Castellum - 10-Q quarterly report FY

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q


x			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2026


o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___ to ___

Commission File Number: 001-41526

CASTELLUM, INC.

(Exact Name of Registrant as Specified in Charter)


NEVADA			27-4079982
(STATE OF INCORPORATION)			(I.R.S Employer I.D.)

1934 Old Gallows Road, Suite 350, Vienna, VA 22182

(703) 752-6157

(Address and telephone number of principal executive offices)

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


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.0001 per share	CTM	NYSE American LLC

Indicate by check mark whether the registrant (1) has filed 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 x 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 x No ¨

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


			Large accelerated filer o			Accelerated filer o
			Non-accelerated filer x			Smaller reporting company x
						Emerging growth company x

If an emerging growth company, 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 Exchange Act. x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.


Class			Outstanding as of May 7, 2026
Common Stock, par value $0.0001 per share			94,698,939

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CASTELLUM, INC.

FORM 10-Q

For the Quarter Ended March 31, 2026

INDEX

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Explanatory Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the “Securities Act,” and Section 21E of the Securities Exchange Act of 1934, as amended, or the “Exchange Act,” which statements involve substantial risks and uncertainties. These statements do not relate strictly to historical or current facts. Forward-looking statements involve risks and uncertainties and include statements regarding, among other things, our projected revenue growth and profitability, our growth strategies and opportunity, anticipated trends in our market and our anticipated needs for working capital. They are generally identifiable by use of the words “may,” “will,” “should,” “anticipate,” “estimate,” “plans,” “potential,” “projects,” “continuing,” “ongoing,” “expects,” “management believes,” “we believe,” “we intend,” or the negative of these words or other variations on these words or comparable terminology. In particular, these statements relate to future actions, prospective products and services, market acceptance, future performance or results of current and anticipated products and services, sales efforts, expenses, and the outcome of contingencies such as legal proceedings and financial results.

Examples of forward-looking statements in this Quarterly Report on Form 10-Q include, but are not limited to, our expectations regarding our business strategy, business prospects, operating results, operating expenses, working capital, liquidity, and capital expenditure requirements. Important assumptions relating to the forward-looking statements include, among others, assumptions regarding demand for our products and services, the cost, terms, and availability of components, pricing levels, the timing and cost of capital expenditures, competitive conditions, and general economic conditions. These statements are based on our management’s expectations, beliefs, and assumptions concerning future events affecting us, which in turn are based on currently available information. These assumptions could prove inaccurate. Although we believe that the estimates and projections reflected in the forward-looking statements are reasonable, our expectations may prove to be incorrect.

Important factors that could cause actual results to differ materially from the results and events anticipated or implied by such forward-looking statements include, but are not limited to:

•overall levels of government spending on defense spending and spending on IT services, significant delays or reductions in appropriations for our programs or U.S. government funding more broadly, including a prolonged continuing resolution, government shutdown, or breach of the debt ceiling, as well as the potential imposition of sequestration in the absence of an approved budget or continuing resolution;

•changes in political, economic, or regulatory conditions generally and in the markets in which we operate, and more specifically, the potential impact of the U.S. DOGE Service Temporary Organization on government spending and terminating contracts for convenience;

•potential future net income losses and growth trajectory;

•our ability to retain and attract senior management and other employees with suitable experience leading a public company;

•our ability to attract, retain, and develop highly qualified personnel who possess the necessary security clearances to support the specialized and sensitive nature of our work;

•our ability to raise additional capital on acceptable terms;

•our ongoing relationships with government entities, agencies, and teaming partners;

•our ability to win new contracts amidst increased levels of competition in contract bidding process;

•delays due to the appropriation process, change in the procurement process, and audits or cost adjustments to our contracts;

•our ability to successfully develop or commercialize new products and partner with companies that have complementary products and to successfully develop these offerings;

•our inability to receive full amounts authorized, or ongoing lack of funding, for contracts in our backlog;

•potential systems failures, security breaches, or the inability of Company employees to obtain required clearances;

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•our ability successfully to execute additional acquisitions and integrate those operations into our ongoing businesses; and

•the volatility of our common stock share price.

We operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for us to predict all of those risks, nor can we assess the impact of all of those risks on our business or the extent to which any factor may cause actual results to differ materially from those contained in any forward-looking statement. The forward-looking statements in this Quarterly Report on Form 10-Q are based on assumptions management believes are reasonable. However, due to the uncertainties associated with forward-looking statements, you should not place undue reliance on any forward-looking statements. Further, forward-looking statements speak only as of the date they are made, and unless required by law, we expressly disclaim any obligation or undertaking to publicly update any of them in light of new information, future events, or otherwise.

In this Quarterly Report on Form 10-Q, unless the context otherwise requires, all references to the “Company,” “our Company,” “we,” “our,” “us,” and “Castellum,” refer to Castellum, Inc., a Nevada corporation, and its wholly owned subsidiaries.

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Part I

Item 1. Unaudited Consolidated Financial Statements

Castellum, Inc. and Subsidiaries

Consolidated Balance Sheets

(Unaudited)


	March 31, 2026		December 31, 2025
	(unaudited)
Assets

Current Assets:
Cash	$	15,772,974	$	14,884,778

Accounts receivable, net	7,714,969		8,180,180
Contract asset	541,441		568,705
Due from buyer	57,049		58,207

Prepaid income taxes	146,245		153,153
Prepaid expenses and other current assets	764,894		800,671
Total current assets	24,997,572		24,645,694

Fixed assets, net	220,419		231,136

Non-Current Assets:
Due from buyer, net of current portion	44,371		77,259
Right of use asset - operating lease	718,137		800,069
Investment in joint ventures/captive insurance entity	100,250		100,250

Intangible assets, net	5,067,056		5,371,602
Goodwill	10,676,834		10,676,834
Total non-current assets	16,827,067		17,257,150

Total Assets	$	41,824,639	$	41,902,844

Liabilities and Stockholders' Equity

Liabilities

Current Liabilities
Accounts payable and accrued expenses	$	1,981,584	$	1,904,962
Accrued payroll and payroll related expenses	2,952,153		2,761,998
Current portion of lease liability – operating leases	251,073		270,868



Derivative liability	10,000		262,000

Notes payable, related party	—		400,000


Total current liabilities	5,194,810		5,599,828

Non-Current Liabilities

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Lease liability – operating leases, net of current portion	487,188		550,219





Total non-current liabilities	487,188		550,219

Total Liabilities	$	5,681,998	$	6,150,047

Stockholders' Equity
Preferred stock, 50,000,000 shares authorized
Series A Preferred stock, par value $0.0001; 10,000,000 shares authorized; 5,875,000 issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	588		588
Series C Preferred stock, par value $0.0001; 10,000,000 shares authorized; 570,000 and 570,000 issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	57		57
Common stock, par value, $0.0001, 3,000,000,000 shares authorized, 94,612,750 and 94,612,750 issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	9,461		9,461
Additional paid in capital	93,098,846		92,330,909
Accumulated deficit	(56,966,311)		(56,588,218)
Total stockholders' equity	36,142,641		35,752,797

Total Liabilities and Stockholders' Equity	$	41,824,639	$	41,902,844

See notes to unaudited consolidated financial statements.

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Castellum, Inc. and Subsidiaries

Consolidated Statements of Operations

(Unaudited)


	Three Months Ended March 31,
	2026		2025
Revenues	$	14,291,961	$	11,664,365

Cost of Revenues	9,229,741		7,109,749

Gross Profit	5,062,220		4,554,616

Operating Expenses
Indirect costs	2,461,140		2,385,544
Overhead	644,356		512,924
General and administrative	2,654,722		3,142,155


Total operating expenses	5,760,218		6,040,623

Loss From Operations Before Other Income	(697,998)		(1,486,007)

Other Income (Expense)


Gain from change in fair value of derivative liability	252,000		501,000


Interest income (expense), net	101,400		(110,764)


Total other income	353,400		390,236

Loss Before Income Taxes and Preferred Stock Dividends	(344,598)		(1,095,771)

Income tax benefit (expense)	(6,676)		(74,276)

Net Loss	(351,274)		(1,170,047)
Less: preferred stock dividends	26,819		26,984
Net Loss To Common Shareholders	$	(378,093)	$	(1,197,031)

Net Loss Per Share - Basic And Diluted	$	0.00	$	(0.01)

Weighted Average Shares Outstanding - Basic And Diluted	94,612,750		80,953,373

See notes to unaudited consolidated financial statements.

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Castellum, Inc. and Subsidiaries

Consolidated Statement of Changes in Stockholders' Equity

(Unaudited)


	Series A Preferred			Series B Preferred				Series C Preferred			Common Stock			Additional Paid-In Capital		Accumulated Deficit		Total
	Shares	Amount		Shares		Amount		Shares	Amount		Shares	Amount
Balance - December 31, 2024	5,875,000	$	588	—		$	—	770,000	$	77	77,076,129	$	7,707	$	74,256,138	$	(54,082,484)	$	20,182,026

Stock-based compensation - options	—	—		—		—		—	—		—	—		1,179,207		—		1,179,207
Stock options exercised	—	—		—		—		—	—		110,028	11		(11)		—		—
Sale of common stock, net of filing fees	—	—		—		—		—	—		4,500,000	450		3,995,478		—		3,995,928
Warrants exercised	—	—		—		—		—	—		4,225,717	423		1,936,178		—		1,936,601
Preferred stock conversion to common stock	—	—		—		—		(200,000)	(20)		125,000	13		8		—		1
Net loss for the period	—	—		—		—		—	—		—	—		—		(1,197,031)		(1,197,031)

Balance - March 31, 2025	5,875,000	$	588	—		$	—	570,000	$	57	86,036,874	$	8,604	$	81,366,998	$	(55,279,515)	$	26,096,732

Balance - December 31, 2025	5,875,000	$	588	—		$	—	570,000	$	57	94,612,750	$	9,461	$	92,330,909	$	(56,588,218)	$	35,752,797

Stock-based compensation - options	—	—		—		—		—	—		—	—		767,937		—		767,937
Net Income for the period	—	—		—		—		—	—		—	—		—		(378,093)		(378,093)

Balance - March 31, 2026	5,875,000	$	588	$	—	$	—	570,000	$	57	94,612,750	$	9,461	$	93,098,846	$	(56,966,311)	$	36,142,641

See notes to unaudited consolidated financial statements.

