards approved by the SEC for companies listed in the NYSE and the National Association of Securities Dealers Automated Quotation (“NASDAQ”). This policy standards aimed at regulating an eventual recovery of compensations erroneously awarded (claw back) to members of the Management Committee.
The Board of Directors at their meeting held on April 16, 2026, amended this policy to update de definitions of “Management Committee” and “Executive Officer,” so as to include the Strategic Projects Vice President within the positions covered by the Clawback Policy, and to propose a provision stating that such definitions shall also encompass any other position that may in the future be created, eliminated, or modified within the structure of the Executive Committee, with the purpose of keeping the Clawback Policy updated in light of any potential changes in our organizational structure.
Cybersecurity Policy
After the SEC issued new requirements that seek to regulate information disclosed regarding material cybersecurity incidents as from December 18, 2023, the Board of Directors meeting held on November 6, 2023 approved amendments to the Cybersecurity Policy, the Cybersecurity Incidents Management and the Systems Emergency Plan.
Under the framework of the SEC and in accordance with international standards ISO 27001 and C2M2, the Board of Directors meeting held on November 3, 2025 approved an updated Cybersecurity Policy, which adds improvements as detailed below:

•
Alignment of roles, responsibilities and controls to the international standards ISO 27001 and C2M2.

•
Integration of information technology and operational technology to increase resilience and business continuity.

•
Outlining of specific definitions and procedures related to the safe use of artificial intelligence.

•
Strengthening our governance framework and incidents management, implementing prompt response mechanisms and clearly delineated responsibilities.

•
Outlining complementary policies: Sensitive Information Classification and Protection Policy, Cybersecurity Risk Management Procedure, Information Technology Emergency Plan, Cybersecurity Incidents Management and Security Policy for Remote Working.

•
Third parties’ risk management by means of contractual clauses and continuous evaluation procedures.
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These policies seek not only to comply with current regulations but also to provide transparency in disclosures and to manage cybersecurity incidents more efficiently.
The Board of Directors expressly delegates in the Executive Committee the determination of the incident materiality and, if applicable, the reporting of the incident. In order to determine the materiality of cybersecurity incidents, the following impacts shall be assessed: economic-financial or business, legal or regulatory, company reputation, people safety, quality and rendering of services, environment and /or stakeholders.
We also conducted the annual revision of the cybersecurity risks matrix.
Risk Management
The permanent assessment of the environment is one of the pillars of our strategic planning, as a premise to guarantee the adaptation of the Company to an uncertain context in continuous transformation. Risk management is, in particular, one of the essential tools to fulfil the need to adapt to the environment.
We have had our Global Risk Management Policy approved by the Board of Directors of the Company since the year 2018.  In the year 2025 the Board of Directors approved an amendment to such policy, to reflect our evolution has had in terms of risk management and to consolidate the progress achieved over the last years. The new Policy establishes the principles adopted by us in the field of risk management and also defines the main responsibilities.
The principles, among others, include the outlining of a continuous, structured, systematic risk management that is also integrated to the organizational culture and the implementation of a framework for risk management that ensures the identification, analysis, assessment, treatment, monitoring and control of them with effectiveness and efficiency through the Company’s processes.
In its supervisory role, the Audit Committee oversees the application and monitoring of our risk management policy and related developments.
 
Thus, the usual process of strategic risk management contemplates that once certain risk has been identified, the existent controls and mitigating factors must be surveyed, weighed and mapped based on impact and likelihood factors. We also determine the “risk appetite” or acceptable level so that —according to the gap between such risk level and the performed assessment—, we can establish the need to implement specific action plans, which are then followed-up to determine their advance status and effectiveness in light of the pursued objectives.
Our investment plan is based on risk prioritization, contemplating among others risks of different natures: operative, environmental, safety, impact on community, non-compliance with requirements, cybersecurity. The strategic risk matrix includes a ESG risk category. This guarantees that the environmental, social and governance risks shall be regularly monitored by the Management Committee, ensuring the follow-up of the effectiveness of the action plans delineated in each case in order to get the assessment of each risk to an acceptable level.
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Insurance
We maintain insurance, subject to deductibles, against third-party liability for damage to all of our facilities used in the Liquids and Midstream business segments and our pipeline assets that pass under rivers or other bodies of water and the Strait of Magellan and business interruption. We believe this coverage is consistent with standards for international natural gas transportation companies. The terms of the policies related to the regulated assets have been approved by ENARGAS. In addition, we have obtained insurance coverage for our directors and officers pursuant to a standard D&O insurance. For additional information, see “Item 3. Key Information—D. Risk Factors—Risks Relating to Our Business—Our insurance policies may not fully cover damage or we may not be able to obtain insurance against certain risks.”
Item 4A.
Unresolved Staff Comments
We do not have any unresolved staff comments.
Item 5.
Operating and Financial Review and Prospects
A. Operating Results
The following Operating and Financial Review and Prospects should be read in conjunction with our Financial Statements included elsewhere herein.
This Operating and Financial Review and Prospects discussion contains forward-looking statements that involve certain risks, uncertainties and assumptions. These forward-looking statements can be identified by the use of forward-looking terminology such as “may,” “will,” “will likely result,” “intend,” “projection,” “should,” “believe,” “expect,” “anticipate,” “estimate,” “continue,” “plan” or other similar words. Our actual results may differ materially from those identified in these forward-looking statements. For more information on forward-looking statements, see “Cautionary Statement Regarding Forward-Looking Statements.” In addition, for a discussion of important factors, including, but not limited to, our tariffs on the Natural Gas Transportation segment and other factors that could cause actual results to differ materially from the results referred to in the forward-looking statements, see “Item 3. Key Information—D. Risk Factors.”
For purposes of the following discussion and analysis, unless otherwise specified, references to fiscal years 2025, 2024 and 2023 relate to the fiscal years ended December 31, 2025, 2024 and 2023, respectively.
We maintain our accounting books and records in Argentine pesos. Our Financial Statements as of December 31, 2025 and 2024, and for the years ended December 31, 2025, 2024 and 2023 have been prepared in accordance with the accounting policies based on IFRS Accounting Standards.
Our management concluded that Argentina is a hyperinflationary economy in terms of IAS 29, effective as of July 1, 2018. As a result, (i) our audited consolidated statements of financial position as of December 31, 2025, and our audited consolidated statements of comprehensive income, changes in equity and cash flows, and the related explanatory notes for the year ended December 31, 2025, included elsewhere in this Annual Report have been prepared using hyperinflation accounting in accordance with IAS 29, and (ii) our audited consolidated statements of financial position as of December 31, 2024, and our audited consolidated statements of comprehensive income, changes in equity and cash flows, and the related explanatory notes for the years ended December 31, 2024 and 2023, included elsewhere in this Annual Report have been restated to Current Currency in accordance with IAS 29 for comparative purposes. Thus, the Financial Statements and the financial information included in this Annual Report for all the periods reported are presented on the basis of current pesos as of December 31, 2025.
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For information relating to the presentation of financial information, see “Presentation of Financial and Other Information.”
Critical Accounting Policies
Critical accounting policies are those that are most important to the portrayal of our financial condition, results of operations and cash flows, and require management to make difficult, subjective or complex judgments and estimates about matters that are inherently uncertain. In connection with the preparation of our Financial Statements included in this Annual Report, we have relied on assumptions derived from historical experience and various other factors that we deemed reasonable and relevant. Although we review these assumptions in the ordinary course of our business at the end of each reporting period, the presentation of our financial condition and results of operations often requires management to make judgments regarding the effects of matters that are inherently uncertain. Actual results may differ from those estimated as a result of these different assumptions.
We have described each of the following critical accounting policies in order to provide an understanding about how our management forms judgments and views with respect to such policies and estimates:

•
impairment of property, plant and equipment (“PPE”); and

•
provisions for legal claims and others;
For additional information regarding our Critical Accounting policies, see Note 5 to our Financial Statements.
Factors Affecting Our Consolidated Results of Operations
Year to year fluctuations in our net income are a result of a combination of factors, including primarily:

•
the volume of Liquids;

•
changes in international prices of LPG and natural gasoline;

•
regulation affecting our liquids business;

•
changes in the input costs related to the Liquids production and commercialization segment, including the Gas Charge Resolutions;

•
the availability of natural gas and its richness;

•
fluctuation in the peso/U.S. dollar exchange rate;

•
the tariffs we are permitted to charge in our Natural Gas Transportation business segment;

•
local inflation and its impact on costs expressed in pesos; and

•
other changes in laws or regulations affecting our operations, including tax matters.
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Sources of revenue
Natural gas transportation
Our Natural Gas Transportation operations generate revenues from the sale of transportation capacity to customers under a regulated tariff framework. Transportation rates are established and periodically adjusted by ENARGAS in accordance with the applicable regulatory regime and, therefore, our revenues from this segment are predominantly regulated and not freely negotiated.
Tariff charts applicable remained unchanged between April 2019 and March 2022. In April 2023, we received a limited tariff increase below the cumulative evolution of inflation and operating costs during that period, which adversely affected the real value of transportation revenues.
On March 26, 2024, we entered into the 2024 Transitional Agreement with ENARGAS, which outlined a transitory adjustment of 675% in natural gas transportation tariffs. Subsequently, ENARGAS informed us of the postponement of certain scheduled monthly tariff updates, including the adjustment initially corresponding to July 2024, maintaining the tariff tables in effect as of April 3, 2024.
Resolution No. 256 established that the periodic tariff adjustment mechanism would be based on a formula combining the CPI and the WPI, both published by the INDEC. Within the framework of Decree No. 371/2025, the Secretariat of Energy was designated as enforcement authority in matters requiring amendments to contracts or licenses related to tariffs.
On June 4, 2025, the Secretariat of Energy issued Resolution No. 241/2025, which introduced a monthly tariff update mechanism (“Periodic Update”), replacing the previous semi‑annual adjustment scheme. On June 5, 2025, we adhered to Resolution No. 241/2025, and ENARGAS, through Resolution  No. 350/2025, approved the methodology for calculating the Periodic Update and the tariff tables applicable as of June 6, 2025. These tariff tables incorporated both the Periodic Update and the increase resulting from the five‑year tariff review. Accordingly, during 2024 and the period elapsed in 2025, transportation tariffs were adjusted through a series of increases of 675%, 4.0%, 1.0%, 2.7%, 3.5%, 3.0%, 2.5%, 1.5% and 1.7%, effective as of April 3, August 1, September 2, October 1, November 4 and December 4, 2024, and January 1, February 1 and March 6, 2025, respectively. These adjustments had a direct and material impact on transportation revenues during the period.
On June 30, 2025, ENARGAS issued Resolution No. 421/2025 approving new tariff tables applicable to us, which provided for (i) a monthly Periodic Update of 0.62%, calculated in accordance with the formula established by Resolution No. 241/2025 (50% CPI and 50% WPI), and (ii) the application of the five-year tariff review increase. Resolution No. 421/2025 was published on July 1, 2025.
Subsequently, additional Periodic Updates were granted effective as of August 1, September 1, October 1, November 1 and December 1, 2025, and January 1 and February 1, 2026, through Resolutions No. 539/2025, 622/2025, 732/2025, 812/2025, 907/2025, 1000/2025 and 32/2026, providing monthly tariff increases of 1.63%, 2.38%, 2.49%, 2.89%, 1.71%, 2.03% and 2.63%, respectively, together with the corresponding five-year tariff review increases.  For additional information see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation.”
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Production and Commercialization of Liquids
Our production and commercialization of liquids operations generate revenues from the sale of propane, butane, ethane and natural gasoline, in the local and international markets. Revenues from this segment are influenced by a combination of international reference prices, contractual arrangements, export conditions and domestic regulatory frameworks.
Propane and butane sales to the domestic market are primarily carried out under programs and supply schemes established by the Argentine Government, which may affect pricing, volumes and margins. In parallel, we export propane, butane and natural gasoline to international markets, capturing opportunities linked to global price dynamics, logistics availability and contractual structures, including spot and medium‑term arrangements.
We also provide certain related services comprising reception, storage and dispatch of the liquids from the facilities located in Puerto Galván.
For additional information see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”
Midstream
The services included in the Midstream segment consist mainly in: (i) natural gas transportation and conditioning services in Vaca Muerta, (ii) treatment, removal of impurities and natural gas compression, including the collection and transport of natural gas, (iii) inspection and maintenance of pipelines and compressor plants, (iv) services of steam generation for electricity production and management services for expansion works and steam generation to produce electricity.
The Midstream segment is closely linked to the development of unconventional oil and natural gas production in the Neuquén Basin and represents a growing source of revenues as production volumes increase and additional infrastructure is required to evacuate and condition natural gas.
The chart below shows Midstream revenues breakdown by type of service:
graphic
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Telecommunications
Our telecommunications services are derived from the sale of our capacity to customers.
Macroeconomic conditions and inflation
As we are an Argentine corporation (sociedad anónima) and all our operations and assets are located in Argentina, we are affected by general economic conditions in the country, such as demand for natural gas, inflation and fluctuations in currency exchange rates. Moreover, as a provider of a public service and producer of hydrocarbons, the prices of our services and products are subject to significant intervention by the Government. These factors affect our operating costs and revenues.
For the year ended December 31, 2025, 38% and 41% of our revenues were attributable to our Liquids Production and Commercialization segment and our Natural Gas Transportation business segment, respectively.
The following table sets forth, for the years indicated, the variation of key macroeconomic indicators in Argentina during the years specified below, as reported by official sources.
  
2025
  
2024
  
2023
 
WPI (in %)
  
26.2
   
67.1
   
276.4
 
CPI (in %)
  
31.5
   
117.8
   
211.4
 
Devaluation of pesos vs. dollar (in %)
  
41.0
   
27.7
   
356.3
 
Real GDP (pesos of 2004) (% change)
  
4.4
   
(1.7
)
  
(1.6
)
Industrial production (% change)
  
(3.9
)
  
(9.4
)
  
(1.8
)
Transportation services tariffs increase
  
24.0
   
791.0
   
95.0
 
Source: INDEC and Banco Nación.
Argentina has experienced, and continues to experience inflationary pressures. During periods of inflation, effective wages and salaries tend to fall and consumers adjust their consumption patterns to eliminate unnecessary expenses. The increase in inflationary risk may erode macroeconomic growth and further limit the availability of financing, causing a negative impact on our operations. Inflation increases also have a negative impact on our cost of sales, selling expenses and administrative expenses. We cannot give any assurance that increased costs as a result of inflation will be offset in whole or in part with increases in prices of our products and services.
Over the past several years, inflation in Argentina, as measured by the CPI published by INDEC, has remained at high levels. After the adoption of measures in 2019 aimed at controlling inflation, which contributed to a deep recession, inflationary pressures intensified, particularly from 2020 onward. Considering the CPI, inflation was 31.5 %, 117.8%, 211.4%, 94.8%, and 50.9% in the years ended December 31, 2025, 2024, 2023, 2022 and 2021, respectively. 2025 showed a significant slowdown compared to 2024, which is attributed to the economic policies implemented by President Javier Milei since he took office in December 2023.
Monthly inflation decreased from approximately 25.5% in December 2023 to levels close to 2.7% and 2.8% by December 2024 and December 2025, respectively. In early 2026, CPI inflation remained volatile, with monthly increases of approximately 3.4%, resulting in year‑on‑year inflation of approximately 32.6%, as published by the INDEC.
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Unless we can implement measures that allow us to mitigate the impact of inflation on our costs and increasing the efficiency, inflation may have a material adverse effect on our financial condition and results of operations.
IAS 29 requires that the financial statements of an entity whose functional currency is that of a hyperinflationary economy, regardless of whether they are based on the historical cost method or the current cost method, be expressed in terms of the current unit of measurement at the reporting date of the reporting period. IAS standard lists a series of factors that should be considered in determining whether an economy is hyperinflationary, including whether the cumulative rate of inflation over three years’ approaches or exceeds 100%.
In order to evaluate the aforementioned quantitative condition, and also to restate the financial statements, the CNV has established that the series of indexes to be used for the application of IAS 29 is determined by the FACPCE. This series of indexes combines the CPI as of January 2017 (base month: December 2016) with the WPI, both published by the INDEC until that date, computing for the months of November and December 2015, for which there is no information from the INDEC on the evolution of the WPI, the variation in the CPI of the City of Buenos Aires.
Since June 2018, the International Practices Task Force of the Center for Quality, which monitors highly inflationary countries, categorized Argentina as a hyperinflationary country.
The restatement method of IAS 29 provides that monetary assets and liabilities (those with a fixed nominal value in local currency) must not be restated since they are already expressed in the current unit of measurement at the end of the reporting period. In an inflationary period, maintaining monetary assets generates loss of purchasing power and maintaining monetary liabilities generates a gain in purchasing power; provided that such items are not subject to an adjustment mechanism that compensates to some extent for these effects. The monetary loss or gain is included in the result of the period reported, revealing this information in a separate line item.
Assets and liabilities subject to adjustments based on specific inflation agreements must be adjusted in accordance with such agreements. The non-monetary items measured at their current values at the end of the reporting period, such as the net realization value or others, do not need to be restated. The remaining non-monetary assets and liabilities must be (i) restated by applying a general price index and (ii) expressed in the measuring unit (the hyperinflationary currency) current at the end of the reporting period. Any restated non-monetary asset amount does not exceed its recoverable amount.
As of the IAS 29 transition date (January 1, 2016), we applied the following rules to express the shareholders’ equity accounts in the currency unit as of December 31, 2025:

•
The components of the capital stock were restated from the dates they were contributed;

•
Reserved earnings were maintained at the date of transition at their nominal value (legal amount without restatement);

•
The restated unallocated results were determined by the difference between the net assets restated at the transition date and the rest of the initial equity components expressed as indicated in the preceding paragraphs; and

•
After the restatement at the transition date, all the components of the equity were restated by applying the general price index from the beginning of the period, and each variation of those components was restated from the date of contribution or from the moment in which the variation is added by any other means.
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Revenues and expenses (including interest and foreign exchange differences) are restated from the date of their booking, except for those income statement items that reflect or include in their determination the consumption of assets measured in purchasing power of a date before the consumption booked, which are restated based on the date of origin of the asset to which the item is related (for example, depreciation and other consumption of assets valued at historical cost); and also those results that arise from comparing two measurements expressed in purchasing power currency of different dates, for which it is necessary to identify the amounts compared, restate them separately, and make the comparison, but with the amounts already restated.
Because Natural Gas Transportation business segment revenues represented 41% of our total revenues during the year 2025, and are denominated in pesos, any further increase in the rate of inflation not accompanied by a parallel increase in our tariffs would decrease our revenues in real terms and adversely affect our results of operations.
For additional information regarding the impact of the application of IAS 29, see Note 4.d to our Financial Statements included elsewhere in this Annual Report.
In addition, inflation may negatively affect income tax payable. For example, under hyperinflationary contexts, the existence of higher monetary liabilities over monetary assets will mean an increase in income tax payable. Act 27,468 substituted the WPI for the CPI for the calculation of the indexation adjustments for tax purposes, and it modified the standards for triggering the tax indexation procedure.
Economic situation and outlook
We operate in a complex and volatile macroeconomic environment. Since taking office in December 2023, the current administration has implemented a fiscal consolidation program focused on eliminating the fiscal deficit, reducing monetary issuance and stabilizing inflation.
In April 2025, the exchange rate system was loosened, allowing the official exchange rate to fluctuate among exchange rate floor and ceiling bands, adjusted to a monthly 1%. A 41% exchange rate annual variation was recorded for the year 2025. As of December 31, 2025, selling price of a U.S. dollar was quoted at Ps. 1,455.
The agreement with the IMF for US$20,000 million and the additional financing of multilateral entities backed the following phase of the economic program, focused on stabilization and structural reforms. Among the most relevant measures, the following stand out:

‒
Lifting of currency and exchange controls and restrictions on individuals.

‒
Permission for the distribution of earnings to foreign shareholders as from the fiscal years beginning in 2025.

‒
Flexibilization of the terms for the payment of foreign trade operations.

‒
Implementation of the Foundations Law and the RIGI, which granted fiscal, customs and exchange benefits to strategic projects, particularly in energy and mining sectors.
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 		‒
Inflation: The CPI presented a pronounced deceleration, closing the year around an annual 32%, with monthly rates close to 2%, the lowest level recorded in over three years.

‒
Exchange rate: The official dollar closed at Ps. 1,445, within the foreseen band.

‒
Country risk: The Emerging Markets Bonds Index (EMBI+) index was around 571 at the end of the year 2025, presenting a significant improvement compared to the previous year, in line with compliance with the fiscal program and the agreement with the IMF.

‒
International reserves: The BCRA was unable to accumulate reserves and financial volatility remained high, particularly prior to legislative elections.

‒
Economic activity: During the third quarter of 2025, GDP recorded an estimated 3.3% year-on-year increase. This growth was mainly supported by the energy sector’s performance and the dynamism of exports, within a context of moderate domestic consumption and an activity recovery that continued displaying an uneven performance among the different economic sectors.

‒
Employment and salaries: As of December 31, 2025, the salaries index recorded a year-on-year increase of 38.2%, still below the inflation recorded for the period, which implied a decline in the purchasing power of work revenues. On the other hand, the 6.6% unemployment rate recorded in the third 2025 quarter represented a slight improvement compared to previous periods, although in a context of unwavering pressure on the labor market and high levels of informality.
The reporting period was marked by high levels of political and financial volatility associated with midterm elections. The legislative elections held on October 26, 2025 resulted in a significant renewal, shifting the legislative balance and the dynamics for the implementation of reforms. The ruling party increased its representation, although it still lacks its own majority. In view of this context, the Executive Branch stated its intention to drive initiatives aimed at fiscal consolidation, reduction of inflation and economic deregulation.
The government kept its focus on fiscal consolidation and the gradual implementation of reforms, in order to strengthen investors’ trust and move forward to a more stable macroeconomic scenario.
With the aim of reducing exchange instability and curb financial volatility prior to elections, the Argentine government entered into an assistance agreement with the United States. The agreement included a US$ 20,000 million currency swap mechanism and the intervention of the United States Treasury with the purchase of Argentine pesos in the domestic market. The purpose of such measures was to strengthen international reserves and provide foreseeability in a context of high pre-electoral uncertainty.
On April 11, 2025, the Government announced the launch of the next phase of its macroeconomic plan, which includes, among other measures: (i) allowing the exchange rate of the U.S. dollar in the official foreign exchange market (MULC) to fluctuate within a moving band between Ps. 1,000 and Ps. 1,400, with the band limits widening at a monthly rate of 1%; (ii) eliminating the “dollar blend” mechanism, lifting foreign exchange restrictions for individuals, allowing profit distributions to foreign shareholders starting from fiscal years beginning in 2025, and relaxing deadlines for foreign trade payments; and (iii) reinforcing the nominal anchor by enhancing the monetary policy framework, under which the BCRA will not issue pesos to finance the fiscal deficit or to remunerate its monetary liabilities.
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On September 7, 2025, legislative elections were held in the Province of Buenos Aires, in which the ruling party suffered a significant defeat against the opposition coalition Fuerza Patria, which obtained a lead of more than 13 percentage points. National legislative elections were held on Sunday, October 26, the results of which defined the new composition of the National Congress and could have significant implications for Argentina’s economic and regulatory outlook. The government has clearly expressed its intention to move forward with structural reforms aimed at fiscal consolidation, reducing inflation, and economic deregulation; however, uncertainty remains regarding the legislative support needed to implement them. The lack of legislative consensus could limit the scope of the proposed reforms, influence market expectations, and affect macroeconomic stability. The volatility of the Argentine economy and the measures adopted by the government have had, and are expected to continue having, a significant impact on our result of operations and financial situation.
One year after its enactment, the Foundations Law has significantly changed economic and administrative structures in Argentina. Such changes advanced privatization processes, the restructuring of state entities and the execution of RIGI, which started to back investment projects in strategic sectors such as energy and mining, among them Vaca Muerta Sur and Argentina GNL.
The implementation of RIGI allowed us to request adherence to our private initiative project for the expansion of the GPM natural gas transportation capacity. For further information, see “3. Our Businesses. Natural gas transportation. Private Initiative.”
On December 27, 2025, the National Congress simultaneously passed the 2026 Budget Law as well as the law known as “Fiscal Innocence Law.” The latter establishes a tax payers’ presumption of innocence, updates the thresholds for the classification of tax offences, reduces the statute of limitations for tax offences and enables voluntary enrollment to regularize fiscal matters. These provisions bring about higher legal and fiscal certainty, favoring transparency and compliance in corporate management.
The restructuring of the global geopolitical context and order, combined with changes in Argentina’s political and macroeconomic frameworks, creates a dynamic of significant transformations in the overall business climate, particularly in the energy sector.
The restructuring of the economy and shifts in the global perception of Argentina, together with the development of Vaca Muerta and the consequent reconfiguration of the oil and gas industry -driven by a focus on unconventional resources with the need to rebuild transportation and energy infrastructure-, create a dynamic environment with abundant opportunities.
Our Management is permanently monitoring the evolution of the variables that may have impact on our business, in order to outline business plans and identify the possible impacts on our financial condition. This Annual Report must be read in light of the circumstances above mentioned.
While our business continued growing in 2025, our operating results, financial condition and cash flows remain vulnerable to fluctuations in the Argentine economy. See “Item 3. Key Information—D. Risk Factors—Risks Relating to Argentina.”
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Management review of 2025 and outlook
Review
Devaluation of the Argentine peso against the U.S. dollar during 2025 —from Ps. 1,032.00 to Ps. 1,455.00— reached 41.0%, compared to a 27.7% devaluation for the year 2024 relative to 2023. Although inflation -measured by the CPI- decreased significantly during 2025 compared to 2024, it has had a negative impact on our costs and profitability. This impact has been mitigated by the tariff increase in the natural gas transportation segment according and the conclusion of the five-year tariff review and the 2024 Transitional Agreement.
During 2025, our financial position has remained stable and, as discussed in “—B. Liquidity and capital resources,” cash flow from operations has been sufficient to finance our capital expenditures for 2025. Additionally, with a focus on prudent management of our capital structure and preserving our financial position, we issued on November 20, 2025, the 2035 Notes, with a nominal value of US$500,000,000.
During 2025 the exchange restrictions have been gradually relaxed, during 2025 we incurred new indebtedness with well-known financial institutions of Ps. 181,596 million and repaid Ps. 582.1 million in order to cancel goods and services imports. For additional information regarding the new indebtedness incurred during 2025, see “—B. Liquidity and Capital Resources—Description of Indebtedness.”
We have allocated our short-term investment in financial instruments to protect our financial position from inflation and devaluation by increasing our position in financial assets at amortized cost and measured at fair value through profit or loss.
Notwithstanding the above, we cannot assure that the evolution of inflation and other macroeconomic variables will not have an adverse effect on our financial position and results of operations. For further information, see “Item 3. Key Information—D. Risk Factors.”
In addition to the above-mentioned respect of the impact of the devaluation of the Argentine peso on our foreign currency liability position, as of December 31, 2025, there have not been material changes to our Statement of Financial Position compared to December 31, 2024.
For further information, see “—Discussion of results of operations for the years ended December 31, 2025 and 2024” below.
Outlook and other material events that may impact in our financial condition
During 2025 and 2024, our Natural Gas Transportation business experienced a significant normalization of its tariff framework. As from April 3, 2024, we received a transitional tariff increase of 675%, followed by periodic tariff adjustments calculated in accordance with the Transitional Adjustment Index. During 2025, we concluded the five-year tariff review process with ENARGAS, establishing a new regulatory framework applicable for the 2025–2029 period.
On June 30, 2025, ENARGAS issued Resolution No. 421/2025 approving new tariff charts applicable to us. These tariff charts include: (i) a monthly tariff adjustment mechanism established by Resolution No. 241/2025 issued by the Secretariat of Energy and approved by ENARGAS through Resolution No. 350/2025, which applies a formula based on the evolution of the CPI (50%) and the WPI (50%) published by INDEC; and (ii) the tariff increase arising from the five-year tariff review. This framework provides increased visibility regarding the evolution of regulated revenues and supports the execution of the approved investment plan. For additional information, see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Tariff situation.” As a result of the tariff adjustments implemented since April 2024, revenues from the Natural Gas Transportation segment increased to Ps. 705,124 million in 2025, compared to Ps. 580,296 million in 2024, representing 41% of total revenues for the year. However, given the hyperinflationary environment in Argentina, the real impact of such increases remains exposed to the evolution of inflation and the timing of regulatory adjustments. With respect to our Liquids Production and Commercialization segment, international market conditions remain volatile. Global inflationary pressures, fluctuations in international reference prices for NGLs and changes in logistics costs, including sea freight rates, may continue to affect margins on export revenues. During 2025, average international reference prices for propane, butane and natural gasoline declined compared to 2024, contributing to a decrease in segment revenues to Ps. 660,573 million from Ps. 732,283 million in 2024.
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This effect was partially mitigated by improved domestic pricing conditions under local supply programs, higher volumes of ethane commercialized and a lower cost of replacement gas (RTP), which contributed to preserving operating margins. Going forward, the performance of this segment will continue to depend on international price dynamics, logistics costs, domestic regulatory frameworks and the quality and richness of the natural gas processed.
On March 7, 2025, unprecedented heavy rains —without any statistical precedent in the last 100 years— fell on the city of Bahía Blanca and surrounding areas, causing widespread flooding across urban and adjacent regions.
The Event caused the Saladillo García stream to overflow, flooding the Cerri Complex, which resulted in the paralysis of liquids production and partially affected natural gas transportation services. The external electric distribution system, as well as the electric generation and distribution facilities of the installation, were impacted. On March 24, 2025, the natural gas transportation service was restored with no significant impact in the natural gas transportation revenues. We carried out cleanup efforts and prioritized getting the plant back to full operation. Currently, the Cerri Complex is operating under normal conditions.
For the year ended December 31, 2025, we recorded a loss of Ps. 54,281 million related to expenses and asset impairments arising from the Event, which is reflected in Note 8.I) “Other operating results, net” and Note 24 “Climate Event at General Cerri Complex” to our Financial Statements. We maintain insurance coverage for property damage and business interruption, subject to policy terms, deductibles and sub‑limits. The property damage deductible amounts to US$1 million, and business interruption coverage includes a 60‑day waiting period applicable to the Liquids segment.
While negotiations with insurance providers are ongoing and the final recovery amount and timing remain uncertain, as of December 31, 2025 we received Ps. 3,307 million as advance payments against the final settlement of the claim.
As of December 31, 2025, we maintained a solid financial position, with total assets amounting to Ps. 5,414,210 million, compared to Ps. 4,465,552 million as of December 31, 2024. The increase of Ps. 948,658 million was primarily driven by higher cash and cash equivalents, increased holdings of financial assets and continued investments in property, plant and equipment.
Capital expenditures during 2025 were largely focused on maintaining the reliability and integrity of the natural gas transportation system, expanding midstream infrastructure in Vaca Muerta and restoring assets affected by the climatic event at the General Cerri Complex.
Total liabilities amounted to Ps. 2,286,345 million as of December 31, 2025, compared to Ps. 1,527,394 million as of December 31, 2024. This increase was mainly attributable to the growth in non‑current financial debt, which reached Ps. 1,460,728 million, reflecting the 2035 Notes issued during 2025 to strengthen our liquidity profile and support our investment plan.
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Overall, our financial position as of December 31, 2025 reflects a balanced capital structure with a strong equity base and adequate liquidity levels, providing financial flexibility to support ongoing operations, planned capital expenditures and future growth initiatives, while remaining exposed to macroeconomic conditions in Argentina and international financial markets.
Argentina continues to operate in a complex macroeconomic and financial environment. Although inflation decelerated significantly during 2025 and certain macroeconomic indicators showed improvement, uncertainty remains regarding inflation dynamics, exchange rate evolution, access to financing and geopolitical developments, all of which could affect the execution of our investment plans and operating costs.
New accounting pronouncements adopted after January 1, 2025, and pronouncements not yet effective as of December 31, 2025
For more information, see Note 4.a) “New IFRS accounting standards” to our Financial Statements.
Discussion of Results of Operations for the Years Ended December 31, 2025 and 2024
The following table presents a summary of our consolidated results of operations for the years ended December 31, 2025 and 2024, stated in millions of pesos, and the increase or decrease and percentage of change between the periods presented:
  
Year ended December 31,
 
  
2025
  
2024
  
Variation
  
Percentage
of change
 
  
(In millions of pesos)
 
Revenues
  
1,720,626
   
1,604,587
   
116,039
   
7.2
 
Costs of sales
  
(787,388
)
  
(756,721
)
  
(30,667
)
  
4.1
 
Gross profit
  
933,238
   
847,866
   
85,372
   
10.1
 
Administrative and selling expenses
  
(182,449
)
  
(163,998
)
  
(18,451
)
  
11.3
 
Reversal of Impairment of PPE
  
-
   
52,127
   
(52,127
)
  
(100.0
)
Other operating results, net
  
(47,308
)
  
1,073
   
(48,380
)
  
(4,510
)
Operating profit
  
703,481
   
737,067
   
(33,586
)
  
(4.6
)
Net financial results
  
(63,166
)
  
28,362
   
(91,527
)
  
(322.7
)
Share of profit from associates
  
3,728
   
321
   
3,407
   
1,062.3
 
Income tax expense
  
(223,183
)
  
(278,804
)
  
55,621
   
(19.9
)
Total comprehensive income for the year
  
420,860
   
486,945
   
(66,085
)
  
(13.6
)
Year 2025 Compared to Year 2024
Total comprehensive income
For the year ended December 31, 2025, we reported a total net income and a total comprehensive income of Ps. 420,860 million, which represents a Ps. 66,085 million decrease compared to the total comprehensive income of Ps. 486,945 million reported in 2024.
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The material factors affecting total comprehensive income were as follows:

•
Revenues to third-parties reached Ps. 1,720,626 million in 2025, which represents a Ps. 116,039 million increase compared to 2024. This increase was mainly due to higher revenues in the Natural Gas Transportation business segments of Ps. 124,828 million. For more information see “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Regulated Natural Gas Transportation Segment” and “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Regulated Natural Gas Transportation Segment—Liquids Production and Commercialization.”

•
Cost of sales, including depreciation of PPE, reached Ps. 787,388 million in 2025, which represents a Ps. 30,667 million increase compared to 2024. This increase was mainly due to higher labor costs by Ps. 7,040 million, PPE maintenance by Ps. 10,455 million and depreciation of property, plant and equipment by Ps. 31,798 million. These effects were partially offset by a Ps. 28,545 million reduction in the cost of natural gas processed in the Cerri Complex (mainly due a decrease in price, measured in current pesos).

•
Administrative and selling expenses were Ps. 182,449 million in 2025, which represents a Ps. 18,451 million increase compared to 2024. This increase was mainly due to impairment of financial assets by Ps. 11,079 million, insurance by Ps. 3,728 million and professional services fees by Ps. 4,577 million.

•
During 2025, subsidies decreased by Ps. 2,968 million, this mainly driven by the increase in international prices. For more information see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”

•
Cost of sales for the years ended on December 31, 2025 and 2024, represented 45.8% and 47.2%, respectively, of revenues reported in the corresponding year.
Administrative and selling expenses for the years ended on December 31, 2025 and 2024, represented 10.6% and 10.2%, respectively, of net revenues reported in the corresponding year.
Share of Profit from Associates
For the year ended December 31, 2025, we recorded a profit from our investment in associates of Ps. 3,728 million, compared to Ps. 321 million recorded in 2024.
Net Financial Results
In accordance with IAS 29 we presented the financial results in gross terms considering the effects of the change in the currency purchasing power in a single separate line titled “loss on monetary position.” Gains and losses from monetary positions represent the effects of inflation on our monetary liabilities and assets, respectively.
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Net financial results for the years ended December 31, 2025 and 2024, are as follows:
  
Year ended December 31,
 
  
2025
  
2024
 
  
(in millions of pesos)
 
Financial income
      
Interest income
  
32,705
   
30,578
 
Foreign exchange gain
  
185,761
   
122,276
 
Subtotal
  
218,466
   
152,854
 
Financial expenses
        
Interest expense
  
(88,653
)
  
(73,286
)
Foreign exchange loss
  
(297,610
)
  
(199,651
)
Subtotal
  
(386,263
)
  
(272,937
)
Other financial results
        
Fair value gain on financial instruments through profit and loss
  
174,028
   
236,286
 
Others
  
(10,510
)
  
(22,846
)
Subtotal
  
163,518
   
213,439
 
Loss on net monetary position
  
(58,886
)
  
(64,995
)
Total
  
(63,166
)
  
28,362
 
In accordance with the provisions of IAS 29, we opted to present the gain on the monetary position in a single line included in the financial results. This presentation implies that the nominal values of the financial results have been adjusted for inflation. The real values of financial results are different from the components of financial results presented above.
For fiscal year 2025, the net financial loss increased by Ps. 91,527 million compared to the prior year. This negative variation is mainly due to the lower fair value gain on financial instruments through profits and loss of Ps. 62,258 million and higher negative net foreign exchange difference of Ps. 34,474 million.
The peso/US dollar exchange rate ended at a value of Ps. 1,455 per US dollar as of December 31, 2025, representing an increase of 41% (or Ps. 423 per US dollar) compared to the exchange observed as of December 31, 2024. As of December 31, 2024, such rate increased by 27.65% (or Ps. 223.55 per US dollar) respect to the exchange rate as of December 31, 2023. Our net liability position in US dollars increase in 2025.
Likewise, we recorded a loss on net monetary position of Ps. 58,886 million compared with the loss of Ps. 64,995 million in 2024, represented a positive variation of Ps. 6,108 million as a consequence of the deceleration of inflation and the net liability monetary position.
The effects mentioned above were partially offset by the negative variation in results generated by financial assets of Ps. 62,258 million.
Income tax expense
Income tax for fiscal year 2025 was an expense of Ps. 223,183 million, compared to the expense of Ps. 278,804 million in fiscal year 2024. The lower income tax charge was primarily due to the decrease in taxable income in fiscal year 2025.
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The following table sets forth revenues and operating income for each of our business segments for the years ended December 31, 2025 and 2024:
  
Year ended December 31,
  
Year ended December 31, 2025
compared to year ended December 31,
2024
 
  
2025
  
2024
  
Variation
  
Percentage Change
 
  
(in millions of pesos)
 
Natural Gas Transportation
            
Revenues
  
705,124
   
580,296
   
124,828
   
21.5
 
Intersegment revenues
  
30,425
   
16,082
   
14,343
   
89.2
 
Cost of sales
  
(312,107
)
  
(281,658
)
  
(30,449
)
  
10.8
 
Gross profit
  
423,443
   
314,720
   
108,722
   
34.6
 
Administrative and selling expenses
  
(91,320
)
  
(77,616
)
  
(13,703
)
  
17.7
 
Other operating (expense) / income
  
(10,441
)
  
772
   
(11,213
)
  
(1,452.5
)
Reversal of Impairment of PPE
  
-
   
52,127
   
(52,127
)
  
(100.0
)
Operating profit
  
321,682
   
290,003
   
31,679
   
10.9
 
                 
Liquids Production and Commercialization
                
Revenues
  
660,573
   
732,283
   
(71,710
)
  
(9.8
)
Cost of sales
  
(360,168
)
  
(381,988
)
  
21,820
   
(5.7
)
Gross profit
  
300,405
   
350,295
   
(49,890
)
  
(14.2
)
Administrative and selling expenses
  
(47,849
)
  
(55,747
)
  
7,897
   
(14.2
)
Other operating expense
  
(35,560
)
  
(989
)
  
(34,571
)
  
3,495.6
 
Operating profit
  
216,995
   
293,558
   
(76,563
)
  
(26.1
)
                 
Midstream
                
Revenues
  
347,314
   
283,797
   
63,517
   
22.4
 
Cost of sales
  
(139,267
)
  
(102,738
)
  
(36,529
)
  
35.6
 
Gross profit
  
208,048
   
181,059
   
26,988
   
14.9
 
Administrative and selling expenses
  
(41,606
)
  
(28,943
)
  
(12,663
)
  
43.8
 
Other operating income
  
(1,267
)
  
1,290
   
(2,557
)
  
(198.2
)
Operating profit
  
165,174
   
153,406
   
11,768
   
7.7
 
                 
Telecommunications
                
Revenues
  
7,615
   
8,212
   
(597
)
  
(7.3
)
Cost of sales
  
(6,272
)
  
(6,420
)
  
148
   
(2.3
)
Gross profit
  
1,343
   
1,792
   
(449
)
  
(25.1
)
Administrative and selling expenses
  
(1,674
)
  
(1,692
)
  
18
   
(1.1
)
Other operating income
  
(39
)
  
-
   
(39
)
  
N/A
 
Operating (loss)/profit
  
(370
)
  
100
   
(470
)
  
(470
)
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Regulated Natural Gas Transportation Segment
The Natural Gas Transportation business segment represented 41% and 36% of our total revenues during the years 2025 and 2024, respectively. Natural Gas Transportation revenues are derived mainly from firm contracts, under which pipeline capacity is reserved and paid for regardless of actual usage by the shipper. We also provide interruptible natural gas transportation services subject to availability of the pipeline capacity. In addition, we render operation and maintenance services for the Natural Gas Transportation facilities, which belong to certain gas trusts created by the Government to expand the capacity of the Argentine natural gas transportation pipeline system. This business segment is subject to ENARGAS regulation.
For additional information regarding the history of our discussions with various governmental authorities in relation to the adjustment of our gas transportation tariffs see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework.”
During 2025, the Natural Gas Transportation business segment recorded an operating profit of Ps. 321,682 million, compared to the operating profit of Ps. 290,003 million recorded in 2024. The main factors that affected the results of operations of this segment compared to 2024 are the following:

•
Revenues from the Natural Gas Transportation business segment increased by Ps. 139,171 million for the year 2025 compared to 2024.

•
During 2025, we received an aggregate nominal tariff increase of 24%.

•
Revenues related to natural gas firm transportation contracts increased by Ps. 81,584 million for the year 2025 compared to 2024, as we had received a nominal tariff increases of 24%. See “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Regulation of Transportation Rates—Actual Rates” for additional information.

•
Revenues related to interruptible natural gas transportation service increased by Ps. 36,187 million for the year 2025 compared to 2024. The increase mainly resulted from tariff increase discussed above and higher volumes dispatched.

•
Revenues relating to the CAU increased by Ps. 7,057 million for the year 2025 compared to 2024 primarily as a result of the same tariff effect. The value of the CAU is much lower than the transportation tariff we are permitted to charge for our natural gas transportation services, because we were not required to make any investment in the construction and expansion of the assets to which the CAU relates. For additional information regarding the CAU see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations.”

•
Costs of sales, administrative and selling expenses for the year ended December 31, 2025 increased by Ps. 44,152 million, from Ps. 359,274 million to Ps. 403,426 million, as compared to the year ended December 31, 2024. This increase was mainly attributable to higher: depreciation by Ps. 10,685 million, PPE maintenance of Ps. 10,127 million, impairment of financial assets of Ps. 8,768 million, turnover tax of Ps. 4,302 million, insurance of Ps. 3,099 million and labor costs of Ps. 2,979 million. These effects were partially offset by license fee of Ps. 1,466 million.

•
During 2024, we recorded a reversal of a previously recorded impairment of PPE by Ps. 52,127 million.

•
During 2025 we recorded other operating expense of Ps. 10,441 million, compared to the income recorded in 2024. The negative variation was mainly due to charges recorded due to the Event.
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Current tariffs
In December 2023, within the context of a significant deterioration in the real value of regulated tariffs, ENARGAS initiated a process to implement a transitory adjustment to natural gas transportation tariffs. On December 14, 2023, ENARGAS issued Resolution No. 704/2023, convening a Public Hearing held on January 8, 2024, to address a transitory tariff adjustment. Following such hearing, Resolution No. 52/2024, dated February 15, 2024, ratified its validity and established that the resulting transitory tariff charts would be issued within 30 business days.
On December 16, 2023, the Argentine Executive Branch issued the Decree No. 55/2023, declaring a state of emergency in the national energy sector through December 31, 2024. Among other matters, this decree: (i) ordered the commencement of the five‑year tariff review process, (ii) provided for the intervention of ENARGAS as from January 1, 2024, and (iii) instructed the Secretariat of Energy to issue the regulations and procedures required to determine tariff conditions for natural gas transportation services. The energy emergency was subsequently extended through July 9, 2026 by Decree No. 370/2025.
On March 26, 2024, we entered into the 2024 Transitional Agreement with ENARGAS, which provided for a transitory tariff increase of 675% in natural gas transportation tariffs. This increase became effective on April 3, 2024, following the issuance of Resolution No. 112/2024. Under the terms of Resolution No. 112/2024, and until the completion of the five-year tariff review process, tariffs were initially intended to be adjusted on a monthly basis in accordance with a composite index, the Transitory Composite Index, comprised of: (i) the Registered Private Sector Salary Index published by INDEC (47%), (ii) the WPI (27.2%), and (iii) the Construction Cost Index for Greater Buenos Aires – materials component (25.8%). The Transitional Agreement also eliminated prior restrictions on dividend distributions. However, during the period from May to July 2024, ENARGAS informed us that the implementation of the monthly tariff adjustments would be postponed. In addition, ENARGAS notified that, for the remainder of 2024, the adjustment methodology initially contemplated under the Transitional Composite Index would be replaced by adjustments based on expected inflation estimates issued by the Ministry of Economy. As a result, tariff charts in effect as of April 3, 2024, remained unchanged during certain months of 2024.
Accordingly, during 2024 and 2025, we received a series of tariff increases of 675%, 4.0%, 1.0%, 2.7%, 3.5%, 3.0%, 2.5%, 1.5% and 1.7%, effective as of April 3, August 1, September 2, October 1, November 4 and December 4, 2024, and January 1, February 1 and March 6, 2025, respectively. These adjustments had a material impact on the year‑on‑year increase in revenues from the Natural Gas Transportation segment.
Pursuant to the five‑year tariff process, on January 14, 2025, ENARGAS, through Resolution No. 16/2025, called for a public hearing held on February 6, 2025, to consider, among other matters, the five‑year tariff review applicable to natural gas transportation and distribution services, as well as the methodology for periodic tariff adjustments. At such hearing, we submitted our proposal, which included our Five‑Year Opex and CaPex Plan for the 2025–2029 period, our regulatory capital base, and a proposed weighted average cost of capital (“WACC”) of 9.98% in real terms after tax. During the same process, ENARGAS indicated that it would apply a WACC of 7.18% in real terms after tax. Subsequently, through Resolution No. 256/2025, ENARGAS approved the five‑year tariff review based on the parameters determined by the regulator.
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Subsequently, Decree No. 371/2025 designated the Secretariat of Energy as the enforcement authority for matters requiring amendments to contracts or licenses related to tariffs. In this context, Resolution No. 241/2025 established a monthly tariff adjustment mechanism, replacing the previous semi‑annual adjustment scheme. On June 5, 2025, we consented to such resolution and ENARGAS approved the methodology for calculating transportation tariffs based on a formula combining CPI and WPI through Resolution No. 350/2025. On July 1, 2025, ENARGAS published Resolution No. 421/2025, granting a periodic tariff update of 0.62% together with the corresponding five‑year tariff review increase. Additional periodic updates were subsequently granted effective August 1, September 1, October 1, November 1 and December 1, 2025, and January 1 and February 1, 2026, through Resolutions No. 539/2025, 622/2025, 732/2025, 812/2025, 907/2025, 1000/2025 and 32/2026, providing monthly adjustments of 1.63%, 2.38%, 2.49%, 2.89%, 1.71%, 2.03% and 2.63%, respectively, together with the applicable five‑year tariff review increases.
On June 13, 2024, ENARGAS issued a technical and legal report concluding that we had fully complied with our obligations under the License. Following the non‑binding public hearing held on October 21, 2024, such report enabled ENARGAS to issue a recommendation to the Executive Branch regarding the extension of the License. By means of Decree No. 495/2025, the Executive Branch ratified the Memorandum of Agreement entered into between the Ministry of Economy and us on July 11, 2025, extending the License originally granted by Decree No. 2458/1992 for an additional 20‑year term as from December 28, 2027.
Liquids Production and Commercialization Segment
Unlike the Natural Gas Transportation segment, revenues of the Liquids Production and Commercialization segment are not subject to full regulation by ENARGAS and the Ministry of Energy. However, in recent years, the Government has enacted a number of laws and regulations that have limited our ability to receive the full international market prices for all of the liquids that the Cerri Complex produces. In addition, ENARGAS has the ability to redirect the volumes of natural gas in the system to cover certain uses and that may result in lower volumes of natural gas to be processed in the Cerri Complex. See “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization—Regulation” for more information.
The Liquids Production and Commercialization segment represented 38% and 46% of our total revenues during the years ended December 31, 2025, and 2024, respectively. Liquids Production and Commercialization activities are conducted at the Cerri Complex, which is located near Bahía Blanca and is connected to each of our main pipelines. At the Cerri Complex, we recover ethane, LPG and natural gasoline for our own account, on behalf of our customers and on a fee basis, collecting a commission for the extracted Liquids delivered to our customers.
For the fiscal years 2025 and 2024, all of our sales were made for our own account.
All ethane produced by our Liquids segment in the years ended December 31, 2025 and 2024 was sold locally to PBB. Our ethane sales for the years 2025 and 2024 represented 27.5% and 24.6% of our Liquids Production and Commercialization net revenues.
In 2025, we sold 54.8% of our production of LPG in the local market to LPG marketers, compared to 48.5% in 2024, with the remainder exported to LPG traders. In addition, all-natural gasoline produced during 2025 and 2024 was exported. For more information about these contracts, see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”
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The total annual sales for the Cerri Complex for 2025 and 2024 in tons were as follows:
  
Years ended December 31,
  
Year ended December 31, 2025
compared to year ended
December 31, 2024
 
  
(volumes in tons)
  
(volumes in tons)
 
  
2025
  
2024
  
Increase/
(Decrease)
  
Percentage
Change
 
Local Market
            
Ethane
  
334,596
   
309,894
   
24,702
   
8.0
 
Propane
  
191,020
   
201,257
   
(10,237
)
  
(5.1
)
Butane
  
112,786
   
154,760
   
(41,974
)
  
(27.1
)
Subtotal
  
638,402
   
665,911
   
(27,509
)
  
(4.1
)
                 
Exports
                
Propane
  
192,602
   
192,412
   
190
   
0.1
 
Butane
  
147,265
   
111,363
   
35,902
   
32.2
 
Natural Gasoline
  
98,460
   
107,664
   
(9,204
)
  
(8.5
)
Subtotal
  
438,327
   
411,440
   
26,887
   
6.5
 
Total Liquids
  
1,076,729
   
1,077,350
   
(621
)
  
(0.1
)
The Liquids segment was impacted during 2025 by a large‑scale climatic event that tested both our facilities and operational capabilities. Despite the temporary shutdown of the General Cerri Complex, the rapid response of our teams and the operational resilience of our assets enabled a swift recovery. Supported by the quality of the natural gas processed —particularly volumes sourced from Vaca Muerta— and the operational efficiency of our facilities, total liquids sales reached 1,076,729 tons, while production levels remained above 1,000,000 tons. During 2025, the segment operated with efficiency and reliability ratios of 98.4% and 98.8%, respectively, reinforcing our leading position in the sector.
Export revenues from our Liquids Production and Commercialization segment command a price premium, as compared to our domestic market sales, primarily as a result of regulation of domestic prices See “Item 8. Financial Information—A. Consolidated Statements and Other Financial Information—Exports.”
For the years ended December 31, 2025 and 2024, the total accrued withholding taxes on exports amounted to Ps. 22,287 million and Ps. 30,423 million, respectively.
In the domestic market, the Secretariat of Energy continued to implement measures aimed at reducing the fiscal impact of energy subsidies and mitigating the adverse effects that participation in the Households with Bottles Program and the Propane for Networks Agreement has historically had on the operating results of natural gas liquids producers. These measures included increases in the regulated sales prices applicable under such programs.
Historically, participation in these programs required the commercialization of LPG volumes at prices below market levels and, under certain circumstances, below processing costs. However, as from January 24, 2025, following the enactment of Resolution No. 15/2025 issued by the Secretariat of Energy, the maximum sale price applicable to products supplied under the Households with Bottles Program was eliminated. While the obligation to supply the domestic market remains in force, the resolution removed the mandatory product supply contributions previously applicable under this program.
With respect to the Propane for Networks Agreement, the applicable framework provides for compensation payable by the Argentine Government, calculated as the difference between the regulated propane price and the export parity published monthly by the Secretariat of Energy. Nevertheless, significant delays have been experienced in the compensation collection. As of December 31, 2025, the outstanding balance amounted to Ps. 12,720 million. Under the terms of the agreement, such compensation is to be settled through fiscal credit certificates to be used for the payment of hydrocarbon export duties.
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Additionally, Decree No. 446/2025, entered into force on July 3, 2025, introduced amendments to Law No. 26,020, including greater flexibility in producer pricing, while maintaining the obligation to supply the domestic market.
During 2025, not taking into account the aforementioned supply programs, domestic propane sales totaled 152,901 tons and domestic butane sales totaled 2,279 tons, primarily to the fractionating market and, to a lesser extent, to industrial, propellant and automotive segments.
In 2025, we continued commercializing ethane, under a long-term agreement entered with PBB. This agreement contemplates similar terms to the ones agreed in the previous agreement, but includes improvements in the take or pay clause of annual compliance, which ensures us an increase in our sales volume to be implemented gradually over the first five years of the agreement. In 2025, ethane tons sold to PBB slightly went up to 334,596 tons, from the 309,894 tons recorded in 2024.
See “Item 4. Our Information—B. Business Overview—Competition—Liquids Production and Commercialization—Regulation—International Market” for additional information.
During 2025 the Liquids Production and Commercialization business segment recorded operating profits of Ps. 216,995 million, compared to Ps. 293,558 million in 2024. The main factors that influenced the results of operations for this segment in 2025, compared to 2024, were the following:

•
Revenues decreased by Ps. 71,710 million for the year 2025 compared to 2024. This negative effect was mainly due to lower international benchmark prices by Ps. 76,617 million, the negative real exchange rate variation by Ps. 35,678 million, lower volumes of trading and propane and butane and natural gasoline of Ps. 13,962 million and Ps. 12,903 million, respectively. These effects were partially offset by higher domestic butane prices of Ps, 56,179 million and higher volumes of ethane dispatched by Ps. 13,408 million.

•
Subsidies decreased by Ps. 2,968 million in the year 2025 compared with 2024.

•
In 2025 propane, butane and natural gasoline average export prices recorded decreases of 4%, 10% and 14%, respectively, compared to 2024.

•
During 2025, the production of Liquids reached 1,076,729 tons, 621 tons lower than in 2024, despite of the occurrence of the Event.

•
There were no production restrictions during the winter period, as a result of a greater supply of local gas due to non-conventional gas developments.

•
Cost of sales, administrative and selling expenses for the year ended December 31, 2025, decreased by Ps. 29,718 million, to Ps. 408,017 million from Ps. 437,735 million, as compared to the year ended December 31, 2024. This decrease was mainly due to lower cost of natural gas purchased as RTP of Ps. 14,202 million (mainly as a consequence of the decrease in the price of natural gas), taxes on exports of Ps. 8,136 million and property, plant and equipment maintenance of Ps. 4,311 million.

•
Other operating expenses increased by Ps. 34,571 million, principally as a consequence of charges made by the Event.
123
In 2025, export revenues from the Liquids Production and Commercialization segment were Ps. 292,674 million and accounted for 17% of total revenues and 44% of total Liquids Production and Commercialization revenues, as compared to 23% and 51%, respectively, in 2024
In 2025, we exported propane and butane at spot prices, which allowed us to capture opportunities associated with different market niches, allowing us to considerably increase the individual fixed prices of each operation.
In 2025, we continued commercializing LPG by land, dispatching roughly 11,402 trucks (303,106 tons) loaded with our own product, in comparison to 14,389 trucks (331,751 tons) dispatched in 2024. Trucks dispatches are basically carried out to meet our domestic demand and allow us to export our products to neighboring countries. Although these volumes are substantially lower than exports by sea, they capitalize a higher operative margin and increase our clients’ portfolio.
We continued rendering logistic services at Puerto Galván facilities in a successful manner in spite of the partial impairment of the facilities after the Event.
In 2025, propane and butane deliveries overseas were conducted in a spot modality, seizing opportunities related to different markets’ niches, which allowed us to increase considerably the fixed premiums of each transaction.
We also keep strengthening our positioning in the Brazilian market, maintaining our sea exports in a direct modality (with no go-betweens) to Brazilian LPG distributors.
In connection with natural gasoline, in 2024 and 2025 exports were conducted pursuant to an agreement entered with Trafigura Pte Ltd at an international price less a discount, for a term of 2 years from February 2024 to February 2026. As of the date this Annual Report, we have been able to enter an agreement with ATMI Total Energies (subsidiary of Total Energies) for the period between March 2026 to February 2028, improving the conditions of the agreement in effect in 2025.
As previously mentioned, international prices showed a downward trend in 2024, declining steadily throughout the year with only minor monthly fluctuations.
Midstream
This segment includes midstream services. Midstream services include natural gas treatment, separation and removal of impurities from the natural gas stream and compression services, which are generally rendered to the natural gas producers at the wellhead, transportation and conditioning services in Vaca Muerta, as well as activities, related to construction, operation and maintenance of pipelines and compressor plants.
124
During 2025, the Midstream business segment recorded an operating profit of Ps. 165,174 million, which represents a Ps. 11,768 million increase compared to Ps. 153,406 million in 2024. In 2025, the main factors that affected the results of operations of this segment were the following:

•
Revenues increased by Ps. 63,517 million primarily due to: (i) higher natural gas transportation and conditioning services in Vaca Muerta for Ps. 79,488 million. These effects were partially offset by a decrease in the real exchange rate on revenues denominated in U.S. dollars for Ps. 15,592 million, compression of natural gas services by Ps. 642 million and lower operation and maintenance services rendered by Ps. 355 million.

•
Costs of sales, administrative and selling expenses increased by Ps. 49,192 million, mainly due to increases in: (i) depreciation of PPE by Ps. 19,818 million, (ii) third-party services by Ps. 5,293 million, (iii) repair and maintenance expenses by Ps. 4,865 million and (iv) labor costs by Ps. 3,790 million.
Telecommunications
Telecommunication services are rendered by our subsidiary Telcosur. During 2025, the Telecommunications business segment recorded operating losses of Ps. 370 million, compared to profits of Ps. 100 million in 2024. The main factors that affected the results of operations of this segment during 2025 are the following:

•
Revenues decreased by Ps. 597 million in the year ended December 31, 2025, in comparison to 2024.

•
Costs of sales, administrative and selling expenses decreased by Ps. 166 million in the year ended December 31, 2025, in comparison to 2024, mainly due to lower third-party services and telecommunications and post expenses.
Year 2024 Compared to Year 2023
  
Year ended December 31,
 
  
2024
  
2023
  
Variation
  
Percentage
of
change
 
  
(in millions of pesos)
 
Revenues
  
1,604,587
   
1,297,140
   
307,447
   
23.7
 
Costs of sales
  
(756,721
)
  
(815,698
)
  
58,977
   
(7.2
)
Gross profit
  
847,866
   
481,442
   
366,424
   
76.1
 
Administrative and selling expenses
  
(163,998
)
  
(145,717
)
  
(18,282
)
  
12.5
 
Reversal of Impairment of PPE
  
52,127
   
-
   
52,127
   
100.0
 
Other operating results, net
  
1,073
   
(2,174
)
  
3,246
   
(149.4
)
Operating profit
  
737,067
   
333,552
   
403,515
   
121.0
 
Net financial results
  
28,362
   
(208,492
)
  
236,853
   
(113.6
)
Share of profit / (loss) from associates
  
321
   
(87
)
  
408
   
(468.6
)
Income tax expense
  
(278,804
)
  
(57,602
)
  
(221,202
)
  
384.0
 
Total comprehensive income for the year
  
486,945
   
67,371
   
419,574
   
622.8
 
125
Total comprehensive income
For the year ended December 31, 2024, we reported a total net income and a total comprehensive income of Ps. 486,945 million, which represents a Ps. 419,574 million increase compared to the total comprehensive income of Ps. 67,371 million reported in 2023.
The material factors affecting total comprehensive income were as follows:

•
Revenues to third parties reached Ps. 1,604,587 million in 2024, which represents a Ps. 307,447 million increase compared to 2023. This increase was mainly due to higher revenue in the Natural Gas Transportation business segments of Ps. 296,545 million. For more information see “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Regulated Natural Gas Transportation Segment” and “Item 5. Operating and Financial Review and Prospects—A. Operating Results—Regulated Natural Gas Transportation Segment—Liquids Production and Commercialization.”

•
Cost of sales, including depreciation of PPE, reached Ps. 756,721 million in 2024, which represents a Ps. 58,977 million decrease compared to 2023. This decrease was mainly due to Ps. 96,337 million reduction in the cost of natural gas processed in the Cerri Complex, mainly due a decrease in price, measured in current pesos. These effects were partially offset by an increase in the labor cost of Ps. 6,552 million, PPE maintenance of Ps. 14,751 million and technical operator assistance fee of Ps. 17,324 million.