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Castellum, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

For the Three Months Ended March 31, 2026 and 2025

(Unaudited)


	2026		2025
Cash Flow From Operating Activities
Net loss before preferred stock dividends	$	(351,274)	$	(1,170,047)
Adjustments to reconcile net loss to net cash provided (used in) by operating activities:
Depreciation and amortization	324,990		378,187

Stock-based compensation	767,937		1,179,209



Lease cost	81,932		40,300



Change in fair value of derivative liability	(252,000)		(501,000)

Changes in assets and liabilities
Accounts receivable	465,211		(2,757,793)

Prepaid expenses and other current assets	42,685		154,263
Contract asset	27,263		(41,066)
Accounts payable and accrued expenses	266,779		253,387
Lease liability	(82,827)		(38,080)
Net cash provided by (used in) operating activities	1,290,696		(2,502,640)

Cash Flows From Investing Activities

Sale of subsidiary, cash received from buyer	34,046		4,435


Purchases of fixed assets	(9,727)		—

Net cash provided by investing activities	24,319		4,435

Cash Flows From Financing Activities
Payment of revolving line of credit	—		(1,999,944)


Payment of debt issuance costs	—		(12,844)
Proceeds from issuance of common stock, prefunded warrants and regular warrants, net of issuance costs	—		5,932,529

Preferred stock dividend	(26,819)		(26,984)


Repayment of amounts due to seller	—		(60,000)



Repayment of note payable - related party	(400,000)		—
Repayment of note payable	—		(300,000)
Net cash (used in) provided by financing activities	(426,819)		3,532,757

Net increase in cash	888,196		1,034,552

Cash - Beginning of Period	14,884,778		12,255,048

Cash - End of Period	$	15,772,974	$	13,289,600

Supplemental Disclosures
Cash paid for interest expense	$	2,301	$	195,843
Cash (refunded) paid from income taxes	$	(232)	$	3,200

See notes to unaudited consolidated financial statements.

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Castellum, Inc. and Subsidiaries

Notes to Consolidated Financial Statements (Unaudited)

March 31, 2026 and 2025

Note 1: Nature of Operations

Castellum, Inc. (the “Company”) is focused on building a large, successful technology company in the areas of information technology, electronic warfare, information warfare and cybersecurity with businesses in the governmental and commercial markets. Services include intelligence analysis, software development, software engineering, program management, strategic planning, information assurance and cybersecurity and policy along with analysis support. These services, which largely focus on securing data and establishing related policies, are applicable to customers in the federal government, financial services, healthcare, and other users of large data applications. The services can be delivered to legacy, customer owned networks, or customers who rely upon cloud-based infrastructures. The Company is actively working with business brokers and contacts within their business network to identify potential acquisitions.

Since November 2019, the Company has made the following acquisitions that specialize in the areas noted above:

•Corvus Consulting, LLC (“Corvus”),

•Mainnerve Federal Services, Inc. dba MFSI Government Group (“MFSI"),

•Merrison Technologies, LLC ("Merrison"),

•Specialty Systems, Inc. (“SSI”),

•the business assets of Pax River from The Albers Group (“Pax River”),

•Lexington Solutions Group, LLC (“LSG”), and

•Global Technology and Management Resources, Inc. ("GTMR").

With the exception of Pax River, all of these acquisitions were considered business combinations under Topic 805 Business Combinations of the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”). See Note 3, “Disposition” for detail on the disposition of MFSI in 2024.

Note 2: Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements, including the notes, include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). All intercompany balances and transactions have been eliminated in consolidation.

Basis of Presentation for Interim Periods

Certain information and footnote disclosures normally included for the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted for the interim periods presented. We believe that the unaudited interim financial statements include all adjustments (which are normal and recurring in nature) necessary to present fairly our financial position and the results of operations and cash flows for the periods presented.

The results of operations for the interim periods presented are not necessarily indicative of results that may be expected for the year or future periods. The financial statements should be read in conjunction with our audited consolidated financial statements and the notes thereto for the year ended December 31, 2025, included in our Annual Report on Form 10-K for the year then ended. We have continued to follow the accounting policies set forth in those financial statements.

Business Segments

Operating segments are defined as components of an enterprise 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, the Chief Executive Officer, reviews consolidated results of operations to make decisions. The Company maintains one operating and reportable segment, which is the delivery of products and services in the areas of information technology, electronic warfare, information warfare, and cybersecurity in the governmental and commercial markets.

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Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and 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. Actual results could differ from those estimates.

Revenue Recognition

The Company accounts for revenue in accordance with ASC 606, Revenue from Contracts with Customers ("ASC 606"). The Company accounts for a contract with a customer that is within the scope of this Topic only when the five steps of revenue recognition under ASC 606 are met. The five core principles will be evaluated for each service provided by the Company and is further supported by applicable guidance in ASC 606 to support the Company’s recognition of revenue.

Revenue is derived primarily from services provided to the Federal government. The Company enters into agreements with customers that create enforceable rights and obligations and for which it is probable that the Company will collect the consideration to which it will be entitled as services and solutions are transferred to the customer. The Company also evaluates whether two or more agreements should be accounted for as one single contract.

When determining the total transaction price, the Company identifies both fixed and variable consideration elements within the contract. The Company estimates variable consideration as the most likely amount to which the Company expects to be entitled, limited to the extent that it is probable that a significant reversal will not occur in a subsequent period.

At contract inception, the Company determines whether the goods or services to be provided are to be accounted for as a single performance obligation or as multiple performance obligations. For most contracts, the customers require the Company to perform several tasks in providing an integrated output and, hence, each of these contracts are deemed as having only one performance obligation. When contracts are separated into multiple performance obligations, the Company allocates the total transaction price to each performance obligation based on the estimated relative standalone selling prices of the promised services underlying each performance obligation.

This evaluation requires professional judgment, and it may impact the timing and pattern of revenue recognition. If multiple performance obligations are identified, the Company generally uses the cost plus a margin approach to determine the relative standalone selling price of each performance obligation. The Company does not assess whether a contract contains a significant financing component if the Company expects, at contract inception, that the period between when payment by the client and the transfer of promised services to the client occur will be less than one year.

The Company currently generates its revenue from three different types of contractual arrangements: cost plus fixed fee (“CPFF”), firm-fixed-price (“FFP”), and time-and-materials (“T&M”) contracts. The Company generally recognizes revenue over time as control is transferred to the customer, based on the extent of progress towards satisfaction of the performance obligation. The selection of the method used to measure progress requires judgment and is dependent on the contract type and the nature of the goods or services to be provided.

For CPFF contracts, the Company uses input progress measures to derive revenue based on hours worked on contract performance as follows: direct costs plus Defense Contract Audit Agency (“DCAA”) approved provisional burdens plus a fee. The provisional indirect rates are adjusted and billed at actual at year end. Revenue from FFP contracts is generally recognized ratably over the contract term, using a time-based measure of progress, even if billing is based on other metrics or milestones, including specific deliverables. Certain FFP contracts require the use of an input method based on estimated costs to complete. For T&M contracts, the Company uses input progress measures to estimate revenue earned based on hours worked on contract performance at negotiated billing rates, plus direct costs and indirect cost burdens associated with materials and the direct expenses incurred in performance of the contract.

These arrangements generally qualify for the “right-to-invoice” practical expedient where revenue is recognized in proportion to billable consideration. FFP level-of-effort contracts are substantially similar to T&M contracts except that the Company is required to deliver a specified level-of-effort over a stated period. For these contracts, the Company estimates revenue earned using contract hours worked at negotiated bill rates as the Company delivers the contractually required services.

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Revenue generated by contract support service contracts is recognized over time as services are provided, based on the transfer of control. Revenue generated by FFP contracts is recognized over time as performance obligations are satisfied. Most contracts do not contain variable consideration and contract modifications are generally minimal. For these reasons, there is not a significant impact of electing these transition practical expedients.

Revenue generated from contracts with Federal, state, and local governments is recorded over time, rather than at a point in time. Under contract support services contracts, the Company performs software design work as it is assigned by the customer, and bills the customer, generally semi-monthly, on either a CPFF or T&M basis, as labor hours are expended. Certain other government contracts for software development have specific deliverables and are structured as FFP contracts, which are generally billed as the performance obligations under the contract are met. Revenue recognition under FFP contracts requires judgment to allocate the transaction price to the performance obligations. Contracts may have terms of up to five years.

Contract accounting requires judgment relative to assessing risks and estimating contract revenue, as well as costs and assumptions for schedule and technical issues. Due to the size and nature of contracts, estimates of revenue and costs are subject to a number of variables. For contract change orders, claims, or similar items, judgment is required for estimating the amounts, assessing the potential for realization and determining whether realization is probable. Estimates of total contract revenue and costs are continuously monitored during the term of the contract and are subject to revision as the contract progresses. From time to time, facts develop that require revisions of revenue recognized or cost estimates. To the extent that a revised estimate affects the current or an earlier period, the cumulative effect of the revision is recognized in the period in which the facts requiring the revision become known.