•
Administrative and selling expenses were Ps. 163,998 million in 2024, which represents a Ps. 18,282 million increase compared to 2023. This increase was mainly due to higher tax on exports and turnover tax by Ps. 15,347 million, and professional services fees by Ps. 4,726 million. These effects were partially offset, principally, by a decrease in depreciation of PPE of Ps. 3,667 million.
During 2024, subsidies decreased by Ps. 7,105 million, mainly driven by the increase in international prices. For more information see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”
Cost of sales for the years ended on December 31, 2024 and 2023, represented 47.2% and 62.9%, respectively, of revenues reported in the corresponding year.
Administrative and selling expenses for the years ended on December 31, 2024 and 2023, represented 10.2% and 11.2%, respectively, of net revenues reported in the corresponding year.
Share of profit / loss from associates
For the year ended December 31, 2024, we recorded a profit from our investment in associates of Ps. 321 million, compared to a loss of Ps. 87 million recorded in 2023.
Net Financial Results
In accordance with IAS 29 we presented the financial results in gross terms considering the effects of the change in the currency purchasing power in a single separate line. Gains and losses from monetary positions represent the effects of inflation on our monetary liabilities and assets, respectively.
126
Net financial results for the years ended December 31, 2024 and 2023 are as follows:
  
Year ended December 31,
 
  
2024
  
2023
 
  
(in millions of pesos)
 
Financial income
      
Interest income
  
30,578
   
69,295
 
Foreign exchange gain
  
122,276
   
774,075
 
Subtotal
  
152,854
   
843,370
 
Financial expenses
        
Interest expense
  
(73,286
)
  
(70,550
)
Foreign exchange loss
  
(199,651
)
  
(1,372,385
)
Subtotal
  
(272,937
)
  
(1,442,935
)
Other financial results
        
Fair value gain on financial instruments through profit and loss
  
236,286
   
560,925
 
Others
  
(22,846
)
  
(7,939
)
Subtotal
  
213,439
   
552,986
 
Loss on net monetary position
  
(64,995
)
  
(161,912
)
Total
  
28,362
   
(208,492
)
In accordance with the provisions of IAS 29, we opted to present the gain on the monetary position in a single line included in the financial results. This presentation implies that the nominal values of the financial results have been adjusted for inflation. The real values of financial results are different from the components of financial results presented above.
For fiscal year 2024, the net financial gain increased by Ps. 236,853 million compared to 2023. This positive variation is mainly due to higher positive net foreign exchange difference of Ps. 520,935 million.
The peso/U.S. dollar exchange rate ended at a value of Ps. 1,032.00 per U.S. dollar as of December 31, 2024, representing an increase of 27.65% (or Ps. 223.55 per U.S. dollar) compared to the exchange observed as of December 31, 2023. As of December 31, 2023, such rate increased by 356% (or Ps. 631.29 per U.S. dollar) respect to the exchange rate as of December 31, 2022. Our net liability position in U.S. dollars decreased in 2024.
Likewise, we recorded a loss on net monetary position of Ps. 64,995 million in 2024, compared with the loss of Ps. 161,912 million in 2023. This represented a positive variation of Ps. 96,917 million as a consequence of the deceleration of inflation and the net liability monetary position.
The effects mentioned above were partially offset by the negative variation in results generated by financial assets of Ps. 324,639 million.
Income tax expense
Income tax for fiscal year 2024 was an expense of Ps. 278,804 million, compared to the expense of Ps. 57,602 million in fiscal year 2023. The higher income tax charge was primarily due to the increase in taxable income in fiscal year 2024.
127
The following table sets forth revenues and operating income for each of our business segments for the years ended December 31, 2024 and 2023:
  
Year ended December 31,
  
Year ended December 31,
2024 compared to year
ended
December 31, 2023
 
  
2024
  
2023
  
Variation
  
Percentage
Change
 
Natural Gas Transportation
            
Revenues
  
580,296
   
283,751
   
296,545
   
104.5
 
Intersegment revenues
  
16,082
   
8,047
   
8,035
   
99.9
 
Cost of sales
  
(281,658
)
  
(260,017
)
  
(21,641
)
  
8.3
 
Gross profit
  
314,720
   
31,781
   
282,940
   
890.3
 
Administrative and selling expenses
  
(77,616
)
  
(64,495
)
  
(13,121
)
  
20.3
 
Other operating income / (expense)
  
772
   
(2,330
)
  
3,102
   
(133.1
)
Reversal of Impairment of PPE
  
52,127
   
-
   
52,127
   
100.0
 
Operating profit / (loss)
  
290,003
   
(35,044
)
  
325,047
   
(927.5
)
Liquids Production and Commercialization
                
Revenues
  
732,283
   
760,316
   
(28,034
)
  
(3.7
)
Cost of sales
  
(381,988
)
  
(463,910
)
  
81,922
   
(17.7
)
Gross profit
  
350,295
   
296,406
   
53,888
   
18.2
 
Administrative and selling expenses
  
(55,747
)
  
(50,501
)
  
(5,246
)
  
10.4
 
Other operating (expense) / income
  
(989
)
  
(222
)
  
(767
)
  
345.5
 
Operating profit
  
293,558
   
245,683
   
47,875
   
19.5
 
Midstream
                
Revenues
  
283,797
   
245,256
   
38,541
   
15.7
 
Cost of sales
  
(102,738
)
  
(93,403
)
  
(9,334
)
  
10.0
 
Gross profit
  
181,059
   
151,853
   
29,206
   
19.2
 
Administrative and selling expenses
  
(28,943
)
  
(29,092
)
  
149
   
(0.5
)
Other operating income
  
1,290
   
378
   
912
   
241.3
 
Operating profit
  
153,406
   
123,139
   
30,267
   
24.6
 
Telecommunications
                
Revenues
  
8,212
   
7,817
   
395
   
5.1
 
Cost of sales
  
(6,420
)
  
(6,415
)
  
(5
)
  
0.1
 
Gross profit
  
1,792
   
1,402
   
390
   
27.8
 
Administrative and selling expenses
  
(1,692
)
  
(1,628
)
  
(64
)
  
3.9
 
Operating profit / (loss)
  
100
   
(226
)
  
326
   
(144.3
)
Regulated Natural Gas Transportation Segment
The Natural Gas Transportation business segment represented 36% and 22% of our total revenues during the years 2024 and 2023, respectively.
For additional information regarding the history of our discussions with various governmental authorities in relation to the adjustment of our gas transportation tariffs see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework.”

128
During 2024, the Natural Gas Transportation business segment recorded an operating profit of Ps. 290,003 million, compared to the operating loss of Ps. 35,044 million recorded in 2023. The main factors that affected the results of operations of this segment compared to 2024 are the following:

•
Revenues from the Natural Gas Transportation business segment increased by Ps. 304,580 million for the year 2024 compared to 2023.

•
During 2024, we received a nominal tariff increase of 791%.

•
Revenues related to natural gas firm transportation contracts for the year ended December 31, 2024, increased by Ps. 254,362 million for the year 2024 compared to 2023, as we had received a nominal tariff increase of 791%. For additional information, see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Regulatory Framework—Regulation of Transportation Rates—Actual Rates.”

•
Revenues related to interruptible natural gas transportation service increased by Ps. 30,998 million for the year 2024 compared to 2023. The increase mainly resulted from tariff increase discussed above and higher volumes dispatched.

•
Revenues relating to the CAU increased by Ps. 11,185 million for the year 2024 compared to 2023 primarily as a result of the same tariff effect. For additional information regarding the CAU, see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations.”

•
Costs of sales, administrative and selling expenses for the year ended December 31, 2024 increased by Ps. 34,761 million, from Ps. 324,512 million to Ps. 359,274 million, as compared to the year ended December 31, 2023. This increase was mainly attributable to higher labor costs of Ps. 4,053 million, third parties’ services received of Ps. 2,896 million, technical operator assistance fees of Ps. 12,507 million, taxes and contributions of Ps. 12,330 million and PPE maintenance of Ps. 12,258 million. These effects were partially offset by lower depreciations of Ps. 3,727 million and license fee of Ps. 3,934 million.

•
During 2024, we recorded a reversal of a previously recorded impairment of PPE of Ps. 52,127 million.
In 2024, we recorded other operating income of Ps. 772 million, compared to the losses recorded of Ps. 2,330 million in 2023. The positive variation was mainly due to the reversal of provision for contingencies.
Liquids Production and Commercialization Segment
The Liquids Production and Commercialization segment represented 46% and 59% of our total revenues during the years ended December 31, 2024, and 2023, respectively.
For the fiscal years 2024 and 2023, all of our sales were made for our own account.
All ethane produced by our Liquids segment in the years ended December 31, 2024 and 2023 was sold locally to PBB. Our ethane sales for the years 2024 and 2023 represented 24.6% and 38.1% of our Liquids Production and Commercialization net revenues.
In 2024, we sold 48.5% of our production of LPG in the local market to LPG marketers, compared to 60.6% in 2023, with the remainder exported to LPG traders. In addition, all natural gasoline produced during 2024 and 2023 was exported. For more information about these contracts, see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.” The total annual sales for the Cerri Complex for 2024 and 2023 in tons were as follows:
129
  
Years ended December 31,
  
Year ended December 31, 2024
compared to year ended
December 31, 2023
 
  
(volumes in tons)
  
(volumes in tons)
 
  
2024
  
2023
  
Increase/
(Decrease)
  
Percentage
Change
 
Local Market
            
Ethane
  
309,894
   
394,370
   
(84,476
)
  
(21.4
)
Propane
  
201,257
   
209,058
   
(7,801
)
  
(3.7
)
Butane
  
154,760
   
165,377
   
(10,617
)
  
(6.4
)
Subtotal
  
665,911
   
768,805
   
(102,894
)
  
(13.4
)
                 
Exports
                
Propane
  
192,412
   
160,625
   
31,787
   
19.8
 
Butane
  
111,363
   
70,484
   
40,879
   
58.0
 
Natural Gasoline
  
107,664
   
129,272
   
(21,608
)
  
(16.7
)
Subtotal
  
411,440
   
360,381
   
51,058
   
14.2
 
Total Liquids
  
1,077,350
   
1,129,186
   
(51,836
)
  
(4.6
)
For the years ended December 31, 2024 and 2023, the total accrued withholding taxes on exports amounted to Ps. 30,423 million and Ps. 23,592 million, respectively.
The sales prices under the program for fiscal years 2024 and 2023 were as follows:
Resolution No.
 
Period
 
Ps. per ton (at values
determined by each
resolution)
762/23
 
September 2023 to January 2024
 
Ps. 50,938
11/24
 
February 2024 to August 2024
 
Ps. 137,838
216/24
 
September 2024 to November 2024
 
Ps. 240,000
394/24
 
As from December 2024
 
Ps. 420,000
The terms of Propane for Networks Agreement outlined compensations to be paid by the Argentine Government to the participants, calculated as the difference between the price at which propane is commercialized under the Propane for Networks Agreement and the export parity issued monthly by the Secretariat of Energy. However, there have been significant delays in the compensation collection. The overdue balance as of December 31, 2024 totaled Ps. 14,315 million. The Propane for Networks Agreement stipulates those payments will be conducted through fiscal credit certificates to be used by the producers for the payment of hydrocarbon export rights. As the date of this Annual Report, the certificates corresponding to the deliveries conducted in 2024 have not yet been issued.
Not considering the supply programs above mentioned, we sold in the local market 164,384 tons of propane and 2,601 tons of butane mainly to the fractionating market and to a lesser extent to the industrial, propellant and automobile segments.
In 2024, we continued commercializing ethane, under a long-term agreement entered with PBB. This agreement contemplates similar terms to the ones agreed in the previous one, but involves improvements in the take or pay clause of annual compliance, which ensures us an increase in our sales volume to be implemented gradually over the first five years of the agreement. In 2024, ethane tons sold to PBB slightly went up to 309,894 tons, from the 394,370 tons in 2023.
130
In 2024, the Liquids Production and Commercialization business segment recorded operating profit of Ps. 293,558 million, compared to Ps. 245,683 million in 2023. The main factors that affected the results of operations for this segment compared to 2023 were the following:

•
Revenues decreased by Ps. 28,034 million for the year 2024 compared to 2023. This negative effect was mainly due to the negative real exchange rate variation by Ps. 2,959 million, lower volumes of natural gasoline and ethane shipped by Ps. 69,628 million, lower ethane price by Ps. 59,072 million. These effects were partially offset by higher volumes of propane and butane dispatched of Ps. 52,795 million and international benchmark prices of Ps. 44,180 million.

•
Subsidies decreased by Ps. 7,105 million in the year 2024 compared with 2023.

•
In 2024, propane, butane and natural gasoline average export prices recorded increases of 8%, 10% and 3%, respectively, compared to 2023.

•
In 2024, the production of Liquids reached 1,077,350 tons, a decrease of 51,836 tons compared to 2023.

•
There were no production restrictions during the winter period, as a result of a greater supply of local gas due to non-conventional gas developments.

•
Notwithstanding the changes made to the Households with Bottles Program to supply LPG to the domestic market, for most of the year 2024, we sold this product to a lower price negatively affecting our result of operations.

•
Cost of sales, administrative and selling expenses for the year ended December 31, 2024, decreased by Ps. 76,676 million, to Ps. 437,735 million from Ps. 514,411 million, as compared to the year ended December 31, 2023. This decrease was mainly due to a lower cost of natural gas purchased as RTP of Ps. 96,337 million, mainly as a consequence of a decrease in the natural gas price— and labor costs of Ps. 1,173 million. These effects were partially offset by: (i) taxes on exports of Ps. 6,831 million, and (ii) third parties’ services received of Ps. 5,866 million.

•
Other operating expenses increased by Ps. 767 million.
In 2024, export revenues from the Liquids Production and Commercialization segment were Ps. 374,370 million and accounted for 23% of total revenues and 51% of total Liquids Production and Commercialization revenues, compared to 21% and 36%, respectively, in 2023.
In 2024, we exported propane and butane at spot prices, which allowed us to capture opportunities associated with different market niches, allowing us to considerably increase the individual fixed prices of each operation.
We sold our LPG exports at spot prices and to the date of this Annual Report, we are negotiating new agreements.
In 2024, we continued commercializing LPG by truck, dispatching roughly 14,389 trucks (331,751 tons) loaded with our own product, compared to the approximately 15,518 trucks (379,544 tons) of our own product dispatched in 2023. Trucks dispatches are basically carried out to meet our domestic demand and to export our products to neighboring countries. Although their volumes are substantially lower than the exports conducted by sea, they capitalize on a higher operative margin and increase our clients’ portfolio.
131
We continued rendering logistic services at Puerto Galván facilities successfully. Thanks to the high level of commitment of our employees and our operative efficiency of our facilities, we registered a new record of the number of trucks dispatched daily from the Galván Plant in the month of July 2024.
In 2024, propane and butane deliveries overseas were conducted in a spot modality, seizing opportunities related to different markets’ niches, which allowed us to increase considerably the fixed premiums of each transaction.
We also keep strengthening our positioning in the Brazilian market, maintaining our sea exports in a direct modality (with no go-betweens) to Brazilian LPG distributors.
Natural gasoline exports in 2024 were conducted pursuant an agreement entered with Trafigura Pte Ltd at an international price less a discount, for a term of 2 years from February 2024 to February 2026. International prices presented a stable trend in 2024, rising in the first quarter with some slight month-over-month contractions and then returning to a rising trend in the last quarter. In the short term, international prices are expected to show a rising trend.
Midstream
During 2024, the Midstream business segment recorded an operating profit of Ps. 153,406 million, which represents a Ps. 30,267 million increase compared to Ps. 123,139 million in 2023. The main factors that affected the results of operations of this segment during 2024 are the following:

•
Revenues increased by Ps. 38,541 million primarily due to: (i) higher natural gas transportation and conditioning services in Vaca Muerta for Ps. 41,796 million. These effects were partially offset by the decrease in the real exchange rate on revenues denominated in U.S. dollars for Ps. 1,021 million, compression of natural gas services by Ps. 1,990 million and lower operation and maintenance services rendered by Ps. 751 million.

•
Costs of sales, administrative and selling expenses increased by Ps. 9,186 million, mainly due to the increase in: (i) labor costs by Ps. 2,609 million, (ii) repair and maintenance expenses by Ps. 3,950 million and (iii) Technical operator assistance fees by Ps. 2,344 million.
Telecommunications
Telecommunication services are rendered by our subsidiary Telcosur. During 2024, the Telecommunications business segment recorded an operating profit of Ps. 100 million, compared to a loss of Ps. 226 million in 2023. The main factors that affected the results of operations of this segment during 2024 are the following:

•
Revenues increased by Ps. 395 million in the year ended December 31, 2024, when compared to 2023.

•
Costs of sales, administrative and selling expenses increased by Ps. 69 million in the year ended December 31, 2024, when compared to 2023, mainly due to lower labor costs and third-party services.
132
B. Liquidity and Capital Resources
In 2025, we maintained a solid liquidity position, supported primarily by cash flows generated from operations, our return to international capital markets through the issuance of the 2035 Notes, together with the outstanding 2031 Notes issued in 2024, and access to credit lines from top‑tier financial institutions, within the constraints imposed by prevailing macroeconomic and financial conditions in Argentina.
As of December 31, 2025, cash and cash equivalents and financial investments amounted to Ps. 1,808,174 million, reflecting strong cash generation and disciplined financial management. Net financial debt remained at manageable levels, providing adequate flexibility to meet operating needs, debt service requirements and planned capital expenditures. During 2025, cash flows from operations allowed us to fully fund our operating expenses, maintenance capital expenditures related to the natural gas transportation system and other operating assets, as well as investments associated with new projects.
Our principal uses of cash are capital expenditures, operating expenses, dividend payments to shareholders, servicing of financial debt and general corporate purposes. We believe that working capital, funds generated from operations and, to a lesser extent, financing from third parties will be sufficient to meet our short‑term liquidity needs. We continuously monitor our liquidity position in order to ensure compliance with our financial obligations and the execution of our strategic objectives, with financial solvency remaining a guiding principle of our capital management.
To preserve cash surpluses and mitigate financial risks, we invest excess liquidity primarily in low‑risk, highly liquid financial instruments, including private debt securities issued by top‑tier Argentine companies, and maintain deposits with high‑quality financial institutions located in Argentina and the United States. Our investment policy is designed to diversify credit risk and preserve capital. Given that a significant portion of our financial indebtedness is denominated in currencies other than the Argentine peso, we prioritize placements in U.S. dollar‑denominated or U.S. dollar‑linked instruments.
In 2025, we further diversified our investment portfolio through the acquisition of public and private bonds linked to the U.S. dollar and to the Stabilization Reference Coefficient published by the BCRA (Coeficiente de Estabilización de Referencia or CER), with the objective of mitigating exchange rate exposure on U.S. dollar‑denominated liabilities and reducing the impact of inflation on peso‑denominated cash balances. As of December 31, 2025, approximately 83%, or US$1,034 million, of our fund placements were denominated in or linked to U.S. dollars. During the year ended December 31, 2025, approximately 52% of our consolidated revenues were denominated in U.S. dollars. This natural hedge, combined with our investment strategy, allowed us to limit the impact of exchange rate volatility on our ability to service financial indebtedness.
Cash flows from operating activities remain sensitive to a number of factors, including: (i) fluctuations in international prices for LPG products, (ii) changes in production levels and demand for our products and services, (iii) regulatory developments, including taxes, export duties, price controls and tariffs applicable to our regulated transportation business, (iv) fluctuations in the natural gas price used as replacement gas (RTP), (v) exchange rate movements, and (vi) inflation‑driven increases in operating costs.
Historically, cash generation from our natural gas transportation business was adversely affected by delays in tariff adjustments relative to inflation and capital expenditure requirements. The tariff normalization process implemented since April 2024 has improved cash flow visibility and predictability. However, a further depreciation of the Argentine peso or renewed inflationary pressures not accompanied by corresponding tariff adjustments, or a sustained decline in liquids prices, could adversely affect our cash‑generating capacity, our ability to carry out mandatory capital investments and our ability to service financial debt.
133
In the Liquids Production and Commercialization segment, despite volatility in commodity prices and the impact of the Event, we were able to maintain a positive operating cash flow. While participation in domestic supply programs has historically affected margins and cash generation, regulatory measures implemented during 2025 improved pricing conditions. Nevertheless, delays in the collection of compensations under certain programs and continued regulatory intervention may continue to affect liquidity in this segment.
Our financial position is, and will continue to be, significantly dependent on operating performance, access to capital markets, regulatory developments, exchange rate dynamics and the execution of our capital expenditure program. Actual results may materially differ from our expectations due to changes in the Argentine macroeconomic environment and international financial markets.
Our primary sources and uses of cash during the years ended December 31, 2025, 2024 and 2023 are shown in the table below:
  
Years ended December 31,
 
  
2025
  
2024
  
2023
 
  
(in millions of pesos)
 
Cash and cash equivalents at the beginning of the year
  
78,895
   
18,904
   
26,664
 
Cash flows provided by operating activities
  
551,667
   
636,915
   
543,056
 
Cash flows used in investing activities
  
(454,494
)
  
(506,328
)
  
(591,346
)
Cash flows provided by / (used in) financing activities
  
654,694
   
(41,239
)
  
70,622
 
Net increase in cash and cash equivalents
  
751,867
   
89,348
   
22,332
 
Foreign exchange gains on cash and cash equivalents
  
16,198
   
225
   
4,157
 
Monetary results effect on Cash and cash equivalents
  
(42,852
)
  
(29,583
)
  
(34,248
)
Cash and cash equivalents at the end of the year
  
804,107
   
78,895
   
18,904
 
Based on our cash generation, existing liquidity and committed facilities, we believe that our working capital is sufficient to meet our present requirements, including operating expenses, working capital needs, debt service and maintenance capital expenditures.
Cash Flows Provided by Operating Activities
Cash flows provided by operating activities for the year ended December 31, 2025 amounted to Ps. 551,667 million, representing a decrease of Ps. 85,248 million compared to Ps. 636,915 million generated in 2024. This decrease was mainly attributable to higher income tax payments, which increased by Ps. 180,863 million. This effect was partially offset by higher comprehensive income, adjusted for non‑cash items, which increased by Ps. 105,443 million year‑on‑year, as well as by favorable variations in certain working capital components.
The cash flow provided by operating activities for the year ended December 31, 2024, increased by Ps. 93,859 million, mainly due to higher comprehensive income, adjusted for non-cash income and expense by Ps. 204,252 million and lower income tax payments by Ps. 26,777 million, partially offset by the increase in cash outflows by Ps. 137,170 million in connection with changes in assets and liabilities. The increase in cash outflows was mainly due to lower contract liabilities, trade receivables and other receivables, and an increase in trade payables payments.
134
Cash Flows Used in Investing Activities
Cash flows used in investing activities for the year ended December 31, 2025 amounted to Ps. 454,494 million, representing a decrease of Ps. 51,834 million compared to Ps. 506,328 million used in 2024. This decrease was mainly driven by lower capital expenditures in property, plant and equipment, primarily related to Midstream projects, amounting to Ps. 60,780 million, partially offset by higher acquisitions of financial assets not considered cash equivalents under IFRS Accounting Standards, which increased by Ps. 8,945 million.
The cash flow used in investment activities for the year ended December 31, 2024, decreased by Ps. 85,017 million, mainly driven by lower acquisitions of PPE within the framework of Midstream projects by Ps. 5,723 million and financial assets not considered cash equivalents according to IFRS Accounting Standards by Ps. 79,294 million.
Cash Flows Provided by / (Used in) Financing Activities
Cash flows provided by financing activities for the year ended December 31, 2025 amounted to Ps. 654,694 million, compared to cash flows used in financing activities of Ps. 41,239 million in 2024. This variation was mainly attributed to net proceeds from financial indebtedness during 2025, which amounted to Ps. 927,085 million, partially offset by dividend payments of Ps. 231,152 million.
Cash flow used in financing activities in 2024, amounted to Ps. 41,239 million compared to the cash flow provided by financing activities for Ps. 70,622 million for 2023. This effect was due to net payments of financial debt during 2024 by Ps. 111,860 million.
Description of Indebtedness
As of December 31, 2025, 100% of our total indebtedness was entirely denominated in U.S. dollars. The following table shows our total indebtedness as of 2025 and 2024:
  
2025
  
2025
  
2024
 
  
(in millions of
U.S. dollars)
(2)
  
(in millions of pesos)
 
Current loans:
         
2031 Notes Interest
  
18
   
26,260
   
24,502
 
2035 Notes Interest
  
4
   
6,265
   
-
 
Bank loans
  
140
   
203,790
   
68,356
 
Leases liabilities
  
6
   
8,563
   
10,272
 
Total current loans
  
168
   
244,878
   
103,129
 
Non-current loans:
            
2031 Notes
  
480
   
699,078
   
651,882
 
2035 Notes
  
486
   
707,571
   
-
 
Bank loans
  
33
   
47,857
   
-
 
Leases liabilities
  
1
   
1,232
   
8,115
 
Other loans
  
3
   
4,991
   
-
 
Total non-current loans
  
1,004
   
1,460,728
   
659,998
 
Total loans(1)
  
1,172
   
1,705,606
   
763,127
 

(1)
Issuance expenses net.
(2)
Converted at the exchange rate of Ps. 1,455.00 per US$1.00, which was the selling exchange rate as of December 31, 2025.
On October 11, 2023, CNV approved the extension of the maximum amount of the Global Notes Program from US$1,200 million to US$2,000 million and the extension of the validity period of the Program for an additional 5 years from the expiration of the term, with the new expiration of the Program being January 3, 2029.

135
Class 3 Notes (“2031 Notes”)
 
On July 24, 2024, within the framework of the 2024 Program, the Company issued the 2031 Notes in accordance with the following characteristics:
 
 
2031 Notes
Amount in US$  
490,000,000
Interest Rate  
8.50% annual
Pricing  
98.712%
 
Date of Payment
Percentage on the
Principal Amount to
be Paid
Amortization  
July 24 2031
100%
Frequency of Interest Payment
Semi-annual, payable on January 24 and July 24 of each year.
Guarantor  
None.
 
The proceeds from the issuance of the 2031 Notes amounted to US$ 483,688,800, net of issuance discount. The Company used the net proceeds received to make a purchase and redemption of the 2018 Notes.

Class 4 Notes (“2035 Notes”)
 
On November 20, 2025, within the framework of the 2024 Program, the Company proceeded to issue the 2035 Notes in accordance with the following characteristics:
 
 
2035 Notes
Amount in US$  
500,000,000
Interest Rate  
7.75% annual
Pricing  
98.301%
 
Date of Payment
Percentage on the
Principal Amount to
be Paid
Amortization  
November 20, 2035
100%
Frequency of Interest Payment
Semi-annual, payable on May 20 and November 20 of each year.
Guarantor  
None.
The proceeds from the issuance of the 2035 Notes amounted to US$491,505,000, net of issuance discount. The funds will be used for general purposes, including the expansion of the GPM and the final sections of our transportation system.

Covenants
 
As of December 31, 2025, we have complied with a series of restrictions derived from its current financial agreements, which include, among others, those related to obtaining new loans, payment of dividends, granting of guarantees, disposal of certain assets and transactions with related parties.
We may contract new debts under the following conditions, among others:
 
a.        To the extent that after contracting the new debt (i) the consolidated coverage ratio (ratio between consolidated EBITDA (consolidated income before financial results, income tax, depreciation and amortization) and consolidated interest) is equal to or greater than 2.0:1; and (ii) the consolidated debt ratio (ratio between consolidated debts and consolidated EBITDA) is equal to or less than 3.50:1.b.For the refinancing of outstanding financial debt.c.Originated by customer advances.

136
We may pay dividends under the following conditions: (i) we are not in default under 2031 Notes, and (ii) immediately after any dividend payment, we may incur new debts according to the provisions in point a. of the preceding paragraph.

As of December 31, 2025, the Company and its subsidiary are in compliance with the covenants established in all of their financial debt. As of the date of this Annual Report, the application of the funds obtained from the issuance of 2035 Notes is still pending.

Future Capital Requirements
 
As of December 31, 2025, our estimated material short-term and long-term contractual cash obligations consist of our borrowings, purchases of natural gas used in our Liquids Production and Commercialization business segment, and lease commitments and are detailed by maturity in Note 22 to our Financial Statements.

As previously stated, we are engaged in increasing our transportation capacity of the GPM and final tranches of our Natural Gas Transportation business segment. We expect to invest approximately US$780 million to complete these projects. For additional information see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Expansion of the system.”

Operation of our assets implies that we must incur in capital expenditures to comply with the safety and maintenance of our natural gas pipeline system and other facilities of our business segments.

We expect to continue to rely on cash flow from operations and short-term borrowings and other additional financing activities to finance capital expenditures in the near term.

Our level of investment will depend on several factors, many of which are beyond our control. Among these factors are (i) changes in current regulations, including tax regulation, (ii) the development of the Vaca Muerta area and the increase in natural gas supply, and (iii) changes in the political, economic and social situation prevailing in Argentina.

Currency and Exchange Rates
 
Due to the fact that our entire financial indebtedness is denominated in U.S. dollars, any significant devaluation of the peso would result in an increase in the cost of paying our debt, and therefore, may have a material adverse effect on our results of operations. Our results of operations and financial condition are also sensitive to changes in the peso-U.S. dollar exchange rate because most of our capital expenditures, and the cost of natural gas used in our Liquids business are denominated in U.S. dollars.

Therefore, our primary market risk exposure is associated with changes in the foreign currency exchange rates because our debt obligations are denominated in U.S. dollars and 48% of our consolidated revenues were peso-denominated for the fiscal year ended December 31, 2025. Contributing to this exposure are the measures taken by the Government since the repeal of the Argentine Convertibility Act and the pesification of our regulated tariffs described elsewhere in this Annual Report. This exposure is mitigated in part by our revenues from our Liquids Production and Commercialization business segment, 86% of which are denominated in U.S. dollars for the year ended December 31, 2025. Likewise, 74% of the operating costs of this business segment for that period were denominated in U.S. dollars. For more information, see “Presentation of Financial and Other Information—Currency.”

137
We place our cash and current investments in high quality financial institutions in Argentina and the United States. Our policy is to limit exposure with any financial institution. Our temporary investments primarily consist of money market mutual funds and Government bonds.
 
Our strategy will remain focused on mitigating both the exchange rate risk arising from our liabilities in dollars and the effect of inflation on our liquidity. In a hyperinflationary accounting environment, maintaining monetary assets generates loss of purchasing power and maintaining monetary liabilities generates a gain in purchasing power; provided that such items are not subject to an adjustment mechanism that compensates to some extent for these effects. The monetary loss or gain is booked in the statement of comprehensive income. As of December 31, 2025 and 2024, we maintained a net asset monetary position.

C. Research and Development, Patents and Licenses, etc.
Not applicable.
 
D. Trend Information
 
See “—A. Operating Results” and “Item 8. Financial Information—A. Consolidated Statements and Other Financial Information—Legal and Regulatory Proceedings.”
 
E. Critical Accounting Estimates
 
See Note 5 (Critical Accounting Estimates) to our consolidated financial statements for a description of our critical accounting estimates.

Item 6.
Directors, Senior Management and Employees
 
A. Directors and Senior Management
 
General. Management of our business is vested in the Board of Directors. Our Bylaws provide for a board of directors consisting of a minimum of nine principal directors and nine alternate directors and a maximum of eleven principal directors and eleven alternate directors. In the absence of one or more principal directors, alternate directors will attend meetings of the Board of Directors. Principal directors and alternate directors are elected at an ordinary meeting of shareholders and serve one to three-year renewable terms, as resolved by the shareholders, subject to reelection. Effective and alternate directors shall remain in their positions until substituted by the shareholders. In December 2019, the board approved the rules of its internal operation.

Under our Bylaws and Argentine law, the Board of Directors is required to meet at least once every three months. A majority of the members of the Board of Directors constitutes a quorum, and resolutions must be adopted by a majority of the directors present. In the case of a tie, the Chairman or the person replacing him at a particular meeting is entitled to cast the deciding vote. The Board of Directors may hold meetings either by members in physical attendance thereat or by communication among themselves through other means of simultaneous transmission of sound, images and words.

The Shareholders’ Meeting held on April 15, 2026, appointed current Board of Directors until the shareholders’ meeting that considers the financial statements as of December 31, 2026.

138
The Shareholders’ Agreement (as defined in “Item 7. Major Shareholders and Related Party Transactions—A. Major Shareholders—Shareholders’ Agreement”) contains provisions governing the voting of our shares held by CIESA, the election of the members of our Board of Directors and certain other matters.
 
In February 2015, the Executive Branch enacted Decree No. 196/2015, which complements the provisions of Decree No. 1278/2012, mainly extending indemnity and legal assistance coverage to directors and statutory committee members appointed by the Government in companies in which it has stock participation.

Decree No. 894/2016, established that directors appointed by the FGS shall have the functions, duties and powers established by the General Companies Act, the Capital Markets Law and all the rules applicable to the company in which they act as directors, its bylaws and other internal regulations. On November 19, 2020, Law 27,574 was published in the Official Gazette, which regulates the role of the representatives of the FGS in those companies in which it has a stake, providing that the FGS will dictate the rules that are necessary in order to regulate their appointment, function, responsibility, performance and remuneration, which has been regulated by Decree No. 1041/2020 and ANSES Resolution No. 57/2021.
 
The General Companies Act governs the way directors are appointed. The members of the Board of Directors are appointed by the shareholders at the general annual shareholders’ meeting or by the Statutory Committee, as the case may be, when authorized by the Bylaws. It is not mandatory to be a shareholder of the company to be eligible to be appointed as a director. Section 263 of General Companies Act mandates that up to one-third of the members of the board can be appointed by the “cumulative vote system.” The vote of each shareholder who chooses to use the “cumulative vote system” shall be multiplied by the number of members to be appointed; the result may be partially or fully allocated to any of the candidates. All of the shareholders are entitled to choose the “cumulative vote system,” in other words, not only ANSES has the right to appoint members to the Board of Directors through that system.

Duties and Liabilities of Directors. Under Argentine law, directors have the obligation to perform their duties with the loyalty and diligence of a prudent business person. Directors are jointly and severally liable to us, shareholders and third parties, for the improper performance of their duties, for violating the law, our Bylaws or regulations, if any, and for any damage caused by fraud, abuse of authority or gross negligence. Under Argentine law, specific duties may be assigned to a director by our Bylaws, regulations or by a resolution of a shareholders’ meeting. In such cases, a director’s liability will be determined with reference to the performance of such duties, provided that certain recording requirements are met. Moreover, under Argentine law, directors are prohibited from engaging in activities in competition with us without express shareholder authorization. Certain transactions between us and directors are subject to ratification procedures established by Argentine law.
 
  A director who participates in the adoption of a resolution or who advises on or recognizes such resolution, will be exempted from liability if he leaves written evidence of his objection and notifies the Statutory Committee before his liability is reported to the board of directors, the Statutory Committee, a shareholders’ meeting, or competent authority or before judicial action is exercised. Shareholder approval of a director’s performance terminates any liability of a director vis-à-vis the Company; provided that shareholders representing at least 5% of our capital stock do not object and that such liability does not result from a violation of the law, our Bylaws or regulations.
Causes of action against directors may be initiated by us upon a majority vote of shareholders. If a cause of action has not been initiated within three months of a shareholders’ resolution approving its initiation, any shareholder may initiate the action on behalf of and for our account.
 
139
Every year the Company hires civil liability insurance coverage for directors, Syndics and officers. Such coverage is common practice among public companies who seek protection for such persons against shareholders’ and other parties’ claims.
 
As of the date of this Annual Report, five of the principal directors of our Board of Directors qualify as independent as defined in the NYSE in Section 303A of its Listed Company Manual (“NYSE Standards”), Rule 10A-3 under the Exchange Act and the CNV Rules. Three of the principal directors of our Board of Directors (all of whom are independent in accordance with the NYSE Standards and two of whom are independent in accordance with the CNV Rules) are also members of our Audit Committee. The remaining members of the Board of Directors are not independent. Under the independence requirements, a director is not independent if any of the following apply:
 

 		•
Is also a member of the management body of the controlling entity or another company belonging to the same economic group by a relationship existing at the time of its election or that ceased during the three years immediately preceding.
 

 		•
Is linked to the issuer or its shareholders that hold directly or indirectly “significant shareholding” or with companies in which these also have direct or indirectly “significant shareholding,” or was linked to them by a contract of employment during the last three years.
 

 		•
Provides, or belongs to a professional corporation or association, which renders professional services to or receives any form of remuneration or fees (other than the corresponding remuneration for its position in the administration body) from the issuer, or those shareholders that have any direct or indirect “significant shareholding” in us or from corporations in which shareholders also have any direct or indirect “significant shareholding.”
 

 		•
Directly or indirectly, holds five percent or more of shares entitled to vote of our capital or in a company which holds “significant shareholding” in the latter.
 

 		•
Directly or indirectly, sells or provides goods or services to the company or its shareholders, who hold direct or indirect “significant shareholding” for an amount substantially higher than the compensation received from the position as members of the administration body. This prohibition covers commercial relations that took place during the last three years prior to the appointment as director.
 

 		•
Has been a director, manager, administrator or principal executive of non-governmental organizations that have received funds, for amounts exceeding Ps. 800,000 from the company, its controlling entity and other companies of the group of which we are a part of.
 
•
Receives some payment, including participation in stock option plans, from the company or the companies in its same group, other than the fees to be received under his position as director.
 

 		•
Has served as director at the company, its controlling entity or another company belonging to the same economic group for more than ten years. The condition of independent director will be recovered after at least three years have elapsed since the cessation of his position as director.

•
Is a husband or wife, legal partner, close relative up to third degree of consanguinity or second degree of relationship that, in the case of being a member of the administrative body, would not be independent as set forth in the CNV regulations.
140
In all cases, “significant shareholding” refers to those shareholders holding at least 5% of our common stock, or less in cases when they are entitled to appoint one or more directors per class of share, or have agreements with other shareholders relating to the management and administration of any such companies, or its controlling entity.
 
The following table reflects the current members of our Board of Directors, their respective positions on the Board of Directors and the year they were appointed to such position.

Additional information regarding the occupation and employment background of each of our regular directors is set forth below:
 
Name
 
Date of
Appointment
 
Term
Expires
 
Position
 
Position in Other
Company
Horacio Jorge Tomás Turri
 
4/15/2026
 
2027
 
Chairman
 
Executive Director, Exploration and Production at Pampa Energía
Luis Alberto Fallo
 
4/15/2026
 
2027
 
Vice Chairman
 
Director of Sagua Argentina S.A.
Pablo Daniel Viñals Blake
 
4/15/2026
 
2027
 
Director
 
Partner at Marval O’Farrell Mairal Law Firm
María Carolina Sigwald
 
4/15/2026
 
2027
 
Director
 
Legal Executive director at Pampa Energía
Carlos Alberto Di Brico
 
4/15/2026
 
2027
 
Independent Director
 
Public Accountant
Luis Rodolfo Secco
 
4/15/2026
 
2027
 
Independent Director
 
Economist
Carlos Alberto Olivieri
 
4/15/2026
 
2027
 
Independent Director
 
Independent Consultant
Gabriel Wasserman
 
4/15/2026
 
2027
 
Independent Director
 
Director of BICE Fideicomisos S.A.
Maximiliano Zuddio
 
4/15/2026
 
2027
 
Independent Director
 
Fundación Faro
Jorge Romualdo Sampietro
 
4/15/2026
 
2027
 
Alternate Director
 
Senior Director at Petroquímica Cuyo
Gerardo Carlos Paz
 
4/15/2026
 
2027
 
Alternate Director
 
Pampa Energía’s Legal Affairs Vice President
Diego Chighizola
 
4/15/2026
 
2027
 
Alternate Director
 
Partner at Marval O’Farrell Mairal Law Firm
141
Name
 
Date of
Appointment
 
Term
Expires
 Position 
Position in Other
Company
María Agustina Montes
 
4/15/2026
 
2027
 
Alternate Director
 
Legal affairs and compliance manager at Pampa Energía
Martin Ireneo Skubic
 
4/15/2026
 
2027
 
Independent Alternate Director
 
Manager of Alliances and New Business Development Latam South at Elli Lilly Interamerica
Enrique Llerena
 
4/15/2026
 
2027
 
Independent Alternate Director
 
Partner at Llerena—Amadeo Law Firm
Santiago Alberto Fumo
 
4/15/2026
 
2027
 
Independent Alternate Director
 
Independent consultant
Flavia Vanesa Bevilacqua
 
4/15/2026
 
2027
 
Independent Alternate Director
 
Director of Corporate Affairs at FGS
Javier Eduardo Freigedo
 
4/15/2026
 
2027
 
Independent Alternate Director
 
Corporate Affairs Coordinator of the FGS

Horacio Jorge Tomás Turri is currently Executive Director of Exploration and Production at Pampa Energía. From August 1997 to March 2000, Mr. Turri was Chief Executive Officer of Hidroeléctrica Piedra del Águila. From 1994 to 1997, he was Chief Executive Officer of Gener Argentina S.A. Prior to 1994, he was Development Assistant Manager at Central Puerto S.A. From 1990 to 1992, Mr. Turri worked as investment project’s analyst for the oil, gas, and electricity sectors at SACEIF Luis Dreyfus. He also worked at Arthur Andersen & Co. and Schlumberger Wireline in 1987-1990 and 1985-1987, respectively. He is Chairman of CIESA, Midstream de Gas del Sur S.A. (“MGS”) y Procesadora de Gas del Sur S.A. (“PGS”) as well. Mr. Turri is an Industrial Engineer and received his degree at Instituto Tecnológico Buenos Aires. He was born on March 19, 1961.
 
Luis Alberto Fallo holds a degree in Accounting from the Universidad de La Plata and a Master’s degree in Business Administration from the Universidad del CEMA (Center of Macroeconomic Studies). He currently serves as Director of Simali S.A., Executive Director of Sagua Argentina S.A., President of Beau Lieu S.A., President of Finca de Los Andes S.A., Vice President of Vice President of Aguas de Santiago S.A., President of PEPCA S.A. and Vice Chairman of CIESA, MGS y PGS, President of First Class Flights S.A., and Hostería Las Balsas S.A. Since 1992 he has worked with Grupo Sielecki, the main and controlling shareholder of several companies to which he serves as Director. He was born on January 29, 1960.

Pablo Daniel Viñals Blake holds a law degree from the Universidad Católica Argentina and a master law degree from Harvard Law School. Mr. Viñals Blake has been a foreign associate in the New York office of Milbank Tweed Hadley & McCloy LLP and since 1997 is a partner in the Buenos Aires office of Marval, O’Farrell & Mairal. Mr. Viñals Blake is currently the co-head of Marval’s Mergers & Acquisitions team and head of the Private Equity and Venture Capital and the Agribusiness groups. He has represented domestic and multinational companies, private equity, hedge funds and financial institutions in most of the largest M&A, Agribusiness and project financing transactions in Argentina in the last two decades and advised multilateral financial institutions such as the IFC, IDB and the United States Eximbank on their Argentine operations. He currently serves as a board member of BlackRock Argentina Asesorias S.A., PEPCA S.A., CIESA, MGS and PGS. He was born on October 3, 1962.

142
María Carolina Sigwald has been a member of the Board of Directors of Pampa Energía since 2018 and serves as Executive Director of Legal Affairs of Pampa Energía. Ms. Sigwald worked at the legal department of Central Puerto S.A., and then served as an associate at the New York office at Chadbourne & Parke and then worked at the Corporation Interamericana de Inversiones (IIC) based in Washington. In 1998, Ms. Sigwald returned to Argentina and founded the firm Díaz Bobillo, Sigwald & Vittone, in which she served as an external consultant for energy companies. Before joining as a director at Pampa Energía, between 2015 and 2017, Ms. Sigwald was the director of regulatory and legal affairs at Edenor. Ms. Sigwald is also a member of the boards of CITELEC, CT Barragán, Transba, CIESA, MGS, PGS, Comercializadora e Inversora S.A. y Vientos de Arauco Renovables S.A.U. and alternate director of Transener, Vientos Solutions Argentina S.A.U. y Fiplasto S.A. In addition, Ms. Sigwald acts as Vice-Chairman of Enecor, Autotrol, Pampa Energía Soluciones S.A., Digipa S.A., Pampa Energía Bolivia S.A. y Generación Argentina S.A. Ms. Sigwald is also member of the administration committee of Fundación Pampa Energía Comprometidos con la Educación. Ms. Sigwald holds a law degree with honors from University of Buenos Aires. She was born on November 15, 1967.

Carlos Alberto Di Brico holds a degree in Administration and Public Accountancy from the Universidad de Buenos Aires. He is a member of the board of MGS, PGS, NTN SNR Argentina SA, FDV Intive Argentina SA, Aristocrat Argentina PTY Limited, Perform Media Argentina SRL and Perform Content South America SAS. He has held several management positions at Eveready Argentina S.A. between 1975 and 1995. From 1995 to 1998, he was CFO at Stafford Miller Argentina S.A. Between 2001 and 2013, he served as CFO and later as CEO at Emerson Argentina. Between 2010 and 2017, he was a member of the board of directors of Camuzzi Gas Pampeana S.A. He was born on August 1, 1952.
 
Luis Rodolfo Secco holds a Bachelor’s degree in Economics and a Master’s degree in Banking Disciplines from the Universidad Nacional de La Plata. In 1990 he obtained a scholarship as a full time researcher at the Universitá degli Studi di Siena. Between 1992 and 1994, he was a researcher and director of the School of Banking Disciplines of the Universidad Nacional de La Plata. Between 1994 and 1999, he worked as Chief Economist of M.A.M. Broda and Associates. At the beginning of 2000 he was summoned to work in the government of the then President Fernando De la Rua as economic adviser to the Presidency and General Director of Strategic Analysis of the Secretary of State Intelligence, a position he held until January 2002. In 2002, Mr. Secco founded his economic consulting firm, Economic Perspectives, and is currently director and editor of the Economic Perspectives newsletter. Between 2004 and 2012 he was external director of the Department of Economics of Deloitte Argentina. Since 1988 he has served as a professor at the Faculty of Economic Sciences of the Universidad Nacional de La Plata. He is also a guest columnist for the newspapers La Nación, Perfil and El Economista. He was born on December 14, 1963.
 
Carlos Alberto Olivieri holds a Public Accountant degree from the Universidad Nacional de Rosario and a postgraduate degree in Corporate Financial Management from the University of Michigan and Stanford University. At present, Mr. Olivieri is professor of Finance at Universidad Torcuato Di Tella. Between 2008 and March 2010, Mr. Olivieri acted as a financial advisor at Raymond James and, between 2002 and 2007, he worked for YPF as Chief Financial Officer for Argentina, Brazil and Bolivia. Previously he acted as CFO of YPF, Quilmes Industrial S.A. and Eaton S.A. and President of YPF GAS S.A. and Maxus Corporation (USA). He also had executive responsibilities in other industries, such as Aerolíneas Argentinas and Arthur Andersen & Co. and taught at the Universidad de Buenos Aires and University of Michigan. Mr. Olivieri is also member of the board of directors of Metlife Seguros S.A. and acts as financial advisor. He was born on May 14, 1950.

143
Gabriel Wasserman holds a degree in Business Administration from the Universidad de Belgrano and a Master’s degree in Operations Management from Universidad Austral. He also completed a postgraduate diploma in Regulation of Hydrocarbons and the Energy Industry at the Pontificia Universidad Católica Argentina. Throughout his career, he has held senior executive and board positions in Argentina, Brazil and Israel, including roles as Director of BICE Fideicomisos S.A., Chief Operating Officer of Callzone Communications Ltd., and General Manager of Gramm Agropecuaria S.A., where he led the production, processing and international export of premium agricultural products. His professional background combines corporate governance, operations management, international trade and market development across multiple sectors. He was born in February 1969.

Maximiliano Zuddio holds a degree in International Relations and Political Science from the Pontificia Universidad Católica Argentina. He currently serves as a Director of Empresa Distribuidora y Comercializadora Norte S.A. (Edenor S.A.). Mr. Zuddio has professional experience in public administration, corporate governance and institutional advisory roles. In the public sector, he has held advisory and management positions, including Director of Natural Resources at the Provincial Agency for Sustainable Development (OPDS) and Chief of Staff to several Undersecretariats within the Ministry of Social Development of the Nation. In the private sector, he has held management positions related to strategic communication and advisory services. He was born on November 17, 1988.

Jorge Romualdo Sampietro holds a degree in Chemical Engineering from the Universidad de Buenos Aires and an Executive Program at Darden Business School - University of Virginia. Between 1968 and 1973, he worked as Technical Sales Manager at Dow Química Argentina. From 1973 to 1975, he was Export Manager at Petroquímica Mosconi. Since 1976, he has worked as Commercial and General Manager at several companies. Since 1994, he has been General Manager of Petroquímica Cuyo and currently holds the position of Director of Petroquímica Cuyo S.A.I.C. and of Alternate Director of CIESA, MGS, PGS and PEPCA. He was born on May 12, 1944.

Gerardo Carlos Paz. Mr. Paz obtained a law degree from Universidad Nacional de Córdoba. He has worked at several places such as ENRE from 1994 to 2000, Camuzzi Gas Pampeana from 2001 to 2007 and Pampa Energía S.A. since 2007. Mr. Paz holds a Master’s degree in business law. Mr. Paz serves as Vice Chairman of PACOSA and Transelec. He is also director of HIDISA, HINISA, TJSM and TMB and alternate director of CPB, CIESA, MGS, PGS and Transba. Mr. Paz is also a member of the supervisory committee of CAMMESA. He was born on October 24, 1968

Diego Chighizola holds a Law degree from the Universidad Católica Argentina (2001, cum laude), a Master of Laws (LL.M.) from Columbia University School of Law, New York (2004), and a Master’s degree in Finance from Universidad del CEMA (2007). Mr. Chighizola joined Marval, O’Farrell & Mairal law firm in 2001 and became a partner in 2012, specializing in corporate finance, M&A, agribusiness and real estate. Between 2004 and 2005, he worked as a foreign associate at Cleary, Gottlieb, Steen & Hamilton in New York. Since 2011 he is admitted to practice law in the State of New York and is a member of the Buenos Aires Bar Association.

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María Agustina Montes is an alternate member of Pampa Energía’s Board of Directors. Ms. Montes is a lawyer graduated from the University of Buenos Aires. She currently works as Corporate Legal and M&A Manager of the Company, having joined the company in 2011. She has also worked at Cleary, Gottlieb, Steen & Hamilton in their New York office during 2014. Previously, Ms. Montes worked as an attorney at Bruchou, Fernandez Madero & Lombardi. Currently, Ms. Montes serves as a director of HINISA and Pampa Energía Bolivia S.A., and as an alternate director of Enecor, S.A., and as a member of the board of directors of Enecor, S.A. alternate director of Enecor, HIDISA, Transba, MGS, PGS, CITELEC, CTB, Digipa S.A., CISA, VAR and Autotrol. Ms. Montes serves as president of Trovinver S.A. She was born on September 28, 1981.

Martín Ireneo Skubic serves as manager for alliances and development at Elli Lilly Interamerica. Mr. Skubic served as senior officer at Jergens Argentina S.A., Stafford Miller Argentina S.A., Eveready Argentina S.A. and Pistrelli, Díaz y Asociados. Mr. Skubic holds a degree in public accounting from Universidad de Buenos Aires and holds a Master in Business Administration from Universidad del CEMA.

Enrique Llerena holds a Law degree from the Universidad Católica Argentina. He also holds a degree in Diplomatie et administration des Organization Internationales from the Universite et Paris XI. Since 1982, he has been a partner of the law firm Llerena Amadeo. He has served as the principal director and member of the audit committee of various companies. He is currently the Managing Director of Tradelog S.A. He is also a partner at Llerena & Arias Uriburu. He was born on April 9, 1955.

Santiago Alberto Fumo graduated as a Public Accountant at the Universidad del Litoral, and he also holds a Master’s degree in Law and Economy for the Universidad Torcuato Di Tella. He currently works as an independent consultant in startups and takeovers. Additionally, he acts as syndic at Molinos Río de la Plata S.A., National Oilwell Varco MSW S.A., Tuboscope Vetco de Argentina S.A. and Antares Naviera S.A. He was born on December 10, 1960.
 
Javier Freigedo, born on February 19, 1987, is an attorney who graduated from the University of Buenos Aires in 2015. He worked at the Directorate‑General of Legal Affairs of ANSES until 2020, when he was appointed Corporate Affairs Coordinator of FGS of ANSES.

Flavia Bevilacqua, born on July 30, 1984, is an attorney who graduated from the Pontificia Universidad Católica Argentina in 2008 and holds a Master’s degree in Business and Economic Law from the same university (2014). She worked as an attorney at Garrido Abogados (2006–2010) and Bevilacqua (2014–2021), and at the Directorate‑General of Legal Affairs of the Argentine Air Force (2012–2014). She currently serves as Coordinator of the Production, Industry and Services Sector of the Directorate‑General for Strategic Management and Corporate Affairs of the FGS of ANSES.

Executive Committee. To achieve more streamlined management of the Company, the 2017 Shareholders’ Meeting approved the amendment of our Bylaws for the purpose of allowing, within the scope of the Board of Directors, the possibility of constituting an executive committee (“Executive Committee”), under the terms established by article 269 of the General Companies Act.

The Board of Directors is the body in charge of appointing the members of the Executive Committee, which will be made up of four members: the directors who have been appointed as our President and Vice President, and any other two directors elected by simple majority, with a mandate to serve for one year.
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The Executive Committee will function with a quorum of the majority of its members; the quorum must include our President and Vice President. It will adopt its decisions unanimously and will have the powers determined by the Board of Directors.

The current composition of the Executive Committee was decided by the Board of Directors on April 15, 2026. Luis Alberto Fallo, Horacio Jorge Tomás Turri, Pablo Daniel Viñals Blake and María Carolina Sigwald are in office for a term of one fiscal year, until the meeting that considers the financial statements as of December 31, 2026.

Executive Officers. The following is a list of our executive officers as of the date of this Annual Report, their respective positions with us and the year they were appointed to such position:
 
Name
 
Year of
Appointment
 
Position
Oscar José Sardi
 
2019
 
CEO
Claudia Beatriz Trichilo
 
2019
 
Operations Vice President
Carlos Héctor Sidero
 
2013
 
Human Resources Vice President
Alejandro Mario Basso
 
2016
 
CFO and Services Vice President
Hernán Diego Flores Gómez
 
2017
 
Legal Affairs Vice President
Juan Ignacio de Urraza
 
2020
 
Business Vice President
Rubén Oscar De Muria
 
2018
 
Institutional and Regulatory Affairs Vice President
Jorge Pablo Vugdelija
 
2026
 
Strategic Projects Vice President
 
There is no expiration term defined for the executive officers.

Below is a description of the main activities currently carried out by each of our executive officers, together with the biographical information thereof:

Oscar Jose Sardi received a Mechanical Engineering degree from the Universidad Nacional de Rosario and holds a major in Natural Gas from the Universidad de Buenos Aires. He also participated in a General Administration Program at Universidad Austral. He worked for GdE between 1983 and 1992 and since then, he has held different positions in our operations area. In April 2005, he was designated as our Service Vice President and subsequently appointed as our Operations Director from October 2016 until April 2019, when he was appointed as our CEO. He also acts as President of Telcosur. He was born on September 1, 1955.

Claudia Beatriz Trichilo received a Chemistry degree and a post-graduate degree in Engineering from the Universidad de Buenos Aires. From June 1988 to December 1992, she worked at the Industrial Engineering Department of Gas del Estado. In 1992, Ms. Trichilo joined the Company as Chief of Technical Planning and held such position until December 2002, when she was appointed Technical Developments Manager. From 2007 to 2010, Ms. Trichilo acted as Coordinator of Operations until August 2019, when she was appointed as our Operations Vice President. She was born on March 21, 1963.

Carlos Hector Sidero graduated from Universidad de Buenos Aires as a Certified Public Accountant in Argentina. He worked with Isaura S.A. from 1981 through 1994. From 1994, he managed different areas within the Human Resources department at Eg3 SA and Petrobras Argentina. He joined us in March 2013 as Vice President of Human Resources. He was born on February 16, 1956.

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Alejandro Mario Basso received a Public Accounting degree from the Universidad de Buenos Aires. He worked for Compañía Naviera Pérez Companc from 1987 to 1992, and for Quitral-Co S.A. from 1992 to 1994. From 1994 to 1998, he acted as our Planning and Corporate Control Manager, and between September 1998 and March 2008, he was our Planning and Control Vice President. Between March 2008 and October 2016, he acted as our Management Control and Corporate Governance Vice President. In October 2016, he was designated as our CFO and Services Vice President. He also acts as Vice president of Telcosur S.A. and Gas Link S.A. He was born on October 13, 1961.

Hernán Diego Flores Gómez received a Law degree from the Universidad de Buenos Aires. He is a co-founder and professor of the Hydrocarbons and Energy Industry Law post-graduate course at Universidad Católica Argentina, and he is also a co-founder and professor of the Petroleum and Natural Gas Law post-graduate course at Universidad de Buenos Aires, and professor of the Energy Master’s degree at the Energy Regulatory Activity Studies Center. Additionally, Dr. Flores Gómez has a Master’s degree in Business Law from the Escuela Superior de Economía y Administración de Empresas (ESEADE), a Master’s degree in Finance from the Universidad del CEMA and a Postgraduate degree in Damage Law from Universidad Católica Argentina. He began his career in the National Judicial Branch. Throughout his career, he held various relevant positions on legal matters, institutional and management relationship at companies such as Capsa / Capex S.A., Pluspetrol S.A. and ENAP Sipetrol Argentina S.A. He was born on June 10, 1966.

Juan Ignacio de Urraza holds a degree in Chemical Engineering from the Universidad Nacional de La Plata. He completed several postgraduate courses in Strategic Management, Business Management, Management Development, Management Development and Advanced Leadership. Between March 1991 and July 1992, he worked at the Instituto de Investigaciones Fisicoquímicas, Teóricas y Aplicadas as a researcher in the Corrosion Department. From September 1992 to January 1993, he worked as a fellow at Petroken Petroquímica Ensenada. From July 1993 to September 1994, he worked first as a Process Engineer and then as a Consultant at A&C Analistas Económicos y Consultores de Empresas. Between November 1994 and February 2005 he held different positions in Metrogas. In March 2005 he joined us as Liquids Commercial Head, until September 2007, when he took over as Natural Gas Liquids Commercial Manager. In November 2020 he was appointed Business Director. He was born on September 27, 1969.

Rubén Oscar De Muria received a Public Accountant degree from the Universidad de Buenos Aires. He obtained a master’s degree in Regulations of Gas and Electricity Industries from the Energy Regulatory Activity Studies Center. He worked for Chase Manhattan Bank Argentina and Pérez Companc S.A. between 1985 and December 1992. In December 1992, he joined us as member of the Regulatory Matters and Rates Department. In August 2006, he was promoted to Regulatory Matters and Rates Manager. In December 2015, he was appointed as Institutional and Regulatory Affairs Executive Manager, and, finally in January 2018, as Institutional and Regulatory Affairs Vice President. He was born on January 31, 1964.

Jorge Pablo Vugdelija is an Electronic Engineer graduated from the National Technological University (Universidad Tecnológica Nacional) and completed postgraduate studies in Gas and Electricity Market Regulation at ITBA, an Executive MBA at IAE Business School, and executive programs in strategy and leadership at Penn State University. Throughout his career, he has held senior management positions at Pecom Energía S.A., Petrobras Argentina and Refinería del Norte S.A. (Refinor), and served as Chief Executive Officer of Oleoductos del Valle S.A. (Oldelval) and as Executive President of Oleoductos de Crudos Pesados (OCP) in Ecuador. In January 2026, he joined the Company as Strategic Projects Vice President, where he is responsible for the execution and development of major strategic infrastructure initiatives. He was born on May 15, 1967.
For additional information regarding the provisions included in the Shareholders’ Agreement (as defined below) for the election of our CEO, see “Item 7. Major Shareholders and Related Party Transactions—A. Major Shareholders—Shareholders’ Agreement.”
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Indemnification of Officers and Directors. Under the Shareholders’ Agreement (as defined below), the shareholders of CIESA require us to: (i) limit the liability of each of our officers, syndics and directors for all consequences of their acts or omissions, excluding acts or omissions where there is evidence of fraud or gross negligence and (ii) enter into agreements obligating us to defend, indemnify and hold harmless each of our officers, syndics and directors from and against all liabilities, losses, and other expenses incurred by each such officer, syndic or director in connection with a pending, threatened or completed civil, criminal, administrative or other proceeding, or any investigation that could lead to such a proceeding, by reason of the fact that such officer, syndic or director is or was one of our officers, syndics or directors, including claims alleged to be due to the negligence of such person, but excluding acts or omissions that involve fraud or gross negligence towards us.
 
B. Compensation
 
The remuneration paid by us during the year 2025 to the members of our Board of Directors and executive officers amounted to Ps. 1,044.6 million and Ps. 3,734.7 million, respectively. We do not grant pension or retirement plans or other benefits to members of our Board of Directors or to our executive officers.

Executive officers are subject to a goal-directed management system with a variable remuneration program. Consensual objectives are in line with our global objectives, as the variable remuneration program links a portion of its compensation to the performance thereof and our performance. Total compensation of executive officers consists of a fixed portion (normal and usual remuneration) and a variable portion. The variable portion depends on the level of achievement of the “Outcome” objectives, which consist of economic and financial targets, and “Performance Results,” including business objectives that do not have an associated economic result. We measure achievement of these objectives annually, based on performance during the fiscal period.
 
C. Board Practices
 
For information on the term of office of our directors and executive officers, see “—A. Directors and Senior Management” above. The information in that section is incorporated herein by reference.
 
None of the members of our Board of Directors are party to any service contract with us or any of our subsidiaries providing for benefits upon termination of employment.
 
Audit Committee

According to the Capital Markets Law, publicly listed companies must have an Audit Committee “that will function on a collegiate basis with three or more members of the Board of Directors, the majority of whom must be independent under CNV regulations.” The Audit Committee operates under its Charter of Procedure, which was approved in its meeting held in 2013 in accordance with the requirements of the Capital Markets Law. The Charter of Procedure require that the majority of the members that form the Audit Committee must be independent according to the CNV’s standards. Audit Committee members are designated by a simple majority of the Board of Directors, at the first meeting following designation of the members of the Board of Directors, and they hold office until their successors are designated.

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The Audit Committee adopts its own regulations and must prepare a working plan for each fiscal year.

The Board of Directors appointed the current members of the Audit Committee in their meeting held on April 30, 2025. As of the date of this Annual Report, the Audit Committee members are Carlos Alberto Di Brico, Carlos Alberto Olivieri and Luis Rodolfo Secco and their respective alternates are Martín Ireneo Skubic, Santiago Alberto Fumo and Enrique Llerena. All of Audit Committee members meet the independence criteria set forth under Rule 10 A-3 of the Exchange Act, SEC regulations and NYSE Standards. However, according to CNV Rules, Mr. Carlos Olivieri does not qualify as independent since he has served as director for more than 10 years.