The Company accounts for contract costs in accordance with the Accounting Standards Codification ("ASC") 340-40, Other Assets and Deferred Costs - Contracts with Customers. The Company recognizes the cost of sales of a contract as an expense when incurred or at the time a performance obligation is satisfied. The Company recognizes an asset from the costs to fulfill a contract only if the costs relate directly to a contract, the costs generate or enhance resources that will be used in satisfying a performance obligation in the future, and the costs are expected to be recovered. The incremental costs of obtaining a contract are capitalized unless the costs would have been incurred regardless of whether the contract was obtained.

The following table disaggregates the Company’s revenue by contract type for the three months ended March 31:


	2026		2025
Revenue:
Time and material	$	4,373,628	$	4,935,016
Firm fixed price	886,588		741,066
Cost plus fixed fee	9,031,745		5,988,283

Total	$	14,291,961	$	11,664,365

Accounting for Income Taxes

Income taxes are accounted for under the asset and liability method. We estimate our income taxes in each of the jurisdictions where the Company operates. This process involves estimating our current tax expense or benefit together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in our consolidated balance sheets. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. When assessing the realizability of deferred tax assets, we consider whether it is more likely than not that some or all of the deferred tax assets will not be realized. In making this assessment, we consider the availability of loss carryforwards, projected reversals of deferred tax liabilities, projected future taxable income, and ongoing prudent and feasible tax planning strategies.

We are subject to income taxes in the federal and state tax jurisdictions based upon our business operations in those jurisdictions. Significant judgment is required in evaluating uncertain tax positions. We record uncertain tax positions in accordance with ASC 740-10 on the basis of a two-step process whereby (1) we determine whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position, and (2) with respect to those tax

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positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is greater than 50% likely to be realized upon ultimate settlement with the related tax authority. Management evaluates its tax positions on a quarterly basis.

The Company files income tax returns in the U.S. federal tax jurisdiction and various state tax jurisdictions. The federal and state income tax returns of the Company are subject to examination by the Internal Revenue Service (“IRS”) and state taxing authorities, generally for three years after they were filed.

One Big Beautiful Bill Act On July 4, 2025, H.R.1, commonly referred to as the One Big Beautiful Bill Act ("OBBBA"), was enacted in the U.S. which includes a broad range of tax reform provisions, including extending and modifying certain key Tax Cuts and Jobs Act provisions (both domestic and international), and provisions allowing accelerated tax deductions for qualified property and research expenditures. The legislation has multiple effective dates, with certain provisions effective in 2025 and others to be implemented through 2027. The legislation's enactment did not materially impact our effective income tax rate or cash tax position.

The Company accounts for income taxes under ASC Topic 740, Income Taxes ("ASC 740"). ASC 740 requires the recognition of deferred tax assets and liabilities for both the expected impact of differences between the financial statement and tax basis of assets and liabilities and for the expected future tax benefit to be derived from tax loss and tax credit carry forwards. ASC 740 additionally requires a valuation allowance to be established when it is more likely than not that all or a portion of deferred tax assets will not be realized. ASC 740 clarifies the accounting for uncertainty in income taxes recognized in an entity's unaudited condensed financial statements and prescribes a recognition threshold and measurement process for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. Based on the Company's evaluation, it has been concluded that there are no significant uncertain tax positions requiring recognition in the Company's unaudited condensed financial statements.

Recent Accounting Pronouncements

In September 2025, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2025-06, which makes targeted updates to the accounting and disclosure requirements for internal-use software under Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40). The standard becomes effective for the Company beginning in fiscal year 2029, including interim periods, and permits either prospective or retrospective adoption. We are currently assessing the impact on our financial statements.

Other accounting standards updates adopted and/or issued, but not effective until after March 31, 2026, are not expected to have a material effect on the Company’s consolidated financial position, annual results of operations, and/or cash flows.

Note 3: Disposition

During 2024, the Company completed the following disposition to achieve its business purposes as discussed in Note 1.

MFSI

On September 11, 2024, the Company entered into a stock purchase agreement with Lead-Risk Millenia, LLC (the "Buyer") for the sale of its subsidiary, MFSI (the "MFSI Divestiture"). The stock purchase agreement, approved by the Board of Directors on September 13, 2024, was for the purchase and sale of 100% of the issued and outstanding stock of MFSI, which became effective on September 16, 2024. The stock purchase agreement required an initial cash payment of $15,000. Additionally, the Company will receive future consideration equal to 6% of all revenue generated by MFSI until September 30, 2029, or until total payments reach $705,000, whichever comes first. As part of the MFSI Divestiture, the Company retained all of MFSI's cash deposits and accounts receivable in excess of $150,000.

Management estimated the present value of future consideration to be received, recognizing short- and long-term components of a receivable, which we will accrete over time and reassess periodically. An 8.5% discount rate was applied to calculate the present value of the receivable, totaling $101,420 ("Anticipated Receivable"). The Anticipated Receivable is revalued each quarter. The Company recorded a gain of $39,234 from the MFSI Divestiture. The balance of the Anticipated Receivable, accounts receivable in excess of $150,000, and any payments made by the Company on behalf of the Buyer, are reflected in Due from Buyer on the Consolidated Balance Sheets.

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After considering qualitative and quantitative aspects of MFSI and its sale relative to the guidance of ASC 205-20, Presentation of Financial Statements - Discontinued Operations, Management concluded MFSI should not be reported or disclosed as a discontinued operation. Further, since MFSI represented less than 5% of the total revenue for the Company, it was deemed immaterial to the Company's financial statements, and as such, pro forma financial statements are not required.

Note 4: Fixed Assets

Fixed assets consisted of the following as of March 31, 2026, and December 31, 2025:


	March 31, 2026		December 31, 2025
Equipment and software	$	366,887	$	357,160
Furniture	43,119		43,119
Automobiles	56,020		56,020
Leasehold improvements	192,959		192,959
Total fixed assets	658,985		649,258
Accumulated depreciation	(438,566)		(418,122)
Fixed assets, net	$	220,419	$	231,136

Depreciation expense for the three months ended March 31, 2026 and March 31, 2025, was $20,444 and $22,650, respectively.

Note 5: Intangible Assets and Goodwill

Intangible assets consisted of the following as of March 31, 2026, and December 31, 2025:


		March 31, 2026		December 31, 2025
Customer relationships	4.5– 15 years	$	11,613,000	$	11,613,000
Tradename	15 years	783,000		783,000
Trademark	10-15 years	533,864		533,864
Backlog	2-5 years	3,210,000		3,210,000
Non-compete agreement	3-5 years	680,000		680,000
		16,819,864		16,819,864
Accumulated amortization		(11,752,808)		(11,448,262)
Intangible assets, net		$	5,067,056	$	5,371,602

The intangible assets with the exception of the trademarks were recorded as part of the acquisitions of Corvus, Merrison, SSI, LSG, and GTMR. Amortization expense for the three months ended March 31, 2026 was $304,546, and amortization expense for the three months ended March 31, 2025 was $355,537, respectively. The intangible assets are being amortized based on the estimated future lives as noted above.

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Future amortization of the intangible assets for the next five years as of March 31 is as follows:


Remainder of the year ending December 31, 2026	$	913,634
Year ending 2027	1,014,558
Year ending 2028	528,784
Year ending 2029	441,568
Year ending 2030	378,363
Year ending 2031 and thereafter	1,790,149
Total	$	5,067,056

The goodwill rollforward for the three months ended March 31, 2026, reflects no changes, as follows:


	Corvus		SSI		Total
December 31, 2025	$	1,958,741	$	8,718,093	$	10,676,834



March 31, 2026	$	1,958,741	$	8,718,093	$	10,676,834

When the Company acquires a controlling financial interest through a business combination, the Company uses the acquisition method of accounting to allocate the purchase consideration to the assets acquired and liabilities assumed, which are recorded at fair value. Any excess of purchase consideration over the net fair value of the net assets acquired is recognized as goodwill. There were no additions of goodwill for the three months ended March 31, 2026.

Note 6: Notes Payable

There were no notes payable activity during the three months ended March 31, 2026.

Interest expense for the three months ended March 31, 2026 and March 31, 2025 was $— and $153,808, respectively. There was no accrued interest on the notes payable as of March 31, 2026 and March 31, 2025.

Note 7: Note Payable – Related Party

The Company entered into a note payable with a related party in August 2021 with balances as of March 31, 2026 and December 31, 2025, as follows:


	March 31, 2026		December 31, 2025
Note payable at 5%, amended to mature on March 31, 2026	$	—	$	400,000

On February 11, 2026, the Company fully repaid the $400,000 note payable with the related party.

Interest expense for the three months ended March 31, 2026, was $2,301, and $4,932 for the three months ended March 31, 2025, respectively.

Note 8: Revolving Credit Facility

On April 4, 2022, the Company obtained a $950,000 revolving credit facility with Live Oak Banking Company (“Live Oak Bank”), maturing March 28, 2029. On February 22, 2024, the Company replaced this facility with a new $4,000,000 revolving credit facility maturing February 22, 2025 ("New Live Oak Revolver"). The outstanding balance of approximately $625,000 was rolled over, and an additional $904,793 was advanced. As of December 31, 2025, $0 was outstanding under the new facility.

Effective August 15, 2024, the Company amended the New Live Oak Revolver, requiring a $250,000 collateral account, increasing borrowing base reporting to twice monthly, and reducing borrowing capacity from $4,000,000 to $2,000,000.

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On February 13, 2025, the Company fully repaid the $1,999,944 balance plus interest, after which the line of credit was closed and the restricted cash released. No obligations remain under the facility.

Interest expense for the three months ended March 31, 2026 and 2025, was $— and $28,658, respectively.