The Audit Committee’s mandatory duties are to:


 		•
supervise the internal control and accounting systems as well as the reliability of the latter and all the financial information and other significant issues that are to be submitted to the SEC, CNV and BYMA in compliance with the applicable disclosure policies;
 

 		•
supervise the application of information policies regarding our risk management;
 

 		•
ensure that the market is informed about those operations where there may be a conflict of interest with one or more members of the Board of Directors, controlling shareholders or other parties as defined by the applicable regulations;
 

 		•
express its view on the reasonableness of fees and stock option plans for directors submitted by the Board of Directors;
 

 		•
express its view as to compliance with laws and regulations and the reasonableness of the conditions of an issuance of shares (or convertible securities), in the case of a capital increase, excluding or limiting preferential rights;
 

 		•
oversee compliance with the Code of Ethics (see “Item 16B.Code of Ethics”); and other relevant rules;
 

 		•
issue a well-founded opinion on whether the terms and conditions of relevant transactions with related parties are according to market practice, within five business days from the receipt of a petition issued by the Board of Directors, and at any other time at which a conflict of interest exists or might exist;
 

 		•
prepare an annual working plan for the fiscal year and notify the Board of Directors and the Statutory Committee within 60 days from the beginning of the period;
 

 		•
fulfill all the obligations stated in our Bylaws and applicable laws and regulations;
 

 		•
express its view on the Board of Directors’ proposals on whether to appoint the external auditors to be hired and monitor the auditors’ independence; and
 

 		•
establish procedures for: (i) the receipt, treatment, investigation and administration of the complaints received by us regarding accounting, internal accounting controls or auditing matters; and (ii) the confidential, anonymous submission by our employees of concerns regarding questionable accounting or auditing matters.
 
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Also, regarding the internal and external auditors, the Audit Committee must:

•
review their plans; and
 

 		•
evaluate and give an opinion on their performance when issuing the annual Financial Statements.
 
In evaluating the external auditors’ performance, the Audit Committee must:
 

 		•
analyze the different services rendered by the external auditors as well as their independence, according to the Technical Resolutions of the FACPCE, and any other related regulations issued by professional councils;
 

 		•
report separately the fees billed as follows: (i) fees for external audit and other assurance services; and (ii) fees related to other special services different from those mentioned above; and
 

 		•
review independence policies of the external auditors in order to verify their fulfillment.
 
Additionally, the Audit Committee must perform the following mandatory duties contained in the regulatory framework:


 		•
Give a prior assessment, that shall be used by the CNV to require us to designate an external auditor as requested by minority shareholders, as long as such shareholders represent at least 5% of our common stock and provide a justified request (in those cases in which the minority shareholders’ rights might be affected) and if CNV understands the credibility of the damage invoked by said shareholders in order to carry out one or more specific reviews. The charges of such reviews shall be borne by the petitioning shareholders (Act No. 26,381, article 108.f);
 

 		•
provide a well-founded assessment about changes of control (Act No. 26,381, article 88), in case of an acquiring tender (Act No. 26,381, article 98) and in cases of residual shareholding acquisition procedures (Act No. 26,381, article 94); and
 

 		•
issue a report supporting a Board of Directors’ resolution to buy back our shares (Act No. 26,381, article 64).
 
Once a year, the Audit Committee is required to prepare a plan for the fiscal year to be presented to the Board of Directors and to the Statutory Committee. The directors, members of the Statutory Committee, managers and external auditors must, when requested by the Audit Committee, attend its meetings, provide the Audit Committee with information and otherwise assist the Audit Committee in the performance of its functions. In order to better perform its functions, the Audit Committee may seek the advice of legal counsel and other independent professionals at our expense, pursuant to a budget approved by the shareholders, and we must provide the Audit Committee with access to the information and documents it may deem necessary to perform its duties.

According to CNV Rules, at least once a year and upon the filing of the annual Financial Statements, the Audit Committee shall issue a report to the shareholders, addressing how such committee performed its duties and the results of its work.

The aggregate compensation paid by us for the fiscal year ended December 31, 2025 to the members of the Audit Committee was Ps. 366.7 million. We do not provide pension, retirement or similar benefits to any member of the Audit Committee.

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Statutory Committee
 
The Statutory Committee is our monitoring body as stipulated in Section No. 284 of the General Companies Act. Our Bylaws provide for a Statutory Committee consisting of three syndics and three alternate members (“Alternate Syndics”). In accordance with our Bylaws, two syndics and the corresponding Alternate Syndics are elected by a majority vote of the holders of our Class A shares. The remaining syndic and corresponding alternate syndic are elected by the majority vote of the remaining holders of our common stock. Each member of the Statutory Committee is elected at the general annual shareholders’ meeting and serves for a one-year renewable term. Members of the Statutory Committee must be lawyers or accountants qualified under Argentine law and, for the accountants, TR No. 45. Our directors, officers and employees may not be members of the Statutory Committee, all members must be independent. Our Bylaws require the Statutory Committee to hold meetings at least once per month.

The primary responsibilities of the Statutory Committee consist of monitoring our management’s compliance with the General Companies Act, our Bylaws and the shareholders’ resolutions, and without prejudice to the role of external auditors, reporting to the shareholders at the general annual shareholders’ meeting regarding the reasonableness of our financial information. Furthermore, the members of the Statutory Committee are entitled to: (i) attend Board of Directors, Executive Committee and shareholders’ meetings, (ii) call special shareholders’ meetings when deemed necessary and general annual shareholders’ meetings when the Board of Directors fails to do so, and (iii) investigate written inquiries initiated by the shareholders. The Statutory Committee does not control our operations or evaluate management’s decisions, which are the exclusive responsibility of the Board of Directors.

The aggregate compensation paid by us for the fiscal year ended December 31, 2025 to the members of the Statutory Committee was Ps. 193.7 million. We do not provide pension, retirement or similar benefits for syndics and alternate syndics.

The following table sets forth the current membership of our Statutory Committee, each of whom was appointed at the 2025 Shareholders’ Meeting, the year when each member was initially appointed and the year when their term expires:

Name
 
Member
since
 
Term
Expires
 
Position
Pablo Fabián Waisberg
 
8/21/2020
 
2027
 
Syndic
José Daniel Abelovich
 
4/21/2020
 
2027
 
Syndic
María Valeria Fortti
 
4/21/2020
 
2027
 
Syndic
Marcelo Héctor Fuxman
 
4/21/2020
 
2027
 
Alternate Syndic
Fernando Pedro Tetamanti
 
8/21/2020
 
2027
 
Alternate Syndic
María Manuela González Giménez
 
4/15/2026
 
2027
 
Alternate Syndic
 
The present principal occupations and employment history of our syndics are set forth below:
 
Pablo Fabián Waisberg is a Certified Public Accountant from the University of Buenos Aires. He is currently an accounting and tax advisor. He is also a trustee of Petrosiel S.A., Areic S.A., Grainco S.A., Petroquímica Cuyo S.A., Sagua Argentina S.A., Noragua S.A., CIESA and Aguas de Santiago S.A. He was born on February 3, 1965.

José Daniel Abelovich obtained a degree in Accounting from the Universidad de Buenos Aires. Since 2025, he is a partner in Lisicki, Litvin & Abelovich, a member firm of Nexia International. Formerly, he was founder member and partner in Abelovich, Polano & Asociados and has served as a Senior Advisor in Argentina for the United Nations and the World Bank. He is a member, among others, of the supervisory committees of Cresud, IRSA, Hoteles Argentinos, Inversora Bolívar, Banco Hipotecario S.A. and tgs. He was born on July 20, 1956.
 
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María Valeria Fortti obtained a degree in accounting and a bachelor in Administration form the Universidad de Buenos Aires. She holds a master’s degree in business administration from the same university. Since 1994, she has been a trustee in the Argentine National Auditing Commission. She is also a member of the supervisory committees of Emprendimientos Energéticos Binacionales S.A., Nucleoeléctrica Argentina S.A. and TELAM S.E. She was born on December 20, 1973.
 
Marcelo Héctor Fuxman obtained a degree in Accounting from the Universidad de Buenos Aires. He is a partner of Abelovich, Polano & Asociados S.R.L., a member firm of Nexia International. He is also a member, among others, of the supervisory committees of Cresud, IRSA, Inversora Bolívar and Banco Hipotecario S.A. He was born on November 30, 1955.
 
Fernando Pedro Tetamanti obtained a degree in Accounting from the Universidad de Belgrano. He is partner of Tycompany advisors.
 
María Manuela González Giménez holds a law degree from the University of Buenos Aires. Since 2010, she has worked at the Sindicatura General de la Nación (SIGEN), where she currently serves as a legal analyst, participating in public sector audits and legal analysis of matters related to internal control and government management. Between 2023 and 2025, she served as Legal Advisor at the Procuración del Tesoro de la Nación, acting as a legal counsel in matters of public law.
 
Compensation Committee
 
We do not have a compensation committee. Compensation decisions are made by our senior management.
 
Corporate Governance Practices; NYSE Requirements
 
See “Item 16G.   Corporate Governance.”
 
D. Employees
 
The following table sets out the number of employees per department as of December 31, 2025, 2024 and 2023:
 
  
Number of Employees as of
December 31,
 
Department
 
2025
  
2024
  
2023
 
General
  
3
   
3
   
2
 
Administration, Finance and Services
  
99
   
121
   
121
 
Human Resources
  
35
   
31
   
29
 
Legal Affairs
  
11
   
11
   
11
 
Public and Regulatory Affairs
  
12
   
11
   
12
 
Safety and Environmental
  
34
   
28
   
30
 
Business
  
77
   
73
   
72
 
Internal Audit
  
5
   
4
   
5
 
Operations
  
873
   
865
   
840
 
Digital Transformation
  
4
   
-
   
-
 
Information Technology
  
29
   
-
   
-
 
Strategic Projects
  
5
   
-
   
-
 
Trainees program
  
-
   
-
   
3
 
Total
  
1,187
   
1,147
   
1,125
 

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The following table sets out the number of employees according to geographical location as of December 31, 2025, 2024 and 2023:
 
  
Number of Employees as of December
31,
 
Location
 
2025
  
2024
  
2023
 
City of Buenos Aires
  
337
   
302
   
301
 
Province of Buenos Aires
  
444
   
438
   
445
 
Province of Chubut
  
54
   
53
   
55
 
Province of La Pampa
  
19
   
17
   
17
 
Province of Neuquén
  
182
   
185
   
156
 
Province of Río Negro
  
65
   
65
   
63
 
Province of Santa Cruz
  
83
   
84
   
85
 
Province of Tierra del Fuego
  
3
   
3
   
3
 
Total
  
1,187
   
1,147
   
1,125
 
 
As of December 31, 2025, 2024 and 2023, the number of temporary employees working for us was 82, 60 and 55, respectively.
 
Under Argentine law, in the event of a dismissal of an employee without cause, the employer is generally required to pay severance, the amount of which is regulated by the Argentine Labor Contract Law (Section 245). Severance is calculated as one month’s wages for each year of service (or fraction exceeding three months) based on the employee’s best monthly, normal and habitual remuneration.
 
On March 6, 2026, Argentina promulgated and published the Labor Modernization Act No. 27,802 (“Labor Modernization Act”), which introduced amendments to the labor framework, including clarifications relevant to severance calculations and employer liabilities. In particular, the Labor Modernization Act clarified the severance calculation base by limiting it to monthly and habitual compensation items and by excluding certain non‑recurring payments and specified benefits from the calculation of “remuneration” for these purposes. In addition, the Labor Modernization Act allows, subject to collective bargaining arrangements and implementing rules, the adoption of alternative mechanisms to address severance-related obligations, including labor termination or assistance funds, without eliminating the employer’s underlying obligation to pay severance.
 
Argentine labor law establishes limits on the severance calculation base applicable to high‑income employees. Although such caps remain in place, the Supreme Court has previously ruled their application may be unconstitutional if they result in a reduction exceeding 33% of the severance amount that would otherwise be payable.
 
With respect to contractors and outsourced services, Argentine courts have historically extended liability to the company that contracted with the contractor in cases involving occupational injuries or labor claims. The Labor Modernization Act introduced changes intended to narrow the scope of joint and several liability in subcontracting arrangements, particularly where the contracting company verifies the subcontractor’s compliance with labor and social security obligations. The practical application of these changes will depend on regulatory implementation and judicial interpretation.
 
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In recent years, high inflation has required frequent negotiations with labor unions. We maintain constructive relationships with the unions representing our employees and have entered into collective bargaining agreements that have been submitted to the national labor authority for approval and incorporation into existing agreements. These arrangements have contributed to labor stability and have helped prevent significant labor disputes or work stoppages.

Our collective bargaining agreements with our unions were approved by the competent Argentine authority and maintain their ultra-activity as established by current legislation. Regarding the salary corresponding to 2025, we signed agreements for the period of April 2025 to March 2026. This is a consequence of the fact that our salary period comprises from the month of April of each year to the month of March of the following year. We are currently in negotiations with trade unions to conclude bargaining agreements for the period April 2026–March 2027, but the status of this negotiation remains uncertain.

As of December 31, 2025, approximately 79% of our workforce is under trade union representation, having the same employment benefits. The unions that represent such employees are Unión del Personal Superior del Gas, Federación Argentina del Gas Natural de la República Argentina (which groups the unions of the City of Buenos Aires, Bahía Blanca and Patagonia Sur) and Sindicato de Trabajadores de la Industria del Gas Natural Derivados y Afines of Neuquén and Río Negro.
 
E. Share Ownership
 
As of March 19, 2026, members of our board of directors and our executive officers held as a group 98,385 of our common shares and 0.0131% of our outstanding share capital.
 
As of March 19, 2026, the following members of our board of directors and our senior management had an ownership interest in our Class B shares of: Carlos Olivieri (0.0021%), Luis Fallo (0.0009%), Oscar Sardi (0.0056%), Claudia Trichilo (0.0042%) and Juan de Urraza (0.0003%).
 
Class B shares held by directors and trustees do not have different voting rights than the other shareholders holding either Class A or Class B Shares. The directors, trustees and senior executives of the Company do not have options regarding the Company’s shares. There are no agreements that grant participation to employees in the assets of the Company, including the issuance or granting of options, shares or any other negotiable value.

 F. Disclosure of a registrant’s action to recover erroneously awarded compensation
 
Not applicable.
Item 7.
Major Shareholders and Related Party Transactions

A. Major Shareholders

The following table sets forth certain information with respect to each shareholder known to us to beneficially own five percent or more of our common stock as of March 31, 2026:
 
Name of Beneficial Owner
 
Number of Shares(1)
  
Percent of Total
Common Shares
  
Class
 
CIESA
  
405,192,594
   
53.83
%
  A
FGS
  
190,685,633
   
25.33
%
  B
Holders through BYMA
  
66,619,034
   
8.85
%
  B
ADRs through Citi
  
90,263,797
(1) 
  
11.99
%
  B
Total
  
752,761,058
   
100.00
%
  
--
 
(1)
Equivalent to 18,052,759 ADRs.
154
The Annual General, Special and Class Shareholders’ Meeting held on April 30, 2025 approved: (1) to reduce our capital due to cancellation of our treasury shares for an amount of Ps. 41,734,225 representing 41,734,225 Class B book-entry shares of a nominal value of Ps. 1 each and entitled to 1 vote per share. As a result of said capital reduction, our capital stock shall turn from Ps. 794,495,283 to Ps. 752,761,058, and (2) to amend sections 5 and 6 and eliminate section 13 of our Bylaws in order to:
 
(i) Establish that Class A shares shall represent 51% or more of the capital stock, while Class B shares shall represent the remaining capital stock.
 
(ii) Eliminate from our Bylaws any reference to Class C shares as there no longer exist any Class C shares.
 
(iii) Include the possibility to convert Class A shares into Class B shares, as long as Class A shares continue to represent at least 51% of the capital stock after conversion.

Our controlling shareholder is CIESA, which holds 53.83% of our common stock and all of our Class A shares and local and foreign investors hold the remaining shares of our common stock, distributed among minority holders with 20.84% and FGS (managed by ANSES) with 25.33%. CIESA is under co-control of Pampa Energía, which holds 50% of CIESA’s common stock, and GIP and PCT, who in the aggregate hold a combined 50% indirect ownership interest in the outstanding capital stock of CIESA, as follows: GIP holds 27.1% and PCT holds 22.90%.

Pursuant to the Pliego and the terms of the 2031 Notes, CIESA may not reduce its shareholding below 51% of our share capital.

FGS owns 25.33% of our common stock. On October 5, 2015, the Argentine Congress passed Law No. 27,181, declaring the protection of the Government’s shareholdings, including those forming part of the portfolio of the FGS, to be in the public interest, and creating the Argentine Agency of Government Investments in Companies as an enforcement authority. This agency was later replaced by the Secretary of Economic Policy and Development Planning of the Ministry of Finance. This agency is in charge of implementing any policies and actions related to the exercise by the Government of any rights arising out of the shares it holds.

In June 2016, the Argentine Congress passed Law No. 27,260, repealing or modifying earlier laws relating to the FGS. Among other things, Law No. 27,260 established that ANSES’ shareholding in public companies may not be sold, in most cases, without the prior authorization of the Argentine Congress if this sale represents a reduction in the FGS’s aggregate shareholding in public companies to below 7%.

Decree No 894/2016, which regulates Law No. 27,260, created the Secretary of Economic Policy and Development Planning. This new agency is responsible for executing policies relating to the exercise of rights corresponding to shareholdings of companies where the Government holds a minority interest. Decree No. 897/2016 states that the directors appointed by ANSES shall have the functions, duties and powers established by General Companies Act.

155
According to applicable regulations, any transfer or other action that limits, alters, cancels or modifies the destination, ownership, possession or nature of the shares held by the FGS which results in a decrease of the FGS’s holdings in a manner inconsistent with applicable law, shall not be conducted without prior express authorization of the Argentine Congress, with the following exceptions:


 		•
Public takeover bids addressed to all holders of such shares at a fair price authorized by the CNV, under the terms of Chapters II, III and IV of Title III of the Capital Markets Law.
 

 		•
Exchange of shares for other shares of the same or another company in the context of a merger, split or corporate reorganization processes.
 
All outstanding shares are entitled to one vote each and there are no preferred shares or any privilege.

Shareholders’ Agreement
 
As a result of changes in the shareholding of our controlling company, CIESA, a shareholders’ agreement was signed on May 17, 2011 (“Shareholders’ Agreement”). This agreement governs certain matters relating to shareholder participation in CIESA and in us. This agreement grants the shareholders different rights and obligations with respect to us and CIESA, mainly regarding the designation of the members of our Board of Directors and our Statutory Committee.

The following table shows the current CIESA’s shareholding:
 
Shareholder
 
Number of
shares
  
Class of
shares
 
Ownership
(%)
 
Pampa Energía S.A.
  
319,409,348
   A
 		  
50%
PEPCA S.A.
  
63,881,870
   B
 		  
10%
PCT L.L.C.
  
114,987,364
   B
 		  
18%
Grupo Inversor Petroquímica S.L.
  
140,540,114
   B
 		  
22%
Total
  
638,818,696
   
 		    
 
As reported in “Item 4. Our Information—A. Our History and Development—General—Controlling shareholders,” the control of CIESA / tgs is divided into two groups, on the one hand Pampa Energía, and, on the other hand, GIP and PCT. Thus, CIESA is under joint control between Pampa Group and GIP/PCT Group.

Transfers of Our Shares. Sales or transfer of our Class A shares must be approved by the affirmative vote of the shareholders representing at least sixty percent (60%) of the ordinary voting shares issued by CIESA.

Acts that require special approval of the Board of Directors. The Shareholders’ Agreement determines which decisions must be approved by an absolute majority of our Directors, including, among others: (i) the approval of the sale of assets outside the ordinary course of business; (ii) the approval of the annual budget and any modification thereof; (iii) approval to borrow or incur operating expenses in an amount that exceeds, in both cases, more than 10% of the amount approved in the annual budget; (iv) the approval to establish or modify wage and compensation policies; and (vi) the termination or extension of the SATFO.
156
Changes in the shareholders’ structure of CIESA
 
For more information to respect of the changes in the shareholding composition of CIESA see above. On its behalf, the mentioned share changes were duly authorized by ENARGAS and by the National Commission of Defense of Competition of Argentina.

Repurchase of Shares
 
On May 9, 2018, our Board of Directors approved the first program for the acquisition of our shares in the open market. Since then, our Board of Directors has approved new share repurchase programs. For additional information, see “Item 16E.Purchases of Registered Equity Securities of the Issuer by the Issuer and Affiliated Purchasers.”

As of December 31, 2021, we had 41,734,225 treasury shares, representing 5.25% of the total share capital. Their acquisition cost in the market amounted to Ps. 97,455 million (together with the trading premium on treasury stock of Ps. 28,271 million) which, in accordance with the provisions of Title IV, Chapter III, article 3.11.c) and e) of the CNV Rules, restricts the amount of the realized and liquid gains mentioned above that we may distribute to our shareholders.

On April 4, 2022, the Shareholders Meeting approved the extension of the holding period for treasury shares in the portfolio was approved for three years starting from their expiration. The Annual General, Special and Class Shareholders’ Meeting held on April 30, 2025 approved: (1) to reduce our capital due to the cancellation of our treasury shares for an amount of Ps. 41,734,225, representing 41,734,225 Class B book-entry shares of a nominal value of Ps. 1 each and entitled to one vote per share.

B. Related Party Transactions
 
Transactions with related parties are carried out in the ordinary course of business according to common practices and in accordance with applicable laws and regulations.
 
SATFO
 
Pampa Energía is our technical operator, according to the approval of ENARGAS in June 2004, and subject to the terms and conditions of the SATFO which provides that Pampa Energía is in charge of providing services related to the operation and maintenance of the natural gas transportation system and related facilities and equipment, to ensure that the performance of the system is in conformity with international standards and in compliance with certain environmental standards. Pursuant to this agreement, Pampa Energía, also provides financial advice to us. For these services, we pay a fixed annual amount or a monthly fee based on a percentage of our operating income, the higher of the before mentioned. At the Shareholders Meeting held on October 17, 2019, certain modifications to the amount and term of this agreement were approved. For additional information see “Item 4. Our Information—B. Business Overview—Natural Gas Transportation—Pipeline Operations—Technical Assistance Services Agreement.”
 
157
Commercial transactions
 
In the normal course of business, we carry out transactions with related parties of the following nature:

•
agreements for the purchase of natural gas used as RTP;
 

 		•
natural gas transportation services;
 

 		•
liquids sales; and
 

 		•
The board of directors approved the formation of the UT together with SACDE. The corporate purpose of the UT is to assembly of pipes for the construction of the project of “Expansion of the Natural Gas Transportation and Distribution System” in the province of Santa Fé, called through National Public Bid No. 452-0004-LPU17 by the former MINEM (“Santa Fe Work”).
 

 		•
On October 27, 2017, tgs - SACDE UT executed the corresponding work contract with the former MINEM. UT will continue to exist until its purpose has been fulfilled, that is, once the work involved in the Santa Fe Work and until the end of the warranty period, set at 18 months from the provisional reception.
 
In addition, we have entered into a UT operation with SACDE through which work related to the construction of the Regional II - Recreo / Rafaela / Sunchales Gas Pipeline will be carried out. Construction works are still in progress.
 
Leasing with Pampa Energía
 
On August 11, 2016, we entered into a financial lease with Pampa Energía. The term of the agreement is for 10 years and it determines that during nine years and 11 months we will pay Pampa Energía a monthly fee of US$623,457, before taxes. A purchase option is established on the leased property in our favor to be exercised within 30 days prior to the termination of the agreement.

The objective of this financial lease was to finance the acquisition of property, plant and equipment located in the Río Neuquén hydrocarbon area for a net book value of Ps. 6,027 million, which allowed us to expand our midstream services provided in that area.

The details of significant transactions with related parties as of December 31, 2025, are as follows:
158
Revenues
  
 		      
Costs
  
Financial results
 
Company
 
Natural Gas Transportation
  
Production
and
commercialization of
Liquids
  
Midstream
  
Telecommunications
  
Gas
purchase
and others
  
Compensa-tion
for
technical
assistance
  
Revenues
for administrative
 services
  
Selling
expenses
  
Interest
expenses
  
Interest income
/ fair value
results
 
     
(in thousands of pesos)
       
Controlling
shareholder:
                              
CIESA  
  
-
   
-
   
-
   
-
   
-
   
-
   
136
   
-
   
-
   
-
 
Company which
exercises joint
control on the
controlling
shareholder:
                                        
Pampa Energía
  
29,318,365
   
14,755,983
   
95,856,234
   
233,981
   
44,632,804
   
32,931,332
   
-
   
-
   
911,655
   
-
 
tgs´ associates
with significant
influence:
                                        
Link  
  
-
   
-
   
394,520
   
-
   
-
   
-
   
-
   
-
   
-
   
-
 
Other related
companies:
                                        
SACDE.  
  
-
   
-
   
-
   
82,377
   
-
   
-
   
-
   
-
   
-
   
-
 
Comercializadora e
inversora S.A.
  
-
   
-
   
-
   
-
   
-
   
-
   
-
   
-
   
-
     
Transener S.A.
  
-
   
-
   
339
   
-
   
-
   
-
   
-
   
-
   
-
   
-
 
CT Barragan
  
-
   
-
   
147,935
   
-
   
-
   
-
   
-
   
-
   
-
   
1,022,407
 
Fundación tgs
  
-
   
-
   
-
   
-
   
-
   
-
   
-
   
867,143
   
-
   
-
 
Total
  
29,318,365
   
14,755,983
   
96,399,028
   
316,358
   
44,632,804
   
32,931,332
   
136
   
867,143
   
911,655
   
1,022,407
 

Additionally, during the year ended December 31, 2025, the Company received construction engineering services for Ps. 85,972,947 from SACDE, which are capitalized within the balance of property, plant and equipment.

For additional information regarding revenues, costs, and outstanding balances relating to transactions with related parties as of and for the year ended December 31, 2025, see Note 21 to our Financial Statements included in this Annual Report on Form 20-F.
 
C. Interests of Experts and Counsel

Not applicable.

Item 8. 
Financial Information
 
A. Consolidated Statements and Other Financial Information
 
Our Financial Statements, which are set forth in the index to Financial Statements in Item 18, are filed as part of this Annual Report.
 
Exports
 
For additional information regarding our exports, see “Item 4. Our Information—B. Business Overview—Liquids Production and Commercialization.”
 
Legal and Regulatory Proceedings
 
In addition to the matters discussed below, we are a party to certain lawsuits and administrative proceedings arising in the ordinary course of business. Although no assurances can be given, we believe we have meritorious defenses, which we will assert vigorously to challenge all claims, and that possible liabilities from these claims will not have a material adverse effect on our consolidated financial position or results of operations.
 
159
Tax Claims
 
Action for annulment of ENARGAS Resolutions
 
On April 12, 2012, we filed pleadings before the National Court of First Instance in Federal Administrative Litigation No. 1 (“Court”) seeking (i) the declaration of unconstitutionality of the Decree No. 2,067/2008 and the Gas Charge Resolutions, and (ii) the annulment of any rule or act, issued or to be issued therefrom, by which the charge to finance the importation of natural gas (“Charge 2067’) was created and updated.
 
On July 5, 2012, the Court granted our requested preliminary injunction ordering the suspension of Charge 2067 under the terms of the Gas Charge Resolutions. This measure, challenged by the Government on several occasions, was initially granted for six months, but subsequently renewed.
 
On September 19, 2017, a new extension was granted, preventing the Government from demanding the amounts arising from the new value of Charge 2067 from us for the period of November 2011 to March 2016. This preliminary injunction extension ran until March 2018 —or until a final judgment is issued, whichever occurred first—.
 
The Court granted a total of 12 extensions of the preliminary injunction. The latest extension was dated December 1, 2020, and expired on July 1, 2021. In light of the procedural stage of the appeal against the Court of Appeals’ ruling, we did not request a new extension.
 
Resolution No. 28/2016 rendered ineffective the acts determining the value of the Charge 2067. Therefore, as from April 1, 2016, ENARGAS and the collecting agency ceased to charge the increase established by the Gas Charge Resolutions.
 
On March 26, 2019, the Court ruled the unconstitutionality and consequent nullity of Articles 53 and 54 of Law 26,784, Decree No. 2,067/2008, the Gas Charge Resolutions, and any act aimed at enforcing those provisions. The Government appealed on March 29, 2019. The appeal was granted on April 3, 2019.
 
The National Court of Appeals in Federal Administrative Litigation rejected the extraordinary appeal filed by the Government, which sought to have our claim declared moot based on the Alliance precedent of the Argentine Supreme Court of December 2014. Subsequently, on May 14, 2021, the Chamber I of the Court of Appeals (i) reversed the lower court’s decision and (ii) ruled that litigations costs be borne as incurred by each party. We filed a federal extraordinary appeal on June 4, 2021. The Court of Appeals granted the appeal on July 14, 2021, considering that the case involves the interpretation of federal regulations (Decree No. 2067/08, MINPLAN Resolution No. 1451/2008, Gas Charge Resolutions, and Sections 53 and 54 of Law No. 26,784). The Government responded on June 16, 2021, and ENARGAS did so on June 24, 2021.
 
Our management, with the advice of its external counsel, believes we have strong legal arguments and that a ruling on substantive matters favorable to us likely, based on the following considerations: (i) the preliminary injunction issued and its 12 extensions, (ii) the favorable first-instance ruling, (iii) the existence of favorable precedents by the Supreme Court in similar cases (other natural gas processors), and (iv) the granted federal extraordinary appeal. Consequently, no provision has been established for the potential liability arising from the increase of the Charge 2067 applicable to natural gas consumption related to the Cerri Complex during the period between the date of the issuance of the preliminary injunction and April 1, 2016.
 
160
Regarding the last extension of the preliminary injunction, which expired on July 1, 2021, we have not requested a new extension due to the early procedural stage of the appeal filed against the appellate court ruling. On December 16, 2024, the case file was forwarded to the Office of the Attorney General, with no updates received as of the date of this Annual Report.
 
Given the complex procedural instance, the nature of the Charge 2067, the background information presented in this and other legal cases initiated against the Charge 2067, at the date of this Annual Report it is not possible to make a definitive quantification of the amount that we should pay in the event of an unfavorable ruling by the Supreme Court, while an eventual request for payment in the current circumstances may be challenged and questioned by us within the framework of the corresponding administrative and judicial instances, where the amount may be debated of the charge that is eventually required to us.
 
Other Litigation
 
Below is a description of certain other litigation in which we are involved. No assurances can be provided as to the outcome of these proceedings.
 
Environmental matters
 
We are subject to extensive environmental regulations in Argentina. Our management believes that our current operations are in material compliance with applicable environmental requirements, as currently interpreted and enforced. We have not incurred in material environmental liabilities as a result of our operations to date. As of December 31, 2025 and 2024, the total amount of these provisions amounted to Ps. 91.9 million and Ps. 119.8 million, respectively.

Others
 
In addition to the matters discussed above, we are a party to certain lawsuits and administrative proceedings which involve taxation, labor claims, social security, administrative and others arising in the ordinary course of business. Our management and our legal advisors estimate that the outcome of these differences will not have significant adverse effects on our financial position or results of operations. As of December 31, 2025 and 2024, the total amount of these provisions amounted to Ps. 864.1 million and Ps. 434.1 million, respectively.
 
Dividend Distribution Policy
 
According to the General Companies Act, dividends may be lawfully declared and paid only out of retained earnings reflected in the financial statements that have been approved by shareholders, if losses for prior fiscal years have been absorbed, if the applicable payment has been expressly approved by our shareholders and applicable legal reserves have been created, as described below.
 
To that effect, every year our Board of Directors must submit our financial statements for the immediately preceding fiscal year, together with reports thereon by our statutory committee (“Statutory Committee”), for the consideration and approval of the shareholders at the General Annual Shareholders’ Meeting which must approve our annual financial statements and determine the allocation of net income for such year, within four months of the close of the fiscal year, that is, before April 30 of each year. Pursuant to the General Companies Act and the CNV Rules, we are required to allocate a legal reserve (“Legal Reserve”) equal to at least 5% of each year’s net income (as long as there are no losses for prior fiscal years pending to be absorbed) until the aggregate amount of such Legal Reserve equals 20% of the sum of (i) “common stock nominal value” plus (ii) “inflation adjustment to common stock,” as shown in our consolidated statement of changes in equity. If there are any losses pending to be absorbed from prior fiscal years, such 5% should be calculated on any excess of the net income over such losses, if any. Dividends may not be paid if the Legal Reserve has been impaired, nor until it has been fully replenished. The Legal Reserve is not available for distribution as a dividend.
161
Pursuant to our Bylaws, after the allocation to the Legal Reserve has been made, an amount will be allocated to pay dividends on preferred stock, if any, and an amount equal to 0.25% of the net income for the year will be allocated to pay the statutory employee profit-sharing. The balance of the retained earnings for the year may be distributed as dividends on common stock or retained as a voluntary reserve, as determined at the General Annual Shareholders’ Meeting. For information on dividend taxation, see “Item 10. Additional Information—E. Taxation.”

In addition, under the General Companies Act, our shareholders may establish additional voluntary reserves from time to time and for different purposes. Once established, the terms and conditions of any voluntary reserve cannot be changed without the prior approval of the shareholders.
 
In our Board of Directors meeting held on December 18, 2019, the Board approved a written dividend policy. This policy provides that in making its evaluation, our Board of Directors should consider our financial results, our liquidity, our future financing needs and other information, including economic and financial projections for both our and the economy as a whole. Each year, our Board evaluates whether to submit a distribution proposal to the shareholders’ meeting.
Nevertheless, there are a number of restrictions that limit our ability to distribute dividends, including:


 		•
Per the Tax Reform, for fiscal periods beginning on January 1, 2018, distribution of dividends made to human persons and foreign beneficiaries are subject to a tax withholding which we must withhold and enter to the tax authority as a single and definitive payment when the dividends are paid. This additional tax will be 7% or 13%, depending on whether the dividends distributed correspond to earnings of a fiscal period at the enacted income tax rate of 30% or 25%, respectively. For these purposes it is considered, without admitting proof to the contrary, that the dividends that are made available correspond, firstly, to the oldest accumulated earnings.
 

 		•
The acquisition of treasury shares and the additional paid-up capital for the distribution of treasury shares in accordance with CNV Rules, restricts the amount of the retained earnings that the Company may distribute. See “Item 7. Major Shareholders and Related Party Transactions—A. Major Shareholders—Shareholders’ Agreement—Repurchase of Shares.”
 

 		•
According to the BCRA regulations, under certain conditions, we have to obtain its previous authorization before transferring dividend payments outside of Argentina. For additional information see “Item 10. Additional Information—D. Exchange Controls.”
162
Further, our ability to make dividend payments may be limited by covenants in our existing debt instruments or in debt instruments we enter into in the future, and by our subsidiaries’ ability to generate income and cash flows to pay dividends to us. In particular, under the indenture dated July 24, 2024 (“2031 Notes Indenture”), entered into with Delaware Trust Company as trustee, co-registrar, paying agent and transfer agent, and Banco Santander Rio S.A., as registrar, Argentine paying agent, Argentine transfer agent and representative of the trustee in Argentina, relating to the issuance of our medium-term note program 8.500% senior notes due 2031 (“2031 Notes”), we may pay dividends as long as immediately after giving effect to such dividend payment we are able to incur at least US$1.00 (other than “Permitted Indebtedness” as defined in the 2031 Notes Indenture) under the limitation of debt covenant of the 2031 Notes Indenture. To incur debt (other than Permitted Indebtedness), the 2031 Notes Indenture requires that (i) no default exists under the 2031 Notes Indenture at the time of such incurrence and (ii) (a) the Consolidated Coverage Ratio (as defined in the 2031 Notes Indenture, which is the ratio of our consolidated adjusted EBITDA to our consolidated interest expense) would be greater than or equal to 2.0:1.0; and (b) the Consolidated Debt Ratio (as defined in the 2031 Notes Indenture, which is the ratio of our consolidated total indebtedness to our consolidated adjusted EBITDA) would be less than or equal to 3.50:1.0.
 
Further, under the indenture dated November 20, 2025 (“2035 Notes Indenture”), entered into with CSC Delaware Trust Company as trustee, co-registrar, principal paying agent and transfer agent, and Banco Santander Rio S.A., as registrar, Argentine paying agent, Argentine transfer agent and representative of the trustee in Argentina, relating to the issuance of our 7.750% senior notes due 2035 (“2035 Notes”), we may pay dividends as long as immediately after giving effect to such dividend payment we are able to incur at least US$1.00 (other than “Permitted Indebtedness” as defined in the 2035 Notes Indenture) under the limitation of debt covenant of the 2035 Notes Indenture. To incur debt (other than Permitted Indebtedness), the 2035 Notes Indenture requires that (a) (i) the Consolidated Coverage Ratio (as defined in the 2035 Notes Indenture, which is the ratio of Consolidated Adjusted EBITDA for the most recent four fiscal quarter period to Consolidated Interest Expense for such period, calculated on a pro forma basis as set forth in the Indenture) would be greater than or equal to 2.00:1.00; and (ii) the Consolidated Debt Ratio (as defined in the 2035 Notes Indenture, which is the ratio of Consolidated Total Indebtedness outstanding, net of Cash and Cash Equivalents, as of the end of the most recent fiscal quarter, to Consolidated Adjusted EBITDA for the most recent four fiscal quarter period, calculated on a pro forma basis as set forth in the Indenture) would be less than or equal to 3.50:1.00, and (b) no Default or Event of Default shall have occurred and be continuing at the time of, and after giving effect to, such Incurrence. See “Item 10. Additional Information—C. Material Contracts—Debt Obligations.”

Moreover, per CNV Rules the amounts subject to distribution are restricted up to the acquisition cost of treasury shares and the additional paid-up capital accounts balance as discussed elsewhere herein.

For additional information regarding dividend payment restrictions see “Item 3. Key Information—D. Risk Factors—Risks Relating to Our Shares and ADSs—Shareholders outside Argentina may face additional investment risk from currency exchange rate fluctuations in connection with their holding of our shares or ADSs represented by ADRs. Exchange controls imposed by the Government may limit our ability to make payments to the Depositary in U.S. dollars, and thereby limit ADR holders’ ability to receive cash dividends in U.S. dollars.”
A summary of the dividends declared and paid during the five most recent fiscal years is set forth below:

 
Dividends declared and paid
 
Year ended
December 31,
 
(in millions
of Ps.)(1)
  
(in millions
of US$)(2)
  
(Ps. per
share)(1)
  
(US$ per
share)(2)
  
(US$ per
ADS)(2)
 
2021                                    
  
-
   
-
   
-
   
-
   
-
 
2022                                    
  
-
   
-
   
-
   
-
   
-
 
2023                                    
  
-
   
-
   
-
   
-
   
-
 
2024                                    
  
-
   
-
   
-
   
-
   
-
 
2025                                    
  
231,152
   
172.4
   
307.07
   
0.23
   
1.15
 
(1)
Stated in pesos at Current Currency.
 
(2)
Stated in U.S. dollars translated from pesos at the exchange rate in effect on the payment date.
 
163
The Annual General, Special and Class Shareholders’ Meeting held on April 30, 2025, approved to allocate Ps. 24,347 million to the Legal Reserve and to create a Ps. 1,882,341 million “Reserve for capital expenditures, acquisition of treasury shares and/or dividends” (“2025 Reserve”) and to delegate to the Board of Directors the decision to use the 2025 Reserve to make investments, distribute dividends or repurchase stock.
 
At the Board of Directors’ meeting held on May 28, 2025, a cash dividend was approved totaling Ps. 231,152 million (equivalent to Ps. 307.07 per share), following the approval by the General, Special and Class Shareholders’ Meeting of April 30, 2025.
 
The amount of the 2025 Reserve will be restated in constant pesos at any given time pursuant to CNV Resolution No. 777/2018. To determine the maximum distributable amount out of the 2024 Reserve, the restated amount of the stock that has actually been repurchased and the additional paid-up capital must be determined in advance, since an amount equal to such stock already repurchased cannot be released to shareholders pursuant to the provisions of the CNV Rules.
 
B. Significant Changes
 
No undisclosed significant change has occurred since the date of our Financial Statements.
 
Item 9.
The Offer and Listing

A. Offer and Listing Details
 
Not Applicable.
 
B. Plan of Distribution
 
Not Applicable.
 
C. Markets
 
The Argentine Securities Market. In Argentina, the oldest and largest exchange is the Buenos Aires Stock Exchange (“BASE”), founded in 1854. The BASE was the exchange on which the majority of equity trades in Argentina were executed. BYMA is the result of an alliance between the BASE and Mercado de Valores de Buenos Aires S.A. (“MERVAL”), dated 2013. From April 17, 2017, all the shares previously listed in the MERVAL were transferred to BYMA without any further consequence for listed companies.

Securities may also be listed and traded through over-the-counter market brokers who are linked to an electronic reporting system. The activities of such brokers are controlled and regulated by A3 Mercados S.A. (“A3 Mercados”), an electronic over-the-counter market reporting system that functions independently from the BYMA. Under an agreement between the BASE and the A3 Mercados, trading in equity and equity-related securities is conducted exclusively on the BASE (now BYMA) and trading in corporate debt securities is conducted on both the MERVAL/BASE (now BYMA) and A3 Mercados. Trading in Government securities, which are not covered by the agreement, may be conducted on either or both of the BYMA and A3 Mercados. The agreement does not extend to other Argentine exchanges.
164
Changes to the legal framework of securities trading have been introduced, permitting issuance and trading of new, non-bank financial products in the Argentine capital markets, including commercial paper, new types of corporate bonds, futures and options. The Government deregulated brokerage fees and eliminated transfer and stamp taxes on securities transactions in November 1991.

The Capital Markets Law, enacted in December 2012, sets out the rules to govern capital markets, its players, and the securities traded therein subject to the CNV regulation and monitoring. On May 9, 2018, the Argentine Congress approved the Act on Productive Financing No. 27,440, which introduces significant reforms to the Capital Markets Law, the Law on Common Investment Funds No. 24,083, the Argentine Law No. 23,576, as amended by Argentine Law No. 23,962 (“Negotiable Obligations Law”), and other regulations, with the objective of promoting the development of the local capital market. Among other items, the new law seeks to broaden the base of investors and companies that can participate in the capital market, promoting productive financing, especially with respect to micro, small and medium enterprises, creating a regime that promotes and facilitates their access to financing. Likewise, this law provides for the modification of certain tax provisions, tax regulations, regulations related to derivative instruments and a program for the promotion of financial inclusion. The reforms also establish some limitations to the powers granted to the CNV by the Capital Markets Law.

The Capital Markets Law provides rules and provisions guided by the following goals and principles:


 		•
Promoting the participation of small investors, union associations, industry groups and trade associations, professional associations and all public savings entities in the capital market, particularly encouraging mechanisms designed to promote domestic savings and channel such funds towards the development of production;
 

 		•
Strengthening mechanisms for the protection of and prevention of abuses against small investors and for the protection of consumers’ rights;
 

 		•
Promoting access of small- and medium-sized companies to the capital market;
 

 		•
Fostering the creation of a federally integrated capital market through mechanisms designed to achieve an interconnection of computer systems from different trading markets, with the use of state-of-the-art technology; and
 

 		•
Encouraging simpler trading procedures available to users to attain greater liquidity and competitiveness in order to provide the most favorable conditions for the implementation of transactions.
 
The CNV is a self-administered agency of the Government with jurisdiction covering the territory of Argentina, governed by the provisions contained in the Capital Markets Law and the CNV Rules, among other related statutory regulations. The relationship of the CNV and the Argentine Executive Branch is maintained through the Ministry of Finance, which shall hear any appeals filed against decisions made by the CNV, notwithstanding any other legal actions and remedies contemplated in the Capital Markets Law.
 
The CNV supervises and regulates the authorized markets in which the securities and the collective investment products are traded, the corporations authorized in the public offer regime, and all the other players authorized to operate in the public offer regime, as the registered agents, the trading agents, the financial advisors, the underwriters and distributors, the brokers, the settlement and clearing agents, the managers of collective investment products, the custodians of collective investment products, the collective depositories, and the risk rating agencies, among others.

165
BYMA. Pursuant to the Capital Markets Law, the CNV has authorized nine stock markets since September 2014. BYMA is a private entity whose stock capital is composed of publicly traded shares. On December 29, 2016, BYMA was authorized by CNV as a market, Registry No. 639. BYMA’s main functions comprise trading as well as performing as a Clearing House and Central Counterparty (CCP) in the settlement and monitoring of transactions carried out through its trading systems.

BYMA’s main functions under the Capital Markets Law are as follows:

•
issue regulations that allow stock brokers and brokerage firms authorized by the CNV to perform their duties;
 

 		•
authorize, suspend and cancel the listing and/or trading of negotiable securities pursuant to the provisions set forth in its bylaws;
 

 		•
issue regulations that ensure veracity in the record of prices and trades;
 

 		•
issue the regulations and policies deemed necessary to ensure transparency in the trades conducted by member stock brokers;
 

 		•
fix the margins that member brokers are to comply with for each type of trade BYMA guarantees; and
 

 		•
set up arbitration tribunals.
 
These powers may be exercised by BYMA or delegated, in whole or in part, to other qualified entities. Accordingly, BYMA has entered into an agreement with BASE to enforce items b) and f), due to the fact that BASE has been authorized to operate as a qualified entity, pursuant to Capital Markets Law.
 
New York Stock Exchange. The ADSs, each representing five Class B Shares, are listed on the NYSE under the trading symbol “TGS.” The ADSs began trading on the NYSE in November 1994, and have been issued by the Depositary.
 
According to data provided by the Depositary, as of March 31, 2026, there were 18,052,759 ADSs outstanding. Such ADSs represented approximately 11.99% of the total number of issued and outstanding Class B Shares as of such date.
 
Market Capitalization. Investors in the Argentine securities market are primarily individuals, companies and institutional investors consisting of a limited number of mutual funds.

D. Selling Shareholders
 
Not applicable.

E. Dilution
 
Not applicable.
 
F. Expenses of the Issue
 
Not applicable.
 
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Item 10.
Additional Information

A. Share Capital
 
Not applicable.

B. Memorandum and Articles of Association
 
Information contained in Item 14 of our Registration Statement on Form F-1 (Registration No. 33-85178) is hereby incorporated by reference.
 
Bylaws amendments
 
The Annual General, Special and Class Shareholders’ Meeting held on April 30, 2025 approved to amend sections 5 and 6 and eliminate section 13 of our Bylaws in order to:
 
(i) Establish that Class A shares shall represent 51% or more of the capital stock, while Class B shares shall represent the remaining capital stock.
 
(ii) Eliminate from our Bylaws any reference to Class C shares as there no longer exist any Class C shares.
 
(iii) Include the possibility to convert Class A shares into Class B shares, as long as Class A shares continue to represent at least 51% of the capital stock after conversion.


 		•
Consolidated version of our Bylaws which as amended is presented below:

SECTIONS REPLACED
 
AMENDMENT ADOPTED
 
SECTION 5. The capital stock and its evolution shall be recorded in the Company’s financial statements as it may result from the capital increases registered with the Public Registry of Commerce and shall be represented by common Class A, Class B and Class C shares. The capital stock may be increased by decision of the Shareholders’ Meeting without any limitation and without the need to amend the Bylaws. Shares shall be issued in book-entry form, of a nominal value of One (1) Peso each and entitled to One (1) vote per share. Class C Shares shall remain under the regime of the Stock Ownership Program [Programa de Propiedad Participada] in compliance to the provisions of Chapter III of Law 23,696. Class C shares for which the purchase price has been fully paid by purchaser, may be converted into Class B shares at the request of the holders thereof, after three years have elapsed from the organization of the Corporation.-
 
SECTION 5. The capital stock and its evolution shall be recorded in the Company’s financial statements as it may result from the capital increases registered with the Public Registry of Commerce and shall be represented by common Class A and Class B and Class C shares. The capital stock may be increased by decision of the Shareholders’ Meeting without any limitation and without the need to amend the Bylaws. Shares shall be issued in book-entry form, of a nominal value of One (1) Peso each and entitled to One (1) vote per share. Class C Shares shall remain under the regime of the Stock Ownership Program [Programa de Propiedad Participada] in compliance to the provisions of Chapter III of Law 23,696. Class C shares for which the purchase price has been fully paid by purchaser, may be converted into Class B shares at the request of the holders thereof, after three years have elapsed from the organization of the Corporation.-
 
167

 		SECTIONS REPLACED  AMENDMENT ADOPTED 
SECTION 6. The issue of common shares corresponding to future capital increases shall be made in the following proportion: − FIFTY-ONE PER CENT (51%): Class A shares and FORTY-NINE PER CENT (49%): the addition of Class B and Class C shares, and the same proportion existing between these two classes at the moment such issue was decided shall be maintained. Class A, Class B and Class C shareholders shall be entitled to preemptive rights in the subscription for new shares to be issued by the Company, within their same class and in proportion of their respective holdings, and they shall be entitled to exercise purchase option pursuant to Section 194 et seq. of Law No. 19,550. Should any balance of unsubscribed shares remain, such shares may be offered to third parties. When Class C shares are issued and offered for subscription, the term of payment shall be the maximum term authorized by law.-
 
SECTION 6. The issue of common shares corresponding to future capital increases shall be made in the following proportion: − FIFTY-ONE PER CENT (51%): Class A shares and FORTY-NINE PER CENT (49%): the addition of Class B and Class C shares, and the same proportion existing between these two classes at the moment such issue was decided shall be maintained. Class A shares shall represent FIFTY-ONE PERCENT (51%) or more of the capital stock, while Class B shares shall represent the remaining capital stock. Class A and Class Band Class C shareholders shall be entitled to preemptive rights in the subscription for new shares to be issued by the Company, within their same class and in proportion of their respective holdings, and they shall be entitled to exercise purchase option pursuant to Section 194 et seq. of Law No. 19,550. Should any balance of unsubscribed shares remain, such shares may be offered to third parties. When Class C shares are issued and offered for subscription, the term of payment shall be the maximum term authorized by law.- The Company’s Board of Directors, at the request of Class A shareholders, may convert common Class A shares into common Class B shares, provided that, at the time of conversion, no regulatory restrictions exist and that, following such conversion, Class A shares continue to represent at least 51% of the capital stock.
 
168
 SECTIONS REPLACED  AMENDMENT ADOPTED 
 
SECTION 13. Pursuant to the Stock Ownership Program referred to in Section 5, the Corporation shall issue, in favor of its employees belonging to any hierarchy, Employees’ Participation Bonds pursuant to the terms of article 230 of Law 19,550 (R.T. Decree number 841/84), so as to distribute among beneficiaries a percentage of the profits for the year, after taxes, equivalent to ZERO POINT TWENTY-FIVE PER CENT (0.25%). Interests corresponding to the bonds shall be paid to beneficiaries at the time payment of dividends is made. Certificates representing Employees’ Participation Bonds shall be delivered by the Corporation to the holders thereof. Such Employees’ Participation Bonds shall be personal and non-transferable and ownership thereof shall terminate at the time the labor relationship concludes, regardless of the reason, and the same shall not grant to other bondholders any right to accretion. The Corporation shall issue a numbered certificate for each holder, which shall bear the quantity of bonds corresponding thereto. Such certificate shall be required to exercise bondholder’s rights. Each payment shall be evidenced therein. Bond issue conditions shall only be modified by resolution adopted in a special Meeting called pursuant to the terms of articles 237 and 250 of the Companies Act. Interest corresponding to bondholders shall be calculated as expenses and shall be due under the same conditions than the dividends. In case of issue of shares corresponding to future capital increases in which Class “C” shares had not been fully paid-in, up to 50% of the interest corresponding to each holder of class “C” shares could be applied to the payment of the balance owed.-
  
SECTION 13. Pursuant to the Stock Ownership Program referred to in Section 5, the Corporation shall issue, in favor of its employees belonging to any hierarchy, Employees’ Participation Bonds pursuant to the terms of article 230 of Law 19,550 (R.T. Decree number 841/84), so as to distribute among beneficiaries a percentage of the profits for the year, after taxes, equivalent to ZERO POINT TWENTY-FIVE PER CENT (0.25%). Interests corresponding to the bonds shall be paid to beneficiaries at the time payment of dividends is made. Certificates representing Employees’ Participation Bonds shall be delivered by the Corporation to the holders thereof. Such Employees’ Participation Bonds shall be personal and non-transferable and ownership thereof shall terminate at the time the labor relationship concludes, regardless of the reason, and the same shall not grant to other bondholders any right to accretion. The Corporation shall issue a numbered certificate for each holder, which shall bear the quantity of bonds corresponding thereto. Such certificate shall be required to exercise bondholder’s rights. Each payment shall be evidenced therein. Bond issue conditions shall only be modified by resolution adopted in a special Meeting called pursuant to the terms of articles 237 and 250 of the Companies Act. Interest corresponding to bondholders shall be calculated as expenses and shall be due under the same conditions than the dividends. In case of issue of shares corresponding to future capital increases in which Class “C” shares had not been fully paid-in, up to 50% of the interest corresponding to each holder of class “C” shares could be applied to the payment of the balance owed.-
 

C. Material Contracts
 
Debt Obligations
 
2031 Notes

On July 24, 2024, we issued the 2031 Notes in the aggregate principal amount of US$490 million, the proceeds of which were used to redeem all of our then outstanding 6.750% of the 2025 Notes pursuant to (i) a tender offer to purchase for cash (“Tender Offer”) any and all of our 2018 Notes launched on July 15, 2024, which expired on July 19, 2024, and (ii) the optional redemption provisions of the 2018 Indenture. On July 24, 2024, US$299,439,000 in aggregate principal amount of the 2018 Notes (or approximately 63.67% of the 2018 Notes then outstanding), were redeemed pursuant to the Tender Offer and the remaining 2018 Notes were redeemed on July 31, 2024, pursuant to the provisions of the 2018 Indenture.

The 2031 Notes were issued pursuant to the program, which provides for the issuance of up to a maximum principal amount of US$2,000 million in notes, and was authorized by resolutions of an extraordinary shareholders’ meeting dated April 25, 2013, April 13, 2017, and April 19, 2023, and by resolutions of our Board of Directors adopted on July 23, 2013, December 23, 2013, June 29, 2017, August 7, 2023, and July 15, 2024. The program was also authorized by the CNV by Resolution No. 17,262 dated January 3, 2014, Resolution No. 18,938 dated September 15, 2017, and Resolution No. DI-2023-52-APN-GE# dated October 11, 2023.
The scheduled maturity date of the 2031 Notes is July 24, 2031. The 2031 Notes accrue interest at an annual fixed rate of 8.500%, payable semiannually.

169
We are also permitted to redeem the 2031 Notes in whole, but not in part, at a price equal to 100% of the principal amount outstanding if, as a result of any change in, or amendment to, the laws or regulations of Argentina or any governmental authority thereof or therein having power to tax or as a result of any change in the application or official interpretation of such laws or regulations, we become obligated to pay additional amounts with respect to the 2031 Notes and cannot avoid such obligation by taking reasonable measures available to us.
 
In the event that the Republic of Argentina, directly or indirectly, through any one or more controlled entities, as a result of a condemnation, nationalization, confiscation, seizure, compulsory acquisition, expropriation or otherwise under power of eminent domain becomes the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act) of at least 51% of our outstanding shares with voting power, holders of the 2031 Notes are entitled to require us to purchase all or a portion of the 2031 Notes at a price in cash equal to 101% of the principal amount of the 2031 Notes so purchased. The 2031 Notes are general, direct, unsecured and unsubordinated obligations and rank at all times pari passu in all respects, without any preference among themselves, with all of our other present and future unsecured and unsubordinated obligations, other than obligations preferred by statute or by operation of law.
 
Covenants
 
We are subject to several restrictive covenants under the terms of the 2031 Notes, which include, among others, the following:
 

 		•
limitations on our ability to terminate our License or take any action that, in our reasonable opinion, would result in the termination of the License. We may not agree to amend or waive any terms of the License unless such amendment or waiver would not, in our reasonable opinion, adversely affect (i) our ability to meet our obligations under the 2031 Notes on a timely basis or (ii) any material rights or interest of the trustee or the holders under the indenture or the 2031 Notes;
 

 		•
a requirement that we not enter into or consent to any amendment, restatement or modification of the SATFO or any successor agreement thereto, other than an amendment, restatement or modification that is not materially adverse to us and our subsidiaries, taken as a whole;
 

 		•
a limitation on our and our subsidiaries’ ability to create liens on our property, assets or revenues, other than certain permitted liens;
 

 		•
a limitation on our and our subsidiaries’ ability to incur additional indebtedness unless we meet certain financial ratios and no event of default exists, other than certain permitted indebtedness;
 

 		•
a limitation on our and our subsidiaries’ ability to pay dividends and making certain other restricted payments and investments with respect to any fiscal year or fiscal semester unless: (i) no event of default or potential event of default shall have occurred and be continuing and (ii) immediately after giving effect to such restricted payment, we would be able to incur at least US$1.00 of additional indebtedness pursuant to the limitation on indebtedness covenant;
 

 		•
limitations on our and our subsidiaries’ ability to enter into sale-leaseback transactions;
 

 		•
limitations on our and our subsidiaries’ ability to enter into a transaction with an affiliate, unless such transaction is on terms that are not materially less favorable to us or our subsidiary than we or such subsidiary would obtain in a comparable arm’s-length transaction with a non-affiliate;
170

 		•
a limitation on our and our subsidiaries’ ability to sell our assets; and
 

 		•
a limitation on our and our subsidiaries’ ability to enter into a merger, consolidation or similar transaction.

Events of Default
 
The 2031 Notes include the following events of default, among others:
 

 		•
default in the payment of principal, interest or any other amount due under the terms of the 2031 Notes after a specified grace period with respect to payments other than principal;
 

 		•
breach of obligations contained in the 2031 Notes after a specified cure period;
 

 		•
cross-default and cross-acceleration with respect to other debt obligations with an aggregate principal amount equal to or exceeding US$50 million;
 

 		•
the occurrence of certain bankruptcy events or enforcement proceedings;
 

 		•
enforcement of monetary judgments exceeding US$50 million; and
 

 		•
the occurrence of certain material adverse events with respect to our License, such as the revocation, suspension for a period of greater than 180 days or termination of the License.
 
2035 Notes

On November 20, 2025, we issued the 2035 Notes in the aggregate principal amount of US$500 million. The net proceeds from the issuance of the 2035 Notes are intended to be used for general corporate purposes, including the development of the GPM expansion project, in accordance with the requirements of Article 36 of the Argentine Negotiable Obligations Law.

Similarly to the 2031 Notes, the 2035 Notes were issued pursuant to our medium-term note program, which provides for the issuance of up to a maximum principal amount of US$2,000 million in notes. Authorization for the listing and trading of the 2035 Notes was requested from Bolsas y Mercados Argentinos S.A. (BYMA) and A3 Mercados S.A.

The scheduled maturity date of the 2035 Notes is November 20, 2035. The 2035 Notes accrue interest at a fixed annual rate of 7.750%, payable semi-annually in arrears on May 20 and November 20 of each year, beginning on May 20, 2026.

We are permitted to redeem the 2035 Notes, in whole but not in part, at a price equal to 100% of the principal amount outstanding, together with any accrued and unpaid interest and any additional amounts, if, as a result of any amendment to, or change in, the laws or regulations of Argentina or any relevant taxing jurisdiction, or any change in the application or official interpretation of such laws or regulations, we become obligated to pay additional amounts with respect to the 2035 Notes and cannot avoid such obligation by taking commercially reasonable measures available to us.

At any time and from time to time prior to November 20, 2030, we may redeem the 2035 Notes, in whole or in part, at a redemption price equal to the greater of 100% of the principal amount of the Notes to be redeemed and a make-whole amount, plus accrued and unpaid interest to the redemption date.

171
Covenants
 
We are subject to restrictive covenants under the terms of the 2035 Notes, including, among others, the following:


 		•
limitations on our ability to terminate our License or take any action that, in our reasonable opinion, would result in the termination of the License. We may not agree to amend or waive any terms of the License unless such amendment or waiver would not, in our reasonable opinion, adversely affect (i) our ability to meet our obligations under the 2035 Notes on a timely basis or (ii) any material rights or interests of the trustee or the holders under the indenture or the 2035 Notes;
 

 		•
a requirement that we not enter into or consent to any amendment, restatement or modification of the SATFO or any successor agreement thereto, except for amendments, restatements or modifications that are not materially adverse to us and our subsidiaries, taken as a whole;
 

 		•
a limitation on our and our subsidiaries’ ability to create liens on our property, assets or revenues, other than certain permitted liens;
 

 		•
a limitation on our and our subsidiaries’ ability to incur additional indebtedness unless we meet certain financial ratios and no event of default exists, other than certain permitted indebtedness;
 

 		•
a limitation on our and our subsidiaries’ ability to pay dividends and making certain other restricted payments and investments with respect to any fiscal year or fiscal semester unless: (i) no default or event of default shall have occurred and be continuing at the time of, or after giving effect to, such restricted payment; and (ii) immediately after giving effect to such restricted payment, we would be able to incur at least US$1.00 of additional indebtedness (other than permitted indebtedness) pursuant to the limitation on indebtedness covenant;
 

 		•
limitations on our and our subsidiaries’ ability to enter into sale-leaseback transactions;
 

 		•
limitations on our and our subsidiaries’ ability to enter into a transaction with an affiliate, unless such transaction is on terms that are not materially less favorable to us or our subsidiary than we or such subsidiary would obtain in a comparable arm’s-length transaction with a non-affiliate;
 

 		•
a limitation on our and our subsidiaries’ ability to sell our assets; and
 

 		•
a limitation on our and our subsidiaries’ ability to enter into a merger, consolidation or similar transaction.
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Events of Default
 
The 2035 Notes include the following events of default, among others:
 

 		•
default in the payment of principal, interest or any other amount due under the terms of the 2035 Notes after a specified grace period with respect to payments other than principal;

•
breach of obligations contained in the 2035 Notes after a specified cure period;
 

 		•
cross-default and cross-acceleration with respect to other debt obligations of us or a significant subsidiary with an aggregate principal amount equal to or exceeding US$75 million;
 

 		•
the occurrence of certain bankruptcy events or enforcement proceedings;
 

 		•
enforcement of monetary judgments exceeding US$75 million; and
 

 		•
the occurrence of certain material adverse events with respect to our License, such as the revocation.
 
Lease with Pampa Energía
 
On August 11, 2016, we entered into a financial lease agreement with Pampa Energía. Starting on such date and for a term of nine years and 11 months (“Leasing Payment Term”), Pampa Energía is leasing to us certain assets for a book value as of December 31, 2025, of Ps. 6,027 million, which we utilize in our Midstream business segment. Monthly lease payments to Pampa Energía amount to US$ 0.6 million, before taxes.

For additional information, see Note 13 to our Financial Statements included under “Item 18.  Financial Statements.”
 
D. Exchange Controls
 
The following is a description of the main regulations of the BCRA regarding capital inflows and outflows in Argentina. For further details on the full scope of the current foreign exchange control restrictions and regulations, investors should seek advice from their legal advisors and review the applicable regulations referenced in the 20-F, which are available on the Argentine Ministry of Economy website: https://www.argentina.gob.ar/economia, or on the BCRA website: www.bcra.gob.ar. None of the information contained on either website is incorporated by reference into this 20-F.
 
On September 1, 2019, the Government enacted Decree No. 609/2019 (as amended and/or modified, the “Decree 609”), which permanently imposed controls through Decree No. 91/2019. Through Decree 609/2019, the Executive Branch reinstated foreign exchange controls and authorized the BCRA to (a) regulate access to the Foreign Exchange Market for purchasing foreign currency and making payments abroad; and (b) establish regulations to prevent practices and transactions aimed at circumventing the measures adopted under Decree 609 through the use of securities and other instruments.
 
The consolidated text of the Foreign Exchange and External Sector Regulations is currently outlined in Communication “A” 8191 (as subsequently modified and supplemented by BCRA communications, the “Foreign Exchange Regime”). Below is a brief summary of the current foreign exchange control regulations.
 
The BCRA requested the CNV to implement aligned measures to prevent evasive practices and transactions. In this regard, the CNV, in line with Article 3 of Decree 609, established various measures to prevent such practices and transactions.

173
Specific Provisions for Inflows through the Foreign Exchange Market
 
Export of Goods
 
As a general rule, exporters of goods must bring in and settle foreign currency earnings in pesos through the Foreign Exchange Market within different timeframes depending on certain factors (type of exported products, relationship between exporter and importer, etc.). Regardless of the maximum timeframes established in each case, payments for exports must be brought in and settled in the Foreign Exchange Market within 20 (twenty) business days from the date of receipt. However, the ability to use this timeframe will be subject to compliance with the deadlines set forth in the Foreign Exchange Regime for each type of good.
 
Until April 2025, pursuant to Decree No. 28/2023 published on December 13, 2023, 80% of the foreign currency proceeds from exports had to be settled through the Foreign Exchange Market while the remaining 20% could be settled through securities transactions involving the purchase of securities settled in foreign currency and their subsequent sale settled in local currency within Argentina. On April 14, 2025, Decree No. 269/2025 repealed the Decree No. 28/2023 and expressly established that the foreign currency proceeds from such exports shall be governed by the general provisions set forth in the Decree 609 and its amending and supplementary regulations. Exporters of the goods included in the MERCOSUR Common Nomenclature (NCM) shall pay export duties, taxes, and other applicable charges pursuant to the terms, deadlines, and conditions set forth under the current regulations, applying the corresponding export duty rate based on the foreign exchange settlement regime described above.
 
If the client is a Unique Project Vehicle (“VPU”) adhered to the RIGI and has declared before the Ministry of Economy its intention to benefit from the provisions of Article 198 of the Foundations Law concerning the collection of export proceeds for goods and services, the income and settlement percentages set forth in Sections 14.1.1. and 14.1.2. of the Foreign Exchange Regime will apply, as appropriate.
 
Sale of Non-Produced Non-Financial Assets

The consideration received by residents for the sale of non-produced non-financial assets to non-residents must be brought into the country in foreign currency and settled in the Foreign Exchange Market within 20 (twenty) business days from the date of receipt of funds in Argentina or abroad, or their crediting to foreign accounts.
Regarding funds received or credited to foreign accounts, compliance with the entry and settlement requirement may be deemed met up to the equivalent amount of usual expenses debited by foreign financial entities for the transfer of funds to Argentina.
 
Export of Services
 
As a general rule, payments for services provided by residents to non-residents must be brought in and settled in the Foreign Exchange Market within a maximum period of 20 business days from the date of receipt abroad or in Argentina, or their crediting to foreign accounts. There are exceptions to the obligation to settle in the Foreign Exchange Market the foreign currency received as consideration for certain exports of specific services expressly contemplated in Section 2.2.2 of the Foreign Exchange Regime, subject to prior compliance with various requirements set forth therein for both individuals and legal entities.
 
If the client is a VPU adhered to the RIGI and has declared before the Ministry of Economy, the authority in charge of RIGI, its intention to benefit from the provisions of Article 198 of the Foundations Law (which establishes that such VPUs are not required to bring in or settle in the Foreign Exchange Market the foreign currency obtained for concepts other than the export of products, including services), the exception set forth in Section 14.1.3 of the Foreign Exchange Regime will apply. This section establishes that collections for services rendered to a non-resident by a VPU holding a project under the RIGI will be exempt from the requirement to bring in and/or settle the total foreign currency proceeds, provided that the service was rendered or accrued from the date of the VPU’s startup as reported by the Ministry of Economy to the BCRA.
 
174
Provided the requirements set forth in Section 7.9 of the Foreign Exchange Regime are met, collections for service exports may be used for the repatriation of direct investment contributions or the repayment of principal and interest on: (i) External Financial Indebtedness, (ii) publicly registered debt securities in Argentina that do not qualify as External Financial Indebtedness, denominated in foreign currency and whose services are payable in foreign currency, provided that the total funds obtained have been settled in the Foreign Exchange Market.
 
Additionally, provided that the specific requirements established in Sections 3.11.3 and 7.9.5 of the Foreign Exchange Regime are met, it is allowed for collections from service exports to be accumulated in accounts opened in local or foreign financial institutions, for the amounts required in debt contracts, to guarantee the payment of capital and interest services of External Financial Indebtedness and/or debt securities registered in Argentina that do not qualify as External Financial Indebtedness, denominated in foreign currency and whose services are payable in foreign currency, provided that the total funds obtained have been settled in the Foreign Exchange Market.
 
Specific Provisions for Outflows through the Foreign Exchange Market

Import of Goods and Services
 
Regarding access to the Foreign Exchange Market for the payment of imports of goods with Customs Entry registration from December 13, 2023, the following must be verified:
 
 1.
Payment deadlines, regarding to import transactions registered prior to April 14, 2025, shall be as follows: (a) From the date of customs entry registration, payment may be made for the following goods, among others: petroleum gases and other gaseous hydrocarbons (subchapter 2711 of the NCM). (b) For all other goods, payment may be made starting 30 (thirty) calendar days from the date of customs entry registration.
 

 		2.
Pursuant to the provisions of Communication “A” 8226, for the importation of all types of goods registered as from April 14, 2025, the term established under this section shall be reduced to zero calendar days as from the date of customs clearance (registro de ingreso aduanero)
 

 		3.
Deferred payments for new imports of goods with customs entry registration from December 13, 2023, before the deadlines established in point (1) above, may be processed when, in addition to complying with other applicable regulatory requirements, the payment falls within the situations provided for in Section 10.10.2 of the Foreign Exchange Regime, which covers various types of financing.
 

 		4.
Payments for imports with pending customs registration require prior approval from the BCRA, except when, in addition to complying with all other applicable requirements, the payment falls within the situations outlined in Section 10.10.2 of the Foreign Exchange Regime.

5.
Payments for imports of goods with customs entry registration before December 12, 2023, require prior approval from the BCRA, except for the exceptions detailed in Section 10.11 of the Foreign Exchange Regime.
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For the payment of services provided by non-residents, the following provisions apply:
 

 		1.
Entities may grant access to the Foreign Exchange Market without prior approval from the BCRA to make payments for services provided by non-residents, as well as for new imports of services rendered or accrued from December 13, 2023, when it is verified that, in addition to meeting all other applicable regulatory requirements, the payment falls within specific situations.
 

 		2.
Regarding services provided by non-residents rendered and/or accrued until December 12, 2023, prior approval from the BCRA will be required, except for specific exceptions.

Formation of External Assets and Derivative Transactions
 
In general, prior approval from the BCRA is required for the formation of external assets (e.g., purchase of foreign currency, among others) and for derivative transactions carried out by legal entities that are not authorized exchange operators, local governments, mutual funds, and other legal structures established in Argentina.
 
Debt Securities Subscribed Abroad and External Financial Indebtedness
 
Debt securities with public registration abroad, other financial indebtedness abroad, and debt securities with public registration in Argentina that are denominated in foreign currency and fully subscribed abroad (collectively, “External Financial Indebtedness”) must be brought into and settled in the Foreign Exchange Market as a prerequisite for subsequent access to it for the purpose of servicing capital and interest payments. Consequently, although the settlement of proceeds from such transactions is not mandatory, failing to settle them will prevent future access to the Foreign Exchange Market for reimbursement purposes.

This requirement to bring in and settle funds will be considered fulfilled in the following cases, among others:
 
 
(i)
Indebtedness that does not generate disbursements due to being refinancing arrangements, provided that the refinancing does not anticipate the maturity of the original debt.
 
(ii)
For the amount of issuance expenses debited abroad.
 
(iii)
For the difference between the effective value and the nominal value in issuances of publicly registered debt securities placed below par.
 
(iv)
For the portion corresponding to an interest capitalization as stipulated in the debt agreement.
 

 		(v)
For the portion subscribed with foreign currency within Argentina in issuances of publicly registered debt securities abroad carried out from February 5, 2021, provided all conditions detailed in the Foreign Exchange Regime are met.
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(vi)
External Financial Indebtedness falling under Sections 7.11.1.3. and 7.11.1.5. of the Foreign Exchange Regime, provided that customs entry registration of goods is demonstrated for an amount equivalent to the financing received. The value of freight stated in the transport documentation related to the customs entry registration may also be considered, provided that the funds from these transactions were used for direct payment to the freight service provider for imports not included in the agreed purchase condition.
 
(vii)
For the portion of new debt securities delivered by a resident to its creditors as a participation premium, repurchase, early redemption, or similar, in the context of an exchange, repurchase, and/or early redemption of External Financial Indebtedness, provided that: (a) The nominal value of the new securities delivered as a participation premium, repurchase, or early redemption, or similar, does not exceed 5% (five percent) of the capital value of the debt effectively exchanged or repurchased; and (b) The new debt securities include at least a one-year grace period for capital repayment and involve a minimum two-year extension of the average life of the remaining exchanged or repurchased capital.
 
Subject to compliance with the established regulations, access to the Foreign Exchange Market will be granted for the early payment of capital and interest up to three business days before the due date for the capital or interest service payment.
 
In the case of a capital payment on debt securities issued from November 8, 2024, which is executed via transfer abroad, access to the Foreign Exchange Market must take place at least 365 (three hundred sixty-five) consecutive days from its issuance date.
 
Access to the Foreign Exchange Market for such payments more than three (3) days before the due date is generally subject to prior approval from the BCRA. The following cases of prepayment may be exempt from this prior BCRA approval:
 
 
(i)
Prepayment of capital and interest with the settlement of funds brought in from abroad through the issuance of a new debt security qualifying as External Financial Indebtedness.
 
(ii)
Prepayment of capital and interest with the simultaneous settlement of other External Financial Indebtedness.
 
(iii)
Prepayment of interest in the context of an exchange of debt securities qualifying as External Financial Indebtedness.
 (iv)
Simultaneous prepayment of capital and interest with the settlement of a new External Financial Indebtedness granted by a local financial entity based on a credit line from abroad.
 
(v)
Prepayment of capital and interest by a VPU adhered to the RIGI.
 
Additionally, prior approval from the BCRA is required for local residents to access the Foreign Exchange Market for capital and interest payments under External Financial Indebtedness with related parties. Certain specific exceptions apply, primarily requiring that the debt have an average life of no less than two (2) years and that the funds have been brought in and settled in the Foreign Exchange Market since October 2, 2020.
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Debts Between Residents
 
Access to the Foreign Exchange Market for the settlement of debts and other financial obligations in foreign currency, contracted from September 1, 2019, is generally prohibited, except in specific cases (such as payments related to credit cards).
 
Profits and Dividends
 
To remit foreign currency abroad as profits and/or dividends to non-resident shareholders, prior approval from the Central Bank is mandatory, unless the following requirements are met:
 
 
(i)
Profits and dividends must correspond to closed and audited financial statements.
 
(ii)
The total amount paid to non-resident shareholders must not exceed the amount in Argentine pesos corresponding to them based on the distribution determined by the shareholders’ meeting.
 
(iii)
If applicable, compliance with the Survey of External Assets and Liabilities for the relevant transactions must be met.
 
(iv)
The company falls under one of the following situations and meets all stipulated conditions in each case:
 
(a)
It registers direct investment contributions settled from January 17, 2020, where a partial dividend payment scheme is foreseen with a minimum payment period concerning the cutoff payment date.
 
(b)
Profits are generated from projects under the GasAr Plan.
 
(c)
It holds a “Certification of Increase in Goods Exports” for the years 2021 to 2023 issued under Section 3.18 of the Foreign Exchange Regime, equivalent to the value of profits and dividends paid.
(d)
The client performs a swap and/or arbitration operation with funds deposited in a local account and originating from foreign currency receipts of capital or interest from BOPREAL.
(e)
The client is a VPU adhered to the RIGI, and the profits correspond to direct foreign investment contributions that fall under Section 14.2.2 of the Foreign Exchange Regime. In this case, the client must provide documentation proving the definitive capitalization of the contribution.
 
According to Communication ‘A’ 8226, financial institutions are authorized to grant their clients access to the Foreign Exchange Market for the remittance of funds abroad in the form of profits and dividends to non-resident shareholders, pursuant to the applicable Foreign Exchange Regime, provided that such distributions correspond to distributable profits derived from realized earnings recorded in duly audited and regular annual financial statements for fiscal years beginning on or after January 1, 2025.
 
Non-Residents
 
Non-residents must obtain prior approval from the Central Bank to access the Foreign Exchange Market and acquire foreign currency, with only a few permitted exceptions.
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General Requirements
 
As a general rule, and in addition to the specific rules for each operation, certain general requirements must be met by a company or local individual to access the Foreign Exchange Market for purchasing foreign currency or transferring it abroad (i.e., payments for imports and other purchases of goods abroad; payment for services provided by non-residents; distribution of profits and dividends; payment for debt securities subscribed abroad and external financial indebtedness; payment of interest on debts for the importation of goods and services, among others) without requiring prior approval from the BCRA. Accordingly, the company or local individual must submit an affidavit stating:
 
 
(a)
That they did not hold Argentine deposit certificates representing foreign shares (“CEDEARs”) and/or available external liquid assets at the beginning of the day they request access to the Foreign Exchange Market for an amount exceeding the equivalent of US$100,000, and that all their foreign currency holdings in the country are deposited in financial institution accounts at the time of accessing the Foreign Exchange Market.
 
If the client had available external liquid assets and/or CEDEARs exceeding the amount established in the previous paragraph, the entity may also accept an affidavit from the client stating that the amount does not exceed the limit, considering that, partially or entirely, the external liquid assets were applied to specific exceptions provided for in the regulations, including:
 
 
(i)
Funds deposited in foreign bank accounts in their name originating from External Financial Indebtedness, whose amount does not exceed the equivalent of capital and interest payments due in the next 365 (three hundred sixty-five) consecutive days.
 
(ii)
Funds deposited in foreign bank accounts in their name originating in the last 180 (one hundred eighty) consecutive days from disbursements abroad received from November 29, 2024, onward, from External Financial Indebtedness.
 
(iii)
Funds deposited in foreign bank accounts in their name originating from the sale of securities settled in foreign currency as outlined in Section 3.16.3.6.iii) of the Foreign Exchange Regime.
 
(iv)
Funds deposited in foreign bank accounts in their name originating from debt securities issuances carried out in the last 120 (one hundred twenty) consecutive days, eligible for classification under Sections 7.11.1.5. and 7.11.1.6 of the Foreign Exchange Regime.
 
Entities may also accept an affidavit from the client stating that their holdings exceeding the established limit correspond to funds deposited in foreign bank accounts originating from the subscription abroad of a new debt security in the last 60 consecutive days, which will be used to execute a refinancing, repurchase, and/or early redemption of debt securities or financial debts abroad, qualifying as External Financial Indebtedness.
 

 		(b)
The client commits to settling in the Foreign Exchange Market, within five business days of availability, any funds received abroad originating from the collection of loans granted to third parties, the collection of a time deposit, or the sale of any type of asset, when the asset was acquired, the deposit was made, or the loan was granted after May 28, 2020.
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(c)
The client certifies that on the date of access to the Foreign Exchange Market and in the 90 (ninety) consecutive days prior, directly or indirectly or on behalf of third parties:(i) They have not made sales in the country of securities settled in foreign currency; (ii) They have not conducted swaps of securities issued by residents for external assets; (iii) They have not transferred securities to custodial entities abroad; (iv) They have not acquired securities issued by non-residents settled in pesos;(v) They have not acquired CEDEARs representing foreign shares; (vi) They have not acquired debt securities issued by private entities in foreign jurisdictions; (vii) They have not transferred local currency or other local assets (except for foreign currency funds deposited in local financial institutions) to any natural or legal person, resident or non-resident, related or unrelated, receiving as consideration, before or after, directly or indirectly, by themselves or through a related, controlled, or controlling entity, external assets, crypto assets, or securities deposited abroad.
 
Pursuant to Communication ‘A’ 8226 issued by the BCRA on April 11, 2025, foreign exchange outflows conducted through the Foreign Exchange Market by resident individuals shall not be subject to the requirement set forth in this section (c), and in the case of legal entities, transactions carried out up to such date shall not be considered for the purposes of the sworn statement required under this section.
 
 
(d)
The client commits not to carry out any of the transactions described in subsection (c) above from the moment they request access to the Foreign Exchange Market and for the subsequent 90 (ninety) consecutive days, directly or indirectly or on behalf of third parties.
 
Pursuant to Communication ‘A’ 8226, foreign exchange outflows conducted through the Foreign Exchange Market by resident individuals are not subject to the requirement set forth in this section (d).
 
Section 3.16.3.6. of the Foreign Exchange Regime outlines various transactions that should not be considered in affidavits submitted to comply with subsections (c) and (d).
 
 
(e)
Section 3.16.3 of the Foreign Exchange Regime states that if the client requesting access to the Foreign Exchange Market is a legal entity, in order for the transaction not to be subject to the prior approval requirement of the BCRA, the client must submit an affidavit to the corresponding financial institution stating:
 
(i)
A detailed list of the individuals or legal entities that exercise direct control over the client and other legal entities within the same economic group. To determine the existence of a direct control relationship, the types of relationships described in Section 1.2.2.1 of the BCRA regulations on “Large Credit Risk Exposures” must be considered. Companies sharing a control relationship as defined in Sections 1.2.1.1 and 1.2.2.1 of the “Large Credit Risk Exposures” regulations must be considered members of the same “economic group.”
 

 		(ii)
That on the date of requesting access to the Foreign Exchange Market and in the preceding 90 (ninety) calendar days, the client has not transferred local currency funds or other liquid local assets—except for foreign currency funds deposited in local financial institutions—to any individual or legal entity exercising direct control over the client, or to other companies within the same economic group, except for those directly related to routine transactions between residents for the acquisition of goods and/or services. Pursuant to Communication ‘A’ 8226, transactions carried out up to April 11, 2025, shall not be considered for the purposes of the sworn statement referred to herein.
 
(iii)
The requirements in (i) and (ii) above will be considered met if the client requesting access has submitted:
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 1.
An affidavit stating that within the period specified in Section (e)(ii), except for those directly related to routine transactions in the course of its business activities, it has not transferred local currency funds or other liquid local assets—except for foreign currency funds deposited in local financial institutions—to any individual or legal entity.
 

 		2.
An affidavit signed by each individual or legal entity listed in Section (e)(i) to whom the client has transferred funds under the terms of Section (e)(ii), confirming compliance with the requirements set out in Sections (c), (d), and (e)(ii).
 

 		3.
An affidavit signed by each individual or legal entity listed in Section (e)(i), confirming that: (x) they comply with the requirements in Sections (c) and (d), or (y) within the period specified in Section (e)(ii), except for those directly related to routine transactions between residents for the acquisition of goods and/or services, they have not received local currency funds or other liquid local assets—except for foreign currency funds deposited in local financial institutions—that originated from the client or from any entity listed in Section (e)(i) to whom the client transferred funds under the terms of Section (e)(ii).
 
Transfers of securities to foreign depositary institutions made or to be made for the purpose of participating in a repurchase operation of debt securities issued by an Argentine resident shall not be considered in the affidavits submitted for compliance with Sections (c) and (d) above.
 
For the preparation of affidavits required under Sections (c) and (d) above, sales settled in foreign currency in the country or abroad of BOPREAL securities, or transfers of these bonds to foreign depositaries, shall not be considered when they are carried out up to the amount acquired in the primary subscription. This also does not apply in cases of sales of securities settled in foreign currency abroad or transfers of securities to foreign depositaries, both executed from April 1, 2024, when the market value of these transactions does not exceed the difference between the value obtained from the sale of BOPREAL securities settled in foreign currency abroad and their nominal value, if the former is lower.
 
As a general rule, prior approval from the BCRA is required if the client is a natural or legal person included in the list of invoices or equivalent documents classified as fraudulent by the Tax Collection and Customs Control Agency (“ARCA”). The list of individuals or legal entities included in this register by ARCA is available at: https://servicioscf.afip.gob.ar/Facturacion/facturasApocrifas/default.aspx. This requirement does not apply to accessing the market for the cancellation of foreign currency financing granted by local financial institutions, including payments for foreign currency purchases made using credit or debit cards.

Under the Foreign Exchange Regime, when preparing affidavits required under Sections 3.16.3.1 and 3.16.3.2, among others, sales of securities settled in foreign currency in the country or abroad should not be considered if all funds obtained from such settlements have been or will be used within 10 consecutive days for, among others, the following transactions:
 
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(i)
Payments of principal or interest on new External Financial Indebtedness disbursed from October 2, 2023, including at least a one-year grace period for principal repayment.
 
(ii) 
Payments of principal and interest on debt securities issued from October 2, 2023, with public registration in the country that do not qualify as External Financial Indebtedness, denominated and subscribed in foreign currency, with payments due in the country, and including a minimum grace period of two years for principal repayment.
 (iii)
Payments of principal or interest on External Financial Indebtedness that does not generate disbursements due to refinancing of principal and/or interest from transactions covered in (i) and (ii), provided the refinancing does not anticipate the maturity of the original debt.
 
(iv)
Payments of principal or interest on debt securities issued with public registration in the country that do not qualify as External Financial Indebtedness, denominated in foreign currency, and payable in the country, that do not generate disbursements due to being refinanced capital and/or interest transactions as covered in (ii) above, provided the refinancing does not anticipate the maturity of the original debt.
 
In all cases mentioned above, the client must submit an affidavit stating that the funds received from the transactions in (i) to (iii) were used for making domestic payments related to investments in Argentina.
 
Other Specific Provisions

Securities Transactions
 
The Foreign Exchange Regime establishes that securities transactions executed abroad cannot be settled in pesos in Argentina. Only transactions involving securities may be settled in pesos in Argentina if they are executed domestically.
 
Except in the case of securities purchase and sale transactions carried out by resident individuals with settlement in foreign currency, the settlement of such transactions is not permitted through payment in foreign currency banknotes or by deposit into custody accounts or third-party accounts, unless they are liquidated in foreign currency and involving third-party accounts within the framework of section 4.3.2.3 of the Foreign Exchange Regime.
 
The CNV regulations establish a minimum holding period of one business day from its accreditation in the Central Securities Depository Agent with respect to clients who do not qualify as resident individuals for, among others:
 
 
(a)
Sales of marketable securities settled in foreign currency, in any jurisdiction and under any applicable law, as long as the purchase of such securities was made with Argentine pesos.
 
(b)
Transfers of marketable securities acquired with local currency settlement to foreign depositary institutions, regardless of the applicable law governing their issuance.
 
(c)
Applying marketable securities from foreign depositary institutions to transactions settled in foreign currency, in any jurisdiction, and under any applicable law.
 
The above restrictions do not apply to transfers of securities to foreign depositary institutions if the client intends to participate in an exchange of debt securities issued by the Government, local governments, or private sector resident issuers. The client must provide the corresponding certification for the exchanged debt securities.

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Nonetheless, the acquisition of securities settled in pesos in Argentina with funds from abroad is not prohibited, provided the transaction is not documented abroad. Additionally, the transfer of securities from abroad to commissary accounts in Argentina for subsequent sale settled in pesos in the country is not restricted, provided the transaction is executed within Argentina.
 
According to the CNV regulations, trading agents, settlement and clearing agents, and negotiable securities brokerage agents must comply with specific requirements to process orders and record transactions in authorized markets, particularly concerning the transactions outlined in Sections 3.16.3.1 and 3.16.3.2 of the Foreign Exchange Regime. These requirements vary depending on the type of client and the nature of the transaction. For non-resident clients (non-intermediaries), they must verify that the transactions are for the client’s own portfolio and funded with their own resources, ensuring that the daily trading volume does not exceed Ps. 200,000,000.

Exceptions to the aforementioned trading restrictions apply to BOPREAL acquired in primary auctions and to the sale of negotiable securities settled in foreign currency and under local jurisdiction, previously acquired in pesos by individual or corporate resident clients with funds from UVA mortgage loans granted by financial institutions authorized to operate under Law No. 21,526, up to the amount of the relevant loans and provided that the proceeds from these sales are applied to the purchase of real estate in Argentina under the framework of such loans
 
RIGI
 
BCRA Communication “A” 8099 has regulated the foreign exchange benefits for VPUs that adhere to the RIGI. The BCRA has established: (i) exceptions to the obligation to bring in and settle foreign currency from exports carried out by a VPU adhered to the RIGI; (ii) exceptions to the obligation to bring in and settle foreign currency from service exports; (iii) access to the Foreign Exchange Market to make payments for certain expenses; (iv) access to the Foreign Exchange Market to make dividend payments to non-resident shareholders; (v) application abroad of income derived from goods exports; and (vi) foreign exchange stability applicable to the VPU as of the date of adherence to the RIGI.
 
BCRA Reporting Regimes. Survey of External Assets and Liabilities
 
In all cases, and subject to compliance with the remaining applicable requirements, access to the Foreign Exchange Market will be granted for the payment of financial or commercial debts and for the payment of profits or dividends, provided that such debts are reported through the Central Bank’s reporting system established by Communication “A” 6401 (and its complementary Communication “A” 6795), known as the Survey of External Assets and Liabilities.
 
Advance Notice of Foreign Exchange Transactions
 
Entities authorized to operate in foreign currency must provide the BCRA, at the end of each business day and with two business days’ notice, with information on outgoing transactions through the Foreign Exchange Market for daily amounts equal to or greater than the equivalent of US$100,000. Clients must notify financial institutions in advance so that they can comply with the requirements of this reporting system and, consequently, as long as they simultaneously meet other requirements established in foreign exchange regulations, they may process the foreign exchange transactions.

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Foreign Exchange Criminal Regime
 
The Foreign Exchange Regime establishes that transactions that do not comply with the foreign exchange regulations set forth in this regulatory framework will be subject to the Foreign Exchange Criminal Regime (Law No. 19,359 and its amendments).
 
For more information on the current foreign exchange control restrictions and regulations, investors should seek advice from their legal advisors and review the applicable regulations referenced in this document, as well as its amendments and complementary regulations, which are available on the following websites: www.infoleg.gob.ar or www.bcra.gob.ar, as applicable. None of the information contained on or linked to these websites is incorporated by reference into this 20-F.
 
Money Laundering
 
The term money laundering is commonly used to refer to operations that aim to enter funds from criminal activities into the institutional system and thus convert profits from illegal activities into assets of apparently lawful origin.
 
On April 13, 2000, the Argentine Congress passed the Anti-Money Laundering Law which classifies money laundering as a crime. Additionally, such law, which amended several sections of the ACC, has established sanctions for those incurring in such illicit activity and has created the Financial Intelligence Unit (Unidad de Inteligencia Financiera) (“UIF”), a unit of the Ministry of Economy created to prevent money laundering and financing of terrorist activities.
 
The ACC defines money laundering as the exchange, transfer, management, sale or any other use of money or other assets obtained through a crime, by a person who did not take part in such original crime, with the potential result that such original assets (or new assets resulting from such original assets) appear as if obtained through legitimate means, provided that the aggregate value of the assets involved exceed in the aggregate (through one or more related transactions) Ps. 300,000. As previously mentioned, the Anti-Money Laundering Law created the UIF, which is in charge of the analysis, supervision and conveyance of information in order to prevent (A) the laundering of assets obtained from: (i) crimes related to illegal traffic and commercialization of narcotics (Law No. 23,737); (ii) crimes related to arms trafficking (Law No. 22,415); (iii) crimes related to the activities of an illegal association as defined in Article 210 bis of the ACC; (iv) illegal acts committed by illegal associations (Article 210 of the ACC) organized to commit crimes with political or racial motivation; (v) crimes of fraud against the Public Administration (Article 174, Section 5 of the ACC); (vi) crime against the Public Administration under Chapters VI, VII, IX and IX bis of Title XI of Book Two of the ACC; (vii) crimes of child prostitution and child pornography under Articles 125, 125 bis, 127 bis and 128 of the ACC; (viii) crimes related to financing terrorism (Articles 41 quinquies and 306 of the ACC); (ix) crimes of extortion (Article 168 of the ACC); (x) tax crimes, related to social security and fiscal resources (pursuant to law 24,769), (xi) crimes related to human trafficking; and (B) crimes related to financing terrorism.
 
The Anti-Money Laundering Law assigns information and control duties to certain private sector entities, such as banks, agents, stock exchanges and insurance companies, according to the regulations of the UIF, and for financial entities, the Central Bank.
 
Financial entities must inform the UIF about any suspicious or unusual transaction, or transactions lacking economic or legal justification, or that are unnecessarily complex. In addition, guidelines and internal procedures were created to detect unusual or suspicious transactions, which must be implemented by financial institutions and other entities.
 
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Pursuant to the same criteria that underlies the aforementioned law, in 2012, the office of the Attorney General issued Resolution No. 914/12, which created the Prosecutor Office for Economic Crime and Money Laundering (Procuraduría de Criminalidad Económica y Lavado de Activos). This office has no competence to apply sanctions, its main role is to collaborate with Federal Prosecutors in the investigation of crimes and in receiving complaints in order to initiate preliminary investigations.
 
The UIF issued Resolution No. 229/2011, which was replaced by Resolution UIF No. 21/2018 and, subsequently amended by Resolutions No. 156/2018, No. 18/2019, No. 117/2019, No. 112/2021, No. 6/2022 and 50/2022 (“AML in the Capital Market Sector”). The AML in the Capital Market Sector establishes certain procedures that must be followed by the authorized agents of the CNV involved in the placement, intermediation and public offering of securities (“Obliged Subjects in the Capital Market Sector”) in order to prevent, detect and report (within the deadlines established) the acts, transactions or omissions that may arise from committing money laundering and terrorist financing crimes in the capital market sector. Additionally, the AML in the Capital Market Sector introduced general guidelines to identify different types of customers (including a distinction between frequent, casual and inactive customers), the requested information, the documentation to be kept and the procedure to detect and report all suspicious transactions within the established deadlines.
 
The main obligations pursuant to the AML in the Capital Market Sector are the following: (i) to prepare manuals providing the mechanisms and procedures for the prevention of money laundering and financing of terrorism; (ii) to appoint a compliance officer; (iii) to audit regularly; (iv) to provide training programs to the employees; (v) to enforce measures that would allow the Obliged Subjects in the Capital Market Sector to compile the transactions performed by the customers using a computerized method, as well as technological tools which would enable the analysis and supervision of different transactions to identify behaviors and detect potential suspicious operations; (vi) the implementation of technological tools that would result in effective control and prevention procedures against money laundering and financing of terrorism; and (vii) to record the analysis and risk management of the suspicious transactions that were detected and those that, for having been considered suspicious, have been reported.
 
The Central Bank and the CNV should also comply with provisions of the Anti-Money Laundering Law. In this respect, the CNV regulations provide that entities involved in the public offering of securities (other than issuers), including, among others, underwriters of any primary issuance of securities, must comply with the standards set forth by the UIF. In particular, they must comply with the obligation regarding customer identification and required information, record-keeping, precautions to be taken to report suspicious transactions, policies and procedures to prevent money laundering and terrorist financing. Whilst, the acquirers of notes will provide the information and documentation required regarding the origin and legality of the funds used for the subscription.

On the other hand, pursuant to Resolution No. 21/2018, as amended subsequently, the Obliged Subjects in the Capital Market Sector shall identify and evaluate the risks that they are exposed to and, as a result, to adopt administrative measures for mitigating them, in order to more effectively prevent money laundering. In accordance with this standard, the Obliged Subjects in the Capital Market Sector must have policies and procedures to know their client (KYC), which must be applied according to the risk rating resulting from the implemented risk model. Within this framework, individuals are enabled to implement reputable technological platforms, which allow long-distance procedures without the need to present documentation in person, without prejudice to the fulfillment of due diligence duties.

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In accordance with Annex I of the UIF Resolution No. 154/2018 (which established the supervision and inspection mechanism of the UIF), both the Central Bank and the CNV are considered “Specific Controllers.” Therefore, they must collaborate with the UIF in complying with the procedures for the prevention of money laundering and finance of terrorism implemented by the obligated subjects subject to its control. For these purposes, they are empowered to supervise, monitor and inspect such entities. The refusal to cooperate or obstruction of inspections by the obliged subjects may result in penalties by the UIF, CNV or the Central Bank. Both UIF Resolution No. 30/2017, as amended, as well as the Central Bank regulations require banks to take certain minimum precautions to prevent money laundering.
 
With respect to issuers (such as the Company), CNV regulations provide that any person (either individuals or legal entities) performing significant capital contributions or loans must be identified, whether a shareholder or not at the time of the contributions, and must meet the requirements for general participants in the public offering of securities, set forth in the CNV regulations and the UIF regulations, especially with respect to the identification of such persons and to the origin and legality of the funds and loans provided.
 
On October 14, 2016, the UIF issued Resolution No. 135/2016, which strengthened the regulations regarding the international exchange of information between similar authorities which may enter into agreements or memoranda of understanding as well as to the foreign public bodies that are members of the Egmont Group of Financial Information Unit or the Asset Recovery Network of the Financial Action Task Force of Latin American.
 
On January 11, 2017, the UIF published Resolution No. 4/2017, which established that special due diligence measures must be applied for identifying foreign and domestic investors (who shall comply with the requirements therein set forth to qualify as such) in the Republic of Argentina upon requesting the opening of special investment accounts.
 
In addition, the Argentine tax amnesty law (Law No. 27,260 and its regulatory Decree No. 895/16, as amended) (“Tax Amnesty Law”) provided that the information that has been voluntarily disclosed may be used for investigating and sanctioning crimes of money laundering and finance of terrorism. To this end, the UIF is authorized to inform other public intelligence agencies about investigations, based on a previous resolution of the president of the UIF and provide those agencies with information that evidences crimes of money laundering and/or financing of terrorism. In the same way, the AFIP is obliged to report to the UIF any suspicious transactions detected in the context of the Tax Amnesty Law and to provide all the information that the UIF requires, not being able to invoke fiscal confidentiality.
 
In November 2018, the UIF passed Resolution No. 134/2018, which updates the list of persons considered to be “politically exposed persons” (“PEP”) in Argentina, taking into account any positions occupied by them in the present or in the past, and their relationship by closeness or affinity with third parties who occupy or have occupied such positions. Also, during 2019, the UIF issued Resolution No. 15/2019, which modified the politically exposed persons list and Resolution 128/19 established that foreign politically exposed persons will be considered high risk and therefore subject to reinforced due diligence measures, with some exceptions.
 
On December 26, 2018, the UIF published UIF Resolution No. 154/2018, which amended the supervision procedures then in effect providing for new procedures consistent with and conforming to the international standards promoted by the Financial Action Task Force (“FATF”), which shall be applied in accordance with a risk-based approach.
 
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In July 2019, by Decree No. 489/2019, the Executive Branch created the Public Registry of Persons and Entities Linked to Acts of Terrorism and its Financing (Registro Público de Personas y Entidades Vinculadas a Actos de Terrorismo y su Financiamiento) (“RePET”), to centralize and manage all information related to the administrative freezing of assets linked to acts of terrorism and its financing. RePET is empowered to provide public access and guarantee the exchange of information with the agencies with competence in the field and with third countries, and the reporting parties must provide all information related to transactions carried out or attempted by individuals or legal entities included in RePET.

In turn, on November 14, 2019, by means of General Resolution No. 816, the CNV adapted the regulations related to the prevention of money laundering and financing of terrorism, in order to include the new obliged subjects contemplated in the Law on Prevention of Money Laundering and in the Regulations on Money Laundering in the Capital Market Scope. Among the new obligated subjects were included crowdfunding platforms, global investment advisory agents and human or legal persons acting in the placement of mutual funds or other collective investment products.

On November 17, 2019, through Resolution No. 117/2019, the UIF updated the minimum thresholds above which reporting entities must carry out the enhanced control and due diligence requirements established by the applicable anti-money laundering and anti-terrorist financing regulations. This measure aims to “contribute to an efficient prevention of money laundering and terrorist financing” from a risk-based approach, in accordance with international standards promoted by the FATF.

On October 21, 2021, the UIF issued Resolution 112/2021, whereby it establishes the measures and procedures that the regulated entities listed in Article 20 of the Money Laundering Prevention Law must observe to identify the beneficial owner of the customer in question. In this sense, such Resolution 112/2021 established that the beneficial owner shall be considered the human person who owns at least 10% of the capital or voting rights of a legal person, a trust, an investment fund, an affectation patrimony and/or any other legal structure; and/or the human person who by other means exercises the final control of the same.

On January 13, 2022, the UIF issued Resolution 6/2022. Pursuant to such resolution, the profile to be prepared by each obliged subject shall be based on the understanding of the purpose and expected nature of the commercial relationship, the transactional information and the documentation related to the economic, equity, financial and tax situation provided by the client or obtained by the obliged subject itself.

On April 11, 2022, pursuant to Resolution 50/2022, the UIF updated the thresholds for obliged subjects to perform due diligence measures on their clients and systematic transaction reports.

On February 2, 2023, the reform of UIF Resolution No. 14/2023 applicable to financial and exchange entities was published in the Official Gazette. The reform specifies the main guidelines for AML and Countering the Financing of Terrorism (CFT) risk management and the minimum compliance that each financial entity must adopt and apply to manage the risk of being used by third parties for the commission of these crimes. This is done through a Risk-Based Approach (RBA), considering the results of National Risk Assessments for AML/CFT and CFT/FP approved in 2022. In this way, and in accordance with Recommendation 1 of the FATF, it aims to ensure that competent authorities, financial institutions, and Designated Non-Financial Businesses and Professions (DNFBPs) can ensure that measures to prevent or mitigate AML/CFT risks correspond to the identified risks, enabling more effective decision-making regarding the allocation of resources.

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Additionally, based on international recommendations, the reform establishes the prohibition of maintaining anonymous or under fictitious names, specifies required measures concerning foreign politically exposed persons, emphasizes the need to apply proportionate Enhanced Due Diligence measures to identified risks, and incorporates the possibility for financial institutions to rely on third parties for the execution of certain due diligence measures.

On May 2, 2023, UIF issued Resolution No. 72/2023, which consolidates the collaboration duty of regulatory bodies (BCRA, CNV, Superintendencia de Seguros de la Nación, and Instituto Nacional de Asociativismo y Economía Social) in supervision procedures. This regulation facilitates coordination among the bodies and adopts a risk-based approach for obligated entities. Additionally, the “Working Group Regulations” and the “Model of Final Technical Report” are approved as references for the preparation of reports by the regulatory bodies.

On May 9, 2023, Resolution No. 78/2023 was published in the Official Gazette, coming into effect on July 1, 2023. The purpose of this resolution is to establish minimum requirements for the identification, assessment, monitoring, management, and mitigation of AML/CFT risks. It is directed towards obligated entities included in Article 20, subsections 4, 5, and those of subsection 22 of the Anti-Money Laundering Prevention Law, particularly those entities acting as Financial Trustees. The resolution mandates the implementation of an Anti-Money Laundering/Countering the Financing of Terrorism (AML/CFT) Prevention System, adopting a risk-based approach. This system is required to encompass comprehensive policies, procedures, and controls aimed at effectively identifying, assessing, managing, and mitigating the AML/CFT risks to which the obligated entity is exposed. Furthermore, it delineates, among other aspects, specific risk factors that obligated entities must consider. It imposes the obligation to conduct technical self-assessment risk reports and emphasizes the need for duly justified and approved risk tolerance declarations by the management and highest authority. Additionally, the resolution underscores the establishment of suitable policies, procedures, and controls to mitigate risks.

Moreover, the resolution mandates that obligated entities adopt policies, procedures, and minimum compliance controls to ensure adherence to regulations and detect irregularities. It establishes essential requirements that prevention manuals should incorporate, alongside other control measures such as appointing compliance officers and a Prevention Committee, implementing training plans, conducting Prevention System evaluations, and formulating a Code of Conduct, among other measures. Finally, the resolution compels the implementation of measures for customer identification, verification, and knowledge, as well as for monitoring, analysis, and reporting.

On June 16, 2023, Resolution No. 99/2023 was published, outlining the obligations that Obligated Entities of Cooperatives and Mutuals must fulfill to manage AML/CFT risks in accordance with prevailing international standards, best practices, guidelines, and recommendations from the FATF. The primary objective of the reform is to adopt a risk-based approach for more effective prevention, introducing key definitions such as risk self-assessment, the effectiveness of the preventive system, and advisory alerts. Additionally, systematic compliance reports are established, allowing differentiated reporting periods for certain Obligated Entities. The resolution will become effective on August 1, 2023, replacing UIF Resolution No. 11/2012.

Furthermore, on June 14, 2023, Resolution No. 126/2023 was published, rendering Resolution No. 28/2018 null and void as of September 1 of the same year. It amends the minimum requirements for the identification, assessment, monitoring, management, and mitigation of AML/CFT risks that obligated entities, as outlined in Article 20, subsections 8 and 16 of the Anti-Money Laundering Prevention Law, must adopt and apply in accordance with their policies, procedures, and controls to prevent the risk of being used by third parties for criminal AML/CFT purposes.

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Subsequently, on September 1, 2023, Resolution 169/2023, as adjusted by Resolution 177/2023, established new minimum requirements for the identification, assessment, monitoring, management, and mitigation of AML/CFT risks that capitalization, savings, savings and loan, economic, capital formation, or other similar or equivalent societies, requiring money or securities from the public under any form with the promise of awarding or delivering goods, providing services, or future benefits, as outlined in Article 9 of Law No. 22,315, must adopt and apply according to their policies, procedures, and controls to prevent the risk of being used by third parties for criminal AML/CFT purposes. On September 18, 2023, through UIF Resolution 177/2023, certain articles of Resolution UIF No. 169/23 were rectified, including the consecutive order of subsections in Article 12 and normative references included in Articles 26, 28, 29, 30, and 40.

On March 15, 2024, Law No. 27.739 was published in the Official Gazette, and introduced certain modifications to the regulatory framework for AML/CFT. Among these, the creation of a Centralized Public Registry of Ultimate Beneficial Owners, managed by the AFIP, stands out. All companies, legal entities, or other contractual entities or legal structures established in Argentina or of foreign origin that carry out activities in the country and/or own goods and/or assets located and/or placed in the country must be registered.
 
E. Taxation
 
General
 
The following general summary of the main tax consequences in Argentina and the United States relating to the, ownership and disposition of securities issued by us is based on the tax laws of Argentina, the United States and regulations thereunder (as applicable) as in effect on the date hereof, each subject to any changes that may come into effect after such date under the Argentine and United States laws and regulations (as applicable) as may become effective subsequently to such date, possibly with retroactive effect.
 
Even though this summary is considered to constitute an appropriate interpretation of the effective Argentine tax laws and United States federal income tax laws as of the date hereof, no assurance may be given that the courts or tax authorities in charge of application of such laws will agree to this interpretation. Furthermore, it should be noted that there have been many changes in Argentine tax laws and United States tax laws in the past and in particular in recent years, and that such laws may be subject to restatements, revocation of exemptions, reestablishment of taxes and other changes.
 
Prospective investors should consult their own tax advisors as to the Argentine tax consequences and United States federal income tax consequences of the purchase, ownership and disposition of our securities, including, the effect of any foreign, state or local tax laws.
 
Argentine Taxes
 
Income Tax
 
Law No. 27,430, enacted on December 27, 2017, and published in the Official Gazette on December 29, 2017, had introduced several amendments to Income Tax Law No. 20,628, among others, a corporate tax rate reduction in two phases. For fiscal years beginning on or after January 1, 2018, until December 31, 2019, there had been a reduction of the tax rate from 35% to 30%. Beginning on or after January 1, 2020, the tax rate would have been further reduced to 25%. Additionally, a withholding of 7% or 13% had been established for the fiscal years mentioned above, on the dividends distributed by local entities in favor of their shareholders provided they are resident individuals or undivided estates, or are foreign beneficiaries.

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On June 16, 2021, Law 27,630 was enacted and published in the Official Gazette. This law increases corporate income tax rates for tax years beginning January 1, 2021, and onwards. The new law increases tax rates by replacing the fixed tax rate with a progressive tax scale. It also extends the 7% withholding tax rate currently in force to dividends from profits accrued in tax years beginning January 1, 2021, and thereafter.
 
Taxation on Dividends
 
In view of the last amendments introduced to the Income Tax Law by virtue of the Tax Reform, as of fiscal years beginning on January 1, 2018, the taxation applicable to dividends distributed from Argentine companies would be as follows, as amended by the Solidarity Law:
 
Dividends originated from profits obtained during fiscal years 2019, 2020 and 2021: dividends on Argentine shares paid to Argentine individuals and/or non-residents (“Foreign Beneficiaries”) are subject to a 7% income tax withholding on the amount of such dividends (“Dividend Tax”).
 
Dividends originated from profits obtained during fiscal year 2021 onward: the tax rate is raised to 7%.
 
For Argentine individuals not registered before the AFIP as payers of income tax and foreign beneficiaries, the Dividend Tax withholding will be considered as a unique and final payment. In addition, under the Tax Reform, rules are created that regulate and limit the possibility to offset gains derived from the distribution of dividends with losses generated in other operations.
 
If dividends are distributed to Argentine Entities as defined below, no Dividend Tax should apply.
 
However, Law No. 27,451, published in the Official Gazette on December 23, 2019, suspended, until fiscal years starting on January 1st, 2021, the application of the withholding tax at a 13% rate on payment of dividends and profit distribution, and reestablished the 7% rate for this withholding tax.
 
Capital Gains Tax
 
Resident individuals
 
Capital gains obtained by resident individuals or undivided estates situated in Argentina from the sale or disposition of common shares and other securities are subject to income tax at a 15% rate on net income, unless such securities were traded in stock exchange under the supervision of the CNV, in which case an exemption applies.
 
Losses arising from the sale, exchange or other disposition of common shares or ADSs can be applied only to offset such capital gains arising from the sale, exchange or other disposition of these securities, for a five‑year carryover period.
 
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Foreign beneficiaries
 
Capital gains of Argentine source (as it is the case of both our ADSs and shares) obtained by non-Argentine individuals or non-Argentine entities from the sale, exchange or other disposition of shares are subject to income tax at a 15% rate on the net capital gain or at a 13.5% rate on the gross price at the seller’s election. Notwithstanding, Law No. 27,430 established an exemption for foreign beneficiaries participating in the sale of publicly traded shares traded in stock exchanges under the supervision of the CNV. Said Law also established an exemption for capital gains derived from the sale, exchange or other disposition of share certificates issued abroad that represent shares issued by Argentine companies (i.e., ADRs). The exemptions will apply only if the foreign beneficiaries do not reside in, and the funds do not arise from, “non-cooperating” jurisdictions for tax transparency purposes.
 
In case the foreign beneficiaries reside in or the funds arise from “non-cooperating jurisdictions,” the tax rate applicable for the sale, exchange or other disposition of shares and/or ADSs amounts to 35%. The non-cooperating jurisdictions list is prepared and published by the executive branch. The ARCA (ex AFIP) has prepared an indicative and non-exhaustive list of jurisdictions considered to be low-or-no-tax jurisdictions, which can be consulted on their web site at: https://www.afip.gob.ar/fiscalidad-internacional/jurisdicciones-no-cooperantes/jurisdicciones-baja-nula-tributacion/que-son.asp. The U.S. is currently not a non-cooperating jurisdiction.
 
The Tax Reform, effective as of January 1, 2018, specifies that in case of share certificates issued abroad that represent shares issued by Argentine companies (i.e., ADSs), the “source” is defined by the location of the original issuer of the shares. However, the tax will not be due if the publicly traded exemption, described above, applies in respect of the underlying shares
 
Argentine entities
 
Capital gains obtained in tax years beginning from January 1, 2026, by Argentine entities (in general entities organized or incorporated under Argentine law, certain traders and intermediaries, local branches of non-Argentine entities, sole proprietorships and individuals carrying on certain commercial activities in Argentina) derived from the sale, exchange or other disposition of shares or ADSs are subject to the following tiered structure of corporate income tax rates for different brackets of earnings:
 
Annual taxable income
(in pesos)
 
Tax due on lower
limit
(in pesos)
 
Marginal rate on the excess of the
lower limit
0 to 133.51 million
 
0
 
25%
Over 133.51 million to 1335.14 million
 
33.38 million
 
30%
Over 1335.14 million
 
393.87 million
 
35%
 
Losses arising from the sale, exchange or other disposition of shares or ADSs can be applied only to offset such capital gains arising from the sale, exchange or other disposition of these securities, for a five-year carryover period.
 
WE RECOMMEND PROSPECTIVE INVESTORS TO CONSULT THEIR OWN TAX ADVISOR REGARDING THE PARTICULAR TAX CONSEQUENCES CONCERNING THE SALE OR OTHER DISPOSITIONS OF SHARES AND ADSs.

Value Added Tax (“VAT”)
 
The sale, exchange or other disposition of our ADSs or common shares and the distribution of dividends are exempted from VAT.
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Personal Assets Tax
 
Argentine entities, like us, are subject to the personal assets tax corresponding to Argentine individuals and Foreign Beneficiaries (be they legal entities or individuals) for the holding of company shares at December 31 of each year.
 
Pursuant to Law No. 27,541, as of December 31, 2019, the rate is 0.50% and is levied on the proportional net worth value (valor patrimonial proporcional), of the shares as per the Argentine entity’s last financial statements prepared under Argentine GAAP.
 
Pursuant to the Personal Assets Tax Law, the Argentine company is entitled to seek reimbursement of such paid tax from the applicable Argentine domiciled individuals and/or foreign domiciled shareholders.
 
Tax on Credits and Debits on Bank Accounts
 
Law No. 25,413, as amended and regulated by Law No. 25,453, established a tax, with certain exceptions, levied on debits and credits of any nature on bank accounts held at Argentine financial institutions, except for those specifically exempted pursuant to legal provisions and regulations thereof. The general tax rate is 0.6% for each debit and credit (although in certain cases an increased rate of 1.2% and a reduced rate of 0.075% may apply).
 
Certain transfers of money or cash movements through other mechanisms may also trigger application of this tax. In general, the financial institutions involved act as tax collection and tax calculation agents.
 
Decree No. 409/2018 established that as of January 1st, 2018, 33% of the tax paid on credits and debits levied at the 0.6% general tax rate and 1.2% tax rate, and 20% of the tax paid on transactions levied at the lesser tax rate, will be considered as a payment on account of income tax, taxes on presumed minimum income or the special contribution on cooperatives capital by the bank account holders. The exceeding amount will not be subject to compensation with other taxes or transfer in favor of third parties; however, it can be carried forward to other fiscal periods of the above-mentioned taxes.
 
This tax has certain exemptions; as an example, debits and credits in banking accounts opened by foreign legal entities in accordance with BCRA Communication “A” 3250 and used exclusively for the purpose of making financial investments in Argentina are exempted from this tax is accordance with section 10, paragraph s) of Decree No. 380/2001. Likewise, Law No.27,264 established that the Tax on Credits and Debits on Bank Accounts that had actually been deposited may be computed in a 100% as payment on account of the income tax by companies that are considered “micro” and “small” and in 50% by manufacturing industries considered “medium -trench 1-” under the terms of article 1 of Law No. 25,300 and its complementary regulations. In case securities’ holders receive payments in local bank checking accounts, such tax may apply.

Turnover Tax
 
The turnover tax is a local tax; therefore, the rules of the relevant provincial jurisdiction should be considered, which may levy this tax on the customary purchase and sale, exchange or other disposition of common shares and ADSs, and/or the collection of dividends at an average rate between 5% and 10%, unless an exemption is applicable. In the particular case of the City of Buenos Aires, any transaction involving common shares and/or the collection of dividends and revaluations is exempt from this tax. To date, there is no withholding regime provided for foreign holders of common shares and ADSs.

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Stamp Tax
 
The stamp tax is a local tax that is generally levied on the consummation of onerous transactions executed within a certain provincial jurisdiction or outside a certain provincial jurisdiction but with effects in such jurisdiction.

Notwithstanding the fact that the stamp tax is a local tax, for Buenos Aires City, the acts, contracts and transactions, including money delivery or receipt transactions, related to the issuance, subscription, placement and transfer of notes, issued pursuant to the Negotiable Obligations Law regime are exempted from application of this tax. This exemption shall include the creation of any real or personal guarantees in favor of investors or third-parties guaranteeing the issuance, either prior to, simultaneous with or subsequently to such issuance.

This exemption also covers security rights related to issuances. However, this exemption is forfeited if, within a 90-calendar days term, the relevant authorization is not requested for the public offering of such securities before the CNV.

The acts and/or instruments related to the trading of shares and other securities duly authorized for public offering by the CNV are exempted from application of stamp tax in the City of Buenos Aires. This exemption is also ineffective if the circumstances mentioned in the last sentence of the previous paragraph occur.

In turn, in the Province of Buenos Aires, any acts, contracts, transactions, including money delivery or receipt transactions, related to the issuance, subscription, placement and transfer of notes issued pursuant to the Negotiable Obligations Law regime and Law No. 23,962 are exempted from application of this tax. This exemption shall include the creation of any real or personal guarantees in favor of investors or third-parties guaranteeing the issuance, either prior to, simultaneous with or subsequently to such issuance.

Considering the autonomous authority vested in each provincial jurisdiction in connection with tax matters, any potential effects derived from these transactions must be analyzed, in addition to the tax treatment established by the other provincial jurisdictions. Potential investors must consider the stamp tax impact depending on the local jurisdictions involved.

Transfer Taxes
 
The sale, exchange or other disposition of our common shares or ADSs is not subject to transfer taxes
 
Court Taxes
 
In the event that it becomes necessary to institute legal actions in relation to our securities before a federal court in Argentina or the courts sitting in the City of Buenos Aires, a court tax will be imposed on the amount of any claim (currently at a rate of 3.0%). Certain court and other taxes could be imposed on the amount of any claim brought before the courts of the relevant province.

 Treaties to Avoid Double Taxation
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Argentina has signed tax treaties for the avoidance of double taxation with Australia, Belgium, Bolivia, Brazil, Canada, Chile, Denmark, Finland, France (which amendment protocol is pending ratification), Germany, Italy, Mexico, Norway, Qatar, Russia, Spain, Sweden, Switzerland, Turkey, the Netherlands, the People’s Republic of China, United Arab Emirates, United Kingdom, and Uruguay (through an information exchange treaty that contains clauses for avoidance of double taxation). In addition, Argentina has signed tax treaties with Austria, Japan and Luxembourg, but they are still pending approval by the Argentine Congress. In turn, tax treaties are being negotiated with Colombia and Israel, and amendments to the current tax treaty with Germany. There are currently agreements between Argentina and the United States on the exchange of Country-by-Country Reports, and automatic exchange of financial account information to facilitate implementation of the U.S. Foreign Account Tax Compliance Act (FATCA), but there is no tax treaty or convention in force between both countries. It is not clear when, if ever, a treaty will be ratified or entered into effect. As a result, the Argentine tax consequences described in this section will apply, without modification, to a holder of our common shares or ADSs that is a U.S. resident. Foreign shareholders located in certain jurisdictions with a tax treaty in force with Argentina may be exempted from the payment of the personal asset tax.

Inflow of Funds from Non‑Cooperative Jurisdictions
 
Non-cooperative jurisdictions are those countries or jurisdictions that do not have in force with the Government an agreement for the exchange of information on tax matters or a treaty to avoid international double taxation with a broad clause for the exchange of information. Likewise, those countries that, having an agreement of this type in force, do not effectively comply with the exchange of information will be considered non-cooperative. The aforementioned treaties and agreements must comply with international standards of transparency and exchange of information on fiscal matters to which the Argentine Republic has committed itself. After the tax reform the white list system in force was replaced by a black list system. In this system, the Executive Branch would have to prepare and update a list of the countries considered as non-cooperative based on the aforementioned criteria. As of today, the United States is considered a cooperating country.

According to the legal assumption established by Law No. 11,683 Section 18.1 as amended, incoming funds from non-cooperative jurisdictions are considered unjustified net worth increases for the local receiver.
 
Unjustified net worth increases are subject to the following taxes:
 

 		•
Income tax would be assessed on 110% of the amount of funds transferred;
 

 		•
VAT would be assessed on 110% of the amount of funds transferred. Even though the concept “income arising from” is not clear, it could be construed as any fund transfer;
 

 		•
from an account in a non-cooperative jurisdiction, or from a bank account opened outside of a non-cooperative jurisdiction but owned by an entity located in a non-cooperative jurisdiction; or
 

 		•
to a bank account located in Argentina or to a bank account opened outside of Argentina but owned by an Argentina tax resident.
 
Notwithstanding the above, the Law provides that the Federal Administration of Public Revenues can accept those funds that derived from activities genuinely performed by an Argentine taxpayer, or by a third party in said jurisdiction.
 
In relation with the application of the above mentioned legal presumption on incoming funds from jurisdictions considered as low or null tax jurisdictions (defined under Section 20 of the Argentine Income Tax Law), pursuant to Section 25 of the Decree No. 48/2023, the total tax burden applicable in each jurisdiction on business income shall be taken into account, irrespective of the level(s) of government by which such taxes are imposed.
 
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In practice, this means that a jurisdiction in which the maximum level of taxation on business income is below 15% may be regarded as a low-tax or zero-tax jurisdiction.
 
THE ABOVE SUMMARY DOES NOT REPRESENT A FULL ANALYSIS OF ALL THE TAX CONSEQUENCES AND DOES NOT ADDRESS ALL OF THE ARGENTINE TAX CONSEQUENCES THAT MAY BE APPLICABLE DERIVED FROM THE OWNERSHIP OF NEGOTIABLE OBLIGATIONS. POTENTIAL HOLDERS AND BUYERS SHOULD CONSULT THEIR OWN TAX ADVISERS REGARDING THEIR PARTICULAR TAX CONSEQUENCES. IT DOES NOT PURPORT TO BE A COMPREHENSIVE DESCRIPTION OF ALL THE ARGENTINE TAX CONSIDERATIONS THAT MAY BE RELEVANT TO A DECISION TO PURCHASE, OWN OR DISPOSE OUR SHARES. IN PARTICULAR, THIS SUMMARY DOES NOT DESCRIBE ANY TAX CONSEQUENCES ARISING UNDER THE LAWS OF ANY STATE, LOCALITY, MUNICIPALITY OR TAXING JURISDICTION OTHER THAN CERTAIN FEDERAL LAWS OF ARGENTINA.
 
United States Taxes
 
General. This following discussion is a summary of U.S. federal income tax consequences generally applicable to a U.S. holder (as defined below) who holds our Class B Shares or ADSs. It applies to a U.S. holder only if such holder holds our Class B Shares or ADSs as “capital assets” within the meaning of the Internal Revenue Code of 1986, as amended (“Code”) and is not a member of a special class of holders subject to special rules, including: a dealer in securities; a trader in securities that elects to use a mark-to-market method of accounting for his or her securities holdings; a tax-exempt organization; a life insurance company; a person liable for alternative minimum tax; a person that actually or constructively owns 10% or more of the voting power or value of our aggregate shares outstanding; a person that holds Class B Shares or ADSs as part of a hedging or straddle or conversion transaction; a person that purchases or sells Class B Shares or ADSs as part of a wash sale for tax purposes; a partnership (or other entity or arrangement treated as a partnership for U.S. federal income tax purposes) and partners or members therein; or a person whose functional currency is not the U.S. dollar.
 
This discussion is based on the Code, its legislative history, existing and proposed regulations, published rulings and court decisions, and the laws of Argentina all as currently in effect. These laws are subject to change, possibly on a retroactive basis. In addition, this section is based in part upon the assumption that each obligation in the Deposit Agreement and any related agreement will be performed in accordance with its terms.
 
If a partnership (or other entity or arrangement treated as a partnership for U.S. federal income tax purposes) holds Class B Shares or ADSs, the U.S. federal income tax treatment of a partner will generally depend on the status of the partner and the tax treatment of the partnership. A partner in a partnership holding Class B Shares or ADSs should consult its tax advisor with regard to the U.S. federal income tax treatment of an investment in Class B Shares or ADSs.
 
A holder is a U.S. holder if such holder is a beneficial owner of Class B Shares or ADSs and such holder is: a citizen or resident of the United States; a domestic corporation or other entity taxable as such; an estate whose income is subject to U.S. federal income tax regardless of its source; or a trust, if a United States court can exercise primary supervision over the trust’s administration and one or more United States persons are authorized to control all substantial decisions of the trust (“U.S. holder”).
 
In general, and taking into account the earlier assumptions, for U.S. federal income tax purposes, a holder of ADRs evidencing ADSs will be treated as the owner of the underlying Class B Shares represented by those ADSs, and exchanges of Class B Shares for ADRs, and ADRs for Class B Shares, will not be subject to U.S. federal income tax.