Note 9: Due to Seller

As part of the acquisition of SSI (the "SSI Acquisition"), the Company was obligated to pay an earnout contingent on the results of operations of SSI through August 2023. On February 15, 2024, the Company entered into an agreement with the former shareholders of SSI concerning the amount and timing of the contingent earnout included in total consideration for the SSI Acquisition which closed in August 2021. The parties agreed to settle the amount for a total of $720,000, with an initial payment of $180,000 that was made by the Company at signing of the agreement, plus starting in March 2024, monthly payments of $20,000 plus interest payable at 5% per annum for 27 months. In November 2025, the balance was fully paid off.

Note 10: Stockholders’ Equity

Preferred Stock

The Company has 50,000,000 shares of preferred stock authorized. The Company has designated a Series A Preferred Stock, a Series B Preferred Stock, and a Series C Preferred Stock.

Series A Preferred Stock

The Company has designated 10,000,000 shares of Series A Preferred Stock, par value of $0.0001. As of March 31, 2026 and December 31, 2025, the Company has 5,875,000 shares of Series A Preferred Stock issued and outstanding, which is convertible into 587,500 shares of the Company's common stock.

For the three months ended March 31, 2026 and 2025, the Company recognized $18,269 and $18,269, respectively, in Series A dividends, all of which have been paid as of March 31, 2026.

Series B Preferred Stock

The Company has designated 10,000,000 shares of Series B Preferred Stock, par value of $0.0001. As of March 31, 2026 and December 31, 2025, the Company has 0 shares of Series B Preferred Stock issued and outstanding.

Series C Preferred Stock

The Company has designated 10,000,000 shares of Series C Preferred Stock, par value of $0.0001. As of March 31, 2026, the Company has 570,000 shares of Series C Preferred Stock issued and outstanding, which is convertible into 356,250 shares of the Company's common stock. As of December 31, 2025, the Company had 570,000 shares of Series C Preferred Stock issued and outstanding.

For the three months ended March 31, 2026 and 2025, the Company recognized $8,550 and $8,715 in Series C dividends, all of which have been paid as of March 31, 2026.

Common Stock

The Company has 3,000,000,000 shares of common stock, par value $0.0001 authorized. The Company had 94,612,750 shares issued and outstanding as of both March 31, 2026, and December 31, 2025.

On September 17, 2025, the Company filed a registration statement on Form S-8 (File No. 333-290331) to register an aggregate of 3,000,000 shares of the Company's common stock to be issued pursuant to the Castellum, Inc. 2025 Employee Stock Purchase Plan ("ESPP"). The ESPP was adopted by the Company’s Board of Directors on March 11, 2025 and approved by the Company’s stockholders at the annual meeting held on May 28, 2025. The ESPP is a voluntary employee benefit program that permits eligible employees to contribute up to 5% of their eligible compensation through payroll deductions each pay period. Payroll deductions and purchases of Company common stock under the ESPP did not commence until 2026. Shares are purchased on behalf of participating employees on a quarterly basis at a price equal to

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85% of the fair market value on the applicable purchase date. The ESPP is intended to provide employees with an opportunity to acquire an ownership interest in the Company and is not a component of executive compensation.

On September 17, 2025, the Company filed a registration statement on Form S-8 (File No. 333-290332) to register an aggregate of 9,000,000 shares of the Company's common stock to be issued pursuant to the Castellum, Inc. Second Amended 2021 Stock Incentive Plan.

On January 3, 2025, a member of the Company’s Board of Directors, exercised stock options at $0.210 per share for 110,028 shares of common stock. On August 21, 2025, a member of the Company's Board of Directors, exercised stock options at $0.210 per share for 125,000 shares of common stock.

In January 2025, two holders of the Company’s Series C Preferred Stock, converted 200,000 shares of Series C Preferred Stock into 125,000 shares of common stock at a conversion rate of 0.625 shares of common stock per share of Series C Preferred Stock.

On January 10, 2025, the Company filed a universal shelf registration on Form S-3 (File No. 333-284205), which was declared effective by the SEC on January 24, 2025, pursuant to which the Company may offer and sell up to $100,000,000 of equity and debt securities.

On February 12, 2025, an investor exercised an aggregate of 1,080,717 warrants to purchase 1,080,717 shares of the Company’s common stock which resulted in proceeds to the Company of $1. Prior to this exercise, the treatment of these warrants was evaluated under ASC 260-10, Earnings Per Share — Overall. Under this guidance, shares issuable for little or no cash consideration are considered outstanding common shares and are included in the computation of basic earnings per share from the date they are granted. Accordingly, the exercise of these warrants does not impact the Company's earnings per share calculation.

On March 19, 2025, the Company closed on the public offering (the "March 2025 Public Offering") of 4,500,000 units ("Unit(s)") at a public offering price of $1.00 per Unit. Each Unit consisted of one share of common stock and one warrant to purchase one share of common stock (the "March 2025 Warrants"). The March 2025 Warrants were immediately exercisable at $1.08 per share and expired 60 days from the date of issuance. The shares of common stock and March 2025 Warrants were immediately separable and issued separately. Gross proceeds from the March 2025 Public Offering were approximately $4.5 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the March 2025 Offering for working capital and general corporate purposes. 1,755,543 of the March 2025 Warrants issued were exercised at $1.08 per share, for gross proceeds of $1.90 million before deducting placement agent fees. The remaining 2,744,457 March 2025 Warrants expired on May 19, 2025.

On June 13, 2025, the Company closed on the June 2025 Public Offering of 4,166,667 units ("Unit(s)") at a public offering price of $1.20 per Unit. Each Unit consists of one share of common stock and one warrant to purchase one share of common stock. The June 2025 Warrants were immediately exercisable at $1.22 per share and expired 60 days from the date of issuance. The shares of common stock and June 2025 Warrants were immediately separable and issued separately. Gross proceeds from the June 2025 Public Offering were approximately $5.0 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the June 2025 Public Offering for working capital and general corporate purposes. 3,673,666 of the June 2025 Warrants issued were exercised at $1.22 per share, for gross proceeds of $4.48 million before deducting placement agent fees. The remaining 493,001 June 2025 Warrants expired on August 12, 2025.

During the three months ended March 31, 2026, no shares of common stock were issued.

Warrants

The Pre-funded Warrants were immediately exercisable and did not have an expiration date. As noted above, the Company sold Pre-funded Warrants to purchase up to an aggregate of 3,193,534 shares of common stock at an offering price of $0.319 per Pre-funded Warrant, which are exercisable at a price of $0.001 per share. As previously disclosed in the Annual Report on Form 10-K for the year ended December 31, 2025, all Pre-funded Warrants have been exercised.

The Regular Warrants became exercisable on March 20, 2024, upon effectiveness of shareholder approval which was obtained on February 12, 2024. The Regular Warrants had an original expiration date of March 20, 2029, and had an exercise price of $0.35 per share. 6,437,501 of the Regular Warrants were exercised in 2024. The remaining 2,000,000

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warrants were exercised in February of 2025 to purchase 2,000,000 shares of the Company’s common stock which resulted in aggregate proceeds to the Company of $700,000. All warrants held by this investor have now been fully exercised.

On February 12, 2025, an investor exercised an aggregate of 1,080,717 warrants to purchase 1,080,717 shares of the Company’s common stock which resulted in proceeds to the Company of $1. The treatment of these warrants was accessed under ASC 260-10, Earnings Per Share—Overall, where shares issuable for little or no cash consideration shall be considered outstanding common shares and are included in the computation of basic earnings per share since they were originally granted.

Of the 4,500,000 March 2025 Warrants issued during the March Public Offering, 1,755,543 warrants were exercised at $1.08 per share prior to March 31, 2026. The remaining 2,744,457 warrants expired on May 19, 2025.

Of the 4,166,667 June 2025 Warrants issued during the June 2025 Public Offering, 3,673,666 warrants were exercised at $1.22 per share prior to March 31, 2026. The remaining 493,001 warrants expired on August 12, 2025.

The following table represents a summary of warrants for the three months ended March 31, 2026 and the year ended December 31, 2025:


	Three Months Ended March 31, 2026				Year Ended December 31, 2025
	Number		Weighted Average Exercise Price		Number		Weighted Average Exercise Price
Beginning balance	5,653,981		$	1.40	8,744,698		$	1.40

Granted	—		—		8,666,667		0.34



Exercised	—		—		(8,509,926)		0.41





Expired	—		—		(3,247,458)		1.08
Ending balance	5,653,981		$	2.05	5,653,981		$	1.40

Warrants exercisable	5,653,981				5,653,981
Intrinsic value of warrants	$	—			$	—
Weighted Average Remaining Contractual Life (Years)	2.87				3.12

Options

On November 9, 2021, the Company approved the 2021 Stock Incentive Plan ("Stock Incentive Plan") that authorized the Company to issue up to 2,500,000 shares of common stock. Prior to this date, the granting of options was not done pursuant to the terms of a stock incentive plan. On November 9, 2023 the Board approved an amendment to the Stock Incentive Plan to increase the aggregate number of shares available for issuance from 2,500,000 to 6,000,000 (the "Amended Plan"), which was approved by the Company's shareholders at its annual meeting on May 29, 2024.

On March 11, 2025, the Board approved an amendment to the Amended Plan to further increase the aggregate number of shares available for issuance from 6,000,000 to 9,000,000 (the "Second Plan Amendment" and the "Second Amended Plan"), which was approved by the Company's stockholders at the Company's 2025 annual meeting of stockholders held on May 28, 2025. As of March, 31, 2026, 8,352,500 stock options have been granted under the Amended Plan.

The following represents a summary of options granted under the terms of the Amended Plan and additional options granted outside of the Amended Plan, for the three months ended March 31, 2026 and the year ended December 31, 2025:

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	Number	Weighted Average Exercise Price		Weighted-Average Remaining Contractual Term (in Years)	Weighted Average Fair Value
Outstanding December 31, 2025	13,352,500	$	1.81	4.67	$	2.64
Granted	—	—		0	—
Exercised	—	—		0	—
Forfeited	(282,500)	1.49		0	1.46
Outstanding March 31, 2026	13,070,000	$	1.82	4.45	$	2.70

As of March 31, 2026
Vested and exercisable	8,565,250	$	1.98	3.88	$	2.32

During the three months ended March 31, 2026, the Company recognized $767,937 of noncash stock-based compensation related to the vesting of service-based stock options. No options were exercised during the three months ended March 31, 2026.

The fair value of each option is estimated using the Black-Scholes valuation model. Changes to these inputs could produce a significantly higher or lower fair value measurement. The following assumptions were used for the year ended December 31, 2025, no options were granted during three months ended March 31, 2026:


									Year Ended December 31, 2025
Expected term									7 years
Expected volatility									123.05% – 124.33%
Expected dividend yield									—
Risk-free interest rate									3.90% - 4.14%

Note 11: Fair Value

Fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. U.S. GAAP sets forth a three-level fair value hierarchy, which prioritizes the inputs used in measuring fair value. The three levels are as follows:

Level 1 – defined as observable inputs, such as quoted market prices in active markets.

Level 2 – defined as inputs other than quoted prices in active markets that are either directly or indirectly observable.

Level 3 – defined as unobservable inputs in which little or no market data exists, therefore, requiring an entity to develop its own assumptions.

Our financial assets and liabilities subject to the three-level fair value hierarchy consist principally of cash, accounts receivable, accounts payable, contingent consideration, and derivative liabilities. The estimated fair value of cash and cash equivalents, accounts receivable, and accounts payable approximates their carrying value.

On April 4, 2022, the Company issued common stock, a convertible note, and warrants in a SPA with Crom (respectively, the "2022 Crom Note", the "2022 Crom Warrants, and the “2022 Crom SPA”). The Company had evaluated the conversion option liability in the 2022 Crom Note and the 2022 Crom Warrant to determine proper accounting treatment and determined them to be derivative liabilities (the "Derivative Liabilities").

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On February 13, 2023, the 2022 Crom SPA was terminated through an induced conversion thereby extinguishing the conversion option liability associated with the 2022 Crom Note; the 2022 Crom Warrants were not affected. The Derivative Liabilities in the tables below include the 2022 Crom Warrants. Refer to Note 10, “Stockholders’ Equity”, for more detail.

The Company recognized a liability for the estimated fair value of the 2022 Crom Warrants. The estimated fair value of the liability was calculated using a binomial pricing model with key input variables by an independent third party, as of the date of issuance, with changes in fair value recorded as gains or losses on revaluation in other income (expense). The Company determined that the significant inputs used to value the 2022 Crom Warrants fall within Level 3 of the fair value hierarchy.

In connection with the divestiture of MFSI , as discussed in Note 3, "Disposition", Management estimated the present value of future consideration to be received, using a probability-weighted analysis to determine the amount of the receivable and applying a discount rate that captures the risks associated with the duration of the consideration. The Company determined that the significant inputs used to value the Anticipated Receivable fall within Level 3 of the fair value hierarchy. The balance of the Anticipated Receivable is reflected in Due from Buyer on the Consolidated Balance Sheets.

The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:


	Fair Value Measurements at March 31, 2026
	Level 1		Level 2		Level 3		Total
Anticipated Receivable	$	—	$	—	$	101,420	$	101,420

2022 Crom Warrants	$	—	$	—	$	10,000	$	10,000


	Fair Value Measurements at December 31, 2025
	Level 1		Level 2		Level 3		Total
Anticipated Receivable	$	—	$	—	$	135,466	$	135,466

2022 Crom Warrants	$	—	$	—	$	262,000	$	262,000

Changes to these inputs could produce a significantly higher or lower fair value measurement. The fair value of the 2022 Crom Warrants is estimated using a binomial valuation model. The following assumptions were used for the period as follows:


	March 31, 2026
Expected term - warrants	1.01 years
Stock price as of measurement date	$	0.59
Volatility (observed)	68.40%
Incremental discount	5.0		%
Selected volatility – post haircut	72.4%
Risk-free interest rate	3.65%

Note 12: Defined Contribution Plan

The Company sponsors a qualified 401(k) plan that allows eligible employees to make contributions, subject to certain limitations. The Company provides a matching contribution of up to 4% of an employee's compensation. The aggregate 401(k) Plan employer match was $255,010, and $264,921 for the three months ending March 31, 2026 and March 31, 2025, respectively.

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Note 13: Concentrations

Concentration of Credit Risk. The Company’s customer base is concentrated with a relatively small number of customers. The Company does not generally require collateral or other security to support accounts receivable. To reduce credit risk, the Company performs ongoing credit evaluations on its customers’ financial condition. The Company establishes allowance for credit losses based upon factors surrounding the credit risk of customers, historical trends, and other information.

For the three months ended March 31, 2026 and 2025, the Company had three customers (all parts of the U.S. government) representing 71% and 63% of revenue earned, respectively. Any customer that represents 10% or greater of total revenue represents a risk. The Company also has three customers (all parts of the U.S. government) that represent 73% and 65% of the total accounts receivable as of March 31, 2026, and December 31, 2025, respectively.

Note 14: Income Taxes

The Company's quarterly provision for income taxes is measured using an estimated annual effective tax rate adjusted for discrete items that occur within the quarter. The effective income tax rate was (1.90)% and 6.80% for the three months ended March 31, 2026, and 2025, respectively. The effective tax for the three months ended March 31, 2026 was primarily due to nondeductible compensation and increase in valuation allowance offset by state taxes. The effective tax rate for the three months ended March 31, 2025 was primarily due to the nondeductible compensation and increase in valuation allowance offset by state taxes.

Note 15: Subsequent Events

Subsequent to March 31, 2026, and prior to the filing date of May 8, 2026, there were no subsequent events..

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations is provided to enhance the understanding of, and should be read together with, our financial statements and related notes included in our Annual Report on Form 10-K for fiscal year 2025 filed with the Securities and Exchange Commission ("SEC") on March 9, 2026 and elsewhere in this Quarterly Report on Form 10-Q, as applicable.

Business Overview

Castellum, Inc. is a technology and solutions company focused on leveraging the power of information technology to help solve the nation’s most pressing national security challenges. The Company provides clients in the United States (“U.S.") government (“USG”), financial services, legal, and other users of large data applications with services which include intelligence analysis, software development, software engineering, system modernization, program management, strategic and mission planning, information assurance, cybersecurity and policy support, data analytics, and model based systems engineering (“MBSE”). In addition to constantly innovating and enhancing our organic capabilities, Castellum is executing strategic acquisitions of technology companies in the areas of cybersecurity, information technology (“IT”), electronic warfare, information warfare, and information operations with businesses in the defense, federal, civilian, and commercial markets that share our passionate commitment to U.S. national security and have a history of bringing exceptional value to their clients. The Company is actively working with business brokers and contacts within their business network to identify potential acquisitions.

Recent Developments

On March 19, 2025, the Company closed on the public offering (the "March 2025 Public Offering") of 4,500,000 units ("Unit(s)") at a public offering price of $1.00 per Unit. Each Unit consisted of one share of common stock and one warrant to purchase one share of common stock (the "March 2025 Warrants"). The March 2025 Warrants were immediately exercisable at $1.08 per share and expired 60 days from the date of issuance. The shares of common stock and March 2025 Warrants were immediately separable and issued separately. Gross proceeds from the March 2025 Public Offering were approximately $4.5 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the March 2025 Public Offering for working capital and general corporate purposes.

Of the 4,500,000 March 2025 Warrants issued during the March 2025 Public Offering, 1,755,543 warrants were exercised at $1.08 per share for gross proceeds of $1.90 million before deducting placement agent fees. The remaining 2,744,457 warrants expired on May 19, 2025.

On June 13, 2025, the Company closed on the public offering (the "June 2025 Public Offering") of 4,166,667 units ("Unit(s)") at a public offering price of $1.20 per Unit. Each Unit consists of one share of common stock and one warrant to purchase one share of common stock (the "June 2025 Warrants"). The June 2025 Warrants are immediately exercisable at $1.22 per share and expired 60 days from the date of issuance. The shares of common stock and June 2025 Warrants were immediately separable and issued separately. Gross proceeds from the June 2025 Public Offering were approximately $5.0 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the June 2025 Public Offering for working capital and general corporate purposes.

Of the 4,166,667 June 2025 Warrants issued during the June Public Offering, 3,673,666 warrants were exercised at $1.22 per share for gross proceeds of $4.48 million before deducting placement agent fees. The remaining 493,001 warrants expired on August 12, 2025.