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This discussion does not generally address any aspects of U.S. taxation other than federal income taxation. Holders of Class B Shares or ADSs are urged to consult their tax advisors regarding the U.S. federal, state and local tax consequences of owning and disposing of the Class B Shares or ADSs in their particular circumstances.
 
Taxation of Dividends. Under the United States federal income tax laws, and subject to the passive foreign investment company (“PFIC”) rules discussed below, a U.S. holder must include in his or her gross income the gross amount of any dividend that we pay out of our current or accumulated earnings and profits (as determined for U.S. federal income tax purposes). If the holder is a non-corporate U.S. holder, dividends that constitute qualified dividend income will be taxable at the preferential rates applicable to long-term capital gains; provided that the Class B Shares or ADSs are held for more than 60 days during the 121-day period beginning 60 days before the ex-dividend date and certain other holding period requirements are met. Provided that we are not a PFIC, for the year in which a dividend is paid or the preceding taxable year, dividends that are paid with respect to the ADSs that are readily tradable on an established securities market in the United States are qualified dividend income. Under this rule, we expect that the dividends we pay with respect to the ADSs will be qualified dividend income. Because the Class B Shares are not readily tradable on an established securities market in the United States, it is unclear whether dividends paid with respect to the Class B Shares will also be qualified dividend income.
 
The holder must include any Argentine tax withheld from the dividend payment in this gross amount even though the holder does not in fact receive it. The holder must include the gross amount of dividends in income when the holder, in the case of Class B Shares, or the depositary, in the case of ADSs, receives the dividend, actually or constructively. The dividend will not be eligible for the dividends-received deduction generally allowed to U.S. corporations in respect of dividends received from other U.S. corporations. Distributions in excess of current and accumulated earnings and profits, as determined for U.S. federal income tax purposes, will be treated as a non-taxable return of capital to the extent of a holder’s basis in the Class B Shares or ADSs and thereafter as capital gain.
 
The amount of the dividend distribution that a holder must include in his or her income will be the U.S. dollar value of the peso payments made, determined at the spot peso/U.S. dollar rate on the date such dividend distribution is includible in such holder’s income, regardless of whether the payment is in fact converted into U.S. dollars. Generally, any gain or loss resulting from currency exchange fluctuations during the period from the date a holder includes the dividend payment in income to the date such payment is converted into U.S. dollars will be treated as ordinary income or loss and will not be eligible for the special tax rate applicable to qualified dividend income. Such gain or loss will generally be income or loss from sources within the United States for foreign tax credit limitation purposes.
 
For foreign tax credit purposes, the dividend will generally be income from sources outside the United States. Dividends will, depending on the holder’s circumstances, generally be either “passive” or “general” income, for purposes of computing the foreign tax credit allowable to the holder. Subject to certain limitations, the Argentine tax withheld and paid over to Argentina will generally be creditable or deductible against your U.S. federal income tax liability. Special rules apply in determining the foreign tax credit limitation with respect to dividends that are subject to the preferential tax rates.
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However, it is likely that no U.S. foreign tax credit will be allowed to U.S. holders of Class B Shares or ADSs in respect of any personal property or similar tax imposed by Argentina (or any taxing authority thereof or therein) (for example, if such tax is not treated as an income tax for U.S. federal income tax purposes). The calculation of foreign tax credits and, in the case of a U.S. holder that elects to deduct foreign taxes, the availability of deductions, involve the application of complex rules that depend on a U.S. holder’s particular circumstances. All U.S. holders should consult their own tax advisors regarding the creditability or deductibility of such taxes.

Taxation of Capital Gains. Subject to the PFIC rules discussed below, a U.S. holder that sells or otherwise disposes of Class B Shares or ADSs will recognize gain or loss for U.S. federal income tax purposes in an amount equal to the difference between the U.S. dollar value of the amount realized and his or her tax basis (determined in U.S. dollars) in such Class B Shares or ADSs. Capital gain of a non-corporate U.S. holder is generally taxed at preferential rates where the holder has a holding period greater than one year. The gain or loss generally will be income or loss from sources within the U.S. for foreign tax credit limitation purposes.

As discussed in the previous paragraph, it is possible that a U.S. holder who sells or purchases the Class B Shares or ADSs may be subject to Argentine tax upon such sale or acquisition. If the seller is legally liable for the tax and the seller pays this tax, then the seller should be able to claim a foreign tax credit for U.S. federal income tax purposes in an amount equal to the amount of the tax, subject to generally applicable limitations. However, because the gain from a sale or other disposition of Class B Shares or ADSs will be U.S. source income, such seller would need a sufficient amount of other foreign source income that is untaxed, or that is taxed at a tax rate that is sufficiently lower than the U.S. tax rate applicable to such seller, in order to be able to claim this foreign tax credit. Additionally, if an Argentine tax is withheld on the sale or other disposition of Class B Shares or ADSs, then the seller must include the amount of such tax withheld in the amount realized upon the sale or disposition, even though the seller does not in fact receive it. If the purchaser is legally liable for the tax, then the purchaser will likely not be entitled to receive any tax credit in the United States in respect of the payment of any such taxes.

PFIC Rules. In general, a non-U.S. corporation will be classified as a “passive foreign investment company,” or PFIC, for U.S. federal income tax purposes, if either (i) 75% or more of its gross income consists of certain types of “passive” income or (ii) 50% or more of the fair market value of its assets (determined on the basis of a quarterly average) produce or are held for the production of passive income. For this purpose, cash is categorized as a passive asset. We will be treated as owning our proportionate share of the assets and earning our proportionate share of the income of any other corporation in which we own, directly or indirectly, 25% or more (by value) of the shares. We do not believe that we were a PFIC for the taxable year ended December 31, 2017. We do not anticipate being a PFIC for our current taxable year, although we can make no assurances in this regard. Our status as a PFIC in any year depends on our assets and activities in that year. We have no reason to believe that our assets or activities will change in a manner that would cause us to be classified as a PFIC for the current taxable year or for any future year, however this is a factual determination that is made annually and thus may be subject to change.

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If we were to be treated as a PFIC, unless a U.S. holder makes a valid election to be taxed annually on a mark-to-market basis with respect to the Class B Shares or ADSs, gain realized on the sale or other disposition of the shares or ADSs would in general not be treated as capital gain. Instead, the U.S. holder would be treated as if he had realized such gain and certain “excess distributions” ratably over the holding period for the shares or ADSs and would be taxed at the highest tax rate in effect for each such year to which the gain was allocated, together with an interest charge in respect of the tax attributable to each such year. With certain exceptions, Class B Shares or ADSs will be treated as stock in a PFIC if we were a PFIC at any time during the holding period of a U.S. holder. In addition, dividends received from us will not be eligible for the special tax rates applicable to qualified dividend income if we are treated as a PFIC (or are treated as a PFIC with respect to a U.S. holder) either in the taxable year of the distribution or the preceding taxable year, but instead will be taxable at rates applicable to ordinary income. Additionally, U.S. holders owning our ADSs or Class B Shares may be subject to certain reporting obligations with respect to our ADSs or Class B Shares for years in which we were a PFIC.
 
If we were to be treated as a PFIC, we do not intend to provide the information necessary for U.S. holders of our ADSs or Class B Shares to make “qualified electing fund,” or QEF, elections, which, if available, would result in tax treatment different from the general tax treatment for PFICs described above.
 
Each U.S. holder should consult its own tax advisors concerning the U.S. federal income tax consequences of holding and disposing of our ADSs or Class B Shares if we were, are or become classified as a PFIC, including the possibility of making a mark-to-market election.
 
Information Reporting and Backup Withholding. Dividend payments with respect to ADSs or Class B Shares and proceeds from the sale, exchange or redemption of ADSs or Class B Shares may be subject to information reporting to the IRS and possible U.S. backup withholding. Backup withholding will not apply to you, however, if you furnish a correct taxpayer identification number and make any other required certification or that are otherwise exempt from backup withholding. U.S. holders that are required to establish their exempt status generally must provide such certification on IRS Form W-9. You should consult your tax advisor regarding the application of the U.S. information reporting and backup withholding rules.

Backup withholding is not an additional tax. Amounts withheld as backup withholding can be credited against your U.S. federal income tax liability, and you may obtain a refund of any excess amounts withheld under the backup withholding rules by timely filing the appropriate claim for refund with the IRS and furnishing any required information in a timely manner.

Individual U.S. holders and certain entities may be required to submit to the IRS certain information with respect to his or her beneficial ownership of the ADSs or Class B Shares, if such ADSs or Class B Shares are not held on his or her behalf by a financial institution. This law also imposes penalties if an individual U.S. holder is required to submit such information to the IRS and fails to do so. All U.S. holders are urged to consult their tax advisors regarding the application of information reporting rules to them.

THE DISCUSSION OF U.S. FEDERAL INCOME TAX CONSEQUENCES ABOVE IS NOT TAX ADVICE AND IS NOT INTENDED TO CONSTITUTE A COMPLETE ANALYSIS OF ALL TAX CONSEQUENCES RELATING TO THE OWNERSHIP OR DISPOSITION OF ADSS OR CLASS B SHARES. ALL U.S. HOLDERS ARE URGED TO CONSULT THEIR TAX ADVISORS ABOUT THE APPLICATION OF THE U.S. FEDERAL TAX RULES TO THEIR PARTICULAR CIRCUMSTANCES AS WELL AS THE STATE, LOCAL AND FOREIGN TAX CONSEQUENCES TO THEM OF OWNERSHIP AND DISPOSITION OF ADSS OR CLASS B SHARES.
 
F. Dividends and Paying Agents
 
Not applicable.
 
G. Statement by Experts
 
Not applicable.

198
H. Documents on Display
 
We are subject to the informational requirements of the CNV and BYMA and file reports and other information relating to our business, financial condition and other matters with the CNV and BYMA. You may read such reports, statements and other information, including our publicly filed Financial Statements, at the public reference facilities of the CNV and BYMA maintained in Buenos Aires. We are also required to file annual and special reports and other information with the SEC. You may read and copy any documents filed by us at the SEC’s public reference room at 100 F Street, N.E., Room 1580, Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room. Our filings with the SEC will also be available to the public at the offices of the NYSE, 11 Wall Street, New York, New York 10005.

We have appointed Citibank NA to act as depositary for our ADRs. For so long as our ADRs are deposited with the depositary, we will furnish the depositary with our annual reports and summaries of all notices of general meetings of shareholders and other reports and communications that are made generally available to our shareholders.

The depositary will, as provided in the Deposit Agreement, arrange for the mailing of summaries in English of such reports and communications to all record holders of our ADRs. Any record holder of ADRs may read such reports, notices, or summaries thereof, and communications at the depositary’s office. The depositary’s office is located at 388 Greenwich Street–6th Floor New York, NY 10013.

Whenever a reference is made in this Annual Report to a contract or other document of ours, please be aware that such reference is not necessarily complete and that you should refer to the exhibits that are a part of the Annual Report for a copy of the contract or other document. You may review a copy of the Annual Report at the SEC’s public reference room in Washington, D.C.
 
I. Subsidiary Information
 
Not applicable.
 
J. Annual Report to Security Holders
 
Not applicable.
 
Item 11.
Quantitative and Qualitative Disclosures About Market Risk
 
Our activities are exposed to market risk, including the foreign exchange rate risk, the interest rate risk and the commodity price risk. Financial risks are those derived from financial instruments we are exposed to during or at the closing of each fiscal year. Our risk management policy is defined with the objective of reducing the impact of the loss of purchasing power. Based on this, the Management Committee is in charge of defining policies, procedures, limits and measures to mitigate the impact of such risks.

For further information on our market risks, please see Note 16 to our Audited Financial Statements.
 
199
Item 12.
Description of Securities Other than Equity Securities
 
American Depositary Shares

Fees and Charges Payable by a Holder of ADRs

Our ADSs are listed on the NYSE under the symbol “TGS.” Citibank NA is the Depositary of our ADSs pursuant to the Deposit Agreement. Each ADS represents the right to receive five shares.

Under the terms of the Deposit Agreement, as of the date of this Annual Report, an ADS holder may have to pay to the Depositary the fees specified in the table below.

The charges of the Depositary payable by investors are as follows:
 
 
Service
  
Rate
  
By Whom Paid
 
Issuance of ADSs (e.g., an issuance upon a deposit of Shares, upon a change in the ADS(s)-to-Share(s) ratio, or for any other reason), excluding issuances as a result of distributions described in the Deposit Agreement.
  
Up to US$5.00 per 100 ADSs (or fraction thereof) issued.
  
Person receiving ADSs.
 
Cancellation of ADSs (e.g., a cancellation of ADSs for delivery of deposited Shares, upon a change in the ADS(s)-to-Share(s) ratio, or for any other reason).
  
Up to US$5.00 per 100 ADSs (or fraction thereof) canceled.
  
Person whose ADSs are being canceled.
 
Distribution of cash dividends or other cash distributions (e.g., upon a sale of rights and other entitlements).
  
Up to US$5.00 per 100 ADSs (or fraction thereof) held.
  
Person to whom the distribution is made.
 
Distribution of ADSs pursuant to (i) stock dividends or other free stock distributions, or (ii) an exercise of rights to purchase additional ADSs.
  
Up to US$5.00 per 100 ADSs (or fraction thereof) held.
  
Person to whom the distribution is made.
 
Distribution of securities other than ADSs or rights to purchase additional ADSs (e.g., spin-off shares).
  
Up to US$5.00 per 100 ADSs (or fraction thereof) held.
  
Person to whom the distribution is made.
 
ADS Services.
  
Up to US$5.00 per 100 ADSs (or fraction thereof) held on the applicable record date(s) established by the Depositary.
  
Person holding ADSs on the applicable record date(s) established by the Depositary.
 
Disclosure for Fees Incurred in Past Annual Period. From January 1, 2025, to April 22, 2026, we received from the Depositary US$ 309,617.36 for the expenses incurred by us related to the administration and maintenance of the ADR program and investor relation activities .

200
PART II
 
Item 13.
Defaults, Dividend Arrearages and Delinquencies
 
No events required to be reported that would materially affect us have occurred.
 
Item 14.
Material Modifications to the Rights of Security Holders and Use of Proceeds
 
None.
 
Item 15.
Controls and Procedures.

A. Disclosure Controls and Procedures
 
We carried out an assessment under the supervision and with the participation of our management, including our CEO and CFO, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined under Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of December 31, 2025. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives. Based upon this assessment, our CEO and CFO concluded that our disclosure controls and procedures were effective in providing reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our CEO and CFO, as appropriate, to allow timely decisions regarding required disclosure.
 
B. Management’s Annual Report on Internal Control Over Financial Reporting
 
Our management, including our CEO and CFO, is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of Financial Statements for external purposes in accordance with applicable IFRS Accounting Standards.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2025. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (2013). Based on this assessment, management concluded that, as of the end of fiscal year 2025, our internal control over the financial reporting was effective.
 
C. Attestation Report of the Registered Public Accounting Firm
 
PwC and EY have jointly audited and reported on the effectiveness of our internal controls over financial reporting as of December 31, 2025, as stated in their reports appearing herein.
 
D. Changes in Internal Control Over Financial Reporting
 
There have not been any changes in our internal control over financial reporting during the year ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
 
201
Item 16.
[Reserved]
Item 16A.
Audit Committee Financial Expert
 
We have one audit committee financial expert serving on our Audit Committee. Our Board of Directors has identified Mr. Carlos Olivieri as an audit committee financial expert. Mr. Olivieri is an independent director within the meaning of Rule 10A-3 under the Exchange Act.
 
Item 16B. 
Code of Ethics
 
We have adopted a code of ethics (“Code of Ethics”), applicable to all employees, including our principal executive, accounting and financial officers, and all directors. We will provide our Code of Ethics to any person without charge. Our Code of Ethics is available both on our website at https://www.tgs.com.ar/investors/Corporate-governance and is part of our integrity program. The information on our website is not incorporated into this Annual Report.
 
Any waivers to the Code of Ethics for directors or executive officers requiring disclosure under the NYSE Standards will be disclosed on our website. For more information, see “Item 16G. Corporate Governance.”
 
Item 16C.
Principal Accountant Fees and Services
 
Audit and Non-Audit Fees
 
Fees billed for professional services provided to us by PwC and EY, during the years ended December 31, 2025 and 2024 in each of the following categories are:
 
  
Year ended December 31,
 
  
PwC
  
EY
 
  
2025
  
2024
  
2025
  
2024
 
  
(In thousands of pesos)
 
Audit fees
  
804,002
   
851,082
   
818,906
   
869,614
 
Audit related fees
  
54,788
   
-
   
24,078
   
-
 
Total fees
  
858,790
   
851,082
   
842,984
   
869,614
 

Audit fees. Audit fees in the table above represent services rendered for the audit of our annual Financial Statements for Form 20-F, the review of our quarterly reports, and services provided by PwC and EY in connection with statutory and regulatory filings or engagements.
 
Audit related fees. Audit related fees in the table above represent services rendered for the issuance of special reports in connection with filings to ENARGAS and the issuance of the 2035 Notes.
 
Audit Committee Pre-Approval Policies and Procedures
 
Consistent with SEC requirements regarding auditor independence, the Audit Committee pre-approves services prior to commencement of the specified service. Before the accountant is engaged to render audit or non-audit services, the Audit Committee must pre-approve the provision of services by our independent auditors prior to commencement of the specified service. The Audit Committee has delegated to its financial expert the authority to grant pre-approvals to auditors’ services. The decision of the financial expert to pre-approve a service is presented to the full Audit Committee at the next scheduled meetings.
 
All audit fees, audit-related fees, tax fees and other fees, if any, are submitted to our Audit Committee for prior approval. The Audit Committee evaluates the scope of the work to be performed by our accountants and the fees for such work prior to their engagement.
 
202
Consequently, all services and fees rendered by our independent auditors during the year ended December 31, 2025 were approved by the Audit Committee prior to their engagement to perform such work.
 
The general annual shareholders´ meeting designates the external auditor.
 
Item 16D. 
Exemptions from the Listing Standards for Audit Committees
 
None.
 
Item 16E. 
Purchases of Registered Equity Securities of the Issuer by the Issuer and Affiliated Purchasers
 
Not applicable.
 
Item 16F. 
Change in Registrant’s Certifying Accountant
 
None.
 
Item 16G
Corporate Governance
 
Our corporate governance practices are governed by:
 

 		•
applicable Argentine law (particularly, the General Companies Act),
 

 		•
the standards of BYMA,
 

 		•
Capital Markets Law and Decree No. 1,023/2013,
 

 		•
the standards of the CNV,
 

 		•
our Bylaws,
 

 		•
our integrity program and other internal control policies and procedures, and
 

 		•
certain rules of the NYSE applicable to listed foreign private issuers.
 
We have securities that are registered with the SEC and listed on the NYSE and, consequently, we are subject to the rules and regulations of the NYSE.

Under the Corporate Governance Standards issued by the NYSE Standards, non-U.S. companies are permitted, in general, to follow their home country corporate governance practices in lieu of the provisions included in such standards. However, non-U.S. companies must comply with sections 303A.06, 303A.11 and 303A.12(b) and (c).
 
Our Corporate Governance Guidelines are available on our website www.tgs.com.ar.
 
According to Section 303A.11 of the NYSE Standards, foreign private issuers must disclose any significant ways in which their corporate governance practices differ from those followed by U.S. issuers. Accordingly, the following list reflects such differences:
 
Directors
 
According to NYSE Standards, listed companies must have a majority of independent directors. Argentine law does not require a majority of independent directors, but does require at least two independent directors on the Audit Committee. At our Board of Directors meeting held on April 15, 2026, three independent directors, meeting the independence criteria set forth under SEC regulations and NYSE Standards (but under CNV regulations, two qualify as independents) were appointed to the Audit Committee. We also have three alternate directors who qualify as independent.

203
Meeting of Non-Management Directors
 
According to NYSE requirements, non-management directors must meet at regularly scheduled executive sessions without management. None of Argentine law, the CNV Rules or our Bylaws requires that any such meetings be held. Under Argentine law, a board of directors must meet at least once every three months.
 
Nominating/Corporate Governance Committee
 
U.S. listed companies must have a nominating/corporate governance committee composed entirely of independent directors. Argentine law and regulations do not require us to have a nominating or corporate governance committee.
 
Compensation Committee
 
U.S. listed companies must have a compensation committee composed entirely of independent directors. Argentine law and regulations do not require this committee. However, our Audit Committee is required to give an opinion about the reasonableness of directors’ fees and stock option plans (if applicable), as proposed by our Board of Directors, and the compensation paid to members of our Board of Directors is approved by our shareholders at their ordinary annual meeting.
 
Audit Committee
 
According to SEC regulations and NYSE Standards, listed companies must have an audit committee consisting of a minimum of three independent members. The members of the Audit Committee must be financially literate or must acquire such financial knowledge within a reasonable period and at least one of its members shall have expertise in accounting or financial management. Also, if a member of the Audit Committee is simultaneously a member of the Audit Committee of more than three public companies, and the listed company does not limit the number of Audit Committees on which its members may serve, then, in each case the Board of Directors shall determine whether the simultaneous service would prevent such member from effectively serving on the listed company’s Audit Committee, and shall disclose its decision in the annual proxy statement of the company or in the company’s annual report filed with the SEC.
 
Argentine law requires an Audit Committee to be comprised of at least three members with a majority of independent members. Pursuant to CNV standards, Audit Committee members are required to have knowledge in business, financial or accounting matters and issues. In addition, CNV standards require the training of Audit Committee members in the practice areas that would permit them to carry out their duties on the Audit Committee. Messrs. Carlos Olivieri, Carlos Alberto Di Brico and Luis Rodolfo Secco are independent directors under SEC regulations and NYSE Standards. Mr. Carlos Alberto Di Brico and Luis Rodolfo Secco are independent directors under CNV regulations.
 
Mr. Carlos Olivieri qualifies as a “financial expert” within the meaning of Item 16A of Form 20-F. See “Item 16A.  Audit Committee Financial Expert.” The Audit Committee’s functions and duties are similar to those required by the NYSE. Furthermore, Argentine law does not limit the number of audit committees on which a member of its Audit Committee may serve.
 
204
CEO’s Certification
 
Each listed company’s CEO must annually certify to the NYSE that he or she is not aware of any violation by the company of the NYSE’s corporate governance listing standards. There is no such requirement under Argentine law.
 
Item 16H.
Mine Safety Disclosure
 
Not applicable.
 
Item 16I.
Disclosure Regarding Foreign Jurisdictions that Prevent Inspection
 
Not applicable.

Item 16J. 
Insider Trading Policies
 
We have a “Stock Market Best Practices Policy” which establishes the procedures to be followed for executing purchase or sale transactions, or any type of transaction on any security listed on the stock markets of the company and its subsidiaries and/or affiliates. It ensures greater transparency by guaranteeing that no employee obtains any type of advantage or economic benefit for themselves or others through the misuse of the Company’s insider information or that of its subsidiaries and affiliated companies. All our employees must accept and comply with this policy.

No employee who possesses Insider Information can, until such information is publicly announced:

•
Use such Insider Information in order to obtain any type of advantage through the purchase, sale, or any type of transaction in the company’s securities listed on stock markets (Covered Securities).
 

 		•
Disclose or communicate Insider Information to third parties, except in the normal course of one’s work, position, or profession.
 

 		•
Based on Insider Information, recommend or advise a third party to execute any type of transaction in the company’s securities listed on stock markets.
 
Also, within the 12 and 14 previous days of the publication of quarterly and annual Financial Statements, respectively and 1 day after such publication, the policy states a temporary restriction period where it is forbidden to all the employees to execute any type of transaction in the company’s securities listed on stock markets, regardless, of whether they have Insider Information or not.
 
Any breach of the policy by the Company employees carries out sanctions, such as: i) warnings, ii) restitution of financial gains obtained by the infringing Applicable Recipient, iii) other sanctions provided for in the Employment Contracts Act.

205
Item 16K.
Cybersecurity
 
We regularly assess risks from cybersecurity threats, monitor our information systems for potential vulnerabilities and tests those systems pursuant to our cybersecurity, policies, standards, processes and practices. To protect our information systems from cybersecurity threats, we use various security tools that help us to identify, escalate, investigate, resolve and recover from security incidents in a timely manner. These efforts include, among other things: mandatory trainings and drills on phishing attacks for all our employees and penetration testing, to help us evaluate the effectiveness of our information security processes and improve our security measures and planning.

Our cybersecurity program includes an incident response plan to engage cross-functionally across our company and report cybersecurity incidents to appropriate levels of management, including senior management, and the Audit Committee or Executive Committee, based on potential impact. We conduct annual cybersecurity awareness training and routinely test cybersecurity awareness. In addition, we engage third-party cybersecurity experts to test, evaluate and recommend improvements on the effectiveness of our cybersecurity program through penetration testing, breach assessments, regular cybersecurity incident drill testing. Our cybersecurity risk management processes extend to the oversight and identification of threats associated with our use of third-party service providers. We require in our contracts that third-party services comply with our security policies through Request for Proposals (RFPs).

Our cybersecurity governance is guided by the framework established under SEC regulations and aligned with international standards (ISO 27001 and C2M2). This framework provides a structured reference to support our cybersecurity governance and assists us in identifying potential compliance gaps, if any.

Governance

Our board of directors, through the Audit Committee, oversees the risk management process, including on cybersecurity risks. The risk management program, focuses on the most significant risks that we face in the short-, intermediate-, and long-term timeframe. Audit Committee meetings include discussions of specific risk areas throughout the year, including, among others, those relating to cybersecurity. 

Annually and on an as-necessary basis, members of management and/or of the risk committee provide presentations to the Audit Committee regarding cybersecurity matters, including any material risks. These presentations include information regarding cybersecurity risks, the evolution of those risks and initiatives to optimize and improve the processes of cybersecurity.

We take a risk-based approach to cybersecurity and have implemented cybersecurity policies throughout our operations that are designed to address cybersecurity threats and incidents. In particular, in the event of a specific cybersecurity incident, these presentations include information about the relevant security incident, such as incident status, informed stakeholders and remediation plans.

Our Chief Information Security Officer (“CISO”), in coordination with "Planning and risk management," is responsible for leading the assessment and management of cybersecurity risks. The current CISO has over 20 years of experience in information security with expertise in the design, implementation, auditing, and analysis of cybersecurity risks. She holds diplomas in Cybersecurity and Industrial Cybersecurity She stays up-to-date by attending cybersecurity specific conferences and congress. The CISO provides regular reports to the Corporation’s senior management throughout the year, and to the Audit Committee or the Executive Committee, as appropriate, in its annual cybersecurity review. Such reports typically address, among other things, the Corporation’s cybersecurity strategy, initiatives, key security metrics, penetration testing and benchmarking learnings, and business response plans as well as the evolving cybersecurity threat landscape. As of the date of this Annual Report, we have not identified any risks from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have materially affected, or are reasonably likely to materially affect us, including our business strategy, results of operations, or financial condition. While we believe our cybersecurity program to be appropriate for managing constantly evolving cybersecurity risks, no program can fully protect against all possible adverse events.For additional information on these risks and potential consequences if the measures we are taking prove to be insufficient or if our proprietary data is otherwise not protected, see “Item 3. Key Information—D. Risk Factors—Our business has become dependent on digital technologies to conduct day-to-day operations and we may be subject to cyberattacks or other risks related to new technologies.”

206
PART III
 
Item 17. 
Financial Statements
 
The registrant has responded to Item 18 in lieu of responding to this Item 17.

Item 19.
Exhibits

No.
 
Corporate Charter and Bylaws.(2)
Bylaws Amendments.(1)
Indenture dated July 24, 2024, entered into among us, Delaware Trust Company as trustee, co-registrar, paying agent and transfer agent, and Banco Santander Rio S.A., as registrar, Argentine paying agent, Argentine transfer agent and representative of the trustee in Argentina, relating to the issuance of our 8.500% senior notes due 2031.(10)
Indenture dated November 20, 2025, entered into among us, Delaware Trust Company as trustee, co-registrar, paying agent and transfer agent, and Banco Santander Rio S.A., as registrar, Argentine paying agent, Argentine transfer agent and representative of the trustee in Argentina, relating to the issuance of our 7.750% senior notes due 2035.
Officers’ Certificate establishing the terms of our 8.500% senior notes due 2031.(10)

207
Officers’ Certificate establishing the terms of our 7.750% senior notes due 2035.
Description of Securities Registered under Section 12 of the Exchange Act.(3)
CIESA Shareholders’ Agreement.(5)
CIESA’s Fourth Amendment to the Restructuring Agreement.(6)
CIESA’s Settlement Agreement.(5)
Technical Assistance Service Agreement between Pampa Energía and us, dated December 26, 2017.(2)
Financial lease agreement between Petrobras Argentina and us, dated July 25, 2016.(7)
List of our Subsidiaries.
Code of Ethics.(4)
Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Audit Committee Charter.(8)
Insider Trading Policy
Clawback Policy(9)

(1) 
Amendment incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2015 (Commission File No. 1-13396), (ii) amendment previously filed with the SEC pursuant to current report on Form 6-K, dated April 12, 2017 (Commission File No. 1-13.396), and (iii) amendment previously filed with the SEC pursuant to current report on Form 6-K, dated April 8, 2021 (Commission File No. 1-13.396).

(2)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2018 (Commission File No. 1-13396).

(3)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2019 (Commission File No. 1-13396).

(4)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2005 (Commission File No. 1-13396).

(5)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2012 (Commission File No. 1-13396).

(6)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2010 (Commission File No. 1-13396).

(7)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2017 (Commission File No. 1-13396).

(8)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2003 (Commission File No. 1-13396).

(9)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2023 (Commission File No. 1-13396).

(10)
Incorporated by reference to our Annual Report on Form 20-F filed with the SEC for the year ended December 31, 2024 (Commission File No. 1-13396).

We agree to furnish to the SEC upon request any instrument with respect to long-term debt that we have not filed as an exhibit pursuant to the exemption provided by instruction 2(b)(i) to Item 19 of Form 20-F.

208
SIGNATURES
 
The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this Annual Report on its behalf.
 


TRANSPORTADORA DE GAS DEL SUR S.A. (Registrant)
   
 
 By:
/s/ Oscar José Sardi
  
Name: Oscar José Sardi
  
 Title: Chief Executive Officer
  
  
/s/ Alejandro M. Basso
  
Name: 
Alejandro M. Basso
  
Title:
Chief Financial Officer and Services Vice President
  
Dated: April 22, 2026.
 

209
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRMS
 
To the Board of Directors and Shareholders of
Transportadora de Gas del Sur S.A.

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated statements of financial position of Transportadora de Gas del Sur S.A. and its subsidiaries (together the “Company”) as of December 31, 2025 and 2024, the related consolidated statements of comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”).  In our opinion, the consolidated financial statements present fairly, in all material respects, the financial positionof the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with IFRS Accounting Standards as issued by the International Accounting Standards Board.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in the Internal Control–Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated April 22, 2026 expressed an unqualified opinion thereon.
 
Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management.  Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits.  We are public accounting firms registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these consolidated financial statements in accordance with the standards of the PCAOB.  Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks.  Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements.  Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements.  We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

F - 1
Recoverability of Property, Plant & Equipment of the Natural Gas Transportation cash-generating unit
 
Description of the matter

As discussed in Notes 4.j) and 5.a) to the consolidated financial statements, at December 31, 2025, the Company’s net book value of Property, Plant & Equipment (“PPE”) related to the Natural Gas Transportation cash-generating unit (“CGU”) was Argentine Pesos 1,667,840 million.  PPE is tested to evaluate whether there are significant events or changes that could have an adverse effect on the Company or will take place in the near future that could affect the recoverable amount of PPE. To assess the existence of impairment indicators, management analyzed a series of assumptions and judgments based on information from both internal and external sources, such as tariff increases and the recognition of cost adjustments, as well as the behavior of macroeconomic variables including discount rates and market rates. During the year ended December 31, 2025, management has not identified any indicators of impairment of PPE of the Natural Gas Transportation CGU.

The principal considerations for our determination that performing procedures relating to the recoverability of PPE of the Natural Gas Transportation CGU is a critical audit matter are the significant judgment by management in assessing the existence of impairment indicators in this CGU that has historically exhibited greater sensitivity to changes in economic and regulatory conditions, a high degree of auditor judgment, subjectivity and effort in performing procedures and evaluating management’s  conclusions in the process of identifying impairment indicators from internal and external sources, including significant assumptions related  to  tariff increases and the recognition of cost adjustments, as well as the behavior of macroeconomic variables including discount rates and market rates. In addition, the audit effort involved professionals with specialized skill and knowledge.

How we addressed the matter in our audit

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These audit procedures included obtaining an understanding, evaluating the design and testing the operating effectiveness of controls over management’s process to assess the existence of impairment indicators. These procedures also included, among others, evaluating the rationale developed by management to support the absence of impairment indicators and testing the aforementioned significant assumptions and the completeness, accuracy, and relevance of underlying data used. The significant assumptions were compared with available economic trend data, sensitivity analyses of the significant assumptions were performed to evaluate the changes in  the value in use estimated in the 2024 impairment assessment that would result from changes in the assumptions, and the disclosures in the consolidated financial statements were assessed. Professionals with specialized skill and knowledge were involved to assist in the evaluation of the significant assumptions used in the assessment of the existence of impairment indicators by management.

/s/ Price Waterhouse & Co. S.R.L.
/s/ Pistrelli, Henry Martin y Asociados S.A.
  
/s/Paula Veronica Aniasi
Member of Ernst & Young Global Limited

Price Waterhouse & Co. S.R.L (“PwC”) has served as the Company’s auditor since 2012. PwC and Pistrelli, Henry Martin y Asociados S.A. have served as the Company’s joint auditors since 2017.
 
City of Buenos Aires, Argentina
April 22, 2026

F - 2
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRMS

To the Board of Directors and Shareholders of
Transportadora de Gas del Sur S.A.

Opinion on Internal Control over Financial Reporting

We have audited Transportadora de Gas del Sur S.A. and its subsidiaries (together the “Company”) internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (“the COSO criteria”). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated statements of financial position of the Company as of December 31, 2025 and 2024, and the related consolidated statements of comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”), and our report dated April 22, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reportingincluded in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.  We are public accounting firms registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB.  Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

F - 3
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Price Waterhouse & Co. S.R.L.
/s/ PISTRELLI, HENRY MARTIN Y ASOCIADOS S.A.
  
/s/ Paula Verónica Aniasi
Member of Ernst & Young Global Limited

City of Buenos Aires, Argentina
April 22, 2026

F - 4
TRANSPORTADORA DE GAS DEL SUR S.A.
CONSOLIDATEDSTATEMENTS OF COMPREHENSIVE INCOME
FOR THE YEARS ENDED DECEMBER 31, 2025, 2024 AND 2023
 (Stated in thousands of pesos as described in Note 3 and 4.d. except for share and per share information)

  
Notes
  
2025
  
2024
  
2023
 
             
Revenues
  
8.h.
   
1,720,626,082
   
1,604,587,432
   
1,297,140,194
 
Net cost of sales
  
8.i

  
(787,387,910
)
  
(756,721,270
)
  
(815,697,900
)
Gross profit
      
933,238,172
   
847,866,162
   
481,442,294
 
                 
Administrative expenses
  
8.j.
   
(67,189,948
)
  
(62,390,528
)
  
(58,568,572
)
Selling expenses
  
8.j.
   
(115,259,291
)
  
(101,607,971
)
  
(87,148,189
)
Other operating results, net
  
8.l.
   
(47,307,739
)
  
1,072,637
   
(2,173,662
)
Reversal of Impairment of PPE
  5.a.   -   52,126,669   - 
Operating profit
      
703,481,194
   
737,066,969
   
333,551,871
 
                 
Net financial results
                
Financial income
  
8.k.
   
218,465,752
   
152,853,649
   
843,369,691
 
Financial expenses
  
8.k.
   
(386,262,883
)
  
(272,936,847
)
  
(1,442,934,673
)
Other financial results
  
8.k.
   
163,517,751
   
213,439,393
   
552,985,538
 
(Loss) / Gain on net monetary position
  
8.k.
   
(58,886,419
)
  
(64,994,633
)
  
(161,912,121
)
Total net financial results
      
(63,165,799
)
  
28,361,562
   
(208,491,565
)
                 
Share of profit / (loss) from associates
  
11
   
3,727,703
   
320,716
   
(87,083
)
                 
Net income before income tax
      
644,043,098
   
765,749,247
   
124,973,223
 
                 
Income tax expense
  
14
   
(223,182,952
)
  
(278,803,758
)
  
(57,602,212
)
                 
Total comprehensive income for the year
      
420,860,146
   
486,945,489
   
67,371,011
 
                 
Total comprehensive income attributable to:
                
Owners of the Company
      
420,859,657
   
486,945,767
   
67,369,367
 
Non-controlling interests
      
489
   
(278
)
  
1,644
 
Total comprehensive income for the year
      
420,860,146
   
486,945,489
   
67,371,011
 
                 
Total comprehensive income per share attributable to owners of the Company:
                
Weighted average number of outstanding ordinary shares
      
752,761,058
   
752,761,058
   
752,761,058
 
Basic and diluted earnings per share
      
559.09
   
646.88
   
89.50
 

The accompanying notes are an integral part of these consolidated financial statements.

F - 5
TRANSPORTADORA DE GAS DEL SUR S.A.
CONSOLIDATEDSTATEMENTS OFFINANCIAL POSITION
AS OF DECEMBER 31, 2025 AND 2024
 (Stated in thousands of pesos as described in Note 3 and 4.d.)

  
Notes
  
2025
  
2024
 
ASSETS
         
          
Non-current assets
         
Property, plant and equipment
  
12
   
3,171,441,918
   
3,137,276,275
 
Investments in associates
  
9
   
5,339,609
   
1,611,906
 
Deferred income tax asset
  
14
   
51,733
   
6,464
 
Other receivables
  
8.a.
   
431,397
   
575,393
 
Total non-current assets
      
3,177,264,657
   
3,139,470,038
 
             
Current assets
            
Other receivables
  
8.a.
   
221,764,185
   
68,152,310
 
Inventories
      
10,364,857
   
4,820,873
 
Trade receivables
  
8.b.
   
196,614,744
   
205,237,736
 
Contract assets
      
27,278
   
34,286
 
Financial assets measured at amortised cost
  
8.m.
   
355,915,568
   
357,298,924
 
Financial assets at fair value through profit or loss
  
8.n.
   
648,152,264
   
611,643,130
 
Cash and cash equivalents
  
8.c.
   
804,106,528
   
78,894,638
 
Total current assets
      
2,236,945,424
   
1,326,081,897
 
Total Assets
      
5,414,210,081
   
4,465,551,935
 
             
EQUITY
            
Common stock
      
971,540,432
   
971,540,432
 
Treasury shares
      
-
   
53,863,390
 
Cost of acquisition of treasury shares
      
-
  
(97,455,079
)
Additional paid-up capital
      
(71,862,545
)
  
(28,270,856
)
Legal reserve
      
156,136,573
   
131,789,284
 
Reserve for capital expenditures, acquisition of treasury shares and/or dividends
      
1,651,188,520
   
1,419,742,302
 
Accumulated retained earnings
      
420,859,657
   
486,945,767
 
Equity attributable to equity holders of the parent
      3,127,862,637   2,938,155,240 
Non-controlling interests
      
2,835
   
2,346
 
Total equity
      
3,127,865,472
   
2,938,157,586
 
             
LIABILITES
            
             
Non-current liabilities
            
Deferred tax liabilities
  
14
   
240,517,691
   
235,078,977
 
Contract liabilities
  
8.d.
   
137,864,649
   
146,961,103
 
Loans
  
13
   
1,460,728,384
   
659,997,560
 
Total non-current liabilities
      
1,839,110,724
   
1,042,037,640
 
             
Current liabilities
            
Provisions
  
15
   
960,395
   
553,945
 
Contract liabilities
  
8.d.
   
8,861,803
   
9,817,028
 
Other payables
  
8.e.
   
346,889
   
320,957
 
Taxes payables
  
8.f.
   
11,432,934
   
14,172,523
 
Income tax payable
      
52,627,834
   
230,851,260
 
Payroll and social security taxes payable
  
8.o.
   
27,670,338
   
25,583,998
 
Loans
  
13
   
244,877,733
   
103,129,469
 
Trade payables
  
8.g.
   
100,455,959
   
100,927,529
 
Total current liabilities
      
447,233,885
   
485,356,709
 
             
Total liabilities
      
2,286,344,609
   
1,527,394,349
 
             
Total equity and liabilities
      
5,414,210,081
   
4,465,551,935
 

The accompanying notes are an integral part of these consolidated financial statements.

F - 6
TRANSPORTADORA DE GAS DEL SUR S.A.
CONSOLIDATED STATEMENTS OFCHANGES IN EQUITY
FOR THE YEARS ENDED DECEMBER 31, 2025, 2024 AND 2023
 (Stated in thousands of pesos as described in Note 3 and 4.d.)

  
Shareholders’ Contributions
  
Retained Earnings
          
  
Outstanding shares
  
Treasury shares
                               
                          
Reserve for
                
     Inflation     Inflation  Acquisition           
capital expenditures,
               
      adjustment    adjustment   
cost
  Additional         acquisition of  Accumulated          Non-     
  Common   to common   
Common		  
to common
  
of treasury
  
paid-up
        
treasury shares
   retained
       Controlling   
  stock  
stock
  stock (1)  
stock (1)
  shares (1)  capital   Subtotal  
Legal reserve
  
and/or dividends
  
earnings
  Subtotal   Total   interests  Total 
Balances at December 31, 2022
  
752,761
   
970,787,671
   
41,734
   
53,821,656
   
(97,455,079
)
  
(28,270,856
)
  
899,677,887
   
114,005,868
   
1,081,857,422
   
288,298,929
   
1,484,162,219
   
2,383,840,106
   
980
   
2,383,841,086
 
                                                         
Resolutions of the Ordinary, Extraordinary and Special Shareholders´
                                                        
Meeting held on April 19, 2023
                                                        
Legal Reserve
  
-
   
-
   
-
   
-
   
-
   
-
   
-
   
14,414,947
   
-
   
(14,414,947
)
  
-
   
-
   
-
   
-
 
Derecognition of reserves
  
-
   
-
   
-
   
-
   
-
   
-
   
-
   
-
   
(1,081,857,422
)
  
1,081,857,422
   
-
   
-
   
-
   
-
 
Reserve for capital expenditures, acquisition of treasury
shares and/or dividends
  -   -   -   -   -   -   -   -   1,355,741,404   (1,355,741,404)  -   -   -   - 
 
                                                        
Comprehensive income for the year
  
-
   
-
   
-
   
-
   
-
   
-
   
-
   
-
   
-
   
67,369,367
   
67,369,367
   
67,369,367
   
1,644
   
67,371,011
 
 
                                                        
Balances at December 31, 2023
  
752,761
   
970,787,671
   
41,734
   
53,821,656
   
(97,455,079
)
  
(28,270,856
)
  
899,677,887
   
128,420,815
   
1,355,741,404
   
67,369,367
   
1,551,531,586
   
2,451,209,473
   
2,624
   
2,451,212,097
 

                                                        
Resolutions of the Ordinary, Extraordinary ans Special Shareholders´
                                                        
Meeting held on April 17, 2024                                                        
Legal Reserve
  -   -   -   -   -   -   -   3,368,469   -   (3,368,469)  -   -   -   - 
Derecognition of reserves
  -   -   -   -   -   -   -   -   (1,355,741,404)  1,355,741,404   -   -   -   - 
Reserve for capital expenditures, acquisition of treasury shares and/or dividends
  -   -   -   -   -   -   -   -   1,419,742,302   (1,419,742,302)  -   -   -   - 

                                                        
Comprehensive income for the year   -   -   -   -   -   -   -   -   -   486,945,767   486,945,767   486,945,767   (278)  486,945,489 
                                                         
Balances at December 31, 2024  752,761   970,787,671   41,734   53,821,656   (97,455,079)  (28,270,856)  899,677,887   131,789,284   1,419,742,302   486,945,767   2,038,477,353   2,938,155,240   2,346   2,938,157,586 

                                                        
Resolutions of the Ordinary, Extraordinary and Special Shareholders´
                                                        
Meeting held on April 30, 2025                                                        
Legal Reserve
  -   -   -   -   -   -   -   24,347,289   -   (24,347,289)  -   -   -   - 
Derecognition of reserves
  -   -   -   -   -   -   -   -   (1,419,742,302)  1,419,742,302   -   -   -   - 
Reserve for capital expenditures, acquisition of treasury shares and/or dividends
  -   -   -   -   -   -   -   -   1,882,340,780   (1,882,340,780)  -   -   -   - 
 Common stock reduction (1)
  -   -   (41,734)  (53,821,656)  97,455,079   (43,591,689)  -   -   -   -   -   -   -   - 
                                                         
Dividend payment approved by the Board of Director´s Meeting
held on May 28, 2025
  -   -   -   -   -   -   -   -   (231,152,260)  -   (231,152,260)  (231,152,260)  -   (231,152,260)
                                                         
Comprehensive income for the year   -   -   -   -   -   -   -   -   -   420,859,657   420,859,657   420,859,657   489   420,860,146 

                                                        
Balances at December 31, 2025  752,761   970,787,671   -   -   -   (71,862,545)  899,677,887   156,136,573   1,651,188,520   420,859,657   2,228,184,750   3,127,862,637   2,835   3,127,865,472 

(1)
See Note 19 to these consolidated financial statements.

The accompanying notes are an integral part of these consolidated financial statements.

F - 7

TRANSPORTADORA DE GAS DEL SUR S.A.
CONSOLIDATED STATEMENTS OF CASH FLOWS
FOR THE YEARS ENDED DECEMBER 31, 2025, 2024 AND 2023
 (Stated in thousands of pesos as described in Note 3 and 4.d.)

  
2025
  
2024
  
2023
 
CASH FLOWS PROVIDED BY OPERATING ACTIVITIES
         
          
Total comprehensive income for the year
  
420,860,146
   
486,945,489
   
67,371,011
 
             
Reconciliation of total comprehensive income to cash flows provided by operating activities:
            
             
Depreciation of property, plant and equipment
  
201,961,353
   
170,574,036
   
173,677,316
 
Disposal and retirements of property, plant and equipment
  
6,850,652
   
3,701,468
   
3,180,992
 
Share of (gain) / loss from associates
  
(3,727,703
)
  
(320,716
)
  
87,083
 
Increase / (Decrease) in provisions
  
593,899
   
(2,572,940
)
  
4,100,542
 
Interest expense accrual, net
  
86,605,290
   
77,386,888
   
70,273,366
 
Fair value gains and interest inocome on other financial assets other than cash and cash equivalents
  
(187,579,270
)
  
(246,522,476
)
  
(572,095,318
)
Income tax
  
223,182,952
   
278,803,758
   
57,602,212
 
Reversal of Impairment of Property, plant and equipment
  
-
   
(52,126,669
)
  
-
 
Impairment of financial assets (Note 8.b)
  11,078,767   -   488,750 
Foreign exchange loss
  
156,273,721
   
112,036,363
   
690,516,847
 
Loss on net monetary position
  
29,943,886
   
12,695,618
   
141,146,213
 
             
Changes in assets and liabilities:
            
Trade receivables
  
(70,313,211
)
  
(158,985,833
)
  
(111,381,762
)
Other receivables
  
(112,023,952
)
  
(57,743,670
)
  
(41,900,986
)
Inventories
  
(6,700,153
)
  
5,267,966
   
(16,717,351
)
Trade payables
  
46,867,029
   
40,061,923
   
84,095,717
 
Contract assets
  
(1,215
)
  
(8,078
)
  
11,805
 
Payroll and social security taxes
  
8,222,038
   
17,394,716
   
9,708,993
 
Taxes payables
  
659,345
   
10,709,852
   
4,671,164
 
Other payables
  
102,906
   
223,119
   
(616,855
)
Provisions
  
-
   
-
   
(13,315
)
Interest paid
  
(65,025,021
)
  
(42,177,322
)
  
(45,224,646
)
Income tax paid
  
(186,112,938
)
  
(5,250,394
)
  
(32,027,030
)
Contract liabilities
  
(10,051,679
)
  
(13,177,934
)
  
56,101,727
 
             
Cash flows provided by operating activities
  
551,666,842
   
636,915,164
   
543,056,475
 
             
CASH FLOWS USED IN INVESTING ACTIVITIES
            
             
Additions and prepayments to property, plant and equipment
  
(320,462,989
)
  
(381,242,523
)
  
(386,965,918
)
Payments for purchases of financial assets not considered as cash and cash equivalents, net
  (86,300,854)  (125,085,849)  (204,379,941)
Payments for purchases of financial assets not considered as cash and cash equivalents 
  (541,712,375)  -   - 
Proceeds from sales of financial assets not considered cash and cash equivalents
  
493,982,140
   
-
   
-
 
             
Cash flows used in investing activities
  
(454,494,078
)
  
(506,328,372
)
  
(591,345,859
)
             
CASH FLOWS (USED IN) / PROVIDED BY FINANCING ACTIVITIES
            
             
Proceeds from loans
  
887,256,557
   
770,027,997
   
102,393,769
 
Payments of loans
  
(582,140
)
  
(810,265,371
)
  
(31,198,443
)
Payments of dividends  (231,152,260)  -   - 
Payments of leases
  (828,254)  (1,001,133)  (573,754)
             
Cash flows (used in) / provided by financing activities
  
654,693,903
   
(41,238,507
)
  
70,621,572
 
             
NET INCREASE IN CASH AND CASH EQUIVALENTS
  
751,866,667
   
89,348,285
   
22,332,188
 
             
Cash and cash equivalents at the beginning of the year
  
78,894,638
   
18,904,419
   
26,663,639
 
             
Foreign exchange gain on Cash and cash equivalents
  
16,197,714
   
224,885
   
4,156,730
 
             
Monetary results effect on Cash and cash equivalents
  
(42,852,491
)
  
(29,582,951
)
  
(34,248,138
)
             
Cash and cash equivalents at the end of the year
  
804,106,528
   
78,894,638
   
18,904,419
 

The accompanying notes are an integral part of these consolidated financial statements.
For further information, see Note 6.

F - 8
TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

1.
BUSINESS DESCRIPTION

Business Overview

Transportadora de Gas del Sur S.A. (“tgs” or the “Company”) is one of the companies created as a result of the privatization of Gas del Estado S.E. (“GdE”). tgs commenced operations on December 28, 1992 and it is mainly engaged in the Transportation of Natural Gas, and Production and Commercialization of natural gas Liquids (“Liquids”). tgs’s pipeline system connects major natural gas fields in southern and western Argentina with natural gas distributors and industries in those areas and in the greater Buenos Aires area. The natural gas transportation license to operate this system was exclusively granted to tgs for a period of thirty-five years (“the License”). On July 24, 2025, tgs was granted with a 20 years extension of the Licence, expiring on December 28, 2047. The General Cerri Gas Processing Complex (the “Cerri Complex”), where TGS processes natural gas to obtain liquids, was transferred from GdE along with the gas transmission assets. tgs also provides midstream services, which mainly consist of gas treatment, removal of impurities from the natural gas stream, gas compression, wellhead gas gathering and pipeline construction, operation and maintenance services. In addition, telecommunications services are provided through the subsidiary Telcosur S.A. (“Telcosur”). These services consist of data transmission services through a network of terrestrial and digital radio relay.

Subsequently, the corporate purpose of the Company was modified to incorporate the development of complementary activities, incidental, linked and / or derived from natural gas transportation, such as the generation and commercialization of electric power and the provision of other services for the hydrocarbon sector in general.

Major Shareholders

As of December 31, 2024, tgs’ controlling shareholder Compañía de Inversiones de Energía S.A. (“CIESA”), held 51% of the common stock of the company, the National Social Security Administration (“ANSES”) held 24% and the remaining 25% was held by the investing public on the Bolsa de Comercio de Buenos Aires and the New York Stock Exchange ( “NYSE”) (tgs had 5.25% of the shares in the portfolio).

On April 30, 2025, the Ordinary, Extraordinary and Special General Shareholders' Meeting approved the reduction of the Company's share capital, in accordance with the provisions of Note 19 – Common stock and Dividends. Following this decision, the Company´s share capital was structured as follows: CIESA holds 53.83%, ANSES holds 25.33% and the general public hold the remaining 20.84%.

CIESA is under joint control of Pampa Energía S.A. (“Pampa Energía”) with 50% and Grupo Inversor Petroquímica S.L. (“GIP”) and PCT L.L.C. with the remaining 50%.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

The following table shows the organizational structure, shareholders and related parties of tgs as of December 31, 2025:

graphic

46.17%,  20.84%,, 99.98%, 0.02%, 49%, 25.5%, 20.4%, 5.10%

Dedicated Branch 1 – Perito Moreno Pipeline Expansion (the “Dedicated Branch”)

In 2024, the Company submitted a Private Initiative to the National Ministry of Economy for the expansion of the transportation capacity of Section I of the Perito Francisco Pascasio Moreno Gas Pipeline (“GPM”), which runs from Tratayén (Neuquén) to Salliqueló (Buenos Aires). The project aims to increase the natural gas transportation capacity by 14 MMm³/d, in exchange for which the awarded party will be granted such capacity for a period of 15 years, including the operation and maintenance of the pipeline and complementary infrastructure.

The project was declared of national public interest and authorized for bidding by ENARSA. In this context, on May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, which was awarded to tgs and approved by the Secretariat of Energy on October 17, 2025.

Additionally, tgs committed to carrying out a complementary expansion in the final sections of its licensed system, works necessary to achieve the project’s objectives.

The works are scheduled to be completed by April 30, 2027.

The project will be developed under the Large Investments Incentive Regime (RIGI), established by Law No. 27,742 and Decrees No. 749/2024 and 940/2024, which promotes long-term investments in strategic sectors. To this end, the Company established a Dedicated Branch that will act as a Single Project Vehicle (SPV) under the name “Transportadora de Gas del Sur S.A. – Sucursal Dedicada 1”, with the exclusive purpose of executing and operating the GPM expansion project. The request for adhesion was submitted on October 26, 2025. As of the date of issuance of these Consolidated Financial Statements, the regulatory authority has not issued a ruling on the matter.

For further information, see Note 17.d) Regulatory Framework – Dedicated Branch.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Economic context

The Company operates in a complex economic context whose main variables have recently had strong volatility as a result of political and economic events at the national level.

Among the main macroeconomic variables for 2025, we can mention:

•
The CPI for 2025 was 31.5%, showing a marked deceleration compared to the 117.8% recorded in 2024. Throughout the year, monthly inflation remained around 2%, reaching the lowest level in more than three years.

•
The WPI variation for fiscal year 2025 was 26.2% versus 67.1% in the previous year, reflecting wholesale price stability within the framework of the economic program.

•
Following the implementation of the exchange rate band flotation regime on April 11, 2025, the official exchange rate moved within the limits established by the Argentine Central Bank (“BCRA”), showing a relatively contained trajectory. The exchange rate published by Banco Nación Argentina (BNA) closed 2025 at ARS 1,455 per U.S. dollar, up from ARS 1,032 as of December 31, 2024, representing an annual increase of 41%, which exceeded the accumulated inflation of 31.5% as measured by the CPI. As for the exchange rate gap, levels throughout most of 2025 remained significantly below those observed in prior years, with further compression episodes toward year end.

•
Economic activity: GDP recorded growth of 3.3% in the third quarter of 2025, driven by the energy sector and exports, although with heterogeneity in domestic consumption. The Monthly Economic Activity Estimator (EMAE) showed positive variations in the last quarter, consolidating the recovery after the 2.1% decline recorded in 2024.

•
The Salary Index for 2025 recorded a year‑over‑year increase of 38.2%, remaining above the inflation rate for the period and reflecting an improvement in workers’ purchasing power. Meanwhile, the unemployment rate for the third quarter of 2025 stood at 6.6%, showing a slight improvement compared with previous periods, although within a context of persistent pressure on the labor market and high levels of informality.

•
Net international reserves of the BCRA reached US$ 41,167million at year-end 2025, compared to US$ 29,612 million in December 2024, driven by the trade surplus and external financing.

•
The trade balance closed with a surplus of US$ 11,286million, supported by higher energy and agribusiness exports and by the reduction in imports within the framework of exchange rate normalization.

•
The government maintained both the primary and financial surplus for the second consecutive year, equivalent to approximately 1.4% and 0.2% of GDP, respectively, consolidating the fiscal adjustment policy initiated in 2024.

During 2025, the Government reached an Extended Fund Facility agreement with the International Monetary Fund (IMF) for US$ 20,000 million, with a duration of 48 months. This agreement, together with additional financing from multilateral organizations amounting to US$ 3,100 million, supports the next phase of the economic program, focused on stabilization and structural reforms.

This phase, announced on April 11, mainly includes: (i) the flexibilization of the exchange rate regime, under which the U.S. dollar quotation in the Foreign Exchange Market (MLC) may fluctuate within a moving band between Ps. 1,000 and Ps. 1,400, whose limits were previously expanded at a monthly rate of 1%. However, as from January 1, 2026, the floor and ceiling of the exchange band began to be updated daily based on the latest monthly inflation data published by INDEC, replacing the prior mechanism of a fixed 1% monthly adjustment; (ii) the elimination of the “dólar blend”; (iii) the removal of foreign exchange restrictions for individuals; (iv) authorization for the distribution of dividends to foreign shareholders starting from fiscal years beginning in 2025 (i.e., payments may be made as from 2026); and (v) relaxation of deadlines for the settlement of foreign trade transactions.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The flexibilizations for the settlement of foreign trade transactions include:

•
Elimination of the 30-day waiting period from customs clearance of goods.
•
Removal of the deadline for payment of services counted from their provision.
•
Authorization to pay for services rendered by related companies starting 90 days after their provision.
•
Small and medium-sized enterprises may make payments from the dispatch of goods at the port of origin.
•
Payment terms for the import of capital goods have been eased, now allowing a 30% advance payment.

Regarding monetary policy, the commitment to refrain from issuing pesos to finance the fiscal deficit or to remunerate the BCRA’s monetary liabilities was maintained, thereby reinforcing the nominal anchor of the economic program.

On September 7, 2025, legislative elections were held in the Province of Buenos Aires, in which the ruling party suffered a significant defeat against the opposition coalition Fuerza Patria, which obtained a lead of more than 13 percentage points. This result, considered a key political test ahead of the national elections in October, generated uncertainty in financial markets. In the following days, an increase in the country risk index was observed, along with pressures on the exchange rate and adjustments in inflation expectations. The official dollar rose Ps. 45 in a single day, approaching the upper limit of the floating band.

Likewise, on the international front, the United States government adopted a series of economic measures that marked a significant shift in trade and fiscal policy. Specifically, on April 2, 2025, President Trump announced that the United States would impose a 10% tariff on all countries, effective as of April 5, 2025, as well as a higher, customized reciprocal tariff for those countries with which the United States maintains the largest trade deficits. Although certain energy products have been excluded, the impact of these measures on economic growth and global trade remains uncertain and could disrupt international trade flows and increase operating costs for companies dependent on global supply chains.

To reduce exchange rate instability and financial market volatility ahead of the legislative elections on October 26, 2025, the Argentine Government entered into a financial assistance agreement with the United States. This agreement included a currency swap mechanism for US$20,000million and intervention by the U.S. Treasury through the direct purchase of pesos in the local market. These measures aimed to strengthen international reserves and provide market certainty in a context of heightened pre-electoral uncertainty.

In this context, the national legislative elections were held on October 26, defining the new composition of the National Congress and potentially having significant implications for the country’s economic and regulatory direction. The government has clearly expressed its intention to move forward with structural reforms aimed at fiscal consolidation, reducing inflation, and economic deregulation; however, uncertainty persists regarding legislative support for their implementation. The absence of legislative consensus could limit the scope of the proposed reforms, influence market expectations, and affect macroeconomic stability.

On December 10, 2025, the Ministry of Economy carried out the auction of the National Treasury Bond in U.S. dollars with a fixed rate of 6.50% and maturity on November 30, 2029(BONAR 2029N), awarding US$ 1,000 million out of total bids of US$ 1,420 million. The cut-off price implied an annual yield of 9.26%, with full amortization at maturity. According to official information, the funds obtained will be used to partially cover the scheduled amortizations for January 2026, avoiding the use of the Central Bank’s reserves.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
On December 27, 2025, the National Congress simultaneously enacted the 2026 Budget Law and the so-called “Fiscal Innocence Law,” which establishes the presumption of innocence for taxpayers, updates the thresholds for classifying tax offenses, shortens statute of limitations periods, and enables voluntary regularization mechanisms. These provisions provide greater legal and fiscal certainty, fostering transparency and compliance within the framework of corporate governance.

Likewise, the Company's management permanently monitors the evolution of the variables that affect its business, to define its course of action and identify the potential impacts on its equity and financial situation. The reforms proposed by the new government began their legislative discussion process. It is not possible to predict at this time its evolution or new measures that could be announced. Likewise, the Company cannot guarantee that the aforementioned macroeconomic difficulties or the adoption of new measures by the Argentine Government to control inflation may affect its operations and financial situation.

The Company's financial statements must be read in light of these circumstances.

2.
CONSOLIDATED FINANCIAL STATEMENTS

tgs presents its consolidated financial statements including Telcosur S.A. (“Telcosur”), its consolidated subsidiary, which are jointly referred to as “tgs” or “the Company”.

These Consolidated Financial Statements were approved and authorized for issuance by the Company's Board of Directors on April 22, 2026.

3.
BASIS OF PRESENTATION

These consolidated financial statements have been prepared in accordance with IFRS Accounting Standards as issued by the International Accounting Standards Board (“IFRS Accounting Standards”).

The CNV, in Title IV, Chapter III, Article 1 of the Rules has provided that listed companies must submit their consolidated financial statements by applying Technical Resolution No. 26 amended by Resolution N° 29 of the Argentine Federation of Professional Councils of Economic Sciences ("FACPCE"), which adopts the IFRS Accounting Standards issued by the IASB, its amendments and circulars for the adoption of IFRS Accounting Standards that the FACPCE dictates in accordance with the provisions of that Technical Resolution.
The preparation of the consolidated financial statements in conformity with IFRS Accounting Standards requires management to make accounting estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting fiscal year. Estimates are used when accounting for the impairment of financial assets, income taxes, provisions for legal claims and others, depreciations and recoverable value of assets. Actual results could be significantly different from such estimates.