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Business Operations and Trends

We believe that the following trends and developments in the USG services industry and our markets may influence our future results of operations:

•budget deficits and the growing U.S. national debt increasing pressure on the USG to reduce federal spending across all federal agencies together with associated uncertainty about the size and timing of those reductions;

•cost-cutting and efficiency initiatives, current and future budget restrictions, and other efforts to reduce USG spending could cause clients to reduce or delay funding for orders for services or invest appropriated funds on a less consistent or rapid basis or not at all, particularly when considering long-term initiatives and in light of current uncertainty around Congressional efforts to craft a long-term agreement on the USG's ability to incur indebtedness in excess of its current limits, and generally in the current political environment, there is a risk that it will not issue task orders in sufficient volume to reach current contract ceilings, alter historical patterns of contract awards, including the typical increase in the award of task orders or completion of other contract actions by the USG in the period before the end of the USG's fiscal year on September 30, delay requests for new proposals and contract awards, rely on short-term extensions and funding of current contracts, or reduce staffing levels and hours of operation;

•government customers consolidation of smaller contract vehicles into larger contract vehicles could result in a lack of opportunity to re-compete for the existing business if the larger contract vehicle is not held by the Company;

•delays in the completion of USG’s budget processes for FY 2027, which has in the past and could in the future delay procurement of the products, services, and solutions we provide;

•changes in the relative mix of overall USG spending and areas of spending growth, with lower spending on homeland security, intelligence, defense-related programs as certain overseas operations end, and continued increased spending on cybersecurity, command, control, communications, computers, intelligence, surveillance, and reconnaissance, advanced analytics, technology integration, and healthcare, including as a result of the presidential and administration transition;

•consolidation of acquisition authority in areas directly related to the core business of the Company could limit access to new business and re-competing for existing business;

•increased inflationary pressure that could impact the cost of doing business and/or reduce customer buying power;

•risks related to a possible recession and volatility or instability of the global financial system, including bank failures and the resulting impact on counterparties and business conditions generally;

•legislative and regulatory changes, or shifts in regulatory priorities as a result of U.S. administration transitions, including limitations on the amount of allowable executive compensation permitted under flexibly priced contracts following implementation of interim rules adopted by federal agencies pursuant to the Bipartisan Budget Act of 2013, which substantially further reduce the amount of allowable executive compensation under these contracts and extend these limitations to a larger segment of our executives and our entire contract base;

•efforts by the USG to address organizational conflicts of interest and related issues and the impact of those efforts on us and our competitors;

•increased audit, review, and general scrutiny by USG agencies of government contractors' performance under USG contracts and compliance with the terms of those contracts and applicable laws;

•the inability of the government to make timely awards on contracts for which the Company has submitted proposals could affect the rate of revenue growth;

•USG agencies awarding contracts on a technically acceptable/lowest cost basis, which could have a negative impact on our ability to win certain contracts;

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•increased competition from other government contractors and market entrants seeking to take advantage of certain of the trends identified above, and an industry trend towards consolidation, which may result in the emergence of companies that are better able to compete against us;

•restrictions by the USG on the ability of federal agencies to use lead system integrators, in response to cost, schedule, and performance problems with large defense acquisition programs where contractors were performing the lead system integrator role; and

•increasingly complex requirements and enforcement and reporting landscapes of the Department of Defense including cybersecurity, managing federal health care cost growth, competition, and focus on reforming existing government regulation of various sectors of the economy, such as financial regulation and healthcare.

In the course of conducting our business operations, we are exposed to a variety of risks. Any of the risk factors we described in Part II, Item 1A. on this Quarterly Report on Form 10Q and Part I, Item 1A. of our Annual Report on Form 10-K for the year ended December 31, 2025 filed on March 9, 2026 have affected or could materially adversely affect our business, prospects, operating results, and financial condition.

Budgetary Environment

The U.S. continues to face an uncertain and evolving political, budgetary, and regulatory environment, making it difficult to predict the future course of defense budgets. Ongoing conflicts in Ukraine and the Middle East, threats in the Pacific region, macroeconomic pressures, the national debt, and competing domestic priorities will continue to shape our customers' budgets and spending decisions. Executive branch cost reduction initiatives and the administration's focus on government efficiency and contract management add further uncertainty, and we anticipate that debates over budgetary priorities, the debt ceiling, and discretionary spending constraints will remain significant, with potentially meaningful impacts on our programs and the Company.

Despite the uncertainty and while we believe the underlying budget environment remains supportive of defense and national security spending with backing from both sides of the aisle, the timing of appropriations bills remains unpredictable. When appropriations are not enacted, government agencies operate under continuing resolutions ("CRs"), temporary measures that fund operations at prior-year levels, which can negatively affect our business through delays in new program starts and contract award decisions. If a CR expires without a new CR or appropriations bill being signed into law, the government must shut down except in limited circumstances, and we continuously review our operations to identify programs at risk and develop appropriate contingency plans.

On May 2, 2025, President Trump submitted the Government Fiscal Year 2026 ("GFY26") Presidential Budget Request ("PBR") to Congress, holding defense spending flat at the Government Fiscal Year 2025 ("GFY25") enacted level of $893 billion. On July 4, 2025, President Trump signed the One Big Beautiful Bill Act ("OBBBA"), a reconciliation measure separate from standard government appropriations legislation that provides approximately $156 billion in additional defense funding above the PBR. These funds remain available in GFY26 and beyond regardless of whether normal appropriations or a CR is enacted, or even in the event of a government shutdown.

The U.S. government entered a shutdown on October 1, 2025, which ended on November 12, 2025, when President Trump signed a CR restoring federal operations at GFY25 funding levels through January 30, 2026. Following the expiration of that CR, a partial shutdown occurred until February 3, 2026, when President Trump signed five of the six remaining GFY26 full-year appropriations bills along with a two-week CR for the Department of Homeland Security (DHS). The enacted defense appropriations bill provided full-year DoD funding of $838.7 billion. On February 14, 2026, DHS funding lapsed and the department entered a shutdown; on April 30, 2026, the President signed a bipartisan bill ending the 75-day shutdown and funding most DHS operations through September 30, 2026. The Company currently does not maintain contracts with DHS.

The Company continues to monitor the evolving appropriations environment and assess potential effects on its programs, operations, and liquidity. A prolonged failure to resolve outstanding appropriations disputes is expected to have a negative impact on our business, financial condition, and operating results.

Basis of presentation

We have presented results of operations, including the related discussion and analysis, for the following periods:

•the three months ended March 31, 2026 compared to the three months ended March 31, 2025.

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Key Components of Revenue and Expenses

Revenues

Our revenues are primarily derived from services provided to the U.S. Federal, state, and local governments. We currently generate our revenue from three different types of contractual arrangements: Cost Plus Fixed Fee (“CPFF”), Fixed Firm Price (“FFP”), and Time and Materials (“T&M”) contracts. For CPFF contracts, the Company uses input progress measures to derive revenue based on hours worked on contract performance as follows: direct costs plus Defense Contract Audit Agency (“DCAA”) approved provisional burdens plus a fee. The provisional indirect rates are adjusted and billed at actual at year end. Revenue from FFP contracts is generally recognized ratably over the contract term, using a time-based measure of progress, even if billing is based on other metrics or milestones, including specific deliverables. Certain FFP contracts require the use of an input method based on estimated costs to complete. For T&M contracts, the Company uses input progress measures to estimate revenue earned based on hours worked on contract performance at negotiated billing rates, plus direct costs and indirect cost burdens associated with materials and the direct expenses incurred in performance of the contract.

Cost of Revenues

Cost of Revenues include direct costs incurred to provide goods and services related to contracts, specifically labor, contracted labor, materials, and other direct costs, which includes rent, insurance, and software licenses. Cost of Revenues related to contracts is recognized as an expense when incurred or at the time a performance obligation is satisfied.

Gross Profit and Gross Profit Margin

Our gross profit comprises our revenues less our cost of revenues. Gross profit margin is our gross profit divided by our revenues.

Operating Expenses

Our operating expenses include indirect costs, overhead, and general and administrative expenses.

•Indirect costs consist of expenses generally associated with bonuses and fringe benefits, including employee health and medical insurance, 401(k) matching contributions, and payroll taxes.

•Overhead consists of expenses associated with the support of operations or production, including labor for management of contracts, operations, training, supplies, and certain facilities to perform customer work.

•General and administrative expenses consist primarily of corporate and administrative labor expenses, administrative bonuses, legal expenses, information technology ("IT") expenses, and insurance expenses.

Results of operations

The period to period comparisons of our results of operations have been prepared using the historical periods included in our unaudited consolidated financial statements. The following discussion should be read in conjunction with the unaudited consolidated financial statements and related notes included elsewhere in this Quarterly Report on Form 10-Q.

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Three Months Ended March 31, 2026 Compared to Three Months Ended March 31, 2025


	Three Months Ended March 31,				Change
	2026		2025		Amount		%
Revenues	$	14,291,961	$	11,664,365	$	2,627,596	23	%
Cost of revenues	9,229,741		7,109,749		2,119,992		30	%
Gross Profit	5,062,220		4,554,616		507,604		11	%
Operating expenses:
Indirect costs	2,461,140		2,385,544		75,596		3	%
Overhead	644,356		512,924		131,432		26	%
General and administrative expenses	2,654,722		3,142,155		(487,433)		(16)	%


Total operating expenses	5,760,218		6,040,623		(280,405)		(5)	%
Loss from operations:	(697,998)		(1,486,007)		788,009		(53)	%

Other income, net	353,400		390,236		(36,836)		(9)	%

Loss before income taxes and preferred stock dividends	(344,598)		(1,095,771)		751,173		(69)	%

Income tax expense	(6,676)		(74,276)		67,600		(91)	%
Preferred stock dividend	26,819		26,984		(165)		(1)	%
Net Loss	$	(378,093)	$	(1,197,031)	$	818,938	(68)	%

Revenue

Total revenue was $14,291,961 for the three months ended March 31, 2026 as compared to total revenue of $11,664,365 for the three months ended March 31, 2025. The increase of $2,627,596 or 23%, was driven primarily by the award in March 2024 to the Company's subsidiary Global Technology and Management Resources, Inc. ("GTMR") of a $103.3 million, five and one-half year contract for Special Missions Management of On-Site Services in support of the Naval Air Systems Command (“NAVAIR”) Program Office 290 (“PMA-290”) Special Missions which ramped in 2025 and the award in October 2025, to the Company's Specialty Systems, Inc. (“SSI”) subsidiary of a $66.2 million full and open, five year contract for logistics, engineering, cyber support services needed in support of the Naval Air Warfare Center Aircraft Division (“NAWCAD”) Lakehurst (“LKE”) Mission Operations & Integration (“MO&I”) Department and additional direct labor growth on existing contracts.