The presentation in the statement of financial position distinguishes between current and non-current assets and liabilities. The assets and liabilities are those expected to be realized or settled within twelve months after the end of the reporting period under review, and those held for sale. The fiscal year begins on January 1 and ends on December 31 of each year. The economic and financial results are presented on a fiscal year basis.

The consolidated financial statements have been stated in thousands of Argentine pesos (“Ps.”) which is the functional currency of the Company and its subsidiary, unless otherwise stated, and restated to reflect the effects of inflation as indicated in Note 4.d).

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
4.
SIGNIFICANT ACCOUNTING POLICIES
4.a) New IFRS accounting standards
4.a 1) New standards and interpretations issued by the IASB effective for the years beginning on or after January 1, 2025 adopted by the Company
The new accounting standards, amendments and interpretations issued by the IASB that became effective as of January 1, 2025 and that have not had an impact on the Company’s Consolidated Financial Statements are the following:


Amendments to IAS 21– The effects of changes in foreign exchange rates - Lack of exchangeability


On August 15, 2023, the IASB issued the modification to IAS 21 called “Lack of exchangeability” to provide guidelines in the latter case. The amendment requires entities to apply a consistent approach to evaluating whether a currency can be exchanged for another currency, and if not, determining the exchange rate to use for measurement purposes and the disclosures that need to be provided in its financial statements.

 

Once the absence of exchangeability between currencies has been identified, the exchange rate must be estimated that represents that which would be obtained in an orderly transaction between market participants and that reflects economic conditions. These modifications do not specify a methodology for estimating the exchange rate to be used, but rather it must be developed by each entity.

 
The application of this accounting standard did not have a significant impact on the Company´s Consolidated Financial Statements.

4.a.2) New IFRS Accounting standards issued that are not yet effective for the year beginning January 1, 2025.

The IFRS accounting standards that potentially have an impact on the Company, which are not yet effective and have not been adopted early in the year beginning January 1, 2025, are listed below.

On August 15, 2023, CNV General Resolution No. 972/2023 was published in the BO, which indicates that the early application of Accounting Standards IFRS and/or its modifications will not be admitted, unless the CNV specifically admits it.



IFRS 18 - Presentation and Disclosure in Financial Statements



This is the new standard on presentation and disclosure in financial statements, which replaces IAS 1, with a focus on updates to the statement of profit or loss.



The key new concepts introduced in IFRS 18 relate to:

•
the structure of the statement of profit or loss with defined subtotals;
•
requirement to determine the most useful structure summary for presenting expenses in the statement of profit or loss;
•
required disclosures in a single note within the financial statements for certain profit or loss performance measures that are reported outside an entity’s financial statements (that is, management-defined performance measures); and
•
enhanced principles on aggregation and disaggregation which apply to the primary financial statements and notes in general

The amendments are effective for annual reporting periods beginning on or after January 1, 2027. Early adoption is permitted. Requires retrospective application.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Currently, the Company presents a subtotal for operating profit. Management is conducting a detailed analysis to determine the appropriate classification of certain items, with the aim of ensuring that this operating profit subtotal complies with the requirements of IFRS 18. In this context, significant changes are expected, mainly as a result of the reclassification of financial results within operating activities. In addition, the new aggregation and disaggregation requirements set out in the standard will lead to modifications in the way the structured summary of information is presented, in order to more effectively reflect the Company’s performance.

Amendments to IFRS 9 and 7 - Classification and measurement of financial instruments

On 30 May 2024, the IASB issued targeted amendments to IFRS 9 Financial Instruments and IFRS 7 Financial Instruments: Disclosures to respond to recent questions arising in practice, and to include new requirements not only for financial institutions but also for corporate entities. These amendments: (i) clarify the date of recognition and derecognition of some financial assets and liabilities, with a new exception for some financial liabilities settled through an electronic cash transfer system; (ii) clarify and add further guidance for assessing whether a financial asset meets the solely payments of principal and interest (SPPI) criterion; (iii) add new disclosures for certain instruments with contractual terms that can change cash flows (such as some financial instruments with features linked to the achievement of environment, social and governance targets); and (iv) update the disclosures for equity instruments designated at fair value through other comprehensive income (FVOCI).

The amendments are effective for annual reporting periods beginning on or after January 1, 2026.

The Company does not expect the amendments to have a material effect on its Financial Statements.

Improvements to IFRS – Volume 11 (Covering IFRS 1, 7, 9 and 10, and IAS 7).

In September 2024, the IASB issued Volume 11 of the Improvements to IFRS, which includes minor amendments and clarifications to IFRS 1, 7, 9 and 10, as well as IAS 7. These improvements aim to simplify practical application and enhance consistency in the interpretation of the requirements.

The amendments are effective for annual reporting periods beginning on or after January 1, 2026. Early adoption is permitted

The Company does not expect the amendments to have a material impact on its Financial Statements.
4.b) Consolidation

4.b.1) Subsidiaries
Subsidiaries are all entities over which the Company has control. The Company controls an entity when the Company is exposed to, or has rights to, variable returns from its involvement and has the ability to affect those returns through its power over the entity. Subsidiaries are fully consolidated from the date on which control is transferred to the group. They are deconsolidated from the date that control ceases. For this purpose and unless there are specific requirements, it is generally considered that tgs has control, when it has a participation greater than 50% of the available voting rights.
The accounting policies of the subsidiaries are consistent with the accounting policies adopted by the Company.
Inter-company transactions, balances and profit or loss from transactions between group companies are eliminated. Unrealized profit or loss are also eliminated.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Detailed data reflecting subsidiary control as of December 31, 2025 and 2024 is as follows:

      
% of shareholding and
voting
       
Company
Incorporation
country
Direct  
Indirect
 
Closing date
Main activity 
                            
TelcosurArgentina
  99.98%  - December 31Telecommunication services

For consolidation purposes for the year ended December 31, 2025 and 2024, the financial statements of Telcosur have been used at those dates.

The subsidiary CTG (Liquidated) was dissolved on December 31, 2024, having conducted no operations during the 2024 fiscal year.

Detailed data reflecting subsidiary control as of December 31, 2023 is as follows:
      
% of shareholding and
voting
      
Company
Incorporation
country
 Direct
  
Indirect
 
Closing date
Main activity
                         
TelcosurArgentina  99.98%  - December 31Telecommunication services
CTGArgentina  100%  - 
December 31
Electricity related services
4.b.2) Associates
Associates are entities over which the group has significant influence but not control, generally accompanying a shareholding of between 20% and 50% of the voting rights. Investments in associates are accounted for using the equity method of accounting. Under the equity method, the investment is initially recognized at cost, and the carrying amount is increased or decreased to recognize the investor’s share of the profit or loss of the investee after the date of acquisition.
The Company accounted for the investments in its associates, under the equity method  on the basis on the financial statements as of December 31, 2025, of Gas Link S.A. (“Link”) and for the years ended as of December 31, 2024 and 2023, also used the financial statements of Transporte y Servicios de Gas en Uruguay S.A. (Liquidated) (“TGU”) as of September 30.

Accounting policies of associates have been changed where necessary to ensure consistency with the policies adopted by the Company.

Unrealized gains and losses resulting from transactions between tgs and the associate or joint venture are eliminated to the extent of the interest in the associate or joint venture.

In the table below, associate is disclosed, together with the percentage of shareholding and voting as of December 31, 2025 and 2024:


 
% of
    
Company
Incorporation
country
 
shareholding
and voting
 
Closing date
Main activity
           
Link
Argentina
  49%December 31
Pipeline exploitation and construction

For the year ended December 31, 2023, the Company additionally considered its 49% interest in TGU, company that was liquidated as of December 26, 2024.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
4.b.3) Joint arrangement
As indicated in “Note 23 – Associates and Joint Arrangement”, on August 7, 2017, the Company proceeded to create a UT (similar to a joint operation) with SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A. (“SACDE”) (“UT”). This operation is evaluated as a joint agreement under the provisions included “IFRS 11 - Joint Arrangements” since the parties have joint control of the operation, meaning that the decisions of the relevant activities are taken under the unanimous consent of the parties.
The Company has defined that the UT constitutes a joint operation given that it grants its participants a percentage of the rights over the assets and liabilities arising from each contract. Accordingly, the Company recognizes its share in the jointly operated assets, liabilities, revenues, costs and expenses.
Accounting policies applicable to the UT have been modified and adapted, if applicable, to ensure consistency with the policies adopted by the Company. For further information regarding the UT, see Note 23.

4.c) Foreign currency translation

4.c.1) Functional and presentation currency

The Consolidated Financial Statements are presented in thousands of Argentine Pesos, which is the Company’s functional currency restated to reflect the effects of inflation as indicated in Note 4.d). Each subsidiary or associate determines its own functional currency based on the currency of the primary economic environment in which these entities operate.
4.c.2) Transactions and balances

Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions, and from the translation of monetary assets and liabilities denominated in foreign currencies at reporting date exchange rates, are recorded in the Statement of Comprehensive Income within financial income and financial expenses, as appropriate.
4.c.3) Associates

The functional currency of the associate company TGU was the US dollar, because it was the currency in which it substantially generated its income and incurred its expenses. Assets and liabilities were converted into Argentine pesos using the exchange rate prevailing at the end of each year, their common stock and retained earnings at their historical exchange rates and results at average exchange rates.

On December 26, 2024, said company was liquidated, so no balances were recorded for it as of December 31, 2024.

4.d) Restatement to current currency - Comparative Information

4.d.1) Regulatory framework

The Consolidated Financial Statements as of December 31, 2025, including comparative figures, have been restated to take into account changes in the general purchasing power of the Company’s functional currency (the Argentine peso) in accordance with IAS 29 “Financial Reporting in hyperinflationary economies” (“IAS 29”) and CNV General Resolution No. 777/2018. As a result, the Financial Statements are stated in terms of the current unit of measurement at the 2025 balance sheet date.
IAS 29 requires that the financial statements of an entity that reports in the currency of a hyperinflationary economy, regardless of whether they are based on the historical cost method or the current cost method, are expressed in terms of the current unit of measurement at the closing date of the reporting period. In order to conclude on the existence of a hyperinflationary economy, the standard details a series of factors to be considered, among which is a cumulative inflation rate over three years that approaches or exceeds 100%.
The accumulated inflation over the last three years is above 100%.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
To evaluate the aforementioned quantitative condition, and also to restate the financial statements, the CNV has established that the series of indexes to be used for the application of IAS 29 is determined by the FACPCE. This series of indexes combines the National Consumer Price Index (“CPI”) as of January 2017 (base month: December 2016) with the Domestic Wholesale Price Index (“WPI”), both published by the Institute National Statistics and Census (“INDEC”) until that date. For the months of November and December 2015, for which there is no information from the INDEC on the evolution of the WPI, the variation in the CPI of the Autonomous City of Buenos Aires was applied.
Considering the aforementioned index, inflation was 31.55%,117.8% and 211.4% in the years ended December 31, 2025 2024 and 2023 respectively.

4.d.2) Restatement mechanism

The financial statements must be adjusted to consider changes in the general purchasing power of the currency, so that they are expressed in the current unit of measurement at the end of the reporting period. Said requirements also include all the comparative information of the financial statements, without modifying the decisions made based on the financial information corresponding to those financial years.
The figures as of December 31, 2024 and 2023, which are presented in these Consolidated Financial Statements for comparative purposes, arise from the restatement to the current unit of measure of the Financial Statements as of said dates, in accordance with IAS 29.
Restatement of the balance sheet

i.
Monetary items (those with a fixed nominal value in local currency) are not restated, since they are already expressed in the current unit of measurement at the closing date of the reporting period. In an inflationary period, maintaining monetary assets generates loss of purchasing power and maintaining monetary liabilities generates a gain in purchasing power, provided that such items are not subject to an adjustment mechanism that compensates to some extent for these effects. The monetary loss or gain is included in the result of the period in which it is reported.
ii.
The non-monetary items measured at their current values at the end of the reporting period are not restated for the purpose of their presentation in the balance sheet, but the adjustment process must be completed to determine in terms of a homogeneous unit of measurement the results produced by the holding of these non-monetary items.

iii.
The non-monetary items measured at historical cost or at a fair value as of a date prior to the closing date of the reporting period are restated by coefficients that reflect the variation in the general price level from the date of acquisition or revaluation to the closing date, proceeding then to compare the restated amounts of those assets with the corresponding recoverable values.

iv.
The restatement of non-monetary assets in the terms of the current unit of measurement at the end of the reporting period without an equivalent adjustment for tax purposes, results in a temporary taxable difference and the recognition of a deferred tax liability whose counterparty is recognized in the result of the period. For the closing of the subsequent period, the deferred tax items are restated for inflation to re-determine the charge to the result of the next period.

v.
When the capitalization of costs for loans in non-monetary assets in accordance with IAS 23 is applicable, the portion of those costs that compensate the lender for the effects of inflation is not capitalized.


Restatement of the Comprehensive Income Statement

Revenues and expenses (including interest and foreign exchange differences) are restated from the date of their booking, except for those items of the result that reflect or include in their determination the consumption of assets measured in purchasing power of a date before the consumption booked, which are restated based on the date of origin of the asset to which the item is related (for example, depreciation and other consumption of assets valued at historical cost); and also those results that arise from comparing two measurements expressed in purchasing power currency of different dates, for which it is necessary to identify the amounts compared, restate them separately, and make the comparison, but with the amounts already restated.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The result of the exposure to the change in the purchasing power of the currency (monetary results) is presented in a separate line and reflects the effect of inflation on the monetary items.
Restatement of the statement of changes in equity

As of the transition date (January 1, 2016), the Company applied the following special rules:

i.
The components of the capital stock were restated from the dates they were contributed.
ii.
Reserved earnings were maintained at the date of transition at their nominal value (legal amount without restatement).
iii.
The restated unallocated results were determined by the difference between the net assets restated at the transition date and the rest of the initial equity components expressed as indicated in the preceding sections.
iv.
After the restatement at the transition date, all the components of the equity are restated by applying the general price index from the beginning of the period, and each variation of those components is restated from the date of contribution or from the moment in which is added by any other means.
Restatement of the statement of cash flows

IAS 29 requires that all items in this statement should be restated in terms of the current unit of measurement as of the closing date of the period for which it is reported.
The monetary result generated by cash and cash equivalents is presented in the Statement of Cash Flows separately from cash flows from operating, investing and financing activities, as a specific item of the reconciliation between cash and cash equivalents at the beginning and at the end of the year.

4.e) Financial instruments

4.e.1) Financial assets

Recognition and initial measurement

Financial assets are classified, at the time of initial recognition, as:
 i.
Financial assets subsequently measured at amortized cost; and
 ii.
Financial assets subsequently measured at fair value (either with changes in other comprehensive income or with changes in results).
The classification of financial assets at initial recognition depends on the financial asset’s contractual cash flow characteristics and the Company’s business model for managing them. For additional information, see Note 16.2.1.
Subsequent measurement

After initial recognition, financial assets are measured according to their initial classification according to the following categories:

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Financial assets measured at amortized cost

Financial assets are classified and measure at amortized cost if both of the following conditions are met:

•
The financial asset is held within a business model with the objective to hold financial assets in order to collect contractual cash flows; and
•
The contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding.
Financial assets measured at amortized cost are subsequently measured using the effective interest method.
Gains and losses are recognized in the Statement of Comprehensive Income under financial results when the asset is derecognized, modified or impaired.

Financial assets measured at fair value through OCI (Debt instruments)

Corresponds to financial assets that are maintained in a business model whose objective is achieved by obtaining contractual cash flows and selling them.
Unrealized gains or losses arising from changes in fair value are recognized as other comprehensive income, except for the accrual of interest, exchange rate difference and the impairment of such assets that are recognized as financial results in the Statement of Comprehensive Income. At the time the asset is written off, the accumulated gain or loss is recognized as a financial result and it is eliminated from the respective reserve.
As of December 31, 2025 and 2024, the Company has not recognized any financial assets under this category.
Financial assets designated at fair value through OCI (equity instruments)

Upon initial recognition, the Company can elect to classify irrevocably its equity investments as equity instruments designated at fair value through OCI when they meet the definition of equity under IAS 32.
Gains and losses on these financial assets are never recycled to profit or loss. Dividends are recognized as other income in the Statement of Comprehensive Income when the right of payment has been established, except when the Company benefits from such proceeds as a recovery of part of the cost of the financial asset, in which case, such gains are recorded in OCI. Equity instruments designated at fair value through OCI are not subject to impairment assessment.
As of December 31, 2025 and 2024, the Company has not recognized any financial assets under this category.
Financial assets measured at fair value through profit or loss

In the event that financial assets are not classified according to the aforementioned categories, they will be subsequently measured at fair value, presenting gains or losses arising from changes in fair value in the income statement within financial results in the year in which they are originated.
Impairment of financial assets

The Company applies the Expected Credit loss (“ECL”) model for those financial assets accounted for at amortized cost or at fair value through OCI. The ECL is based on the difference between the contractual cash flows due in accordance with the contract and the cash flows that the Company expects to receive, discounted at an approximation of the original effective interest rate. To this end, the Company evaluates various factors, including credit risk, historical trends and other available information.

F - 20
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The application of this model implies recognition of:

•
Expected credit losses within of 12 months: these are expected credit losses that result from possible default events within 12 months after the filing date; and

•
Expected credit losses during the life of the asset: these are expected credit losses that result from possible events of default during the expected life of a financial instrument.
In case a loss allowance is recognized, the carrying amount of the asset is reduced through an impairment account and the amount of the loss is presented in the Statement of Comprehensive Income at the time it occurs. Subsequent recoveries of amounts previously written off are credited in the same line item.
The impairment tests performed on accounts receivable are described in Note 4.h).

4.e.2) Financial liabilities

Includes trade payables, loans, other payables and certain payroll and social security taxes payable.
Recognition and initial measurement

Financial liabilities are classified, at initial recognition, as subsequently measured at amortized cost or at fair value through profit or loss, as appropriate.
All financial liabilities are initially recognized at fair value net of transaction costs.
They are classified in current liabilities, except those whose maturity exceeds twelve months, which are classified as non-current liabilities.
Subsequent measurement

Financial liabilities measured at fair value through profit or loss
Includes financial liabilities held for trading. As of December 31, 2025 and 2024, there are no instruments classified in this category.
Financial liabilities measured at amortized cost
The Company includes financial liabilities with fixed or determinable payments that are not quoted in an active market. Current liabilities are included, except those whose maturity exceeds twelve months including premiums, discounts and direct expenses, which are included as non-current liabilities. They are measured using the effective interest method. As of December 31, 2025 and 2024, all of the Company’s financial liabilities were classified in this category.
Offsetting of financial instruments
Financial assets and liabilities are offset when there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis, or realize the asset and settle the liability simultaneously.


4.f) Derivative financial instruments

Derivative financial instruments are recognized at their fair value at inception and subsequently measured at their fair value and disclosed as assets or liabilities depending if it is gain or loss. The results of derivative financial instruments are classified under “Financial income / expenses” in the Statement of Comprehensive Income, or in the other comprehensive income if hedge accounting is applied.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Derivative financial instruments are measured in accordance with IFRS 13 “Fair value measurement”.

The method of recognizing the resulting gain or loss depends on whether the derivative is designated as a hedging instrument or not and, according to the nature of the item being hedged.


4.g) Inventories

Inventories consist of natural gas (in excess of the “Line Pack” classified as property, plant and equipment) in the Company’s pipeline system, and the liquids stored obtained from natural gas processing at the Cerri Complex.

Inventories are measured at the lower of cost restated for the inflation effects as mentioned in Note 4.d. or net realizable value. Cost is determined using the weighted average cost method. The cost of inventories includes expenditure incurred in purchasing and production and other necessary costs to bring them to their existing location and condition.
The net realizable value is the estimated selling price in the ordinary course of business less the estimated cost of completion and the estimated costs to make the sale.
The assessment of the recoverable value of these assets is made at each reporting date, and the resulting loss is recognized in the statement of comprehensive income when the inventories are overstated.



4.h) Trade receivables, contract assets and other receivables

Trade receivables are amounts due from customers for goods and services performed in the ordinary course of business. Contract assets are unbilled amounts due to customers related to works in progress.
Trade receivables, contract assets and other receivables are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method, less allowance for trade receivables.
The Company applies the simplified approach to measuring expected credit losses for trade receivables, contract assets and other receivables. For this purpose, customers have been grouped based on shared credit risk characteristics, the existence of guarantees, historical credit losses experienced and the existence of judicial proceedings aimed at obtaining payment. Once each group was defined, an expected uncollectibility rate calculated based on historic default rates adjusted to future economic conditions was defined.
If an impairment loss is recognized, the book amount of the asset is reduced through a provision account and the amount of the loss is recognized in the Statement of Comprehensive Income at the time it occurs. If in subsequent periods the amount of the impairment loss decreases, the reverse of the same is also recorded in the Statement of Comprehensive Income.


4.i) Cash and cash equivalents

Cash and cash equivalents include cash in hand, deposits with banking institutions and other short-term, highly liquid investments with original maturities not exceeding three months and without being subject to a risk of a significant change of value.


4.j) Property, plant and equipment (“PPE”)

Assets transferred from the privatization of GdE: The value of these assets was determined based on the price paid for the acquisition of 70% of the Company’s common stock, which amounted to U.S.$ 561.2million. This price was the basis to determine a total value of common stock of U.S.$ 801.7 million, which, when added to the debt assumed under the Company’s privatization agreement (the “Transfer Agreement”) of U.S.$ 395 million, resulted in a total value for PPE of U.S.$ 1,196.7 million. Such value, converted at the exchange rate in effect as of the date of the Transfer Agreement, has been restated for the effects of inflation as mentioned in Note 4.d, and less accumulated depreciation.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Line pack: It represents the natural gas in the transportation system that is necessary to keep the system at operating capacity, valued at acquisition cost and restated for the effects of inflation as mentioned in Note 4.d) and net of accumulated depreciation.

Materials: Materials are recognized at historical cost restated in accordance with Note 4.d). Consumption is restated based on the origin date of the acquisition of the asset.
Other items of PPE: have been valued at acquisition cost restated for the effects of inflation as mentioned in Note 4.d), and net of accumulated depreciation. They include, mainly, all the investments made to achieve system integrity and public safety equal to those required by international standards. Such investments included, among others, the costs of survey programs related to internal and external pipeline inspection, cathodic protection, pipeline replacement and recoating, and the facilities affected to the Liquids Production and Commercialization and Midstream segment.

PPE additions are recorded at acquisition or construction cost less accumulated depreciation and impairment losses (if applicable), except land, which is recorded at historical cost acquisition minus any impairment (if applicable), all this restated for the effects of inflation as mentioned in Note 4.d). The cost includes the cost of replacing significant components and the borrowing costs derived from loans that finance its construction to the extent that the requirements for recognition as assets are met.
Subsequent costs restated for the effects of inflation as mentioned in Note 4.d. are included in the carrying amount of the asset or recognized as a separate asset, as appropriate, only when it is probable that future economic benefits associated with the item will flow to the Company and the cost of the item can be reliably measured. The carrying amount of a replaced component is written off. In the same way, when a major maintenance is carried out, they are added to the cost of the equipment if the recognition criteria are satisfied, eliminating any remaining non-depreciated remaining value restated for the effects of inflation as mentioned in Note 4.d), if any, of previous overhaul.
In this sense, Resolutions No. 1660/2000 (“Resolution 1660”) and No. 1903/2000 (“Resolution 1903”) issued by ENARGAS include definitions about the costs that should be considered as improvements or maintenance expenses. All other repairs and maintenance are charged to the statement of comprehensive income when incurred.
In accordance with IAS 23, the Company capitalizes financial expense on long term construction projects, until the moment in which the asset is in conditions for its use. Capitalization of borrowing costs is carried out considering the provisions of IAS 29, recording as an expense in the Statement of Comprehensive Income the part of the borrowing costs that compensates for inflation during the same period. For the years ended December 31, 2025 and 2024, there have not been capitalized borrowing costs.
Depreciation related to natural gas transportation assets is computed under the straight-line method over the estimated useful lives of the specific assets, which are not exceeding the maximum useful lives established by ENARGAS through Resolutions 1660 and 1903.
For depreciation of all other PPE, the Company uses the straight-line method of depreciation based on the useful life assigned to each item.
Major maintenance costs are depreciated according to the estimated time until the next major maintenance planned. Regarding the capitalized financial costs, they are depreciated based on the remaining useful lives of those components of PPE that originated such capitalization.
The assets’ residual values and useful lives are reviewed, and adjusted if appropriate, at each reporting date. For further information, see Note 12.
The result generated by the disposal of PPE components is recognized in the year in which it is generated.

Impairment of non-financial assets: The Company’s management assesses at each reporting period whether there is an indication that an individual component or a group of PPE may be impaired.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
If any indication exists, the Company estimates the asset´s or the cash-generating unit (“CGU”) recoverable amount. An asset´s recoverable amount is the higher of the fair value less costs to sell that asset, and its value-in-use.
That amount is determined for and individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or groups of assets; in which case, the cash flows of the group of assets that form part of the CGU to which the belong are taken.
Where the carrying amount of an individual asset or CGU exceeds its recoverable amount, the individual asset or CGU, as the case may be, is considered impaired and is written down to its recoverable amount. Impairment losses are recognized in the consolidated statement of comprehensive income.
In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted. To such end, the Company makes estimates and assumptions of the economic conditions that will prevail throughout the useful life of the assets.
As a result of the factors mentioned above, actual cash flows and values could vary significantly from projected cash flows and the values derived from the discounting techniques used.
Impairment losses, if any, are recognized in the statement of comprehensive income.

A previously recognized impairment loss is reversed only if there has been a change in the assumptions used to determine the recoverable amount of the individual asset or CGU since the last time an impairment loss was recognized. The reversal is limited so that the carrying amount of the asset or CGU does not exceed its recoverable amount, nor exceed the carrying amount that would have been determined, net of applicable depreciation, if an impairment loss had not been recognized for that asset or CGU in prior periods. Such a reversal is recognized in the income statement on the same line item in which the respective impairment charge was previously recognized, unless the asset is carried at its revalued amount, in which case the reversal is treated similarly to a revaluation increase.

As of December 31, 2025 and 2024, the book value of PPE did not exceed its recoverable value.
Infrastructure used in the natural gas transportation service: for its measurement and disclosure, the Company has evaluated the application of Interpretation No. 12 “Service Concession Agreements” (IFRIC 12) that sets the guidelines for the accounting of private entities that provide public services through a service concession agreement or a contract of a similar nature.
Considering the current terms and conditions of the License, tgs concluded that the License is outside the scope of IFRIC 12, as it is considered in substance to provide for an indefinite term because the infrastructure will never revert to the grantor and due to the characteristics of renewal of the License that give a similar result to what which would result from having obtained a perpetual right to operate the infrastructure.
The evaluation carried out and the conclusions reached by tgs are consistent with those of other transportation and natural gas distribution companies in Argentina that are subject to the similar regulations and license agreements. The evaluation was carried out jointly, when the transportation and distribution companies adopted the IFRS Accounting Standards in Argentina in 2012, together with the FACPCE, the Buenos Aires Stock Exchange (Bolsas y Mercados Argentinos - “BYMA”) and the CNV, considering the contributions of ENARGAS with respect to the regulatory aspects of the License agreements. In this regard, the CNV issued General Resolution No. 613/2012, ratifying that IFRIC 12 does not apply to natural gas transportation and distribution licenses established under the regulatory framework described in Note 17.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

4.k) Leases

Leases are recognized as a right-of-use asset and a corresponding liability at the date on which the leased asset is available for use by the Company. Each lease payment is allocated between the liability and the finance cost. The finance cost is expensed over the lease term to produce a constant periodic interest rate on the remaining balance of the liability for each period. The right-of-use asset is depreciated over the shorter of the useful life of the asset or the term of the contract.
Assets and liabilities arising from a lease are initially measured based on the present value of the lease. Liabilities include the net present value of the following lease payments:

a) Fixed payments, less any incentive receivable;
b) Variable lease payments;
c) Amounts expected to be collected as a guarantee of the residual value;
d) The exercise price of the lease option; and
e) Penalty payments for termination of the lease.
Lease payments are discounted using the interest rate implicit in the lease. If such rate cannot be determined, the Company’s incremental borrowing rate is used, which is the rate that tgs would have to pay to borrow the funds necessary to obtain an asset of similar value in a similar economic environment.
Right-of-use assets are measured at cost which comprises the following:
a) The amount of the initial measurement of the lease liability;
b) Any lease payments made on or before the commencement date less any lease incentives received;
c) Any initial direct costs; and
d) Restoration costs
These assets, which are subject to the risk of impairment, are depreciated on a straight-line basis over the shorter of the useful life of the leased asset or the lease term.
Payments associated with short-term leases and low-value assets are recognized on a straight-line basis as an expense in the Statement of Income. Short-term leases are those with a term of 12 months or less. Low-value assets comprise computer equipment, vehicles, small items of office furniture and real estate.
The Company has rights to use assets that are shown as part of Property, plant and equipment (see Note 12). Lease liabilities are shown under Financial Debt (see Note 13). For further information regarding the expense related to short-term and low value leases and the interest expense on lease liabilities, see Note 8.j. and 8.k., respectively.

4.l) Loans

Loans have been initially recorded at fair value net of direct attributable transaction costs. Subsequently, loans are valued at their amortized cost. Liabilities are disclosed as non-current when their maturity exceeds twelve months.

4.m) Trade payables

Trade payables are initially recognized at fair value. Subsequently they are measured at amortized cost using the effective tax method.
4.n) Income tax and deferred income tax

Income tax

Income tax includes current tax and deferred income tax. Income tax is presented in the Statement of Comprehensive Income.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The current income tax is calculated on the basis of tax regulations in force at each reporting period. Management periodically evaluates positions taken in tax returns with respect to situations in which tax regulations are subject to interpretation and establishes provisions if applicable. As of December 31, 2025, 2024, and 2023, there are no provisions booked for this concept.

The Company has calculated income tax charges using the deferred tax method, which considers the effect of temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases.
Deferred income tax assets and liabilities are measured at undiscounted nominal value at the tax rates that are expected to apply in the year when the asset is realized or the liability is settled, based on tax rates and tax laws that have been enacted or substantively enacted at the reporting period date (See Note 14).

On December 29, 2017, the National Executive Branch promulgated Law No. 27,430 (the “Law 27630”) on Tax Reform. It has introduced several changes to the text of the Income Tax Law. Law 27630 establishes a new treatment with the application of the following scale, updated for the years beginning on January 1, 2023, maintaining the 7% rate on dividends.


Accumulated taxable net profit
 

   

 
More than $
 
to $
 Will pay $  
More than %
 
On the surplus of $
 
 
$
0
  
$
101,679,575
  
$
0
   
25
%
 
$
0
 
 
$
101,679,575
  
$
1,016,795,753
  
$
25,419,894
   
30
%
 
$
101,679,575
 
 
$
1,016,795,753
 
On forward
  
$
299,954,747
   
35
%
 
$
1,016,795,753
 

A deferred tax is recognized on the temporary differences arising from investments in subsidiaries and associates, except for deferred tax liabilities where the Company is able to control the timing of the reversal of the temporary difference and it is probable that the reversal will not occur in the foreseeable future.
Deferred tax assets and liabilities are offset if the Company has a legally enforceable right to offset recognized amounts and when deferred tax assets and liabilities relate to income tax levied by the same tax authority on the same taxable entity or different taxable entities that intend to settle tax assets and liabilities on a net basis. Deferred tax assets are recognized to the extent that it is probable that future taxable income will be generated against which the temporary differences can be used.
The assets and liabilities generated by the application of the deferred tax were valued at their nominal amount considering the restatements for inflation mentioned in Note 4.d) and are classified as non-current assets or liabilities.
4.o) Provisions

The Company has recorded provisions related to legal actions, judicial court, claims and administrative proceedings, including interpretive questions of the current legislation and those of regulatory nature.
Provisions for legal claims and/or claims by third parties (“legal claims and others”) are recorded at the expected cancellation value when the Company has a present obligation as a result of a past event, it is probable that an outflow of resources will be required to settle the obligation; and the amount has been reliably estimated. Estimates are reviewed and adjusted, as the Company obtains additional information to be received.
4.p) Revenue recognition from contract with customers

Revenue is measured at the fair value of the consideration received or to be received, and represents amounts receivable for goods and/or services supplied. Revenue is recognized when the control of goods or services is transferred to the customer and the consideration is determined by an amount that reflects the consideration that the Company expects to receive and when the specific criteria for each of the Company’s activities, as described below, are met.
Tax on exports and turnover tax are disclosed as Selling Expenses.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The following are the accounting policies of the Company for the recognition of revenue of each of the business segments defined by our management:

Natural Gas Transportation
Natural Gas transportation services includes: (i) firm natural gas transportation, whose revenues are recognized when the capacity is reserved and paid for regardless of actual usage by the customer, (ii) interruptible natural gas transportation and exchange and displacement services whose revenues are recognized when services are rendered and (iii) the operation and maintenance service of the assets affected by the natural gas transportation service corresponding to the expansions promoted by the National Government and whose ownership corresponds to the trusts created for such purpose whose revenues are recognized when services are rendered.
The applicable rates arise from the tariff tables published by ENARGAS. Thus Company’s revenues are recognized by the amount for which it will be entitled to receive as consideration.
At the end of each month, tgs recognizes, over the time, its revenues from sales equivalent to the firm reserved capacity, the volumes of natural gas transported under the modalities of interruptible and exchange and displacement and by the operation and maintenance services. In return, a trade receivable is recognized which represents an unconditional right that the Company has to receive the consideration owed by the customer. On the other hand, the billing of the service is done monthly and according to the guidelines established by ENARGAS, the consideration is received within said calendar month.
Liquids Production and Commercialization
This business segment includes: (i) production and commercialization of liquids, and (ii) other liquid services.
Liquids Production and Commercialization in the domestic market
In the domestic market, sales prices per ton are determined in accordance with the provisions set forth in Note 17.b) - Regulatory Framework - Regulatory framework for non-regulated segments - to these Consolidated Financial Statements.
Regarding ethane sales, they are made to PBB Polisur S.R.L. (“PBB”), the only customer to whom this product is sold. To estimate transaction price, the Company uses the most probable amount method. In this regard, the Company only recognizes those transactions where it is highly probable that they will not be reversed in the future.
Liquids Production and Commercialization in the foreign market
In the foreign market, the Company markets propane, butane and natural gasoline to international traders (“traders”) and other clients of worldwide renown, some of them through trucks.
These sales are made under short-term contracts (less than one year), with the price determined as reference to international prices plus / minus a fixed amount per ton sold.
For both domestic and foreign market sales, tgs transfers control and recognizes revenues when the products are delivered to the customer and therefore the product has been accepted and there is no evidence of the existence of pending obligations by the Company. It is at that moment when a trade receivable is recognized given that the receipt of the consideration is unconditional and only the passage of time is the only requirement for receiving the consideration owed by the customer.

Other liquids services
The Liquids production and commercialization segment also comprises reception, storage and dispatch of the liquids from the facilities located in Puerto Galván.
Revenues are recognized when the service is effectively rendered, that is, after the dispatch to each vessel. The price is agreed by the parties being a fixed amount per ton of product dispatched, there being no variable components in them. These services are billed monthly, at which time an unconditional right to receive the consideration from the client arises.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Midstream
The services included in the Midstream segment consist mainly in (i) treatment, removal of impurities and natural gas compression, including the collection and transport of natural gas (ii) inspection and maintenance of pipelines and compressor plants, (iii) services of steam generation for electricity production and management services for expansion works and steam generation for the production of electricity and (iv) natural gas transportation services in Vaca Muerta.
Revenues from sales of this business segment are recognized over the time in the period in which the service is provided. The sale price is determined according to what arises from the contractual conditions agreed between tgs and its customers. In all cases, the recognition and billing of sales income is made on a monthly basis so that at that time a sales credit is recorded.
Revenues from the participation in the joint venture, which correspond to the construction activities provided by the joint venture, are recognized based on the stage of completion of the contractual activity (percentage of completion method), considering the estimated final margin of the work. To apply the percentage of completion method, the revenue recognized at the end of the period will correspond to the total contractual revenue multiplied by the actual percentage of completion, based on the proportion of the total direct contractual costs incurred to date, and the total direct contractual costs, including the estimated costs to complete the construction. Costs incurred in excess of the costs associated with revenue are recognized in Contract assets.
Telecommunications
Revenues from the provision of Telecommunications services are recognized in the statement of comprehensive income at the time of effective performance of the service. The sale price is determined according to what arises from the contractual conditions agreed between Telcosur and its customers. The consideration is determined as a fixed monthly amount. In all cases, the recognition and billing of sales income is made on a monthly basis so that at that time a sales receivable is recorded.
Financial components
The Company does not have any contracts where the period between the transfer of the promised goods or services to the customer and payment by the customer exceeds one year. As a consequence, the Company does not adjust any of the transaction prices for the time value of money.
4.q) Government grants


As part of its participation in propane and butane supply programs in the local market carried out by the National Government, (for more information see “Note 17 - Regulatory Framework - b) Regulatory framework for non-regulated segments”), the Company receives from the Secretary of Energy a series of subsidies that are recognized in accordance with the provisions of IAS 20 “Accounting for government grants and disclosures of government assistance” because they correspond to economic compensations calculated as the difference between the sale prices of the products determined in accordance with the legislation in force and the reference prices calculated by the Secretary of Energy.

 

Government grants are recognized at fair value whenever there is reasonable assurance that will be received and that the product has been delivered. They are presented within the caption “Revenues” of the Statement of Comprehensive Income.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
4.r) Contract liabilities

Mainly consist of pre-payments for services made by customers in order to finance the works to render the service. Contract liabilities are recognized initially at their fair value. Subsequent to initial recognition, advances from customers are measured at their amortized cost based on the projections of the services to be provided that cancel the advances, restated for the inflation effects as mentioned in Note 4.d).
4.s) Equity accounts

The activity in the Equity accounts reflects resolutions adopted by Shareholders in their meetings, or the effects of the laws or regulations in force. The equity accounts are restated for the inflation effects according to what is mentioned in Note 4.d), except the account Capital stock which is maintained at its original value.
Common stock and adjustment to common stock

The common stock consists of contributions made by shareholders represented by shares and comprises outstanding shares at their face value, net of treasury shares mentioned below.
Common stock accounts were restated in current currency as mentioned in Note 4.d). Common stock account was kept at original value and the adjustment arising from such restatement is shown under “Inflation Adjustment to common stock”.
Common stock adjustment is not distributable in cash or in kind but may be capitalized through issuance of shares. In addition, this balance may be used to compensate accumulated losses.
Treasury shares and adjustments to treasury shares

Corresponds to the reclassification of the nominal value and corresponding restatement in constant peso (Inflation Adjustment to Common Stock) of shares issued and repurchased by the Company in market transactions, as required by the current regulations of the CNV.
Own equity instruments that are reacquired (treasury shares) are recognized at cost restated for the inflation effects as mentioned in Note 4.d) and deducted from equity. No gain or loss is recognized on the purchase, sale or cancellation of the Company’s treasury shares. Any difference between the carrying amount and the consideration, if reissued, is recognized as a premium on common stock or additional paid-up capital.
Additional paid-up capital
Corresponds to the difference between the carrying value of the treasury shares and the quoted value at the time were distributed (for more information see Note 19.b). It is restated according to what is mentioned in Note 4.d).

Legal Reserve

Pursuant to the provisions of the Argentine Business Association Law and the CNV, the Company is required to set up a legal reserve by providing at least 5% of the aggregate amount of net income for the year, prior year adjustments, transfers of other comprehensive income to retained earnings and accumulated losses of prior years, when this aggregate amount exceeds zero until the legal reserve equals 20% of the sum of Capital stock and Adjustment to capital stock balances.
Distribution of dividends

The cash dividend is recognized as a liability in the Company’s financial statements in the year in which they are approved by the shareholders of the Company or the Board of Directors according to the powers delegated by the Shareholders’ Meeting, as appropriate.
Retained earnings

The outstanding balance of retained earnings includes accumulated gains or losses which were not allocated to a specific purpose reserve and, when positive, may be distributed pursuant to the decision of the Shareholders provided these retained earnings are not subject to legal restrictions, as mentioned above “Legal reserve”.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
4.t) Basic and diluted earnings per share

Earnings per share as of December 31, 2025, 2024 and 2023 were calculated as follows:
  
2025
  
2024
  
2023
 
Net income attributable to owners of the Company
  
420,859,657
   
486,945,767
   
67,369,367
 
Weighted average number of outstanding shares (1)
  
752,761,058
   
752,761,058
   
752,761,058
 
Basic and diluited earnings per share
  
559.09
   
646.88
   
89.50
 
(1)
As of December 31, 2024 and 2023, the weighted average number of shares excludes treasury shares.
As of December 31, 2025, 2024 and 2023, there are no tgs instruments outstanding that imply the existence of potential ordinary shares, thus the basic net income per share for the years ended on December 31, 2025, 2024 and 2023 matches the diluted net income per share.

5.
CRITICAL ACCOUNTING ESTIMATES

The preparation of financial statements in conformity with professional accounting standards requires the Company to make accounting estimates that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The making of such estimates involves tgs using assumptions and presumptions that are based on a number of factors, including past trends, events known at the date of issuance of these financial statements, and expectations of future events and their outcomes.

5.a) Impairment of PPE

As mentioned in Note 4.j), management periodically evaluates the existence of significant events or changes that could have an adverse effect on the Company or will take place in the near future that could affect the recoverable amount of PPE. These evaluations are performed at the lowest level for which identifiable cash flows exist, i.e., for each CGU. The Management considers each business segment as a CGU.

When assessing whether an impairment indicator may exist, tgs evaluates both internal and external sources of information, such as the following:

  •
Whether significant decreases in the market values of PPE elements took place.

•
Whether prices of the main products and services that are marketed decreased.

•
Whether significant changes in the regulatory framework were introduced.

•
Whether operating costs suffered a materially increase.

•
Whether evidence of obsolescence or physical damage has occurred.

•
Whether the macroeconomic situation in which tgs carries out its activities, including significant variations in the sale prices of products, raw materials, interest rates, etc, has worsen.

If any indication of impairment exists, the Company estimates the recoverable amount of the CGU.



The recoverable amount of a CGU is the higher of: (i) its fair value less costs of disposal; and (ii) its value in use. When the carrying amount of a CGU exceeds its recoverable amount, the CGU is considered impaired and is written down to its recoverable amount. Consequently, unless otherwise indicated, the recoverable amount used in the impairment assessment is the value in use.



The value in use is calculated based on discounted future cash flows. The projected cash flows are prepared taking into account significant assumptions relating to: discount rate, estimates of future tariff adjustments and the recognition of cost adjustments and expected macroeconomic variables such as inflation and foreign exchange rates. The discount rate is based on a weighted average cost of capital ("WACC").


F - 30
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

The value in use of PPE is sensitive to significant changes in the assumptions applied, and in particular, the natural gas transportation CGU has historically shown greater sensitivity to changes in economic and regulatory conditions.



As a result of the 675% tariff increase granted by ENARGAS effective April 1, 2024, and the subsequent monthly increases, as of December 31, 2024, the Company’s management recognized a reversal of previously recorded impairment in property, plant and equipment corresponding to this CGU in the amount of Ps. 52,126,669, within the “Gas pipelines,” “Compressor plants,” “Other industrial plants,” “Pressure regulation and/or measurement stations,” and “Other technical facilities” categories. The reversal was recognized under “Reversal of impairment of property, plant and equipment” in the Consolidated Statement of Comprehensive Income for the year then ended.



The projections used in calculating the recoverable amount of this CGU as of December 31, 2024, considered different weighted alternatives related to: (i) the status of the negotiations with the Argentine Government at that time, (ii) the contractual rights arising from the License, (iii) Management’s expectations regarding the transitional tariff increase to be granted until the new Five‑Year Tariff Review (“FYTR”) was completed, (iv) Management’s expectations regarding the outcome of the new FYTR process, and (v) the impact of a cost‑monitoring mechanism that would allow for semiannual adjustments to the applicable tariffs.



In April 2025, the FYTR process was completed, through which the Company obtained the tariff‑adjustment framework for the next five years, as well as the determination of other relevant variables for the execution of its natural gas transportation business (see Note 17).



The carrying amount of the natural gas transportation CGU as of December 31, 2025 amounts to Ps. 1,667,840,105. During the year, in order to assess the existence of impairment indicators, the Company analyzed a series of assumptions and judgments based on information from both internal and external sources, such as tariff increases and the recognition of cost adjustments, as well as the behavior of macroeconomic variables including discount rates and market rates.

As of December 31, 2025, the Company has not identified any indicators of impairment of its PPE.

5.b) Provisions for legal and other claims and contingent assets

The Company has recorded certain contingent liabilities related to legal, judicial or extrajudicial actions, claims and administrative proceedings, including those of a legal and regulatory nature. The Company records liabilities when their occurrence is probable and when a reliable estimate of their amount can be made. Provisions are based on events known to the Company at the date of issuance of its financial statements, their probability of occurrence, its estimates of the outcome of such matters and the experience of its legal advisors in contesting, litigating and settling other matters. To the extent that there are more elements of judgment that allow improving the evaluation of contingencies, there will be changes in the estimates of future charges, which could have an impact on the Company's future results and its economic and/or financial situation.
 
Contingent assets are assets of a possible nature, arising from past events, which existence will be confirmed only by the occurrence or non-occurrence of uncertain future events, which are not entirely within the control of the Company. They are not recognized, but information regarding the nature of material contingent assets is disclosed in the note when the inflow of related economic benefits is deemed probable.
 
If the realization of income is virtually certain, the asset is no longer considered contingent and should be recognized in the financial statements.

F - 31
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
6.
SUPPLEMENTAL CASH FLOW INFORMATION

For purposes of the consolidated statement of cash flows, the Company considers all highly liquid temporary investments with an original maturity of three months or less at the time of purchase to be cash equivalents. The Cash Flow Statement has been prepared using the indirect method, which requires a series of adjustments to reconcile net income for the period to net cash flows from operating activities.

F - 32
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Non-cash investing and financing activities for the years ended December 31, 2025, 2024 and 2023 are presented below:

  
2025
  
2024
  
2023
 
Unpaid acquisition of PPE
  
3,035,628
   
26,367,360
   
20,351,112
 
Principal payment of financial lease (1)
  
9,498,794
   
9,856,279
   
7,688,661
 
Income tax paid through the use of financial assets at fair value through profit or loss
  166,052,445   -   - 
(1)
 Cancelled through compensation with trade receivables with the creditor. See Note 13.

Note 13 to these Consolidated Financial Statements includes a reconciliation between the opening and closing balance of the financial liabilities arising from financing activities.

7.
CONSOLIDATED BUSINESS SEGMENT INFORMATION

IFRS 8 “Operating Segments” requires an entity to report financial and descriptive information about its reportable segments, which are operating segments or aggregations of operating segments that meet specified criteria. Operating segments are components of an entity about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company’s CODM is the Board of Directors.

The Company analyzes its businesses into four segments: (i) Natural Gas Transportation Services, subject to ENARGAS regulations, (ii) Liquids Production and Commercialization, (iii) Midstream and (iv) Telecommunications. These last three business segments are not regulated by ENARGAS. Liquids Production and Commercialization business segment is regulated by the SE.

Non-current assets are mostly located in the entity´s country of domicile.

Detailed information on each business segment for the years ended December 31, 2025, 2024 and 2023 is disclosed below:

Year ended December 31, 2025
 
  Natural Gas  Liquids Production  
          
  
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Eliminations
  
Total
 
Revenues
  
705,124,167
   
660,572,878
   
347,314,231
   
7,614,806
   
-
   
1,720,626,082
 
Intersegment revenues
  
30,424,945
   
-
   
-
   
-
   
(30,424,945
)
  
-
 
Cost of sales
  
(312,106,562
)
  
(360,167,982
)
  
(139,266,626
)
  
(6,271,685
)
  
30,424,945
   
(787,387,910
)
Administrative expenses
  
(43,025,533
)
  
(11,489,874
)
  
(12,121,275
)
  
(553,266
)
  
-
   
(67,189,948
)
Selling expenses
  
(48,294,065
)
  
(36,359,551
)
  
(29,484,856
)
  
(1,120,819
)
  
-
   
(115,259,291
)
Other operating results
  
(10,440,683
)
  
(35,560,496
)
  
(1,267,307
)
  
(39,253
)
  
-
   
(47,307,739
)
Operating profit / (loss)
  
321,682,269
   
216,994,975
   
165,174,167
   
(370,217
)
  
-
   
703,481,194
 
Depreciation of property, plant and equipment
  
(123,134,046
)
  
(14,168,917
)
  
(64,658,390
)
  
-
   
-
   
(201,961,353
)

  Natural Gas  
Liquids Production
  
       

 
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Identifiable assets
  
2,674,532,463
   
745,043,455
   
1,942,766,479
   
51,867,684
   
5,414,210,081
 
Identifiable liabilities
  
960,872,860
   
139,994,030
   
1,147,810,407
   
37,667,312
   
2,286,344,609
 

F - 33
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Year ended December 31, 2024
 
  Natural Gas  Liquids Production  
          

 
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Eliminations
  
Total
 
Revenues
  
580,295,884
   
732,282,558
   
283,797,245
   
8,211,745
   
-
   
1,604,587,432
 
Intersegment revenues
  
16,082,261
   
-
   
-
   
-
   
(16,082,261
)
  
-
 
Cost of sales
  
(281,657,696
)
  
(381,988,055
)
  
(102,737,889
)
  
(6,419,891
)
  
16,082,261
   
(756,721,270
)
Administrative expenses
  
(42,704,427
)
  
(11,144,968
)
  
(7,979,401
)
  
(561,732
)
  
-
   
(62,390,528
)
Selling expenses
  
(34,911,789
)
  
(44,601,945
)
  
(20,963,654
)
  
(1,130,583
)
  
-
   
(101,607,971
)
Other operating results
  
771,948
   
(989,362
)
  
1,290,070
   
(19
)
  
-
   
1,072,637
 
Reversal of impairment of PPE
  52,126,669   -   -   -   -   52,126,669 
Operating profit
  
290,002,850
   
293,558,228
   
153,406,371
   
99,520
   
-
   
737,066,969
 
Depreciation of property, plant and equipment
  
(112,449,160
)
  
(13,283,987
)
  
(44,840,889
)
  
-
   
-
   
(170,574,036
)

  
Natural Gas
  
Liquids production
  
       

 
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Identifiable assets
  
2,208,170,669
   
674,941,898
   
1,535,860,809
   
46,578,559
   
4,465,551,935
 
Identifiable liabilities
  
828,002,112
   
85,941,547
   
609,750,328
   
3,700,362
   
1,527,394,349
 

Year ended December 31, 2023
 
  
Natural Gas
  
Liquids Production
  
          

 
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Eliminations
  
Total
 
Revenues
  
283,750,792
   
760,316,478
   
245,256,395
   
7,816,529
   
-
   
1,297,140,194
 
Intersegment revenues
  
8,047,173
   
-
   
-
   
-
   
(8,047,173
)
  
-
 
Cost of sales
  
(260,017,017
)
  
(463,910,014
)
  
(93,403,413
)
  
(6,414,629
)
  
8,047,173
   
(815,697,900
)
Administrative expenses
  
(41,846,438
)
  
(9,181,141
)
  
(7,081,407
)
  
(459,586
)
  
-
   
(58,568,572
)
Selling expenses
  
(22,648,988
)
  
(41,320,046
)
  
(22,010,462
)
  
(1,168,693
)
  
-
   
(87,148,189
)
Other operating results
  
(2,329,965
)
  
(221,979
)
  
378,282
   
-
   
-
   
(2,173,662
)
Operating (loss) / profit
  
(35,044,443
)
  
245,683,298
   
123,139,395
   
(226,379
)
  
-
   
333,551,871
 
Depreciation of property, plant and equipment
  
(116,176,459
)
  
(12,899,226
)
  
(44,601,631
)
  
-
   
-
   
(173,677,316
)

  
Natural Gas
  
Liquids Production
  
       

 
Transportation
  
and Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Identifiable assets
  
1,899,999,170
   
954,644,926
   
1,440,021,111
   
76,197,020
   
4,370,862,227
 
Identifiable liabilities
  
932,709,283
   
67,220,379
   
856,674,772
   
63,045,696
   
1,919,650,130
 

8.
DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS

8.a)
Other receivables

  
2025
  
2024
 
  
Current
  
Non Current
  
Current
  
Non Current
 
Turnover tax balance
  
180,806
   
-
   
139,480
   
-
 
VAT credit balance
  
8,917,916
   
-
   
2,107,960
   
-
 
Income tax credit balance (1)
  
-
   
-
   
526,896
   
-
 
Other tax receivables
  
792,533
   
-
   
804,264
   
-
 
Prepaid expenses
  
12,691,398
   
9,503
   
8,551,536
   
20,397
 
Advances to suppliers (2)
  
185,599,630
   
-
   
40,069,610
   
-
 
Subsidies receivables
  12,720,094   -   14,314,749   - 
Deposits in guarantee
  
204,072
   
-
   
249,252
   
-
 
Other Receivables UT
  
107,346
   
-
   
98,242
   
-
 
Others
  
550,390
   
421,894
   
1,290,321
   
554,996
 
Total
  
221,764,185
   
431,397
   
68,152,310
   
575,393
 

(1)
Provisions, net of advances paid, withholdings and perceptions
(2)
As of December 31, 2025 and 2024, it includes Ps. 71,941,018 and Ps. 2,789,309,corresponding to Other current credits with SACDE Sociedad Argentina de Diseño y Desarrollo Estratégico S.A. See Note 21 “Balances and transactions with related companies”.

8.b)
Trade receivables

  
2025
  2024
 
  
Current
  
Current
 
Third parties
  
180,772,194
   
187,931,443
 
Natural Gas Transportation
  
82,019,784
   
82,806,139
 
Liquids Production and Commercialization
  
47,778,830
   
60,013,743
 
Midstream
  
50,973,580
   
45,111,561
 
Related parties (Note 21)
  
26,089,960
   
17,703,268
 
Natural Gas Transportation
  
2,854,551
   
2,965,063
 
Liquids Production and Commercialization
  
798,214
   
3,127,822
 
Midstream
  
22,437,195
   
11,610,383
 
Impairment of financial assets
  
(10,247,410
)
  
(396,975
)
Total
  
196,614,744
   
205,237,736
 

F - 34
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The movement of the impairment of financial assets is as follows:

Balances as of 12/31/2022
  
1,182,188
 
Inflation adjustment restatement
  (802,562)
Additions (1)
  
488,750
 
Applications
  
(3,910
)
Reversals
  
-
 
Balances as of 12/31/2023
  
864,466
 
Inflation adjustment restatement
  
(467,491
)
Additions 
  
-
 
Applications
  
-
 
Reversals
  
-
 
Balances as of 12/31/2024
  
396,975
 
Inflation adjustment restatement
  (1,228,332)
Additions (1) (2)  11,078,767 
Applications
  - 
Reversals
  - 
Balances as of 12/31/2025
  10,247,410 
(1)Included in “Selling expenses”.
(2)It relates to a customer from the Natural Gas Transportation business segment.

8.c)
Cash and cash equivalents

  
2025
  
2024
 
Cash and banks
  
11,982,522
   
55,064,771
 
UT Cash and banks
  
1,005
   
308
 
Mutual funds in local market
  
84,626,165
   
23,306,406
 
Interest-bearing accounts
  
707,496,836
   
523,153
 
Total
  
804,106,528
   
78,894,638
 

8.d)
Contract liabilities

  
2025
  
2024
 
  
Current
  
Non Current
  
Current
  
Non Current
 
Natural Gas Transportation
  
3,219,381
   
42,991,720
   
3,219,381
   
46,211,330
 
Liquids Production and Commercialization
  
-
   
-
   
941,038
   
-
 
Midstream
  
5,631,491
   
94,872,929
   
5,642,229
   
100,749,773
 
UT
  
10,931
   
-
   
14,380
   
-
 
Total
  
8,861,803
   
137,864,649
   
9,817,028
   
146,961,103
 

During fiscal years 2025, 2024 and 2023, the Company recognized Ps. 11,031,192, Ps. 10,726,389 and Ps. 11,707,811, respectively, as revenues from contracts with customers in the Statement of Comprehensive Income, which had been included in the balance at the beginning of each year.

Revenues related to the contract liabilities will be recognized in the Statement of Comprehensive Income in accordance with the schedule stipulated with the customers for the provision of the service, which will be completed between 2026 and 2053.

8.e)
Other payables

  
2025
  
2024
 
  
Current
  
Current
 
Payable for compensation for the Board of Directors and Supervisory Committee
  
338,009
   
312,924
 
Others
  
8,880
   
8,033
 
Total
  
346,889
   
320,957
 


F - 35
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
8.f)
Taxes payables

  
2025
  
2024
 
  
Current
  
Current
 
Health and safety tax
  
397,840
   
370,362
 
Withholdings and perceptions made to third parties
  
7,786,238
   
7,953,525
 
Turnover Tax
  
2,579,776
   
2,676,617
 
Tax on exports
  
-
   
2,554,206
 
Others
  
669,080
   
617,813
 
Total
  
11,432,934
   
14,172,523
 

8.g)
Trade payables

  
2025
  
2024
 
  
Current
  
Current
 
Suppliers
  
78,215,143
   
71,162,273
 
UT Suppliers
  
1,233,007
   
1,416,483
 
Customers (credit balances)
  
10,657
   
77,983
 
Related companies (Note 21)
  
20,997,152
   
28,270,790
 
Total
  
100,455,959
   
100,927,529
 

8.h)
Revenues

  
2025
  
2024
  
2023 		 
Sales of goods and services
  
1,706,290,703
   
1,587,284,426
   
1,272,731,728
 
Government grants  
14,335,379
   
17,303,006
   
24,408,466
 
Total
  
1,720,626,082
   
1,604,587,432
   
1,297,140,194
 
Disaggregation of revenues of goods and services

Below is a table in which revenues are disaggregated considering the type of market and the opportunity to satisfy performance obligations:

Year ended December 31, 2025
 
     
Liquids Production
          
  
Natural Gas
  
and
  
       

 
Transportation
  
Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Primary geographical market
               
External market
  
-
   
292,674,349
   
-
   
-
   
292,674,349
 
Local market
  
705,124,167
   
353,563,150
   
347,314,231
   
7,614,806
   
1,413,616,354
 
Total
  
705,124,167
   
646,237,499
   
347,314,231
   
7,614,806
   
1,706,290,703
 
Timing of revenue recognition:
                    
Over the time
  
705,124,167
   
22,959,047
   
347,314,231
   
7,614,806
   
1,083,012,251
 
At a point in time
  
-
   
623,278,452
   
-
   
-
   
623,278,452
 
Total
  
705,124,167
   
646,237,499
   
347,314,231
   
7,614,806
   
1,706,290,703
 

Year ended December 31, 2024
 
     
Liquids Production
          
  
Natural Gas
  
and
  
       

 
Transportation
  
Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Primary geographical market
               
External market
  
-
   
374,369,704
   
-
   
-
   
374,369,704
 
Local market
  
580,295,884
   
340,609,848
   
283,797,245
   
8,211,745
   
1,212,914,722
 
Total
  
580,295,884
   
714,979,552
   
283,797,245
   
8,211,745
   
1,587,284,426
 
Timing of revenue recognition:
                    
Over the time
  
580,295,884
   
39,029,389
   
283,797,245
   
8,211,745
   
911,334,263
 
At a point in time
  
-
   
675,950,163
   
-
   
-
   
675,950,163
 
Total
  
580,295,884
   
714,979,552
   
283,797,245
   
8,211,745
   
1,587,284,426
 

F - 36
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Year ended December 31, 2023
 
     
Liquids Production
          
  
Natural Gas
  
and
  
       

 
Transportation
  
Commercialization
  
Midstream
  
Telecommunications
  
Total
 
Primary geographical market
               
External market
  
-
   
273,260,160
   
-
   
-
   
273,260,160
 
Local market
  
283,750,792
   
462,647,852
   
245,256,395
   
7,816,529
   
999,471,568
 
Total
  
283,750,792
   
735,908,012
   
245,256,395
   
7,816,529
   
1,272,731,728
 
Timing of revenue recognition:
                    
Over the time
  
283,750,792
   
42,225,234
   
245,256,395
   
7,816,529
   
579,048,950
 
At a point in time
  
-
   
693,682,778
   
-
   
-
   
693,682,778
 
Total
  
283,750,792
   
735,908,012
   
245,256,395
   
7,816,529
   
1,272,731,728
 

Detailed information of revenues on each business segment for the years ended December 31, 2025, 2024 and 2023 is disclosed below:

 ➢
Natural Gas Transportation:

  
2025
  
2024
  
2023
 
Firm
  
567,936,038
   
486,351,600
   
231,989,515
 
Access and Charge
  
27,537,992
   
20,480,767
   
9,296,193
 
Interruptible and others
  
109,650,137
   
73,463,517
   
42,465,084
 
Total
  
705,124,167
   
580,295,884
   
283,750,792
 

 ➢
Liquids Production and Commercialization:

  
2025
  
2024
  2023
 
Product
  
621,886,251
   
675,545,116
   
693,682,778
 
Services
  
24,351,248
   
39,434,436
   
42,225,234
 
Total
  
646,237,499
   
714,979,552
   
735,908,012
 

 ➢
Midstream:

  
2025
  
2024
  2023
 
Conditioning and treatment
  
39,684,737
   
43,366,370
   
44,722,510
 
Operation and maintenance  
13,518,916
   
9,912,970
   
8,062,992
 
Steam sales  
1,879,261
   
3,054,011
   
3,034,797
 
Construction  
537,858
   
-
   
961,779
 
UT Construction  -
   -   69,089
 
Transportation and conditioning of Natural Gas  287,179,223
   219,700,603   179,099,963
 
Others  4,514,236
   7,763,291   9,305,265
 
Total  347,314,231
   283,797,245   245,256,395
 

8.i)
Cost of sales

  
2025
  
2024
  
2023
 
Inventories at the beginning of the year
  
4,820,873
   
21,969,822
   
16,356,596
 
Purchases
  
258,844,388
   
264,696,392
   
383,795,400
 
Operating expenses (Note 8.j.)
  