Cost of revenues

Total cost of revenues was $9,229,741 for the three months ended March 31, 2026 as compared to total cost of revenues of $7,109,749 for the three months ended March 31, 2025. The increase of $2,119,992, or 30%, is in line with the change in revenue noted above, driven by additional labor and subcontractor costs for the PMA-290 award, which typically carry a lower margin than direct labor.

Gross Profit

Total gross profit was $5,062,220 for the three months ended March 31, 2026 as compared to total gross profit of $4,554,616 for the three months ended March 31, 2025. The increase of $507,604, or 11%, was driven primarily by the increase of revenue noted above offset by the lower margin of increased subcontractor costs.

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Operating expenses

Total operating expenses were $5,760,218 for the three months ended March 31, 2026 as compared to total operating expense of $6,040,623 for the three months ended March 31, 2025. The decrease of $280,405, or 5%, was primarily driven by a decrease in the amount of noncash stock-based compensation granted to certain employees.

Other income (expense)

Total other income was $353,400 for the three months ended March 31, 2026 as compared to total other income of $390,236 for the three months ended March 31, 2025. The decrease in (expense) of $(36,836) or 9%, was primarily driven by the decrease in interest expense due to the overall decrease in debt, offset by the decrease in expense due to the reduction in the fair value of derivative liability.

Income tax expense

Income tax expense was $(6,676) for the three months ended March 31, 2026, as compared to an expense of $(74,276) for the three months ended March 31, 2025. The decrease in expense of $67,600 or 91% was primarily related to related to the Company utilizing it's tax attributes to decrease its current taxable income.

Contract backlog

We define backlog to include the following three components:

•Funded Backlog - Funded backlog represents the revenue value of orders for services under existing contracts for which funding is appropriated or otherwise authorized less revenue previously recognized on these contracts.

•Unfunded Backlog - Unfunded backlog represents the revenue value of orders (including optional orders) for services under existing contracts for which funding has not been appropriated or otherwise authorized.

•Priced Options - Priced contract options represent 100% of the potential revenue value of all scheduled future contract option periods or orders under existing contracts that may be exercised at our clients’ option and for which funding has not been appropriated or otherwise authorized.

Our backlog does not include contracts that have been awarded but are currently under protest and also does not include any task orders under indefinite delivery indefinite quantity contracts, except to the extent that task orders have been awarded to us under those contracts.

Contract Backlog


Funded	$	22,397,810
Unfunded	38,300,351
Priced Options	212,561,804
Total Scheduled Backlog	$	273,259,965

Total backlog

Our total scheduled backlog consists of remaining performance obligations, certain orders under contracts for which the original period of performance has expired, unexercised option periods, and other unexercised or optional orders. Excluding unscheduled options orders, as of March 31, 2026, the Company had a total backlog of $273,259,965 which includes funded, unfunded, and scheduled priced options. We expect to recognize approximately 16.0% of the remaining performance obligations over the next 12 months, and approximately 49.0% over the next 24 months. The remainder is expected to be recognized thereafter. As with all government contracts there is no guarantee the customer will have future funding or exercise their contract option in the out-years. Our backlog includes orders under contracts that in some cases extend for several years. Congress generally appropriates funds for our clients on a yearly basis, even though their contracts with us may call for performance that is expected to take a number of years to complete. As a result, contracts typically are only partially funded at any point during their term and all or some of the work to be performed under the contracts may remain unfunded unless and until the U.S. Congress makes subsequent appropriations and the procuring agency allocates funding to the contract.

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We cannot predict with any certainty the portion of our backlog that we expect to recognize as revenue in any future period and we cannot guarantee that we will recognize any revenue from our backlog. The primary risks that could affect our ability to recognize such revenue on a timely basis or at all are: program schedule changes, contract modifications, and our ability to assimilate and deploy new consulting staff against funded backlog; cost-cutting initiatives and other efforts to reduce USG spending, which could reduce or delay funding for orders for services; and delayed funding of our contracts due to delays in the completion of the USG's budgeting process and the use of CR's by the USG to fund its operations. The amount of our funded backlog is also subject to change, due to, among other factors: changes in congressional appropriations that reflect changes in USG policies or priorities resulting from various military, political, economic, or international developments; changes in the use of USG contracting vehicles, and the provisions therein used to procure our services and adjustments to the scope of services, or cancellation of contracts by the USG at any time. In our recent experience, none of the following additional risks have had a material negative effect on our ability to realize revenue from our funded backlog: the unilateral right of the USG to cancel multi-year contracts and related orders or to terminate existing contracts for convenience or default; in the case of unfunded backlog, the potential that funding will not be made available; and, in the case of priced options, the risk that our clients will not exercise their options.

In addition, contract backlog includes orders under contracts for which the period of performance has expired, and we may not recognize revenue on the funded backlog that includes such orders due to, among other reasons, the tardy submission of invoices by our subcontractors and the expiration of the relevant appropriated funding in accordance with a predetermined expiration date such as the end of the USG's fiscal year.

We expect to recognize revenue from a substantial portion of funded backlog within the next 24 months. However, given the uncertainties discussed above, we can give no assurance that we will be able to convert our backlog into revenue in any particular period, if at all.

Liquidity and capital resources

Sources

We have historically sourced our liquidity requirements with cash flows from operations, borrowings under our previous credit facilities, and in October, 2022, with an equity issuance through the listing of our common stock on the NYSE American LLC. As of March 31, 2026, we had $15,772,974 of cash on hand. During the fiscal year 2025, we undertook the following significant equity and debt transactions that enhanced our liquidity and sources of funds:

•2,000,000 warrants were exercised in February of 2025 to purchase 2,000,000 shares of the Company’s common stock, which resulted in aggregate proceeds to the Company of $700,000.

•Gross proceeds from the March 2025 Public Offering were approximately $4.5 million before deducting placement agent fees and offering expenses.

•Gross proceeds from the March 2025 Warrants were $1.90 million before deducing placement agent fees.

•Gross proceeds from the June 2025 Public Offering were approximately $5.0 million before deducting placement agent fees and offering expenses.

•Gross proceeds from the June 2025 Warrants were $4.48 million before deducing placement agent fees.

We believe our existing cash provided by our ongoing operations, together with funds available from the transactions noted above, will be sufficient to meet our working capital, capital expenditures, and cash needs for the next 12 months and beyond.

Uses

Management believes that cash flows from operating activities, existing cash on hand, and available borrowings under our revolving credit facility will be sufficient to meet our anticipated cash requirements for at least the next twelve months. Our primary uses of cash include:

•Compensation and employee-related costs, which represent the substantial majority of our operating expenses;

•Subcontractor and other direct contract costs;

•Working capital requirements to support organic revenue growth and new contract ramp-up;

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•Capital expenditures, which have historically been minimal given the labor-intensive nature of our business; and

•Strategic acquisitions, which we continue to evaluate as part of our growth strategy.

Shares of our common stock included in our public float as of May 7, 2026 was 93,357,103 which excludes 1,341,836 shares held by officers, directors, and affiliates.

Cash flows

The following tables present a summary of cash flows from operating, investing, and financing activities for the following comparative periods.

Three Months Ended March 31, 2026 Compared to Three Months Ended March 31, 2025


	Three Months Ended March 31, 2026				Change
	2026		2025		Amount		%
Net cash provided by (used in) operating activities	$	1,290,696	$	(2,502,640)	$	3,793,336	-152	%
Net cash provided by (used in) investing activities	24,319		4,435		$	19,884	NM
Net cash provided by (used in) financing activities	(426,819)		3,532,757		$	(3,959,576)	-112	%
Change in cash	$	888,196	$	1,034,552	$	(146,356)	-14	%
NM - Not Meaningful

Operating activities

Net cash provided by operating activities was $1,290,696 for the three months ended March 31, 2026, compared to $(2,502,640) net cash used in for the three months ended March 31, 2025. This increase in net cash provided by operating activities was primarily driven by a decrease in accounts receivable for the three months ended March 31, 2026 due to collections on existing business and a decrease in net loss.

Investing activities

Net cash provided by investing activities was $24,319 for the three months ended March 31, 2026, compared to $4,435 net cash provided by for the three months ended March 31, 2025. The increase in net cash provided by investing activities was primarily due to the cash received from the sale of Mainnerve Federal Services, Inc. dba MFSI Government Group (“MFSI").

Financing activities

Net cash used in financing activities was $(426,819), for the three months ended March 31, 2026, compared to $3,532,757 net cash provided by financing activities for the three months ended March 31, 2025. The increase in net cash used in financing activities was primarily due to the pay off of the related party note payable as detailed in Note 7, "Notes Payable - Related Party" in this Quarterly Report on Form 10-Q, as compared to the proceeds from the issuance of common stock and warrants issued in the March 2025 Public Offering in 2025.

Critical Accounting Policies and Estimates

A summary of our critical accounting estimates is included in Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the year-ended December 31, 2024. There have been no material changes to the critical accounting estimates disclosed in our Annual Report on Form 10-K for the year-ended December 31, 2025.

Principles of Consolidation

Refer to Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the year-ended December 31, 2025. There have been no material changes to our principles of consolidation disclosed in our Annual Report on Form 10-K for the year-ended December 31, 2025.

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Recently Issued Accounting Standards

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risks in the ordinary course of our business. Market risk represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. These risks include the following:

Interest rate and market risk

The Company has no debt obligations tied to the Prime Rate or the Secured Overnight Financing Rate.