534,087,506
   
474,875,929
   
437,515,726
 
Inventories at the end of the year
  
(10,364,857
)
  
(4,820,873
)
  
(21,969,822
)
Total
  
787,387,910
   
756,721,270
   
815,697,900
 

F - 37
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
8.j)
Expenses by nature – Information required under art. 64 paragraph I, clause B) Commercial Companies Law for the years ended December 31, 2025, 2024 and 2023

  2025 
                   
     
Operating expenses
          
Accounts
 
Total
  
Regulated
activities
  
Non-regulated
activities
  
Administrative
expenses
  
Selling
expenses
  
Financial
expenses
 
                   
Salaries, wages and other compensations
  
144,176,852
   
59,967,549
   
51,297,972
   
25,626,186
   
7,285,145
   
-
 
Social security taxes
  
24,333,728
   
9,887,055
   
9,179,425
   
3,833,099
   
1,434,149
   
-
 
Compensation to Directors and Supervisory Committee
  
1,238,276
   
-
   
-
   
1,238,276
   
-
   
-
 
Professional services fees
  
35,786,757
   
4,714,646
   
4,069,490
   
21,416,252
   
5,586,369
   
-
 
Technical operator assistance fees
  
32,931,332
   
14,697,735
   
18,233,597
   
-
   
-
   
-
 
Materials
  
24,812,013
   
9,995,535
   
14,816,247
   
-
   
231
   
-
 
Third parties services
  
17,939,591
   
6,088,333
   
10,872,081
   
979,177
   
-
   
-
 
Telecommunications and post expenses
  
811,859
   
218,953
   
184,399
   
314,764
   
93,743
   
-
 
Rents
  
5,382,730
   
465,495
   
4,774,416
   
137,435
   
5,384
   
-
 
Transports and freight
  
7,602,261
   
4,341,031
   
3,114,247
   
146,819
   
164
   
-
 
Easements
  
2,566,160
   
2,566,160
   
-
   
-
   
-
   
-
 
Offices supplies
  
565,806
   
271,188
   
80,601
   
185,631
   
28,386
   
-
 
Travel expenses
  
2,987,532
   
1,543,942
   
597,009
   
728,402
   
118,179
   
-
 
Insurance
  
11,833,551
   
4,597,199
   
3,489,905
   
3,736,934
   
9,513
   
-
 
Property, plant and equipment maintenance
  
81,446,068
   
60,791,900
   
19,043,657
   
1,610,511
   
-
   
-
 
Depreciation of property, plant and equipment
  
201,961,353
   
118,745,888
   
78,354,294
   
4,861,171
   
-
   
-
 
Taxes and contributions
  
98,481,829
   
11,782,867
   
586,801
   
199,689
   
85,912,472
(1) 
  
-
 
Advertising
  
3,404,833
   
-
   
740
   
-
   
3,404,093
   
-
 
Impairment of financial assets
  11,078,767   -   -   -   11,078,767   - 
Banks expenses
  
2,087,942
   
-
   
-
   
2,087,942
   
-
   
-
 
Interests expenses
  
88,652,830
   
-
   
-
   
-
   
-
   
88,652,830
 
Foreign exchange loss
  
297,610,053
   
-
   
-
   
-
   
-
   
297,610,053
 
Other expenses
  
5,107,505
   
1,431,086
   
3,286,063
   
87,660
   302,696    
-
 
Total 2025
  
1,102,799,628
   
312,106,562
   
221,980,944
   
67,189,948
   
115,259,291
   
386,262,883
 
(1)
Includes tax on exports for Ps. 22,287,474 for the year ended December 31, 2025.

F - 38
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  2024 
                   
     
Operating expenses
          
Accounts
 
Total
  
Regulated
activities
  
Non-regulated
activities
  
Administrative
expenses
  
Selling
expenses
  
Financial
expenses
 
                   
Salaries, wages and other compensations
  
137,732,303
   
57,492,904
   
47,748,530
   
25,290,408
   
7,200,461
   
-
 
Social security taxes
  
23,535,694
   
9,599,385
   
8,451,642
   
4,138,967
   
1,345,700
   
-
 
Compensation to Directors and Supervisory Committee  
1,145,427
   
-
   
-
   
1,145,427
   
-
   
-
 
Professional services fees
  
28,594,551
   
2,941,092
   
3,227,750
   
19,234,049
   
3,191,660
   
-
 
Technical operator assistance fees
  
34,736,319
   
13,190,835
   
21,545,484
   
-
   
-
   
-
 
Materials
  
24,230,359
   
8,399,808
   
15,820,833
   
-
   
9,718
   
-
 
Third parties services
  
14,865,807
   
5,636,967
   
8,196,911
   
1,031,929
   
-
   
-
 
Telecommunications and post expenses
  
1,218,507
   
323,940
   
432,230
   
405,771
   
56,566
   
-
 
Rents
  
4,812,556
   
610,563
   
4,064,025
   
125,821
   
12,147
   
-
 
Transports and freight
  
6,477,071
   
3,754,845
   
2,602,870
   
119,356
   
-
   
-
 
Easements
  
1,576,440
   
1,576,440
   
-
   
-
   
-
   
-
 
Offices supplies
  
461,811
   
177,176
   
85,799
   
174,407
   
24,429
   
-
 
Travel expenses
  
3,722,045
   
1,560,214
   
588,323
   
1,435,934
   
137,574
   
-
 
Insurance
  
4,784,199
   
2,575,842
   
2,189,969
   
-
   
18,388
   
-
 
Property, plant and equipment maintenance
  
71,698,012
   
51,701,158
   
17,679,736
   
2,316,921
   
197
   
-
 
Depreciation of property, plant and equipment
  
170,574,036
   
107,650,353
   
57,651,860
   
5,271,823
   
-
   
-
 
Taxes and contributions
  
100,286,896
   
13,171,985
   
452,737
   
149,653
   
86,512,521
(1)    
-
 
Advertising
  
2,893,438
   
-
   
153
   
-
   
2,893,285
   
-
 
Banks expenses
  
1,515,415
   
-
   
-
   
1,515,415
   
-
   
-
 
Interests expenses
  
73,285,957
   
-
   
-
   
-
   
-
   
73,285,957
 
Foreign exchange loss
  
199,650,890
   
-
   
-
   
-
   
-
   
199,650,890
 
Other expenses
  
4,013,542
   
1,294,189
   
2,479,381
   
34,647
   
205,325
   
-
 
Total 2024
  
911,811,275
   
281,657,696
   
193,218,233
   
62,390,528
   
101,607,971
   
272,936,847
 
(1)
Includes tax on exports for Ps. 30,423,023 for the year ended December 31, 2024.

F - 39
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  2023 
                   
     
Operating expenses
          
Accounts
 
Total
  
Regulated
activities
  
Non-regulated
activities
  
Administrative
expenses
  
Selling
expenses
  
Financial
expenses
 
                   
Salaries, wages and other compensations
  
133,848,043
   
54,348,642
   
45,060,597
   
27,538,473
   
6,900,331
   
-
 
Social security taxes
  
22,161,557
   
9,301,873
   
8,029,311
   
3,505,001
   
1,325,372
   
-
 
Compensation to Directors and Supervisory Committee  
1,166,017
   
-
   
-
   
1,166,017
   
-
   
-
 
Professional services fees
  
21,265,254
   
1,281,268
   
2,284,214
   
12,980,433
   
4,719,339
   
-
 
Technical operator assistance fees
  
17,412,376
   
684,080
   
16,728,296
   
-
   
-
   
-
 
Materials
  
22,029,188
   
6,011,999
   
16,017,189
   
-
   
-
   
-
 
Third parties services
  
13,666,594
   
6,693,234
   
6,437,237
   
536,123
   
-
   
-
 
Telecommunications and post expenses
  
619,665
   
132,089
   
248,180
   
211,259
   
28,137
   
-
 
Rents
  
3,769,074
   
450,381
   
3,209,987
   
102,882
   
5,824
   
-
 
Transports and freight
  
6,439,951
   
3,958,550
   
2,388,345
   
93,027
   
29
   
-
 
Easements
  
2,296,518
   
2,296,518
   
-
   
-
   
-
   
-
 
Offices supplies
  
734,870
   
360,448
   
141,061
   
206,751
   
26,610
   
-
 
Travel expenses
  
2,754,814
   
1,401,623
   
655,963
   
584,100
   
113,128
   
-
 
Insurance
  
6,076,787
   
3,570,521
   
2,128,071
   
378,195
   
-
   
-
 
Property, plant and equipment maintenance
  
58,077,413
   
42,948,295
   
13,873,256
   
1,255,862
   
-
   
-
 
Depreciation of property, plant and equipment
  
173,677,316
   
107,711,058
   
57,027,839
   
8,938,419
   
-
   
-
 
Taxes and contributions
  
88,979,955
   
17,173,664
   
490,635
   
577,248
   
70,738,408
(1)    
-
 
Advertising
  
2,534,187
   
-
   
676
   
-
   
2,533,511
   
-
 
Impairment of financial assets
  488,750   -   -   -   488,750   - 
Banks expenses
  
477,297
   
-
   
-
   
477,297
   
-
   
-
 
Interests expenses
  
70,549,538
   
-
   
-
   -
   
-
   
70,549,538
 
Foreign exchange loss
  
1,372,385,135
   
-
   
-
   
-
   
-
   
1,372,385,135
 
Other expenses
  
4,756,861
   
1,692,772
   
2,777,854
   
17,485
   
268,750
   
-
 
Total 2023
  2,026,167,160
   
260,017,015
   
177,498,711
   58,568,572
   
87,148,189
   1,442,934,673
 
(1)
Includes tax on exports for Ps. 23,591,931 for the year ended December 31, 2023.

F - 40
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
8.k)
Net financial results

  
2025
  
2024
  
2023
 
Financial income
         
Interest income
  
32,704,620
   
30,578,000
   
69,294,820
 
Foreign exchange gain
  
185,761,132
   
122,275,649
   
774,074,871
 
Subtotal
  
218,465,752
   
152,853,649
   
843,369,691
 
Financial expenses
            
Interest expense (1)
  
(88,652,830
)
  
(73,285,957
)
  
(70,549,538
)
Foreign exchange loss
  
(297,610,053
)
  
(199,650,890
)
  
(1,372,385,135
)
Subtotal
  
(386,262,883
)
  
(272,936,847
)
  
(1,442,934,673
)
Other financial results
            
Fair value gains on financial instruments through profit or loss
  
174,027,779
   
236,285,774
   
560,924,565
 
Others
  
(10,510,028
)
  
(22,846,381
)
  
(7,939,027
)
Subtotal
  
163,517,751
   
213,439,393
   
552,985,538
 
Loss on net monetary position
  
(58,886,419
)
  
(64,994,633
)
  
(161,912,121
)
Total
  
(63,165,799
)
  
28,361,562
   
(208,491,565
)
(1)
It includes Ps. 973,514, Ps. 1,853,684 and Ps. 2,733,386 of accrued interest corresponding to leasing liabilities, for the years ended December 31, 2025, 2024 and 2023, respectively.

In accordance with the provisions of IAS 29, we opted to present the gain on the monetary position in a single line included in the financial results. This presentation implies that the nominal values of the financial results have been adjusted for inflation. The real values of financial results are different from the components of financial results presented above.

8.l)
Other operating results, net

  
2025
  
2024
  
2023
 
Climate event (1)
  (54,281,299)  -   - 
Result from disposal of Property, plant and equipment
  
(428,170
)
  
(2,433,467
)
  
-
 
(Charge) / Reversal for provisions for legal claims and others (2)
  (144,360)  1,529,336   (2,007,477)
Recovery of insurance (3)  
4,569,260
   
1,517,170
   
63,226
 
Reversal of supplier provision
  2,567,781   1,519,320   - 
(Charge) of tax credits
  (6,526)  (959,727)  - 
Others
  
415,575
   
(99,995
)
  
(229,411
)
Total
  
(47,307,739
)
  
1,072,637
   
(2,173,662
)

(1)
 See Note 24.
(2)
 Including legal expenses.
(3)
 For the year ended on December 31, 2025, it includes Ps. 3,306,624corresponding to insurance advances related to the climate event.

8.m) 
Financial assets at amortized cost

 
2025
 
2024
 
 
Current
 
Current
 
Fixed term deposits in foreign currency (1)
  
355,915,568
   
316,551,696
 
Other time deposits
  -   40,747,228 
Total
  
355,915,568
   
357,298,924
 
(1)
 As of December, 31, 2025  and 2024, Ps. 217,681,095 and 188,348,377, respectively , were pledged as security for bank loans.

F - 41
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
8.n)
Financial assets at fair value through profit or loss

  
2025
  
2024
 
  
Current
  
Current
 
Corporate bonds with related parties
  
-
   
26,930,001
 
Corporate bonds   289,828,824   259,403,004 
Public debt bonds   314,582,338   265,544,763 
Equity instruments
  43,741,102   59,765,362 
Total
  
648,152,264
   
611,643,130
 
8.o)
Payroll and social security taxes payable

  
2025
  
2024
 
  
Current
  
Current
 
Vacation benefit payable
  
11,013,313
   
11,793,210
 
Annual bonus payable
  
11,080,996
   
9,281,335
 
Social security taxes payable
  
5,538,571
   
4,475,361
 
UT
  
37,458
   
34,092
 
Total
  
27,670,338
   
25,583,998
 

9.
INVESTMENTS IN ASSOCIATES

  
2025
  
2024
 
                
  
Description of securities
    
                
  
Face
  

  

  
Book
  
Book
 
 Name and issuer  value   Amount  Cost
   value   value 
                
Gas Link S.A.
 
$
1
   
502,962
   
306,899
   
5,339,609
   
1,611,906
 
Total
              
5,339,609
   
1,611,906
 

F - 42
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
10.
JOINT ARRANGEMENTS

tgs jointly with SACDE applied for the public tender launched by the Argentine Government for the construction of a connection pipeline in the province of Santa Fe. This tender was finally obtained by the UT whose sole purpose is the execution of such works. For further information, see Note 23.

The Company participates in the UT in a percentage of 51% on the rights of the assets and on the obligations related to them. tgs consolidates line by line assets, liabilities and results of the UT based on the aforementioned percentage of participation.

The breakdown of the amounts included in the Statements of Financial Position related to the Company’s participation in the UT as of December 31, 2025 and 2024 and its results as of December 31, 2025, 2024 and 2023 is the following:

  
2025
  
2024
 
Consolidated Statements of Financial Position
      
Non current assets
  
-
   
-
 
Current assets
  
265,939
   
260,470
 
Total assets
  
265,939
   
260,470
 
Non current liabilities
  
-
   
-
 
Current liabilities
  
2,508,685
   
2,867,037
 
Total liabilities
  
2,508,685
   
2,867,037
 

  
2025
  
2024
  
2023
 
Consolidated Statements of Comprehensive Income
         
Gross profit / (loss)
  
14,358
   
(669,392
)
  
(294,321
)
Operating loss
  
(141,575
)
  
(747,193
)
  
(420,202
)
Net Financial results
  
513,088
   
1,196,668
   
1,858,635
 
Comprehensive income
  
371,513
   
449,475
   
1,438,433
 

11.
SHARE OF PROFIT / (LOSS) FROM ASSOCIATES


 
2025
  
2024
  
2023
 
EGS (liquidated)
  
-
   
-
   
(6,245
)
TGU (liquidated)
  
-
   
(76,655
)
  
(43,793
)
Link
  
3,727,703
   
397,371
   
(37,045
)
Total
  
3,727,703
   
320,716
   
(87,083
)

F - 43
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
12.
PROPERTY, PLANT AND EQUIPMENT

 
 2025
 
 
 
Cost
  
Depreciations
    
 
                
Accumulated at
           
Accumulated at
    
 
 
Beginning
           End of
   the beginning            the end   Net book
 
Account
 
of the year
  
Additions
  
Retirements
  
Transfers
  
the year
  
of the year
  
Retirements
  
For the year
  
Rate %
  
of the year
  
value
 
                                  
Pipelines
  
2,433,488,565
   
-
   
-
   
14,941,551
   
2,448,430,116
   
1,422,270,851
   
-
   
63,880,305
   
2.2
   
1,486,151,156
   
962,278,960
 
                                             
Compressor plants
  
1,134,480,070
   
-
   
-
   
43,197,182
   
1,177,677,252
   
822,954,706
   
-
   
40,474,571
  
3.3 a 25
   
863,429,277
   
314,247,975
 
                                             
Other plants
  
1,299,630
   
-
   
-
   
-
   
1,299,630
   
478,234
   
-
   
40,340
   
3.3
   
518,574
   
781,056
 
                                             
Stations of regulation and/or
measurement of pressure
  
92,205,769
   
371,643
   
-
   
4,542,838
   
97,120,250
   
72,705,131
   
-
   
1,348,343
   
4.0
   
74,053,474
   
23,066,776
 
                                             
Other technical installations
  
25,830,433
   
-
   
-
   
2,797,073
   
28,627,506
   
15,843,052
   
-
   
889,219
   
6.7
   
16,732,271
   
11,895,235
 
                                             
Subtotal assets related to Natural Gas Transportation segment regulated by ENARGAS
  
3,687,304,467
   
371,643
   
-
   
65,478,644
   
3,753,154,754
   
2,334,251,974
   
-
   
106,632,778
       
2,440,884,752
   
1,312,270,002
 
                                             
Non-regulated segment Pipelines
  
461,364,152
   
-
   
-
   
20,953,090
   
482,317,242
   
72,135,484
   
-
   
15,686,683
   
2.2
   
87,822,167
   
394,495,075
 
                                             
Non-regulated segment Compressor plants
  
76,152,076
   
-
   
-
   
941,920
   
77,093,996
   
65,352,871
   
-
   
6,276,221
  
3.3 a 25
   
71,629,092
   
5,464,904
 
                                             
Non-regulated segment Other plants
  
1,094,402,809
   
66,434
   
(309,674
)
  
247,537,848
   
1,341,697,417
   
458,845,512
   
(90,677
)
  
47,361,415
   
3.3
   
506,116,250
   
835,581,167
 
                                             
Non-regulated segment Stations of regulation and/or measurement of pressure
  
26,954,481
   
-
   
-
   
2,045,465
   
28,999,946
   
7,836,531
   
-
   
1,043,921
   
4.0
   
8,880,452
   
20,119,494
 
                                             
Non-regulated segment Other technical installations
  
9,708,169
   
-
   
-
   
-
   
9,708,169
   
7,561,485
   
-
   
801,595
   
6.7
   
8,363,080
   
1,345,089
 
                                             
Subtotal assets related to Midstream and Liquids Production and Commercialization segments
  
1,668,581,687
   
66,434
   
(309,674
)
  
271,478,323
   
1,939,816,770
   
611,731,883
   
(90,677
)
  
71,169,835
       
682,811,041
   
1,257,005,729
 
                                             
Lands
  15,842,034
   
-
   
-
   
-
   
15,842,034
   
-
   
-
   
-
   
-
   
-
   
15,842,034
 
                                             
Buildings and constructions
  
166,770,156
   
-
   
-
   
2,567,938
   
169,338,094
   
81,549,377
   
-
   
4,196,185
   
2.0
   
85,745,562
   
83,592,532
 
                                             
Fittings and features in building
  
16,813,485
   
-
   
-
   
175,049
   
16,988,534
   
7,310,150
   
-
   
1,478,885
   
4.0
   
8,789,035
   
8,199,499
 
                                             
Machinery, equipment and tools
  
54,511,025
   
5,209,584
   
(4,186,032
)
  
5,970
   
55,540,547
   
44,448,530
   
(3,499,816
)
  
3,469,804
  
6.7 a 10
   
44,418,518
   
11,122,029
 
                                             
UT Machinery, equipment and tools
  
32,479
   
-
   
-
   
-
   
32,479
   
32,479
   
-
   
-
  
6.7 a 10
   
32,479
   
-
 
                                             
Computers and Telecommunication systems
  
241,152,392
   
253,524
   
(623,056
)
  
7,378,494
   
248,161,354
   
194,697,803
   
(585,710
)
  
13,108,907
  
6.7 a 20
   
207,221,000
   
40,940,354
 
                                             
Vehicles
  
24,152,066
   
3,956,200
   
(2,110,841
)
  
2,658
   
26,000,083
   
17,579,452
   
(1,824,957
)
  
1,840,267
   
20
   
17,594,762
   
8,405,321
 
                                             
Furniture
  
8,723,479
   
-
   
-
   
90,702
   
8,814,181
   
8,274,580
   
-
   
64,692
   
10
   
8,339,272
   
474,909
 
                                             
Materials
  172,298,031
   
56,081,856
   
(4,632,647
)
  
(36,423,858
)
  
187,323,382
   
-
   
-
   
-
   
-
   
-
   
187,323,382
 
                                             
Line pack
  
19,512,960
   
-
   
-
   
-
   
19,512,960
   
987,162
   
-
   
-
   
-
   
987,162
   
18,525,798
 
                                             
Works in progress
  
362,445,404
   
177,038,407
   
(989,562
)
  
(310,753,920
)
  
227,740,329
   
-
   
-
   
-
   
-
   
-
   
227,740,329
 
                                             
Total
  
6,438,139,665
   
242,977,648
   
(12,851,812
)
  
-
   
6,668,265,501
   
3,300,863,390
   
(6,001,160
)
  
201,961,353
       
3,496,823,583
   
3,171,441,918
 

F - 44
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  2024 
 
 
Cost
  
Depreciations
       
 
                

           

  Reversal of Impairment
    
 
 
           
  
Accumulated at
           Accumulated at  of Property
  
 
Account
 
Beginning
of the year
  
Additions
  
Retirements
  
Transfers
  
End of
the year
  
the beginning
of the year
  
Retirements
  
For the year
  
Rate %
  
the end
of the year
   plant and equipment
  
Net book
value
 
                                     
Pipelines
  
2,416,011,391
   
112,291
   
(5,191,384
)
  
22,556,267
   
2,433,488,565
   
1,410,424,830
   (3,607,638)  
55,068,262
   
2.2
   
1,461,885,454
   (39,614,603)  
1,011,217,714
 
                                                 
Compressor plants
  
1,104,314,243
   86,463
   
(7,089,027
)
  
37,168,391
   
1,134,480,070
   
802,786,118
   (6,539,215)  
38,606,565
  
3.3 a 25
   
834,853,468
   (11,898,762)  
311,525,364
 
                                                 
Other plants
  
945,849
   
-
   -
   353,781
   
1,299,630
   
466,621
   -
   
30,681
   3.3
   
497,302
   (19,068)  821,396
 
                                                 
Stations of regulation and/or
measurement of pressure
  
89,042,422
   -
   (655,781)  
3,819,128
   
92,205,769
   
71,434,720
   (463,202)  
2,264,433
   4.0
   
73,235,951
   (530,820)  
19,500,638
 
                                                 
Other technical installations
  
22,840,002
   -
   -
   
2,990,431
   
25,830,433
   
15,130,471
   -
   
775,997
   
6.7
   
15,906,468
   (63,416)  
9,987,381
 
                                                 
Subtotal assets related to Natural Gas Transportation segment regulated by ENARGAS
  
3,633,153,907
   198,754
   
(12,936,192
)
  
66,887,998
   
3,687,304,467
   
2,300,242,760
   (10,610,055)  
96,745,938
       
2,386,378,643
   (52,126,669)  
1,353,052,493
 
                                                 
Non-regulated segment Pipelines
  
460,094,143
   -
   -
   
1,270,009
   
461,364,152
   
56,878,478
   -
   
15,257,006
   2.2
   
72,135,484
   -   
389,228,668
 
                                                 
Non-regulated segment Compressor plants
  
76,151,455
   -   -
   
621
   
76,152,076
   
58,775,071
   -
   
6,577,800
  
3.3 a 25
   
65,352,871
   -   
10,799,205
 
                                                 
Non-regulated segment Other plants
  
831,859,147
   -
   (112,769)  
262,656,431
   
1,094,402,809
   
431,388,127
   (38,999)  
27,496,384
   
3.3
   
458,845,512
   -   
635,557,297
 
                                                 
Non-regulated segment Stations of regulation and/or measurement of pressure
  
25,270,325
   
-
   -   
1,684,156
   
26,954,481
   
6,658,963
   -
   
1,177,568
   
4.0
   
7,836,531
   -   
19,117,950
 
                                                 
Non-regulated segment Other technical installations
  
9,708,169
   -
   -
   
-
   
9,708,169
   
6,759,890
   -
   
801,595
   
6.7
   
7,561,485
   -   
2,146,684
 
                                                 
Subtotal assets related to Midstream and Liquids Production and Commercialization segments
  
1,403,083,239
   
-
   (112,769)  
265,611,217
   
1,668,581,687
   
560,460,529
   (38,999)  
51,310,353
       
611,731,883
   -   
1,056,849,804
 
                                                 
Lands
  15,357,548   -
   -
   484,486
   
15,842,034
   -
   -
   -
   -
   -
   -   
15,842,034
 
                                                 
Buildings and constructions
  
155,391,347
   -
   
(331,950
)
  
11,710,759
   
166,770,156
   
77,713,448
   (201,327)  
4,037,256
   2.0
   
81,549,377
   -   
85,220,779
 
                                                 
Fittings and features in building
  
17,000,512
   -
   
-
   
(187,027
)
  
16,813,485
   5,837,768   -   
1,472,382
   
4.0
   7,310,150   -   
9,503,335
 
                                                 
Machinery, equipment and tools
  
51,170,215
   
3,185,088
   (5,094)  
160,816
   
54,511,025
   
40,789,054
   (5,094)  
3,664,570
  
6.7 a 10
   
44,448,530
   -   
10,062,495
 
                                                 
UT Machinery, equipment and tools
  
32,479
   -
   -
   -
   
32,479
   
32,479
   -
   -
  
6.7 a 10
   
32,479
   -   -
 
                                                 
Computers and Telecommunication systems
  
227,218,701
   -
   
-
   13,933,691
   
241,152,392
   
183,083,677
   -
   
11,614,126
  
6.7 a 20
   
194,697,803
   -   
46,454,589
 
                                                 
Vehicles
  
21,767,906
   
2,827,933
   
(446,144
)
  2,371
   
24,152,066
   
16,368,950
   (446,144)  
1,656,646
   20.0
   
17,579,452
   -   
6,572,614
 
                                                 
Furniture
  
8,635,219
   
568
   -
   87,692
   
8,723,479
   
8,201,815
   -
   72,765   10.0
   
8,274,580
   -   
448,899
 
                                                 
Materials
  143,835,898   
85,494,627
   
(1,170,938
)
  
(55,861,556
)
  
172,298,031
   -
   -
   -
   -
   -
   -   
172,298,031
 
                                                 
Line pack
  
19,512,960
   -
   -
   -
   
19,512,960
   
987,162
   -   -
   -
   987,162   -   
18,525,798
 
                                                 
Works in progress
  
341,897,434
   
323,378,417
   -
   
(302,830,447
)
  
362,445,404
   -
   -
   -
   -
   -
   -   
362,445,404
 
                                                 
Total
  
6,038,057,365
   
415,085,387
   
(15,003,087
)
  -
   
6,438,139,665
   
3,193,717,642
   (11,301,619)  
170,574,036
       3,352,990,059   (52,126,669)  
3,137,276,275
 

F - 45
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The following is the composition of the resulting net value of Property, plant and equipment as of December 31, 2025 and 2024:

  
2025
  
2024
 
Cost
  
6,668,265,501
   
6,438,139,665
 
Accumulated depreciation
  
(3,496,823,583
)
  
(3,352,990,059
)
Reversal of Impairment
  -   52,126,669 
Total
  
3,171,441,918
   
3,137,276,275
 

As of December 31, 2025 and 2024, Property, plant and equipment contains the following assets for right of use:

 
 
2025
  
2024
 
Other plants
  
1,600,835
   
4,002,086
 
Compressor plants
  
3,974,443
   
9,936,108
 
Other technical installations
  
451,926
   
1,129,816
 
Buildings
  2,078,295   3,117,443 
Total
  
8,105,499
   
18,185,453
 

The depreciations recorded in the years 2025, 2024 and 2023 of the right-of-use assets correspond to the following:

  
2025
  
2024
  
2023
 
Other plants
  
(2,401,253
)
  
(2,401,253
)
  (2,401,253)
Compressor plants
  
(5,961,665
)
  
(5,961,665
)
  (5,961,665)
Other technical installations
  
(677,889
)
  
(677,889
)
  (677,889)
Buildings
  (1,039,147)  (1,039,147)  (1,039,147)
Total
  
(10,079,954
)
  
(10,079,954
)
  (10,079,954)

The right to use these assets expires in September 2026 and December 2027.

13.
LOANS

Short-term and long-term loans as of December 31, 2025 and 2024 comprise the following:

  2025
  2024
 
Current Loans
      
2031 Notes Interest
  26,260,325    24,502,115  
2035 Notes Interest
  
6,264,583
   
-
 
Bank loans
  203,789,828    68,355,793  
Leases liabilities
  
8,562,997
   
10,271,561
 
Total Current Loans
  
244,877,733
   
103,129,469
 
Non Current Loans
        
2031 Notes
  
699,077,537
   
651,882,328
 
2035 Notes
  707,570,736    -  
Bank loans
  47,857,094   - 
Leases liabilities
  
1,232,191
   
8,115,232
 
Other loans
  4,990,826    -  
Total Non Current Loans
  
1,460,728,384
   
659,997,560
 
Total Loans (1)
  
1,705,606,117
   
763,127,029
 
(1)
Net of issuance expenses and issue price of Ps. 33,801,727 and Ps. 13,333,444as of December 31, 2025 and 2024, respectively.

F - 46
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Loans are totally denominated in US dollars.

The activity of the loans as of December 31, 2025, 2024, and 2023 is the following:

  
2025
  
2024
  2023 
  
Leases
liabilities
  
Other
payables
  
Leases
liabilities
  
Other
payables
  
Leases
liabilities
  
Other
payables
 
Beginning balance
  
18,386,793
   
744,740,236
   
49,318,579
   
1,301,790,862
   38,022,157   806,006,269 
Inflation adjustment restatement
  
(8,719,866
)
  
(231,398,032
)
  
(27,934,728
)
  
(737,983,982
)
  (50,367,759)  (760,331,956)
Accrued interest
  
973,514
   
77,184,305
   
1,853,685
   
62,650,794
   2,628,360   19,817,421 
Effect of foreign exchange difference
  
10,393,879
   
283,610,986
   
7,954,782
   
200,656,085
   64,424,385   1,210,328,448 
Proceeds from loans
  -   887,256,557   -   770,027,997   5,155,167   102,393,769 
Payment of loans(1)
  
(10,327,048
)
  
(582,140
)
  
(10,857,412
)
  
(810,265,371
)
  (8,262,415)  (31,198,443)
Interest paid(2)
  
(912,084
)
  
(65,000,983
)
  
(1,948,113
)
  
(42,136,149
)
  (2,281,316)  (45,224,646)
Ending balance
  
9,795,188
   
1,695,810,929
   
18,386,793
   
744,740,236
   49,318,579   1,301,790,862 
(1)
For the years ended December 31, 2025, 2024 and 2023, of the total of leases liabilities, Ps. 9,498,794, Ps. 9,856,279 and Ps. 7,688,661respectively, were cancelled through the offsetting debit balances maintained with the creditor (Pampa Energía).
(2)
For the years ended December 31, 2025, 2024 and 2023, of the total of leases liabilities, Ps. 888,046 , Ps. 1,906,940 and Ps. 2,281,316respectively, were cancelled through the offsetting debit balances maintained with the creditor (Pampa Energía).

The maturities of current and non-current financial debt, net of issuance expenses, as of December 31, 2025 are as follows:

     
To due
    
  
Due
  
As of
12/31/2026
  
From
1/01/2027 to
12/31/2027
  
From
1/01/2028 to
12/31/2028
  
From
1/01/2029 to
12/31/2029
  
From
01/01/2030
onwards
  
Total
 
2031 Notes   -    -    -    -    -    699,077,537     699,077,537  
2035 Notes
  -   -   -   -   -   707,570,736   707,570,736 
2031 Notes interests
  
-
   
26,260,325
   
-
   
-
   
-
   -   
26,260,325
 
2035 Notes interests
  -   6,264,583   -   -   -   -   6,264,583 
Lease liabilities
  
-
   
8,562,997
   
1,232,191
   
-
   
-
   -   
9,795,188
 
Bank loans
  -    203,789,828    -    47,857,094    -    -   251,646,922  
Other loans
  -   -   4,990,826   -   -   -   4,990,826 
Total
  
-
   
244,877,733
   
6,223,017
   
47,857,094
   
-
   1,406,648,273   
1,705,606,117
 

Description of the Company’s indebtedness as of December 31, 2025

Notes

General description

On October 11, 2023, CNV approved the extension of the maximum amount of the Global Notes Program from US$ 1,200 million to US$ 2,000 million and the extension of the validity period of the Program for an additional 5 years from the expiration of the term, with the new expiration of the Program being January 3, 2029.

Class 3 Notes (“2031 Notes”)

On July 24, 2024, within the framework of the 2024 Program, the Company issued the 2031 Notes in accordance with the following characteristics:

F - 47
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
 
2031 Notes
Amount in US$
490,000,000
Interest rate
8.50%
Issuance price
98.712%

 
Scheduled
Repayment Date
Percentage of
 Original
Principal 
Amount Payable
Amortization
July 24, 2031
100%
Interest payment frequency
Semiannual, payable on January 24 and July 24 of each year.
Guarantor
-


The proceeds from the issuance of the 2031 Notes amounted to US$ 483,688,800, net of issuance discount. The Company used the net proceeds received to make a purchase and redemption of the 2018 Notes.

Class 4 Notes (“2035 Notes”)

On November 20, 2025, within the framework of the 2024 Program, the Company proceeded to issue the 2035 Notes in accordance with the following characteristics:

 
2035 Notes
Amount in US$
500,000,000
Interest rate
7.75%
Issuance price
98.301%

 
Scheduled
Repayment Date
Percentage of
 Original
Principal 
Amount Payable
Amortization
November 20, 2025
100%
Interest payment frequency
Semiannual, payable on May 20 and November 20 of each year.
Guarantor
-

The proceeds from the issuance of the 2035 Notes amounted to US$ 491,505,000, net of issuance discount. The funds will be used for general purposes, including the expansion of the GPM and the final sections of the tgs transportation system.

Covenants

As of December 31, 2025, the Company has complied with a series of restrictions derived from its current financial agreements, which include, among others, those related to obtaining new loans, payment of dividends, granting of guarantees, disposal of certain assets and transactions with related parties.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The Company may contract new debts under the following conditions, among others:

a. To the extent that after contracting the new debt (i) the consolidated coverage ratio (ratio between consolidated EBITDA (consolidated income before financial results, income tax, depreciation and amortization) and consolidated interest) is equal to or greater than 2.0:1; and (ii) the consolidated debt ratio (ratio between consolidated debts and consolidated EBITDA) is equal to or less than 3.50:1.

b. For the refinancing of outstanding financial debt.

c. Originated by customer advances.

The Company may pay dividends under the following conditions: (i) the Company is not in default under 2031 Notes, and (ii) immediately after any dividend payment, the Company may incur new debts according to the provisions in point a. of the preceding paragraph.

As of December 31, 2025, the Company and its subsidiary are in compliance with the covenants established in all of their financial debt.

As of the date of issuance of these Financial Statements, the application of the funds obtained from the issuance of 2035 Notes is still pending.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Bank loans and other loans

The following table shows the details of other financial indebtedness as of December 31, 2025:

 Type Company
Original
currency
 
Carrying amount
as of 12.31.2025
  


Average
interest rate
 
Expiration date
Bank loans
tgs
US$
  
215,864,850
   6.43
%
Between January 2026 and November 2028
Bank loans
Telcosur
US$  35,782
   5.75
%
January 26, 2026 (1)
Other loans
tgs
US$  4,990,826
   8.50
%
January 2029

(1)
See Note 26 - Subsequent events.

As of December 31, 2025, of the total amount of these loans, Ps. 202,495,583 are secured by time deposits included under “Current Financial Assets at Amortized Cost”.

During the fiscal year ended December 31, 2025, the Company incurred new loans, other than Notes, for Ps. 181,595,570.

Additionally, repayments amounting to Ps. 582,140were made.

Lease liabilities

It corresponds to the financing obtained for the acquisition of the assets corresponding to the treatment and compression plant located in the Río Neuquén area. Said agreement was entered into on August 11, 2016, with Petrobras (currently Pampa Energía) and consists of the payment of 119consecutive monthly installments of US$ 623,457 without taxes and a purchase option for the same amount payable at the end of the120th month of validity of the agreement. contract.

In January 2023, the Company entered into a new lease liability for Ps. 5,155,167. It is denominated in US dollars, payable in fixed monthly installments until December 2027.

The following table sets reconciliation between the total of future minimum lease payments as of December 31, 2025, and their present book value:

  
12/31/2025
 
As of 12/31/2026
  8,757,134 
From 1/01/2027 to 12/31/2027
  
1,238,755
 
Total minimum future payments
  
9,995,889
 
Future financial charges on financial leases
  
(200,701
)
Book Value financial leases
  
9,795,188
 

14.
INCOME TAX AND DEFERRED TAX

Tax adjustment for inflation

Law No. 27,468 establishes that in the net taxable income of the periods beginning on or after January 1, 2018, the adjustment for inflation obtained by the application of the income tax law may be deducted or incorporated into the tax result for the fiscal year. This adjustment will proceed only if the percentage variation in the IPC, will accumulate (a) a percentage higher than 100% in the 36 months prior to the end of the year, or (b) regarding the first, second and third fiscal year that starts from its effective date, an accumulated variation of the IPC that exceeds 55%, 30% or 15% of said 100%, respectively.

F - 50
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
For the fiscal years ended December 31, 2025, 2024 and 2023, the CPI has exceeded the 100% threshold mentioned above, so the Company has measured the tax charge to earnings for the years ended December 31, 2025, 2024 and 2023 considering the application of the adjustment for fiscal inflation.

According to the Solidarity Law, the positive or negative result generated by the application of the inflation adjustment corresponding to the first and second fiscal year beginning on January 1, 2019 will be charged in a sixth in that fiscal period and the five sixths remaining in equal parts in the following 5 fiscal periods. As of January 1, 2021, 100% of the adjustment may be deducted/taxed in the year in which the effect is determined.

On November 16, 2022, the Senate of the Nation approved the 2023 budget bill under Law No. 27,701, which already had half a sanction from the Chamber of Deputies.

The 2023 budget law incorporates article 195 to the income tax law establishing that in the event that the adjustment for tax inflation is applicable and a positive adjustment (profits) arises from it, the first and second fiscal years starting on 1 January 2022 inclusive, they may allocate 1/3 in that fiscal period and the remaining 2/3, in equal parts, in the 2 immediately following fiscal periods. For the deferral to be appropriate, it will be necessary for companies to make an investment in the purchase, construction, manufacture, processing or definitive import of fixed assets (except automobiles), during each of the 2 fiscal periods immediately following that of the calculation of the first third of the period in question, for an amount equal to or greater than $30,000,000,000.

As of December 31, 2023, the Company projected investments in PPE in accordance with the requirements mentioned above, determining that the amounts exceed what is established by law.

Adjustment of acquisitions and investments made in fiscal years beginning on or after January 1, 2018

A cost adjustment mechanism is established for assets acquired or investments made in fiscal years beginning on or after January 1, 2018. The adjustment will be made based on the percentage variations of the WPI.

Deferred tax

The detail of the income tax charge for the years ended December 31, 2025, 2024 and 2023 is as follows:

  
2025
  
2024
  
2023
 
Current income tax
  
(217,789,507
)
  
(286,035,776
)
  
(4,604,176
)
Deferred income tax
  
(5,393,445
)
  
7,232,018
   
(52,998,036
)
Total income tax
  
(223,182,952
)
  
(278,803,758
)
  
(57,602,212
)

F - 51
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The analysis of deferred tax assets and liabilities is as follows:

  
2025
  
2024
 
Deferred tax assets:
      
Deferred tax assets to be recovered after more than 12 months
  
20,578,418
   
26,755,838
 
Deferred tax assets to be recovered after 12 months
  
13,595,625
   
18,468,967
 
Deferred tax liabilities:
        
Deferred tax liabilities taxable after more than 12 months
  
(247,311,283
)
  
(255,851,636
)
Deferred tax liabilities taxable after 12 months
  
(27,328,718
)
  
(24,445,682
)
Deferred tax liabilities, net
  
(240,465,958
)
  
(235,072,513
)

The components of deferred tax assets and liabilities as of December 31, 2025, 2024 and 2023 is as follows:

Deferred tax assets
 
Provisions for legal
claims and other
provisions
  
Financial leases
  
Contract liabilities
  
Tax loss
carryforward
  
Tax inflation
adjustment
  
Financial assets at fair value through
profit or loss
  
Other receivables
  
Total
 
As of December 31, 2022
  5,726,523   12,890,474   24,589,415   -   112,053   1,637,983   -   44,956,448 
Charge in results
  (3,245,404)  3,759,546   (17,760,278)  4,020,329   (90,348)  6,159,037   10,287,738   3,130,620 
As of December 31, 2023
  
2,481,119
   
16,650,020
   
6,829,137
   
4,020,329
   
21,705
   
7,797,020
   10,287,738   
48,087,068
 
Charge in results
  
(2,029,440
)
  
(10,214,643
)
  
18,697,468
   
(4,020,329
)
  
(18,302
)
  
2,391,897
   (7,668,914)  
(2,862,263
)
As of December 31, 2024
  
451,679
   
6,435,377
   
25,526,605
   
-
   
3,403
   
10,188,917
   2,618,824   
45,224,805
 
Charge in results
  
433,280
   
(3,391,231
)
  
(4,062,555
)
  
-
   
(3,403
)
  
(1,374,956
)
  (2,651,897)  
(11,050,762
)
As of December 31, 2025
  
884,959
   
3,044,146
   
21,464,050
   
-
   
-
   
8,813,961
   (33,073)  
34,174,043
 

Deferred tax liabilities
 
Other receivables
  
Loans
  
Property, Plant
and Equipment
  
Cash and cash
equivalents
  
Inventories
  
Tax inflation
adjustment
  
Total
 
As of December 31, 2022
  (1,065,046)  (1,248,796)  (203,594,427)  (3,803,800)  (1,069,232)  (23,481,642)  (234,262,943)
Charge in results
  1,065,046   167,252   (19,606,247)  (11,528,531)  (2,423,616)  (23,802,560)  (56,128,656)
As of December 31, 2023
  
-
   
(1,081,544
)
  
(223,200,674
)
  
(15,332,331
)
  
(3,492,848
)
  
(47,284,202
)
  (290,391,599)
Charge in results
  
-
   
(3,585,161
)
  
(22,715,520
)
  
(3,685,230
)
  
2,731,432
   
37,348,760
   10,094,281 
As of December 31, 2024
  
-
   
(4,666,705
)
  
(245,916,194
)
  
(19,017,561
)
  
(761,416
)
  
(9,935,442
)
  (280,297,318)
Charge in results
  
-
   
(7,163,900
)
  
(1,395,089
)
  
4,745,542
   
(464,678
)
  
9,935,442
   5,657,317 
As of December 31, 2025
  
-
   
(11,830,605
)
  
(247,311,283
)
  
(14,272,019
)
  
(1,226,094
)
  
-
   (274,640,001)

Below is a reconciliation between the income tax charged to results for the years ended December 31, 2025, 2024 and 2023 and that which would result from applying the current tax rate on net income before income tax for the exercise:

  
2025
  
2024
  
2023
 
Pre tax income
  
644,043,098
   
765,749,247
   
124,973,223
 
Statutory income tax rate
  
35
%
  
35
%
  
35
%
Pre tax loss at statutory income tax rate
  
(225,415,084
)
  
(268,012,236
)
  
(43,740,628
)
Tax effects due to:
            
- Adjustment affidavit previous year
  
83,943
   
(317,610
)
  
(411,667
)
- Tax inflation adjustment and restatement by inflation
  (4,471,112)  (14,761,957)  (13,239,169)
- Others
  
6,619,301
   
4,288,045
   
(210,748
)
Total income tax
  
(223,182,952
)
  
(278,803,758
)
  
(57,602,212
)

F - 52
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
15.
EVOLUTION OF PROVISIONS

  
For legal claims and others
  
Balances as of 12/31/2022
  
16,361,494
  
Inflation adjustment restatement
  
(13,359,809
)
 
Additions
  
4,100,542
 
(1) 
Uses
  
(13,315
)
 
Decreases
  
-
  
Balances as of 12/31/2023
  
7,088,912
  
Inflation adjustment restatement
  
(3,962,027
)
 
Additions
  
687,817
 (2) 
Uses
  
-
  
Decreases
  
(3,260,757
)
(3) 
Balances as of 12/31/2024
  
553,945
  
Inflation adjustment restatement
  (187,449) 
Additions   593,899 (4) 
Uses
  -  
Decreases
  -  
Balances as of 12/31/2025  960,395  
(1)
Ps. 2,007,477 are included in “Other operating results, net” and Ps. 2,093,065 in “Financial expenses”.
(2)
Ps. 201,472 are included in “Other operating results, net” and Ps. 486,345 in “Financial expenses”.
(3)
Ps. 1,730,677 are included in “Other operating results,net” and Ps. 1,530,080 in “Financial expenses”.
(4)
Ps. 144,360 are included in “Other operating results, net” and Ps. 449,539in “Financial expenses”.

Provisions are included in current liabilities.

16.
FINANCIAL RISK MANAGEMENT

16.1 Financial risk factors

For the purpose of managing financial risks, the Company’s Management has established a set of risk management policies designed to mitigate its exposure to the financial risks arising from its operations, including market risk (including foreign exchange risk, interest rate risk, and commodity price risk), credit risk and liquidity risk.

The Company’s risk management framework establishes that a risk map is determined that measures the potential impact of each of them on the financial situation and results of operations. Based on this, the Executive Officers are responsible for defining the policies, procedures, limits and measures aimed at mitigating the impact of said risks.

The sensitivity analyzes included below are based on the change in one of the factors while all others remain constant. In practice, this is unlikely to happen, and changes in several factors can be correlated, for example, in variations in the interest rate and variations in the foreign currency exchange rate.

Sensitivity analysis only provides limited vision, at one point in time. The actual impact on the Company’s financial instruments could vary significantly with respect to the impact shown in the sensitivity analysis.

F - 53
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
16.1.1 Risk associated with exchange rates

Exchange rate risk management

In view of the main impacts of the aforementioned situation and those detailed in Note 1 to these Consolidated Financial Statements, the Company has implemented a series of measures to mitigate their impact. In this sense, the Company’s Management permanently monitors the evolution of the situations that affect its business, in order to determine the possible actions to be taken and identify the eventual impacts on its equity and financial situation. The Company considers that its current financial position will allow it to comply, in the short term, with its foreign currency commitments. The Company’s financial statements should be read in light of these circumstances.

The Company is primarily exposed to the fluctuation of the exchange rate of the U.S. dollar against the Argentine Peso due to the fact that almost its entire financial indebtedness is denominated in U.S. dollars. The exposure to other currencies is not significant.

As regards to the revenue derived from the Natural Gas Transportation segment, the tariffs charged by the Company are currently denominated in Argentine pesos. On the other hand, revenues in US dollars derived from the Liquids Production and Commercialization segment accounted for approximately 86% of the segment’s total revenues for the years ended December 31, 2025, 2024 and 2023. Total operating cost denominated in Argentine Pesos accounted for 70%, 74% and 81% for the years ended December 31, 2025, 2024 and 2023, respectively.

As of December 31, 2025, 2024 and 2023, 48%,44% and 35% of total revenues are denominated in Argentine, respectively.

tgs’ financial risk management policies are defined with the objective of mitigating the impact of exchange rate fluctuations on the Company’s foreign currency position. To this end, alternative investment evaluations are regularly carried out to diversify tgs’ investment portfolio among instruments denominated in U.S. dollars or, although denominated in Argentine pesos, to obtain positive returns in real terms.

Additionally, if deemed appropriate, the Company enters into derivative financial instruments that allow hedging the fluctuation of the U.S. dollar on the positions in such currency in the long term.

However, the Company, in order to mitigate the impact on the future variation of the exchange rate, has placed funds in assets denominated in U.S. dollars. As of December 31, 2025 and 2024, 83% and 81% of the Company’s fund placements are denominated in U.S. dollars, respectively.

For further information regarding the Company’s foreign currency position see “Note 18. Foreign currency assets and liabilities”.

Management of the Company estimates that, based on the net asset / liability position as of December 31, 2025 and 2024, a 10% appreciation in the exchange rate of the U.S. dollar against the Argentine peso, with all other economic-financial variables stable, could have resulted in a pre-tax (loss) / income of (Ps. 17,398,781)and Ps. 14,153,193, respectively. A 10% depreciation of the U.S. dollar against the Argentine peso would have an equal and opposite effect on the Statement of Comprehensive Income. This sensitivity analysis is theoretical as the actual impacts could differ significantly and vary over time.

F - 54
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
In order to mitigate the exchange rate risk, during fiscal year 2025, tgs entered into both forward purchase operations of US dollars, as well as investments in mutual funds linked to the US dollar in order to hedge exposure to the risk associated with the exchange rate that derives from its financial debt.

16.1.2 Interest rate risk

Interest rate risk management seeks to reduce financial costs and limit the Company’s exposure to increases in interest rates. tgs’ exposure to risks associated with interest rate variations is limited given that all of its financial debt is subject to fixed interest rates. Information regarding the Company’s financing is disclosed in Note 13.

In addition, the main objective of the Company’s financial investment activities is to obtain the highest return by investing in low-risk and highly liquid instruments. The Company maintains a portfolio of cash equivalents and short-term investments comprised of investments in mutual funds and deposits in interest-bearing bank accounts, public and private securities. The risk of these instruments is low since they are mostly short-term and highly liquid in recognized financial institutions.

As a consequence of the application of IAS 29, maintaining monetary assets generates loss of purchasing power, provided that such items are not subject to an adjustment mechanism that compensates to some extent the loss of purchasing power. This loss of purchasing power is included in the result of the period under gain on the net monetary position. On the contrary, maintaining monetary liabilities generates a gain in purchasing power, which are also included in such line item.

The Company’s risk management policies are defined with the objective of reducing the impact of the loss of purchasing power. During the 2025, 2024 and 2023 fiscal years the Company has maintained an asset net monetary position. As a consequence, tgs has recorded a net gain from exposure to inflation in the monetary items.

The following table shows a breakdown of the Company’s fixed-rate and floating-rate financial assets and liabilities as of December 31, 2025 and 2024:

  
Financial assets
  
Financial liabilities
 
  
2025
  
2024
  
2025 (1)
  
2024 (2)
 
Fix interest rate
  
355,915,568
   
357,298,924
   
1,695,810,929
   
744,740,236
 
Variable interest rate
  
84,626,165
   
23,306,406
   
-
   
-
 
Total
  
440,541,733
   
380,605,330
   
1,695,810,929
   
744,740,236
 
 
(1)
Includes 2031 and 2035 Notes. For further information see Note 13 to the Consolidated Financial Statements.
 
(2)
Includes 2031 Notes. For further information see Note 13 to the Consolidated Financial Statements.

In view of the nature of the Company’s financial assets which bear variable interest, an immediate 100 basis points decrease in the interest rate would not have a significant impact on the total value of the financial assets.

F - 55
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
16.1.3 Commodity price risk

Commercial operations performed by the Company in its Liquids Production and Commercialization business segment are affected by a number of factors beyond its control, including changes in the international prices of the products sold, and government regulations on prices, taxes and other charges, among others.

The sales prices of exported propane, butane and natural gasoline are determined according to international reference prices (Mont Belvieu for propane and butane and NWE ARA for natural gasoline). Additionally, most of the total sales of propane and butane that are made in the domestic market are made at prices set by the Secretary of Energy for the different market segments.

These prices have historically fluctuated in response to macroeconomic conditions and changes in supply and demand, which could affect tgs’ profitability.

Based on volume of sales for the years ended December 31, 2025, 2024 and 2023, tgs estimated that, other factors being constant, a decrease of US$ 50 per ton in the international price of LPG and natural gasoline, respectively, would have decrease the Company’s net comprehensive income in its Liquids Production and Commercialization segment in Ps. 26,940,381, Ps. 25,798,380 and Ps. 38,794,154, respectively. On the other hand, an increase of US$ 50 per ton in the international price would have had the opposite effect.

16.1.4 Credit risk

The Company’s exposures to credit risk takes the form of a loss that would be recognized if counterparties failed to, or were unable to, meet their payment obligations. These risks may arise in certain agreements in relation to amounts owed for physical product sales, the use of derivative instruments, and the investment of surplus cash balances. This risk mainly results from economic and financial factors or from a possible default of counterparty.

The Company is subject to credit risk arising from outstanding receivables, cash and cash equivalents and deposits with banks and financial institutions, and from the use of derivative financial instruments. The Company’s policy is to manage credit exposure to trading counterparties within defined trading limits.

Trade and other receivables

If any of the Company’s customers are independently rated, these ratings are used. Otherwise, if there is no independent rating, the Company assesses the credit quality of the customer taking into account its financial position, past experience and other factors. The Company may seek cash collateral, letter of credit or parent company guarantees, as considered appropriate.

As of December 31, 2025 and 2024, current and non-current trade receivables, net of impairment of financial assets, amounted to:

  
2025
  
2024
 
Current trade receivables
  
206,862,154
   
205,634,711
 
Impairment of financial assets (1)
  
(10,247,410
)
  
(396,975
)
Total
  
196,614,744
   
205,237,736
 
  (1)
Said amount represents the best estimate made by tgs according to what is stated in Note 8.b).

F - 56
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Likewise, as of December 31, 2025 and 2024, the Company has credits for government grants for Ps. 12,720,094 and Ps. 14,314,749, respectively.

In the ordinary course of business, the Company provides natural gas transportation services mainly to natural gas distribution companies, CAMMESA and Pampa Energía. The amounts of revenues made to the principal customers to which Natural Gas Transportation services were provided in the years ended December 31, 2025, 2024 and 2023 and the revenues receivable balances (net of impairment of financial assets) as of December 31, 2025 and 2024 are set forth below:

  
2025
  
2024
  
2023
 
  
Revenues
  
Trade
Receivables
  
Revenues
  
Trade
Receivables
  
Revenues
 
MetroGAS
  
174,485,552
   
15,987,485
   
149,464,905
   
17,145,789
   
69,663,523
 
Camuzzi Gas Pampeana S.A.
  
128,717,014
   
11,886,991
   
110,945,340
   
12,782,415
   
51,765,249
 
Naturgy Argentina
  
105,363,391
   
10,241,960
   
90,476,927
   
11,097,891
   
42,146,510
 
CAMMESA
  
65,037,667
   
11,885,509
   
46,592,370
   
12,120,584
   
25,344,626
 
Pampa Energía
  
29,318,365
   
2,854,550
   
22,477,232
   
2,965,064
   
9,913,962
 
Camuzzi Gas del Sur S.A.
  
37,785,765
   
2,936,532
   
26,910,481
   
3,078,007
   
12,854,559
 

The amounts of Liquids Production and Commercialization revenues made to major customers during the years ended December 31, 2025, 2024 and 2023 and revenues receivable balances (net of impairment of financial assets) as of December 31, 2025 and 2024 are set forth below:

  
2025
  
2024
  
2023
 
  
Revenues
  
Trade
Receivables
  
Revenues
  
Trade
Receivables
  
Revenues
 
PBB Polisur
  
181,608,852
   
19,963,245
   
179,958,689
   
18,114,784
   
289,396,014
 
Geogas Trading S.A.
  
18,429,853
   
-
   
31,755,687
   
-
   
23,856,580
 
YPF
  
11,145,095
   
232,102
   
20,293,196
   
1,541,167
   
13,932,972
 
Petrobras Global Trading BV
  
24,475,284
   
12,881,086
   
11,066,646
   
-
   
5,462,983
 
Trafigura Beheer
  72,487,009
   10,526,686
   102,499,183
   7,254,443
   118,437,631
 
Pampa Energía
  14,755,983   798,214   21,178,139   3,127,822   24,652,572 

The amounts of Midstream revenues made to major customers during the years ended December 31, 2025, 2024 and 2023 and revenues receivable balances (net of impairment of financial assets) as of December 31, 2025 and 2024 are set forth below:

 
 
2025
  
2024
  
2023
 
 
 
Revenues
  
Trade
Receivables
  
Revenues
  
Trade
Receivables
  
Revenues
 
Tecpetrol
  
31,734,016
   
6,164,032
   
27,267,816
   
5,117,874
   
33,267,404
 
Exxomobil Exploration
  
14,435,528
   
1,434,679
   
14,679,462
   
2,020,988
   
15,242,302
 
YPF
  
30,676,682
   
14,431,274
   
33,309,421
   
6,769,190
   
37,031,534
 
Vista Energy
  
9,863,658
   
1,528,803
   
10,330,411
   
2,011,121
   
5,900,375
 
Pluspetrol
  
58,626,600
   
6,621,468
   
51,352,203
   
9,263,706
   
35,415,185
 
Pampa Energía
  
95,856,234
   
22,251,107
   
65,242,027
   
11,239,896
   
50,511,084
 

The amounts of Telecommunication revenues made to major customers during the years ended December 31, 2025, 2024 and 2023 and revenues receivable balances (net of impairment of financial assets) as of December 31, 2025 and 2024 are set forth below:

F - 57
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
 
 
2025
  
2024
  
2023
 
 
 
Revenues
  
Trade
Receivables
  
Revenues
  
Trade
Receivables
  
Revenues
 
Pampa Energia
  
233,981
   
123,911
   
142,899
   
46,710
   
127,558
 
Global Crossing
  
1,014,153
   
294,073
   
1,201,102
   
97,854
   
1,185,906
 
Silica Networks
  
2,917,775
   
232,799
   
4,711,344
   
296,351
   
4,911,745
 
 

Cash and financial placements

The credit risk on cash and cash equivalents and other financial placements is limited since tgs has short-term fund placement policies whose main objective is to obtain an adequate return based on market characteristics and minimizing risk exposure. These placements are diversified in different financial institutions with adequate credit ratings in order to limit exposure to a few financial institutions. The Company’s maximum exposure to credit risk will be given by the carrying value of assets included in cash and cash equivalents and other financial assets measured at amortized cost.

Below is a detail of the maturities of the financial assets included in (i) cash and cash equivalents, (ii) other financial assets, (iii) trade receivables, and (iv) other receivables as of December 31, 2025 and 2024:

  December 31, 2025 
 
 
Cash and
cash
equivalents
  

Financial assets
  
Credits (1) (2)
 
Without specified maturity
  
804,106,528
   
648,152,264
   
78,137
 
With specified maturity
            
Overdue
            
Until el 12-31-2024
  
-
   
-
   
8,253,226
 
From 01-01-25 to 03-31-25
  
-
   
-
   
281,751
 
From 04-01-25 to 06-30-25
  
-
   
-
   
369,185
 
From 07-01-25 to 09-30-25
  
-
   
-
   
1,878,813
 
From 10-01-25 to 12-31-25
  
-
   
-
   
19,010,071
 
Total overdue
  
-
   
-
   
29,793,046
 
             
Non-due
            
From 01-01-26 to 03-31-26
  
-
   
355,915,568
   
190,141,790
 
From 04-01-26 to 06-30-26
  
-
   
-
   
2,105
 
From 07-01-26 to 09-30-26
  
-
   
-
   
82,464
 
From 10-01-26 to 12-31-26
  
-
   
-
   
29,094
 
During 2027
  
-
   
-
   
427,896
 
During 2028
  
-
   
-
   
-
 
During 2029
  
-
   
-
   
-
 
From 2030 onwards
  
-
   
-
   
-
 
             
Total non-due
  
-
   
355,915,568
   
190,683,349
 
Total with specified maturity
  
-
   
355,915,568
   
220,476,395
 
Total
  
804,106,528
   
1,004,067,832
   
220,554,532
 
 
(1)
The total amount of the receivables without specified maturity is recorded in Non-current assets.
 
(2)
Includes financial assets recorded in trade receivables and other receivables, excluding impairment of financial assets.

F - 58
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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  December 31, 2024 
  
Cash and cash
equivalents
  

Financial assets
  
Credits (1) (2)
 
Without specified maturity
  
78,894,638
   
611,643,130
   
37,773
 
With specified maturity
            
Overdue
            
Until 12-31-2023
  
-
   
-
   
4,305,119
 
From 01-01-24 to 03-31-24
  
-
   
-
   
-
 
From 04-01-24 to 06-30-24
  
-
   
-
   
-
 
From 07-01-24 to 09-30-24
  
-
   
-
   
428,240
 
From 10-01-24 to 12-31-24
  
-
   
-
   
27,141,386
 
Total overdue
  
-
   
-
   
31,874,745
 
             
Non-due
            
From 01-01-25 to 03-31-25
  
-
   
316,551,696
   
189,223,365
 
From 04-01-25 to 06-30-25
  
-
   
-
   
2,438
 
From 07-01-25 to 09-30-25
  
-
   
-
   
64,152
 
From 10-01-25 to 12-31-25
  
-
   
40,747,228
   
29,412
 
During 2026
  
-
   
-
   
562,892
 
During 2027
  
-
   
-
   
-
 
During 2028
  -   -   - 
From 2029 onwards
  
-
   
-
   
-
 
             
Total non-due
  
-
   
357,298,924
   
189,882,259
 
Total with specified maturity
  
-
   
357,298,924
   
221,757,004
 
Total
  
78,894,638
   
968,942,054
   
221,794,777
 
 
(1)
The total amount of the receivables without specified maturity is recorded in Non-current assets.
 
(2)
Includes financial assets recorded in trade receivables and other receivables, excluding impairment of financial assets.

16.1.5 Liquidity risk

This risk involves the difficulties that tgs may have in meeting its commercial and financial obligations. To this end, the expected cash flow is regularly monitored.

tgs has policies for borrowing funds whose main objective is to cover financing needs at the lowest cost according to market conditions. One of the Company’s main objectives is to have financial solvency. Given the current conditions of the financial market, the Company believes that the availability of resources and the positive cash flow from operations are sufficient to meet its current obligations, despite having credit lines for borrowing funds.

Additionally, a methodology is used for the analysis and assignment of credit limits to the different financial entities in order to minimize the associated liquidity risk. In line with this, the Company invests its liquid funds in financial entities with an adequate credit rating.

Below is a detail of the maturities of the Company’s financial liabilities corresponding to: commercial debts, remunerations, other debts and financial debts as of December 31, 2025 and 2024. The amounts presented in the tables represent contractual undiscounted cash flows and, therefore, do not correspond to the amounts presented in the statement of financial position. These estimates are made on the basis of information available at the end of each year and may not reflect actual amounts in the future. Therefore, the amounts shown are provided for illustrative purposes only:

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  December 31, 2025
 
 
 
Loans
  
Other financial
liabilities
  
Leases liabilities
 
Without specified maturity
  
-
   
-
   
-
 
With specified maturity
            
Overdue
            
Until el 12-31-2024
  
-
   
1,006,895
   
-
 
From 01-01-25 to 03-31-25
  
-
   
311
   
-
 
From 04-01-25 to 06-30-25
  
-
   
311
   
-
 
From 07-01-25 to 09-30-25
  
-
   
311
   
-
 
From 10-01-25 to 12-31-25
  
-
   
311
   
-
 
Total overdue
  
-
   
1,008,139
   
-
 
             
Non-due
            
From 01-01-26 to 03-31-26
  
235,315,531
   
121,996,995
   
4,108,469
 
From 04-01-26 to 06-30-26
  
30,218,128
   
1,054,603
   
3,010,842
 
From 07-01-26 to 09-30-26
  
30,300,375
   
-
   
1,348,371
 
From 10-01-26 to 12-31-26
  
30,218,128
   
-
   
289,452
 
During 2027
  
121,037,007
   
-
   
1,238,755
 
During 2028
  
168,894,100
   
-
   
-
 
From 2029 onwards
  
2,016,921,000
   
-
   
-
 
Total non-due
  
2,632,904,269
   
123,051,598
   
9,995,889
 
Total with specified maturity
  
2,632,904,269
   
124,059,737
   
9,995,889
 
Total
  
2,632,904,269
   
124,059,737
   
9,995,889
 

  December 31, 2024 
 
 
Loans
  
Other financial
liabilities
  
Leases liabilities
 
Without specified maturity
  
-
   
-
   
-
 
With specified maturity
            
Overdue
            
Until 12-31-2023
  
-
   
686,803
   
-
 
From 01-01-24 to 03-31-24
  
-
   
409
   
-
 
From 04-01-24 to 06-30-24
  
-
   
409
   
-
 
From 07-01-24 to 09-30-24
  
-
   
409
   
-
 
From 10-01-24 to 12-31-24
  
-
   
409
   
-
 
Total overdue
  
-
   
688,439
   
-
 
             
Non-due
            
From 01-01-25 to 03-31-25
  
66,093,990
   
155,790,491
   
2,794,252
 
From 04-01-25 to 06-30-25
  
29,347,029
   
1,227,672
   
2,794,252
 
From 07-01-25 to 09-30-25
  
28,271,670
   
-
   
2,794,252
 
From 10-01-25 to 12-31-25
  
-
   
-
   
2,794,252
 
During 2026
  
56,543,341
   
-
   
7,146,680
 
During 2027
  
56,543,341
   
-
   
1,140,305
 
From 2028 onwards
  
891,389,135
   
-
   
-
 
Total non-due
  
1,128,188,506
   
157,018,163
   
19,463,993
 
Total with specified maturity
  
1,128,188,506
   
157,706,602
   
19,463,993
 
Total
  
1,128,188,506
   
157,706,602
   
19,463,993
 

16.1.6 Capital management risk

The Company’s objectives in managing capital are to safeguard the Company’s ability to continue as a going concern, to achieve an optimal cost of capital structure and to support the investment process in order to provide returns to shareholders and benefits to other stakeholders.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
tgs seeks to maintain a level of cash generation from its operating activities that will enable it to meet all of its commitments.

The Company monitors capital on the basis of the leverage ratio. This ratio is calculated as total financial debt (including “current financial debt” and “non-current financial debt” as shown in the Statement of Financial Position) divided by total capital. Total capital is calculated as “Shareholders’ Equity”, as shown in the Statement of Changes in Shareholders’ Equity, plus total financial debt.

During the years ended December 31, 2025 and 2024, the gearing ratio was as follows:

 
 
2025
  
2024
 
Total debt (Note 13)
  
1,705,606,117
   
763,127,029
 
Total equity
  
3,127,865,472
   
2,938,157,586
 
Total capital
  
4,833,471,589
   
3,701,284,615
 
Gearing Ratio
  
0.35
   
0.21
 

16.2 Financial instruments by category and level of hierarchy

16.2.1 Categorization of financial instruments

Accounting policies for the categorization of financial instruments were explained in Note 4.e. In accordance with IFRS Accounting Standards 7 and 9, and IAS 32, non-financial assets and liabilities, such as contract and supplier liabilities, tax and social charges, income tax and deferred income tax are not included.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The categorization of financial assets and liabilities as of December 31, 2025 and 2024 is included below:

  
December 31, 2025
 
  
Financial assets
at fair value
  
Financial assets at
amortized cost
  
Total
 
CURRENT ASSETS
         
Trade receivables
  
-
   
196,614,744
   
196,614,744
 
Other receivables
  
-
   
13,270,484
   
13,270,484
 
Financial assets at amortized cost
  
-
   
355,915,568
   
355,915,568
 
Financial assets at fair value through profit or loss
  
648,152,264
   
-
   
648,152,264
 
Cash and cash equivalents
  
84,626,165
   
719,480,363
   
804,106,528
 
Total current assets
  
732,778,429
   
1,285,281,159
   
2,018,059,588
 
             
NON-CURRENT ASSETS
            
Other receivables
  
-
   
421,894
   
421,894
 
Total non-current assets
  
-
   
421,894
   
421,894
 
Total assets
  
732,778,429
   
1,285,703,053
   
2,018,481,482
 

  
Financial
liabilities at fair
value
  
Financial liabilities 
at amortized cost
  
Total
 
CURRENT LIABILITIES
         
Trade payables
  
-
   
100,455,959
   
100,455,959
 
Loans
  
-
   
244,877,733
   
244,877,733
 
Payroll and social security taxes payables
  
-
   
23,202,072
   
23,202,072
 
Other payables
  
-
   
346,889
   
346,889
 
Total current liabilities
  
-
   
368,882,653
   
368,882,653
 
             
NON-CURRENT LIABILITIES
            
Loans
  
-
   
1,460,728,384
   
1,460,728,384
 
Total non-current liabilities
  
-
   
1,460,728,384
   
1,460,728,384
 
Total liabilities
  
-
   
1,829,611,037
   
1,829,611,037
 

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  
December 31, 2024
 
  
Financial assets
at fair value
  
Financial assets at
amortized cost
  
Total
 
CURRENT ASSETS
         
Trade receivables
  
-
   
205,237,736
   
205,237,736
 
Other receivables
  
-
   
15,605,070
   
15,605,070
 
Financial assets at amortized cost
  
-
   
357,298,924
   
357,298,924
 
Financial assets at fair value through profit or loss
  
611,643,130
   
-
   
611,643,130
 
Cash and cash equivalents
  
23,306,406
   
55,588,232
   
78,894,638
 
Total current assets
  
634,949,536
   
633,729,962
   
1,268,679,498
 
             
NON-CURRENT ASSETS
            
Other receivables
  
-
   
554,996
   
554,996
 
Total non-current assets
  
-
   
554,996
   
554,996
 
Total assets
  
634,949,536
   
634,284,958
   
1,269,234,494
 

  
Financial
liabilities at fair
value
  
Financial liabilities
at amortized cost
  
Total
 
CURRENT LIABILITIES
         
Trade payables
  
-
   
100,927,529
   
100,927,529
 
Loans
  
-
   
103,129,469
   
103,129,469
 
Payroll and social security taxes payables
  
-
   
21,180,262
   
21,180,262
 
Other payables
  
-
   
320,957
   
320,957
 
Total current liabilities
  
-
   
225,558,217
   
225,558,217
 
             
NON-CURRENT LIABILITIES
            
Loans
  
-
   
659,997,560
   
659,997,560
 
Total non-current liabilities
  
-
   
659,997,560
   
659,997,560
 
Total liabilities
  
-
   
885,555,777
   
885,555,777
 

16.2.2 Fair value measurement hierarchy and estimates

According to IFRS 13, the fair value hierarchy introduces three levels of inputs based on the lowest level of input significant to the overall fair value. These levels are:

 •
Level 1: includes financial assets and liabilities whose fair values are estimated using quoted prices (unadjusted) in active markets for identical assets and liabilities. The instruments included in this level primarily include balances in mutual funds and public or private bonds listed on the Bolsas y Mercados Argentinos S.A. (“BYMA”). Mutual funds mainly invest in highly liquid instruments with low price risk.

 •
Level 2: includes financial assets and liabilities whose fair value is estimated using different assumptions quoted prices included within Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (for example, derived from prices). Within this level, the Company includes those derivate financial instruments for which it was not able to find an active market.

 •
Level 3: includes financial instruments for which the assumptions used in estimating fair value are not based on observable market information.

During 2025 and 2024, there were no transfers between the different hierarchies used to determine the fair value of the Company’s financial instruments or reclassifications between categories of financial instruments.

The tables below show different assets at their fair value classified by hierarchy as of December 31, 2025 and 2024:

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
  
As of December 31, 2025
 
  
Level 1
  
Level 2
  
Level 3
  
Total
 
Financial assets at fair value
            
Cash and cash equivalents
  
84,626,165
   
-
   
-
   
84,626,165
 
Financial assets at fair value through profit or loss
  
648,152,264
   
-
   
-
   
648,152,264
 
Total
  
732,778,429
   
-
   
-
   
732,778,429
 

  
As of December 31, 2024
 
  
Level 1
  
Level 2
  
Level 3
  
Total
 
Financial assets at fair value
            
Cash and cash equivalents
  
23,306,406
   
-
   
-
   
23,306,406
 
Financial assets at fair value through profit or loss
  
611,643,130
   
-
   
-
   
611,643,130
 
Total
  
634,949,536
   
-
   
-
   
634,949,536
 


The fair value amount of the financial assets is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.

As of December 31, 2025, the carrying amount of certain financial instruments used by the Company, in cash, cash equivalents, other investments, accounts receivable and payable and short-term obligations is representative of fair value due to the short-term nature of these instruments.

The estimated fair value of Non-current loans is estimated based on quoted market prices. The following table reflects the carrying amount and estimated fair value of the 2031 Notes and 2035 Notes at December 31, 2025, based on their quoted market price:

  
As of December 31, 2025
 
  
Carrying amount
  
Fair value
 
2031 Notes
  
725,337,862
   
741,824,475
 
2035 Notes
  713,835,319   720,297,750 

17.
REGULATORY FRAMEWORK

 
a.
Regulatory framework of the Natural Gas Transportation Segment

General Aspects

Regardingtgs’ Natural Gas Transportation business, it is regulated by Law No. 24,076 (“the Natural Gas Act”), its regulatory Decree No. 1,738/92 and the Regulatory framework for the transportation and distribution of natural gas in Argentina. The Natural Gas Act created ENARGAS, which is entitled, among other things, to set the basis for the calculation, monitoring, approval of tariffs and the power to verify compliance with the Natural Gas Law and its regulations. On January 28, 2016, Resolution No. 7 of the Ministry of Energy and Mining (“MINEM”) of Argentina repealed the Resolution 2000/2005 of the former Ministry of Federal Planning, Public Investment and Services (“ex MPFIPyS”) which provided that all tariff increases should have the prior intervention of the Undersecretary of Coordination and Management Control.

tgs' License has been granted for an original period of 35 years beginning on December 28, 1992. However, the Natural Gas Act provides that tgs may apply to ENARGAS for a renewal of its license for an additional period of ten years. ENARGAS should evaluate at that time the performance of tgs and raise a recommendation to the Executive Branch. At the end of the period of validity of the license, 35 or 45, as appropriate, the Natural Gas Act requires a call for a new tender for the granting of a new license, in which tgs, provided the Company fulfilled substantially with the obligations resulting from the license, would have the option of matching the best offer that the Government received in this bidding process.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
On September 8, 2023, the Company submitted to ENARGAS a request to initiate the procedure established in Article 6 of the Natural Gas Law in order to renew the License for providing the public natural gas transportation service. On June 13, 2024, ENARGAS issued a technical and legal report concluding that the Company had fully complied with its obligations, which enabled the holding of the non-binding public hearing on October 21, 2024 and the subsequent recommendation to the National Executive Branch (NEB). As a result, on July 24, 2025, through Decree No. 495/2025, the NEB granted an extension of the License for an additional 20-year period, effective as of December 28, 2027.

Tariff situation

Prior the enactment of the Public Emergency Law, and according to the Regulatory Framework, transportation tariffs were to be calculated in US dollars and converted into Argentine pesos at the time the customer was billed using the exchange rate prevailing at the date of the billing. The basic natural gas transportation tariffs charged by tgs had been established at the time of the privatization of GdE and were to be adjusted, subject to prior authorization, in the following cases: (i) semi-annually to reflect changes in the US producer price index (“PPI”) and (ii) every five years according to efficiency and investment factors determined by ENARGAS. The “efficiency factor” was a reduction to the base tariff resulting from future efficiency programs while the “investment factor” increased the tariffs to compensate the licensees for future investments which were not repaid through tariffs. Also, subject to ENARGAS approval, tariffs were to be adjusted to reflect non-recurrent circumstances or tax changes, other than income tax.

Following the enactment of the Public Emergency Law, the adjustment clauses for tariffs based on the value of the US dollar and those based on foreign price indexes, as well as any other indexing mechanism, were eliminated. Additionally, the law established an exchange rate of oneArgentine peso equal to one US dollar for tariffs and granted the Executive Branch power to renegotiate public service contracts with the licensee companies according to certain criteria established therein. The law, after successive extensions, expired on December 31, 2017.

Between July 2003 and March 2018, the Company received a series of temporary tariff increases under the framework of the Integral Tariff Review (“RTI” for its acronym in Spanish) process initiated after the Public Emergency Law was passed.

After being approved by the various intervening government agencies and the National Congress, the 2017 Integral Agreement signed on March 30, 2017 was ratified on March 27, 2018, through Decree No. 250/2018 (the “Decree 250”) of the Executive Branch. This decree represents the conclusion of the RTI process and the completion of the 2017 Transitional Agreement, and thus, the final renegotiation of the license after seventeen years of negotiations.

The 2017 Integral Agreement sets the guidelines for the provision of the natural gas transportation service until the end of the License. Among these guidelines:


•
The RTI Process, which will culminate in the signing of the integral agreement, was approved. As a result of this RTI, a new tariff schedule was also approved. This new tariff schedule applicable to the Company determined a total tariff increase of 214.2% and 37%, in the event that it had been granted in a single installment as of April 1, 2017, on the tariff of the natural gas transportation service and the CAU, respectively.


•
A Five-Year Investment Plan is approved. Resolution 4362 obliged tgs for the execution of the Five-Year Plan, which requires a high level of essential investments for the operation and maintenance of the pipeline system, to provide quality, safe and reliable service. The Five-YearPlan shall be for the period from April 1, 2017 to March 31, 2022 and will amount to Ps. 6,786,543, expressed in December 31, 2016 currency terms.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

•
A non-automatic six-month adjustment mechanism for the natural gas transportation tariff and the investment commitments were approved. This adjustment must be approved by ENARGAS and for its calculation, the evolution of the WPI published by INDEC will be considered.


•
tgs and its shareholders must withdraw any claim against the Government related to the natural gas transportation business, including the arbitration proceedings before the ICSID. The Company desisted from it on June 26, 2018.

Semi-annual tariff increase

Following the completion of the RTI in 2018, the Company was entitled to apply semiannual adjustments based on the variation of the WPI. However, this mechanism was affected by deferrals and freezes imposed by the National Government. At the public hearing held on September 4, 2018, tgs requested a 30% increase based on the WPI variation, but ENARGAS granted an adjustment of 19.7% (Resolution No. 265/2018), effective as from October 2018. Subsequently, in April 2019, an increase of 26% was approved (Resolution No. 192/2019), while accumulated inflation during that period exceeded 47%, evidencing a significant mismatch.

As from October 2019, adjustments were deferred (Resolution No. 521/2019) and ultimately suspended by the Solidarity Law and complementary decrees, initiating a renegotiation process that extended beyond the established deadlines. During this period, public hearings were held (March 2021, January 2022, and January 2023), and transitional tariff regimes (RTT) were implemented, with limited increases compared to inflation: 60% in March 2022 and 95% in April 2023, while accumulated inflation between October 2019 and April 2023 exceeded 500%.

The failure to apply the semiannual adjustment methodology affected the economic and financial equation of the License and compelled the Company to file multiple administrative claims, including motions for reconsideration, challenges, and requests for compensation due to non-compliance with the regulatory framework. Furthermore, the resolutions issued imposed additional restrictions, such as the prohibition to distribute dividends without prior authorization, which limited corporate management. This context reflects the complexity of the regulatory process and its economic impact on investment planning and business sustainability.

Under Decrees 1020 and 815, on December 7, 2022, ENARGAS issued Resolution No. 523/2022 which called for a public hearing on January 4, 2023 to, among other issues, consider the transitory adjustment of tariffs for the public natural gas transportation service.
 
On March 16, 2023, the TGS Board of Directors approved the proposed addendum to the transitional renegotiation agreement (the "2023 Transition Agreement") sent by ENARGAS. This addendum was subsequently ratified by the PEN through Decree No. 250/2023 of April 29, 2023. Previously, on April 27, 2023, ENARGAS issued Resolution No. 186/2023 through which the new tables were published. current tariffs.

The 2023 Transition Agreement had similar conditions to the previous transitional agreements and included:

- As of April 29, 2023, a temporary rate increase of 95% on the natural gas transportation rate and the CAU.

- During its term, tgs could only distribute dividends after requesting authorization from ENARGAS, subject to the approval of the Ministry of Economy.

On December 14, 2023, through ENARGAS Resolution No. 704/2023, a public hearing was called to consider a transitional tariff adjustment. Subsequently, Decree No. 55/2023 declared the national energy sector emergency until December 31, 2024, which was extended on several occasions, postponing the completion of the Five-Year Tariff Review (5YTR) and providing for the intervention of ENARGAS as from January 1, 2024.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
As a result of the public hearing held on January 8, 2024, on March 26, 2024, the 2024 Transitional Agreement was executed between tgs and ENARGAS, establishing a temporary 675% increase in natural gas transportation tariffs, effective as from April 3, 2024, pursuant to Resolution No. 112/2024.

Furthermore, tariffs were to be adjusted monthly, starting in May 2024 and until the completion of the RTQ process, based on an index composed of: (i) 47% Wage Index – Registered Private Sector (INDEC), (ii) 27.2% WPI, and (iii) 25.8% Construction Cost Index – Materials Chapter (INDEC). This agreement also removed the previous restriction on dividend payments.

During the months of May to July 2024, ENARGAS notified tgs that it would postpone the implementation of the monthly tariff adjustment. Likewise, it notified that it would replace the monthly adjustment methodology mentioned above for the remainder of 2024. According to the ENARGAS notification, the monthly tariff increase would be based on the expected inflation to be estimated by the Ministry of Economy for said periods.

On July 1, ENARGAS once again informed the Company of the postponement of the monthly tariff increase, this time corresponding to the month of July, maintaining the tariff schedules in effect since April 3, 2024.

During the year 2024 and the completion of the 5YTR process in the first quarter of 2025, the Company received tariff increases of 675%, 4%, 1%, 2.7%, 3.5%, 3%, 2.5%, 1.5% and 1.7%, effective from April 3, August 1, September 2, October 1, November 4, December 4, 2024 and January 1, February 1, and March 1, 2025, respectively.

Completion of the 5YTR

It is worth noting that the operation of gas pipelines by tgs requires a high level of investment related to the quality, safety and reliability of the service. This is the reason why it is important to determine the tariff for the public service of natural gas transportation based on a prudent and efficient economic operation, which allows obtaining sufficient income for the provision of a sustainable, safe and reliable service.

In this regard, and within the framework of the RQT process, on January 14, 2025, ENARGAS, through Resolution No. 16/2025, published the call for the public hearing held on February 6, 2025, with the purpose of considering, among other issues, the RQT for gas transportation and distribution, and the periodic adjustment methodology for gas transportation and distribution tariffs.

At this hearing, tgs presented, among other aspects, its expenditure and investment plan for the five-yearperiod 2025-2029, the capital base, and the proposed WACC (9.98% real after taxes). Considering the tariff calculation methodology and the mentioned parameters, a tariff increase of 22.7% was requested compared to the tariffs in effect as of January 2025. Additionally, alternatives for the periodic tariff adjustment methodology were presented:

 
•
WPI, or
 
•
A polynomial formula composed of information published by INDEC:
 
o
30% WPI,
 
o
40% total registered wage index, and
 
o
30% construction cost index for materials.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
On April 30, 2025, ENARGAS published Resolution No. 256/2025, which sets forth the conditions of the 5YTR for the 2025–2030 period. The main aspects include:

 
•
Regulatory capital base: determined as of December 31, 2024.
 
•
Discount rate (WACC): 7.18% real after taxes.
 
•
Initial tariff increase: weighted average of 3.67%, subsequently adjusted to 4.74% to be applied in 31 equal and consecutive monthly installments starting in May 2025 (the “RTQ Increase”).
 
•
Five-Year Investment Plan: totaling $279,107,575 (at June 2024 currency), subject to ENARGAS oversight.
 
•
Regulated operating expenses: defined for the 2025–2030 period.

The resolution also provides that the mechanism for periodic tariff adjustments will be based on a formula that equally combines the CPI and the WPI, both published by INDEC. However, the formal approval of this methodology was postponed.

Subsequent Tariff Update

Under Decree No. 371/2025, the Secretariat of Energy was designated as the enforcement authority to introduce contractual or tariff modifications. In line with this, on June 4, 2025, Resolution No. 241/2025 was issued, providing for the periodic update of transportation tariffs on a monthly basis (the ‘Periodic Update’), replacing the previous semiannual scheme.

On June 5, 2025, the Company agreed to said resolution, and ENARGAS, through Resolution No. 350/2025, approved the methodology for calculating the periodic adjustment and the tariff schedules effective as from June 6, 2025, which incorporate a Periodic Update of 2.81% and the application of the 5YTR Increase.

On July 1, 2025, Resolution No. 421/2025 was published, granting a Periodic Update of 0.62% and the corresponding 5YTR Increase. On August 1, September 1, October 1, November 1, December 1, 2025 and January 1 and February 1, 2026, through Resolutions No. 539/2025, 622/2025, 732/2025, 812/2025, 907/2025, 1001/2025 and 32/2026 and , a Periodic Update of 1.63%, 2.38%, 2.49%, 2.89%, 1.71%, 2.03% and 2.63%, respectively, was granted together with the corresponding 5YTR Increase, effective as from those dates.

 
b)
General framework for non-regulated segments

Domestic market

The Liquids Production and Commercialization and Midstream segments are not subject to regulation by ENARGAS, and as it is provided in the Transfer Agreement, have separate accounting information. However, over recent years, the Argentine Government enacted regulations which significantly impacted on it.

In April 2005, Law No. 26,020 – ‘Regulatory Framework for the Liquefied Petroleum Gas Industry and Marketing’ (‘Law 26,020’) was enacted, defining the regulatory framework for the Liquefied Petroleum Gas (‘LPG’) industry and marketing. Under this regime, the Secretariat of Energy establishes rules to ensure domestic supply, including the determination of minimum volumes and the setting of sales prices for the local market.

Since 2015, the ‘Plan Hogar’ (Household Cylinder Program) has been in force, which set maximum reference prices and mandatory supply quotas for producers, initially with economic compensations that were eliminated in February 2019. During 2025, supply obligations at regulated prices remained in place, with cumulative increases of 41.42% between December 31, 2024, and December 31, 2025 (ENARGAS Resolutions No. 11 and No. 216), reaching a price of $593,952 per ton at year-end 2025.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
On January 24, 2025, the Secretariat of Energy issued Resolution No. 15/2025, effective as of that date, which:

i. eliminates the maximum sales price established for products supplied under the Household Cylinder Program (‘Plan Hogar’);

ii. sets as the price cap the export parity price published by the Secretariat of Energy under Law No. 26,020; and

iii. maintains the obligations to supply the domestic market but removes the previously required product contributions.

This amendment entails the release of the price under the Household Cylinder Program within the export parity limit, while maintaining the obligation to meet domestic demand.

Additionally, the Company participates in the Propane Gas Supply Agreement for Indiluted Propane Gas Distribution Networks (“Propane for Networks Agreement”) entered into with the Argentine Government and propane producing companies whereby it undertakes to supply propane to distributors and sub-distributors of indiluted propane gas through networks at a price lower than the market price, The Company receives an economic compensation for the lower revenues derived from the participation in this program, which is calculated as the difference between the agreed sales price and the reference export parity price determined by the Energy Secretariat.

Regarding the agreement valid until December 31, 2023, said document was signed on August 18, 2023, which was ratified by the Executive Branch by decree 496/2023 on October 2, 2023. During much of 2024, propane deliveries were made under the terms of the 2023 agreement, in accordance with an instruction from the SE. On November 6, 2024, tgs signed a new Propane Gas Supply Agreement for Undiluted Propane Gas Distribution Networks, valid until December 31, 2024. On September 22, 2025, the agreement was executed and remained in force until December 31, 2025.

As of December 31, 2025, the Argentine State owes tgs Ps. 12,720,094 for these concepts.

Foreign market

On September 3, 2018, the Executive Branch issued Decree No. 793/2018, which, between September 4, 2018 and December 31, 2020, sets an export duty of12% on the exported amount of propane, butane and natural gasoline. This withholding is capped at $4 for each dollar of the tax base or the official FOB price.

Subsequently, following the enactment of the Solidarity Law, a cap of 8% was established for the rate applicable to hydrocarbons as of December 23, 2019.

Presidential Decree No. 488/2020 regulated the applicable tax rate on exports of certain oil and gas products, including those products that we export, establishing a range between 0% and 8% depending on the “ICE Brent first line” barrel price. If the price is below US$ 45, the tax rate will be zero. On the other hand, if the price is equal to or higher than US$ 60, an 8% tax rate will be paid, being variable if the price is between US$ 45 and US$ 60. During 2025, the withholding tax rate was 8%.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Decree No. 2,067 / 08 (the “Decree”)

Through the Decree, the Executive Branch created a tariff charge to be paid by: (i) the users of regulated services of transportation and / or distribution, (ii) natural gas consumers receiving natural gas directly from producers without making use of transportation systems or natural gas distribution, (iii) the natural gas processing companies in order to finance the import of natural gas. The tariff charge sets forth in this decree finance the higher price of the natural gas imports required to compensate the injection of natural gas necessary to meet national requirements (the “Charge”). When the Charge was created, tgs paid it in accordance with the provisions of Resolution I-563/2008, at Ps. 0.0492/m3.

Since its creation, the Charge had been subsidized by the Federal Government on a selective basis, depending on the end‑use of the natural gas. In November 2011, ENARGAS, pursuant to a delegation from the Federal Executive Branch, issued Resolutions No. 1,982/11 and 1,991/11 (the “Resolutions”), which amended both the list of beneficiaries of the subsidy and the amount of such subsidy. These changes resulted in an increase in the Charge for many of our customers and even for certain own‑use natural gas consumptions of TGS. As a result, the Charge applicable to the Company increased from Ps. 0.0492 to Ps. 0.405 per m³ consumed, effective December 1, 2011, representing a significant increase in the variable costs associated with natural gas processing activities carried out on the Company’s own behalf.

In order to avoid this damage, tgs appealed against the Presidential Decree and the Resolutions including National Government, ENARGAS and ex MPFIPyS as defendants.

For further information regarding the legal action filed the Company, see Note 20.a).

On March 28, 2016, the former Ministry of Energy and Mining (“MINEM”) issued Resolution No. 28/2016, which, in its Article 7, repealed—effective April 1, 2016—the administrative acts related to the determination of the Charge. However, this Resolution did not annul or declare unlawful the Decree and the Resolutions previously issued; therefore, the legal action initiated by the Company continues its course.

 
c)
Essential assets

A substantial portion of the assets transferred by GdE has been defined as essential for the performance of the natural gas transportation service. Therefore, tgs is required to keep separated and maintain these assets, together with any future improvements, in accordance with certain standards defined in the License.
tgs may not, for any reason, dispose of, encumber, lease, sublease or loan essential assets nor use such assets for purposes other than the provision of the licensed service without ENARGAS´s prior authorization. Any expansion or improvements that it makes to the gas pipeline system may only be encumbered to secure loans that have a term of more than one year to finance such extensions or improvements.

Upon expiration of the License, tgs will be required to transfer to the Argentine government or its designee, the essential assets listed in an updated inventory as of the expiration date, free of any debt, encumbrances or attachments. If the Company decides not to continue with the license, tgs will receive a compensation equal to the lower of the following two amounts:

 
i)
the net book value of the essential assets determined on the basis of the price paid by the acquiring joint arrangements, and the original cost of subsequent investments carried in US dollars and adjusted by the PPI, net of accumulated depreciation according to the calculation rules to be determined by ENARGAS; or

 
ii)
the net proceeds of a new competitive bidding (the “New Bidding”).

Once the period of the extension of the License expires, tgs will be entitled to participate in the New Bidding, and thus, it shall be entitled to:

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
 
i)
that its bid in the New Bidding be computed at an equal to the appraisal value to be determined by an investment bank selected by ENARGAS, which represents the value of the business of providing the licensed service as it is driven by the Licensee at the valuation date, as a going concern and without regard to the debts;

 
ii)
to obtain the new License, without payment, in the event that any bid submitted in the New Bidding exceeds the appraised value;

 
iii)
to match the best bid submitted by third parties in the New Bidding, if it would be higher than its bid mentioned in (i), paying the difference between both values ​​to obtain the new License;

 
iv)
if the Company is unwilling to match the best bid made by a third party, to receive the appraisal value mentioned in (i) as compensation for the transfer of the Essential Assets to the new licensee.

Dedicated Branch

On September 5, 2024, General Resolution No. 19/2024 of the General Inspectorate of Justice (“IGJ Resolution 19/2024”) was published in the Official Gazette of the Argentine Republic, by means of which the regulation of the so-called Dedicated Branches for the RIGI provided for in Law No. 27,742, under the terms of its article 170, is established. This regime is designed to attract and encourage large-scale investments, both domestic and foreign, with the aim of boosting the country's economic development.

The RIGI offers fiscal and legal incentives. These include:

 
•
Reduction in the income tax rate, from 35% of the current rate to 25% for the Dedicated Branch.
 
•
Accelerated amortization of assigned assets.
 
•
Early refund of VAT.
 
•
Calculation of 100% of the tax on bank debits and credits.

 
•
Customs and exchange benefits.


On December 2, 2024, the Executive Branch issued Decree No. 1060/2024 (the “Decree 1060”) declaring the private initiative presented by tgs to be of national public interest. This project aims to expand the Perito Moreno Gas Pipeline (formerly the Néstor Kirchner Gas Pipeline) through the construction of 3 new compressor plants and the upgrading of the Tratayén and Salliqueló compressor plants.


The aforementioned works to expand the Perito Moreno Gas Pipeline will be incorporated into the concession duly granted to IEASA, currently ENARSA, by Decree No. 76/2022.


The price of the transport capacity resulting from the expansion, to be paid to the successful bidder, will be the price resulting from the public tender. The law applicable to this work will be governed by the provisions of Law No. 17,319. The resulting incremental capacity may be marketed by the successful bidder to third parties.


Additionally, Decree 1060 includes the express commitment of tgs to carry out the expansion works that are necessary for the final sections of its licensed system, regardless of whether or not it is awarded the public tender to be carried out.


On January 31, 2025, PEN Decree No. 54/2025 established that the Private Initiative submitted by TGS shall be governed by the contracting system provided for in Article 6 of Decree No. 76 dated February 11, 2022, which stipulates that ENARSA, with the approval of the Ministry of Economy, may enter into freely negotiated contracts regarding transportation capacity with producers and/or shippers for the construction or expansion, in whole or in part, of the Perito Moreno Pipeline. Finally, on February 25, 2025, the Ministry of Economy issued Resolution No. 169/2025, delegating to the Secretariat of Energy and ENARSA the responsibility for carrying out the bidding process for the Private Initiative. This resolution also sets forth a series of guidelines that ENARSA must consider when preparing the bidding specifications.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
The project was declared to be of national public interest and authorized for bidding by ENARSA. Within this framework, on May 22, 2025, ENARSA launched National and International Public Tender GPM No. 01/2025, whose award to tgs was approved by the Secretariat of Energy on October 17, 2025.

On October 26, 2025, the Dedicated Branch submitted an application for adhesion to the RIGI.

Furthermore, tgs undertook the commitment to carry out a complementary expansion in the final sections of its licensed system, works necessary to achieve the objectives of the project.

The works are scheduled to be completed by April 30, 2027.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
18.
ASSETS AND LIABILITIES IN FOREIGN CURRENCY

Balances in foreign currencies as of December 31, 2025 and 2024 are detailed below:

 
2025
 
2024
 
 
Foreign currency
     Amount 
Foreign currency
  Amount 
 
and amount
  Exchange
rate
  
in local
 
and amount
  
in local
 

(in thousands)
    
currency
 
(in thousands)
  
currency
 
CURRENT ASSETS
                 
                  
Cash and cash equivalents
US$
  
493,773
   
1,446.00
(1) 
  
713,996,382
 
US$
  
40,373
   
54,650,546
 
                       
Financial assets at amortized cost US$  246,138   1,446.00(1)
  355,915,568 US$
  263,955   357,298,924 
                       
Financial assets at fair value through profit or loss (3)
US$
  
294,322
   
1,446.00
(1) 
  
425,589,243
 US$
  
319,182
   
432,056,876
 
                       
Trade receivables
US$
  
81,330
   
1,446.00
(1) 
  
117,603,180
 
US$
  
82,426
   
111,574,862
 
                       
Other receivablesUS$
  21   1,446.00
(1)
  30,366 US$  -   - 
                       
Total current assets
US$
  
1,115,584
       
1,613,134,739
 
US$
  
705,936
   
955,581,208
 
                       
TOTAL ASSETS
US$
  
1,115,584
       
1,613,134,739
 
US$
  
705,936
   
955,581,208
 
                       
CURRENT LIABILITIES
                      
                       
Trade payables
US$
  
35,531
   
1,455.00
(2) 
  
51,697,605
 
US$
  
37,510
   
50,922,946
 
  Euros  845   1,713.12(2)  1,447,586  Euros  794   1,122,114 
 SEK
  880   158.68(2)  139,638 SEK
  -   - 
                       
Loans
US$
  
168,301
   
1,455.00
(2) 
  
244,877,733
 
US$
  
75,965
   
103,129,469
 
                       
Total current liabilities
US$
  
203,832
       
296,575,338
 
US$
  
113,475
   
154,052,415
 
  Euros  845
       1,447,586  Euros  794   1,122,114 
 SEK
  880   
   139,638 SEK
  -   - 
                       
NON CURRENT LIABILITIES
                      
                       
Loans
US$
  
1,003,937
   
1,455.00
(2) 
  
1,460,728,384
 
US$
  
486,156
   
659,997,560
 
                       
Total non current liabilities
US$
  
1,003,937
       
1,460,728,384
 
US$
  
486,156
   
659,997,560
 
                       
TOTAL LIABILITIES
US$
  
1,207,769
       
1,757,303,722
 
US$
  
599,631
   
814,049,975
 
  Euros  845
       1,447,586  Euros  794   1,122,114 
 SEK
  880       139,638 SEK
  -   - 

(1)
Buy exchange rate at the end of fiscal year
(2)
Sell exchange rate at the end of fiscal year
(3)
Includes public and private debt bonds Dólar Linked for Ps. 268,728,844.

US$: United States of America dollars
SEK: Sweedish kronor

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
19.
COMMON STOCK AND DIVIDENDS

a)
Common stock structure and shares’ public offer

As of December 31, 2024 and 2023, tgs’ common stock was as follows:


 
Amount of common stock, subscribed, issued and authorized for
public offer
 
Common Shares Class         
(Face value $ 1, 1 vote)
 
Outstanding shares
  
Treasury Shares
  
Common Stock
 
Class “A”
  
405,192,594
   
-
   
405,192,594
 
Class “B”
  
347,568,464
   
41,734,225
   
389,302,689
 
Total
  
752,761,058
   
41,734,225
   
794,495,283
 

The Ordinary, Extraordinary, and Special Shareholders’ Meeting held on April 30, 2025 resolved, among other matters, to reduce the share capital by 41,734,225 Class B shares, each with a nominal value of $ 1and carrying one vote per share. This capital reduction was carried out through the cancellation of 41,734,225 treasury shares, with a nominal value of Ps. 41,734and an inflation adjustment of Ps. 53,821,656. The acquisition cost of the treasury shares amounted to Ps. 97,455,079. This transaction was accounted for as an equity transaction, resulting in an Additional paid-up capital of Ps. 43,591,689, which was recorded in the Company’s equity.

As of December 31, 2025, tgs’ common stock is as follows:


 
Amount of common stock, suscribed, issued and authorized for
public offer
 
Common Shares Class
    
(Face value $ 1, 1 vote)
  

 
Class “A”
   
405,192,594
 
Class “B”
   
347,568,464
 
Total
   
752,761,058
 

tgs’s shares are traded on the BYMA and under the form of the American Depositary Receipts (“ADSs”) (registered in the Securities and Exchange Commission (“SEC”) and representing 5 shares each) on the New York Stock Exchange.

b)
Acquisition of treasury shares

On March 6, 2020, the Company’s Board of Directors approved the sixth Program for the Acquisition of tgs treasury Shares in the markets where it makes a public offering of its shares (the “Sixth Repurchase Program”) for a maximum amount of Ps. 2,500 million (at the time of its creation).

Subsequently, on August 21, 2020, the Board of Directors approved a new Program for the Acquisition of tgs treasury Shares for a maximum amount to be invested in Ps. 3,000 million (at the time of its creation). This program was extended until March 22, 2021.

The acquisition cost of the treasury shares held in portfolio amounted to Ps. 97,455,079, as of December 31, 2024, which, together with the Treasury Share Trading Premium of Ps. 28,270,856, restricted-pursuant to Title IV, Chapter III, Sections 3.11.c and 3.11.e of the Regulations-the amount of realized and liquid earnings mentioned above that the Company was permitted to distribute.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
As mentioned above, the treasury shares acquired were cancelled on April 30, 2025.

As of December 31, 2025, the Additional paid-up capital amounted to Ps. 71,862,545, in accordance with the provisions of the Shareholders’ Meeting.

c)
Dividend distribution

Cash dividends

During the year ended December 31 2025, the Company paid cash dividends in the amount of Ps. 231,152,260 (Ps. 269.28 per share), which were authorized by the Ordinary, Extraordinary, and Special Shareholders’ Meeting held on April 30, 2025, and by the Company’s Board of Directors at its meeting held on May 28, 2025.

d)
Restrictions on distribution of retained earnings

Pursuant to the General Companies Act and CNV Rules, we are required to allocate a legal reserve (“Legal Reserve”) equal to at least 5% of each year’s net income (as long as there are no losses for prior fiscal years pending to be absorbed) until the aggregate amount of such reserve equals 20% of the sum of (i) “common stock nominal value” plus (ii) “inflation adjustment to common stock,” as shown in our consolidated statement of changes in equity.

Finally, and as mentioned in subsection b of this note, the amounts subject to distribution were restricted up to the acquisition cost of treasury shares and the paid-up capital as of December 31, 2024 and 2023.

20.
LEGAL CLAIMS AND OTHER MATTERS

a)
Action for annulment of ENARGAS Resolutions No. I-1,982/11 and No. I-1,991/11 (the “Resolutions”)

On April 12, 2012, tgs filed an action before the National Court of First Instance in Federal Administrative Litigation No. 1 (the ‘Court’) seeking (i) the declaration of unconstitutionality of Decree No. 2,067/2008 and ENARGAS Resolutions No. I-1,982/11 and No. I-1,991/11 (the ‘Resolutions’), and (ii) the annulment of any rule or act —issued or to be issued— based on said provisions, through which the charge to finance the importation of natural gas (the ‘Charge 2067’) was created and updated.

On July 5, 2012, the Court granted tgs a preliminary injunction ordering the suspension of Charge 2067 under the terms of the Resolutions. This measure, challenged by the National Government on several occasions, was initially granted for six months and subsequently renewed. On September 19, 2017, a new extension was granted, preventing the Government from claiming from tgs the amounts arising from the ‘new value of the Charge’ for the period November 2011–March 2016, extending its validity until March 2018 or until a final judgment, whichever occurred first. Subsequently, on October 29, 2019, the Court ordered another six-month extension, and on December 1, 2020, a further six-month extension was granted. In total, tgs obtained twelve extensions of the injunction. The last extension — dated December 1, 2020 and notified on December 4, 2020 — expired on July 1, 2021. tgsdid not request a new extension in light of the procedural stage of the appeal filed against the Court of Appeals’ judgment.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Resolution No. 28/2016 rendered ineffective the acts determining the value of Charge 2067; therefore, as from April 1, 2016, ENARGAS and the collecting agency ceased charging the increase established by the Resolutions.

On March 26, 2019, the Court issued a first-instance judgment declaring the unconstitutionality of Articles 53 and 54 of Law 26,784, Decree No. 2,067/2008, the Resolutions, and any act aimed at enforcing those provisions, and consequently their nullity. The National Government appealed on March 29, 2019; the appeal was granted on April 3, 2019.

The National Court of Appeals in Federal Administrative Litigation rejected the extraordinary appeal filed by the Argentine Federal Government, which sought to have tgs’s claim declared moot based on the ‘Alliance’ precedent (Argentine Supreme Court, December 2014). Subsequently, on May 14, 2021, Chamber I of the Court of Appeals (i) reversed the lower court’s decision and (ii) ruled that court costs be borne as incurred. tgs filed a federal extraordinary appeal on June 4, 2021; the Argentine Federal Government responded on June 16, 2021, and ENARGAS did so on June 24, 2021. The Court of Appeals granted the appeal on July 14, 2021, considering that the case involves the interpretation of federal regulations (Decree 2067/08; MINPLAN Resolution No. 1451/2008; ENARGAS Resolutions No. 1982/11 and No. 1991/11; and Sections 53 and 54 of Law 26,784).

Considering: (i) the precautionary measure issued and its twelve extensions; (ii) the favorable first-instance ruling; (iii) the existence of favorable precedents from the Supreme Court of Justice in similar cases (other natural gas processors); and (iv) the granted federal extraordinary appeal, Management, with the advice of its external counsel, believes that tgs has strong arguments and that a favorable resolution on the substantive matter is likely. Consequently, no provision has been recognized for the potential liability arising from the increase in Charge 2067 applicable to natural gas consumption related to the Cerri Complex during the period between the date the precautionary measure was obtained and April 1, 2016.

Regarding the last extension of the precautionary measure, which expired on July 1, 2021, TGS has not requested a new extension due to the early procedural stage of the appeal filed against the appellate court ruling. On December 16, 2024, the case file was forwarded to the Office of the Attorney General, with no updates received as of the date of issuance of these Consolidated Financial Statements.

Given the complex procedural instance, the nature of charge 2067, the background information presented in this and other legal cases initiated against charge 2067, at the date of the issuance of these Consolidated Financial Statements it is not possible to make a definitive quantification of the amount that should be pay tgs in the event of not obtaining a favorable ruling from the Supreme Court, while an eventual request for payment in the current circumstances may be challenged and questioned by tgs within the framework of the corresponding administrative and judicial instances, where the amount may be debated of the charge that is eventually required to tgs.

b)
Environmental matters

The Company is subject to extensive environmental regulations in Argentina. Management believes that its current operations are in material compliance with applicable environmental requirements, as currently interpreted and enforced. The Company has not incurred in any material environmental liabilities as a result of its operations to date. As of December 31, 2025 and 2024, the total amount of these provisions amounted Ps. 91,897 and Ps. 119,824, respectively.

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
c)
Others

In addition to the matters discussed above, the Company is a party to certain lawsuits and administrative proceedings which involve taxation, labor claims, social security, administrative and others arising in the ordinary course of business. The Company’s Management and its legal advisors estimate that the outcome of these differences will not have significant adverse effects on the Company’s financial position or results of operations. As of December 31, 2025 and 2024, the total amount of these provisions amounted Ps. 864,081 and Ps. 434,121, respectively.

21.
BALANCES AND TRANSACTIONS WITH RELATED COMPANIES

Technical, Financial and Operational Assistance Agreement

Pampa Energía is tgs’ technical operator, according to the approval of ENARGAS in June 2004, and subject to the terms and conditions of the Technical Assistance Agreement which provides that Pampa Energía is in charge of providing services related to the operation and maintenance of the natural gas transportation system and related facilities and equipment, to ensure that the performance of the system is in conformity with international standards and in compliance with certain environmental standards. For these services, the Company pays a monthly fee based on a percentage of the operating income of the Company.

The Ordinary and Extraordinary General Shareholders´ Meeting held on October 17, 2019 ratified the proposal approved by the Board of Directors at its meeting on September 17, 2019 made to Pampa Energía that implies an extension in the contract and a modification in the determination of the remuneration received by Pampa Energía.

Such modifications, without implying a modification in the scope of the tasks performed, mean a progressive reduction over the years in the remuneration that Pampa Energía will receive in its role of Technical Operator.

According to the modifications made, tgs will pay Pampa Energía the greater of: (i) an annual fixed sum of US$ 0.5 million or (ii) the variable compensation that arises from applying to comprehensive income before results and income taxes for the year but after deducting also the above fixed amount) the following scheme:

•
From 12/28/2019 to 12/27/2020: 6.5%
•
From 12/28/2020 to 12/27/2021: 6%
•
From 12/28/2021 to 12/27/2022: 5.5%
•
From 12/28/2022 to 12/27/2023: 5%
•
From 12/28/2023 to 12/27/2024 and onwards: 4.5%

Commercial transactions

In the normal course of its activity, tgs celebrated with Pampa Energía and other companies related to it, agreements to transfer natural gas and its richness. The price, which is denominated in US dollars, is determined according to common market practices.

In addition, in the normal course of business, tgs carries out liquid sales, natural gas transportation services and other services with its associated companies, Pampa Energía and related companies.

Lease agreement with Pampa Energía

As mentioned in Note 13 to these Consolidated Financial Statements, on August 11, 2016, the Company entered into a finance lease agreement with Pampa Energía (formerly Petrobras Argentina).

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TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Key management compensation

The accrued amounts corresponding to the compensation of the members of the Board of Directors, the Statutory Committee and the Executive Committee for the years ended December 31, 2025, 2024 and 2023 were Ps. 4,973,010, Ps. 4,659,399 and Ps. 4,512,420, respectively.

Balances and transactions with related parties

The detail of significant outstanding balances for transactions entered into by tgs and its related parties as of December 31, 2025 and 2024 is as follows:

  
2025
  
2024
 
Company
 
Accounts
receivable
  
Accounts
payable
  
Accounts
receivable
  
Accounts
payable
 
Company which exercises joint control on the controlling shareholder:            
Pampa Energía (1)
  
25,903,872
   
18,079,034
   
17,379,490
   
28,772,012
 
Associates with significant influence:
                
Link
  
48,050
   
-
   
38,932
   
-
 
TGU (liquidated)
  -   -   -   - 
Other related companies:
                
CT Barragan S.A.
  
34,330
   
-
   
40,526
   
-
 
SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A. (2)
  71,976,141   10,341,529   2,969,665   14,679,587 
Transener S.A.
  
68,585
   
32
   
63,964
   
-
 
Total
  
98,030,978
   
28,420,595
   
20,492,577
   
43,451,599
 

(1)
Accounts payable includes Ps. 7,423,443 and Ps. 15,180,809corresponding to the financial leasing recorded as “Loans” as of December 31, 2025 and 2024, respectively.
(2)
Accounts receivable as of December 31, 2025 and 2024 includes Ps. 71,941,018 and Ps. 2,789,309, respectively, recorded in “Other Credits”.

As of December 31, 2024, tgs had a balance of Ps. 26,930,001 corresponding to Dollar linked notes issued by CT Barragán S.A. and Pampa Energía. The book value of the notes is disclosed within the caption “Financial assets at fair value through profit or loss”.

The detail of significant transactions with related parties for the years ended December 31, 2025, 2024 and 2023 is as follows:

Year ended December 31, 2025:

  
Revenues
  
Costs
  
Financial results
  
 
Company
 
Natural Gas Transportation
  
Liquids Production
and
Commercialization
  Midstream   Telecommunications  
Gas purchase
and others
  
Compensation for
technical assistance
  
Revenues from
administrative
services and others
  
Interest
expense
  
Interest gain
/ Gain / (loss) on
fair value
  
Selling expenses
(1)
 
Controlling shareholder:
                              
CIESA
  
-
   
-
   
-
   -   
-
   
-
   
136
   
-
   
-
   
-
 
Company which exercises joint control on the controlling
shareholder:
                                        
Pampa Energía
  
29,318,365
   
14,755,983
   
95,856,234
   233,981   
44,632,804
   
32,931,332
   
-
   
911,655
   
-
   
-
 
Associates with significant influence:                                        
Link
  
-
   
-
   
394,520
   -   
-
   
-
   
-
   
-
   
-
   
-
 
Other related companies:
                                        
SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A.
  
-
   
-
   
-
   82,377   
-
   
-
   
-
   
-
   
-
   
-
 
Transener S.A.
  
-
   
-
   
339
   -   
-
   
-
   
-
   
-
   
-
   
-
 
CT Barragán S.A.
  
-
   
-
   
147,935
   -   
-
   
-
   
-
   
-
   
1,022,407
   
-
 
Fundación TGS
  
-
   
-
   
-
   -   
-
   
-
   
-
   
-
   
-
   
867,143
 
Total
  
29,318,365
   
14,755,983
   
96,399,028
   316,358   
44,632,804
   
32,931,332
   
136
   
911,655
   
1,022,407
   
867,143
 
(1) Corresponds to donations expenses.

Additionally, during the year ended December 31, 2025, the Company received from SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A., construction engineering services for Ps. 85,972,947which are activated within the balance of advances to suppliers.

F - 78
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
Year ended December 31, 2024:
 
   Revenues      
Costs
  
Financial results
    
Company
 
Natural Gas Transportation
  
Liquids Production
and
Commercialization
  Midstream   Telecommunications  
Gas purchase
and others
  
Compensation
for technical
assistance
  
Revenues from
administrative
services and others
  
Interest
expense
  
Interest gain
/ Gain / (loss) on
fair value
  
Selling expenses
(1)
 
Controlling shareholder:
                              
CIESA
  
-
   
-
   
-
   -   
-
   
-
   
191
   
-
   -   - 
Company which exercises joint control on the controlling
shareholder:
                                        
Pampa Energía
  
22,477,232
   
21,178,139
   
65,121,669
   142,899   
45,450,778
   
34,736,319
   
-
   
1,796,092
   -   - 
Associates with significant influence:
                                        
Link
  
-
   
-
   
397,531
   -   
-
   
-
   
-
   
-
   -   - 
Other related companies:
                                        
SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A.
  
-
   
-
   
135,502
   150,831   
-
   
-
   
-
   
-
   -   - 
Transener S.A.
  
-
   
-
   
495
   -   
-
   
-
   
-
   
-
   -   - 
CT Barragán S.A.
  
-
   
-
   
169,493
   -   
-
   
-
   
-
   
-
   1,031,832   - 
Comercializadora e Inversora S.A.
  
2,771,782
   
-
   
-
   -   
-
   
-
   
-
   
-
   -   - 
Fundación TGS
  
-
   
-
   
-
   -   
-
   
-
   
-
   
-
   -   711,475 
Total
  
25,249,014
   
21,178,139
   
65,824,690
   293,730   
45,450,778
   
34,736,319
   
191
   
1,796,092
   1,031,832   711,475 
(1) Corresponds to donations expenses.

Additionally, during the year ended December 31, 2024, the Company received from SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A., construction engineering services for Ps. 172,763,578 which are activated within the balance of advances to suppliers.

Year ended December 31, 2023:


  Revenues      
Costs
  
Financial results
    
Company
 
Natural Gas Transportation
  

Liquids Production
and
Commercialization
  Midstream  Telecommunications
  
Gas purchase
and others
  
Compensation for
 technical assistance
  
Revenues from
administrative
services and others
  
Interest
expense
  
Interest gain /
Gain / (loss) on
fair value
  
Selling expenses
(1)
 
Controlling shareholder:
                              
CIESA
  
-
   
-
   
-
   -   
-
   
-
   
627
   
-
   -   - 
Company which exercises joint control on the controlling
shareholder:
                                        
Pampa Energía
  
9,913,962
   
24,652,572
   
50,383,525
   127,559   
47,331,089
   
17,412,376
   
-
   
2,628,360
   -   - 
Associates with significant influence:
                                        
Link
  
-
   
-
   
404,491
   -   
-
   
-
   
-
   
-
   -   - 
Other related companies:
                                        
SACDE Sociedad Argentina de Construcción y Desarrollo Estratégico S.A.
  
-
   
-
   
-
   152,600   
-
   
-
   
-
   
-
   -   - 
Transener S.A.
  -   -   1,698   -   -   -   -   -   -   - 
CT Barragán S.A.
  
-
   
-
   
171,567
   -   
-
   
-
   
-
   
-
   19,509,101   - 
Comercializadora e Inversora S.A.
  
2,006,707
   
-
   
-
   -   
-
   
-
   
-
   
-
   -   - 
Fundación TGS
  
-
   
-
   
-
   -   
-
   
-
   
-
   
-
   -   405,223 
Total
  
11,920,669
   
24,652,572
   
50,961,281
   280,159   
47,331,089
   
17,412,376
   
627
   
2,628,360
   19,509,101   405,223 
(1) Corresponds to donations expenses.

22.
CONTRACTUAL OBLIGATIONS

a)
Contractual Commitments

As of December 31, 2025, the Company had the following contractual commitments:

  
Estimated maturity date
 
  
Total
  
Due less than
one year
  
As of
12/31/2026
  
From
01/01/2027 to
12/31/2027
  
From
01/01/2028 to
12/31/2028
  
From
01/01/2029 to
12/31/2029
  
From
12/31/2030
onwards
 
Financial indebtedness (1)
  
2,632,904,269
   
-
   
326,052,163
   
121,037,007
   
168,894,100
   
116,982,000
   1,899,938,999 
Purchase obligations (2)
  
71,231,759
   
-
   
64,251,467
   
5,791,595
   
1,188,697
   
-
   - 
Financial Leases
  
9,995,889
   
-
   
8,757,134
   
1,238,755
   
-
   
-
   - 
Total
  
2,714,131,917
   
-
   
399,060,764
   
128,067,357
   
170,082,797
   
116,982,000
   1,899,938,999 
(1)
Corresponds to the cancellation of principal and interest of the financial indebtedness. For further information, see Note 13.
(2)
Corresponds to purchase of natural gas contracts for the processing of liquids.

The totality of the financial indebtedness of tgs and the obligations corresponding to gas purchases are denominated in U.S. dollars which have been translated into Argentine pesos at the exchange rate as of December 31, 2025 (US$ 1.00 = Ps. 1,455.00). The amounts to be paid in pesos could vary depending on the actual fluctuations in the exchange rate.

For further information, see Note 17.a).

b)
Guarantees granted and goods for restricted availability

The Company has not granted any additional guarantees or goods of restricted availability other than those set out in the remaining notes.

F - 79
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)
23.
ASSOCIATES AND JOINT AGREEMENT

Associates with significant influence

Link:

Link was created in February 2001, with the purpose of the operation of a natural gas transportation system, which links TGS’s natural gas transportation system with the Cruz del Sur S.A. pipeline. The connection pipeline extends from Buchanan (Buenos Aires province), located in the high-pressure ring that surrounds the city of Buenos Aires, which is part of TGS’s pipeline system, to Punta Lara. tgs’s ownership interest in such company is 49%, while Pan American Sur S.A. holds a 20.40%, Shell Argentina S.A. a 25.50% and Wintershall Dea Argentina S.A. the remaining 5.10%.


TGU (liquidated):

TGU was a company incorporated in Uruguay. This company rendered operation and maintenance services to Gasoducto Cruz del Sur S.A. and its contract terminated in 2010. TGS held 49% of its common stock and Pampa Energía the remaining 51%.

On December 26, 2024, the TGU board decided to dissolve and liquidate said company.

EGS (liquidated):

In September 2003, EGS, a company registered in Argentina, was incorporated. The ownership was distributed between tgs (49%) and TGU (51%).

EGS owned a natural gas pipeline, which connects tgs’ main pipeline system in the Province of Santa Cruz with a delivery point on the border with Chile.

Since 2012 EGS discontinued its operations, deciding in January 2016 to begin the necessary steps to dissolve EGS. The Extraordinary Shareholders’ Meeting of EGS held on March 10, 2016, appointed the liquidator.

The EGS Liquidator Board held on March 31, 2023, reported the Final Distribution Project of the remainder of the liquidation. On June 26, 2023, the Extraordinary General Assembly of EGS approved the final liquidation balance for the irregular fiscal year closed on March 31, 2023 and approved the cancellation of the social registration of EGS before the General Inspection of Justice. As of the date of issuance of these consolidated financial statements, the distribution project was executed by the liquidator. As of the date of issuance of these Consolidated Financial Statements, the IGJ registered the liquidation and canceled it from the registry.

Joint Agreement

UT:

The Board of Directors of tgs approved the agreement to set up the UT together with SACDE. The objective of the UT is the assembly of pipes for the construction of the project of “Expansion of the System of Transportation and Distribution of Natural Gas” in the Province of Santa Fe, called by National Public Bid No. 452-0004-LPU17 by the MINEM (the “Work”).

On October 27, 2017, tgs - SACDE UT signed the corresponding work contract with the MINEM.

The UT will remain in force until its purpose has been fulfilled, i.e., once the works involved in the Project have been completed and until the end of the guarantee period, set at 18 months from the provisional reception.

F - 80
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

As a result of the situation of the economic context and the COVID mentioned in Note 1, the UT sent a letter to Integración Energética Argentina S.A. (“IEASA”), currently Energía Argentina S.A. (“ENARSA”), a company currently part of the Ministry of Productive Development, requesting, among other issues, the reestablishment of the economic-financial equation, readjustment of the work schedule, approval of cost redeterminations and price adjustments under the current legal regime.



On July 9, 2021, the UT and IEASA signed a restart order and a restart certificate for the works related to the Work, through which the work schedule was readjusted and IEASA also assumed the commitment to manage and join efforts to guarantee the cash flow in order to avoid new effects on the economic-financial structure of the contract for the Work, which would give rise to new requests -by the UT- for the recomposition of the economic-financial equation of the contract and the schedule of execution of the Work.


24.
CLIMATE EVENT AT GENERAL CERRI COMPLEX

On March 7, 2025, unprecedented heavy rainfall—the most extreme in the last 100 years—was recorded in the city of Bahía Blanca and adjacent areas, causing flooding across all urban and surrounding regions (the "Event").
 
The Event led to the overflow of the Saladillo García stream, which flooded the Cerri Complex, halting liquid production and partially affecting natural gas transportation services. It is also worth noting that the external electrical distribution system, as well as the Complex's electrical generation and distribution facilities, were affected.
 
The natural gas transportation service was gradually restored and is currently operating at full capacity, without any significant impact on the revenues of the Natural Gas Transportation business segment.
 
Regarding the Liquids Production and Commercialization segment, at the Cerri Complex, production was completely halted from March 7, 2025, until early May. Currently, the Cerri Complex is operating under normal conditions.
 
For the year ended December 31, 2025, the Company recorded a loss of Ps. 54,281,299, corresponding to expenses related to the event which is recorded under “Other operating results, net” in the Consolidated Statement of Comprehensive Income for the year ended on that date.
 
It is worth noting that the Company has coverage for property damage and business interruption, which is subject to the terms and conditions of insurance policies and applicable sublimits. The property damage deductible amounts to US$1 million, while the business interruption coverage includes a 60-day waiting period for the Liquids Production and Commercialization segment. While negotiations with insurance providers are ongoing and the final recovery amount and timing remain uncertain, as of December 31, 2025, we received Ps. 3,306,624 as advance payments against the final settlement of the claim, which is recorded under “Other operating results, net” in the Consolidated Statement of Comprehensive Income for the year ended on that date.

25.
SUBSEQUENT EVENTS


The financial statements were authorized for issuance by the Company’s Board of Directors on April 22, 2026. There are no subsequent events between the closing date of year ended December 31, 2025, and the approval (issuance) of these consolidated financial statements, other than the ones already disclosed therein.

F - 81
Table of Contents

TRANSPORTADORA DE GAS DEL SUR S.A.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AS OF
AS OF DECEMBER 31, 2025 AND COMPARATIVE INFORMATION
(Stated in thousands of pesos as described in Note 3 and 4.d., unless otherwise stated)

Telcosur’s financial debt

Upon its maturity date, on January 26, 2026, Telcosur settled the bank loan through the execution of tgs’s guarantee. Consequently, on that same date, a loan agreement was executed between tgs and Telcosur for an amount of US$ 24,691,237, maturing on January 25, 2027, and bearing a nominal annual interest rate of 6%.

Annual Ordinary Shareholders’ Meeting

Allocation of 2025’s net income and retained earnings.

On April 15, 2026, the Annual Ordinary Shareholders’ Meeting (the “2026 Shareholders´ Meeting”) approved the increase in the legal reserve of Ps. 23,030million and the allocation of Ps. 437,569 million to the reserve for capital expenditures, acquisition of treasury shares and/or dividends (the “Reserve”). The Board of Directors can release the Reserve to tgs´ shareholders for such purposes.

It is noteworthy that the above-mentioned decisions made by the 2026 Shareholders’ Meeting were taken considering current CNV regulations (Resolution No. 777/2018) which states retained earnings have to be adjusted by inflation using the rates as of the month before the meeting was held. In case of 2026 Shareholders’ Meeting, tgs used the inflation rate as of March 31, 2026.

F - 82

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