Effects of inflation

U.S. inflation has begun to moderate after nearing a 40-year high in June 2022. Because costs rise faster than revenues during the early phase of inflation, we may need to give higher than normal raises to employees, start new employees at higher wages and/or have increased cost of employee benefits, but not be able to pass the higher costs through to the government due to competition and government pressures. Therefore, we may be adversely affected (i) with lower gross profit margins; (ii) by losing contracts which are lowest price technically acceptable where another bidder underbids the real rates and then has difficulty staffing the project; and (iii) by having difficulty maintaining our staff at current salaries. Given the long-term nature of the Company’s contracts, we may be unable to take sufficient action to mitigate inflationary pressures.

Item 4. Controls and Procedures

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Securities Exchange Act of 1934 (the "Exchange Act") is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in Company reports filed or submitted under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer ("CEO") and Chief Financial Officer ("CFO"), to allow timely decisions regarding required disclosure.

As required by Rules 13a-15 and 15d-15 under the Exchange Act, our CEO and CFO carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2026. Based upon their evaluation, our CEO and CFO concluded that our disclosure controls and procedures (as defined in Rules 13a- 15 (e) and 15d-15 (e) under the Exchange Act) were effective as of March 31, 2026.

Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the three months ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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Part II

Item 1. Legal Proceedings

As a commercial enterprise and employer, the Company and our subsidiaries are subject to threatened litigation and other legal actions in the ordinary course of business, including employee-related matters, inquiries, and administrative proceedings regarding our employment practices, technology, or other matters. Neither our Company nor any of our subsidiaries is a party to any legal proceeding that, individually or in the aggregate, we believe to be uncovered by insurance or otherwise material to our Company as a whole.

Item 1A. Risk Factors

In the course of conducting our business operations, we are exposed to a variety of risks. Any of the risk factors we described in Part I, Item 1A. of our Annual Report on Form 10-K for the year ended December 31, 2025 filed on March 9, 2026 have affected or could materially adversely affect our business, prospects, operating results, and financial condition. There have been no material changes from the risk factors described in that report.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a)Recent Sales of Unregistered Securities.

The Company had no recent sales of unregistered securities.

(b)Use of Proceeds from the Public Offering(s).

On March 19, 2025, the Company closed on the public offering of 4,500,000 units ("Unit(s)") at a public offering price of $1.00 per Unit (the "March 2025 Public Offering"). Each Unit consisted of one share of common stock and one warrant to purchase one share of common stock (the "March 2025 Warrants"). The March 2025 Warrants were immediately exercisable at $1.08 per share and expired 60 days from the date of issuance. The shares of common stock and the March 2025 Warrants are immediately separable and were issued separately.

Gross proceeds from the March 2025 Public Offering were approximately $4.5 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the March 2025 Public Offering for working capital and general corporate purposes.

Gross proceeds from the June 2025 Public Offering were approximately $5.0 million before deducting placement agent fees and offering expenses. Castellum used the net proceeds of the June 2025 Public Offering for working capital and general corporate purposes.

There has been no material change in the planned use of proceeds from the March 2025 Public Offering (as described in our final prospectus dated March 17, 2025) or from the June 2025 Public Offering (as described in our final prospectus dated June 12, 2025) each of which was filed with the SEC on the same date pursuant to Rule 424(b)(5) of the Securities Act. As of the date of this Quarterly Report on Form 10-Q, we cannot predict with certainty all of the particular uses for the net proceeds, or the amounts that we will actually spend on the uses set forth in the prospectus.

Item 3. Defaults Upon Senior Securities

None.

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Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

During the quarterly period ended March 31, 2026, no directors or officers adopted or terminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as those terms are defined in Regulation S-K, Item 408.

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Item 6. Exhibits

The documents listed in this Exhibit Index of this Quarterly Report on Form 10-Q are incorporated by reference or are filed with this Quarterly Report on Form 10-Q, in each case as indicated therein (numbered in accordance with Item 601 of Regulation S-K).


			Incorporated by Reference
Exhibit Number		Form	File Number	Exhibit	Filing Date

2.1	Agreement and Plan of Merger dated August 12, 2021, by and among Registrant, KC Holdings Company, Inc., Specialty Systems, Inc., and the Stockholders named herein	S-1	333-267249	2.5	September 2, 2022

2.2	Agreement and Plan of Merger dated as of March 22, 2023 by and among Castellum, Inc., GTMR Merger Sub., Inc., Global Technology and Management Resources, Inc. (“GTMR”), the stockholders of GTMR, and James Morton, as the representative of the stockholders	8-K	001-41526	2.1	March 28, 2023

3.1	Amended and Restated Articles of Incorporation of Registrant	S-1	333-267249	3.1	September 2, 2022

3.2	Amended and Restated Bylaws of Registrant	S-1/A	333-267249	3.2	October 4, 2022

3.3	Certificate of Amendment to the Amended and Restated Articles of Incorporation of Registrant	8-K	001-41526	3.1	October 18, 2022

3.4	Certificate of Amendment to the Amended and Restated Articles of Incorporation of Registrant	8-K	001-41526	3.1	April 6, 2023

4.1	Form of Warrant to Purchase Common Stock of Registrant	S-1	333-267249	4.1	September 2, 2022

4.2	Common Stock Purchase Warrant dated April 4, 2022, by and between Registrant and Crom Cortana Fund LLC	S-1	333-267249	4.4	September 2, 2022

4.3	Form of Warrant to Purchase Common Stock of Registrant	8-K	001-41526	4.1	March 18, 2025

4.4	Form of Warrant to Purchase Common Stock of Registrant	8-K	001-41526	4.1	June 13, 2025

10.1	Business Acquisition Agreement dated February 11, 2022, by and between Registrant and Lexington Solutions Group, LLC	S-1	333-267249	10.8	September 2, 2022

10.2+	Registrant’s Second Amended 2021 Stock Incentive Plan	S-8	333-284205	10.1	September 17, 2025

10.3+	Registrant’s 2025 Employee Stock Purchase Plan	S-8	333-284205	10.1	September 17, 2025

10.4+	Form of Stock Option Agreement	S-1	333-267249	10.1	September 02, 2022

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10.5+	Employment Agreement executed on March 22, 2023 by and between James Morton and Castellum, Inc.	8-K	001-41526	10.1	March 28, 2023

10.6+	Form of Restrictive Covenant Agreement, by and among ____, individually, in favor of and for the benefit of Global Technology and Management Resources, Inc. and Castellum, Inc.	8-K	001-41526	10.2	March 28, 2023

10.7+	Employment Agreement dated July 1, 2024 by and between the Registrant and Glen R. Ives	8-K	001-41526	10.1	July 3, 2024

10.8	Lease Agreement dated January 11, 2018, between LTD Realty Investment, IV, LP, and Specialty Systems, Inc.	S-1	333-267249	10.15	September 2, 2022

10.9	Form of Director Agreement	S-1	333-267249	10.16	September 2, 2022

10.10++	Contract No. N0017819D7718 effective January 2, 2019 between Global Technology Management Services, Inc. and SeaPort NxG	8-K	001-41526	10.25	February 28, 2025

10.11	Form of Securities Purchase Agreement by and between Registrant and certain investors	8-K	001-41526	10.1	March 18, 2025

10.12	Placement Agency Agreement dated March 16, 2025 by and between Registrant and Maxim Group LLC	8-K	001-41526	10.2	March 18, 2025

10.13	Warrant Agent Agreement dated March 17, 2025 by and between Registrant and Nevada Agency and Transfer Company	8-K	001-41526	10.3	March 18, 2025

10.14+	Amendment dated April 3, 2025 to Employment Agreement dated July 1, 2024 with Glen R. Ives	8-K	001-41526	10.2	April 4, 2025

10.15	Form of Securities Purchase Agreement by and between Registrant and certain investors	8-K	001-41526	10.1	June 13, 2025

10.16	Placement Agency Agreement dated June 12, 2025 by and between Registrant and Maxim Group LLC	8-K	001-41526	10.2	June 13, 2025

10.17	Warrant Agency Agreement dated June 13, 2025 by and between Registrant and Nevada Agency and Transfer Company	8-K	001-41526	10.3	June 13, 2025

10.18++	Delivery Order N0042125F3003 under Contract No. N0017819D7718 effective February 27, 2025 between Global Technology and Management Resources, Inc. and NAVAIR Aircraft Division Pax River	10-K	001-41526	10.19	March 9, 2026

10.19++	Delivery Order N6833525F3003 under Contract No. N0017819D7718 effective September 18, 2025 between Global Technology and Management Resources, Inc. and NAVAIR Aircraft Division Lakehurst	10-K	001-41526	10.20	March 9, 2026

23.1*	Consent of Independent Registered Public Accounting Firm

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31.1*

Certification of Principal Executive Officer pursuant to Exchange Act Rules 13(a)-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2*

Certification of Principal Financial Officer pursuant to Exchange Act Rules 13(a)-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1*

Certification of Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2*

Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101

The following financial information from Castellum, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2023 formatted in Inline XBRL (Extensible Business Reporting Language) includes: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statements of Cash Flows, (iv) the Consolidated Statements of Changes in Stockholders’ Equity, and (v) Notes to the Consolidated Financial Statements.

104

Cover Page Interactive Data File - (formatted as Inline XBRL and contained in Exhibit 101)

_______________________

* Filed herewith.

** The certifications attached as Exhibits 32.1 and 32.2 that accompany this Quarterly Report on Form 10-Q are not deemed filed with the SEC and not to be incorporated by reference into any filing of the Registrant under the Securities Act of 1933, as amended, or the Exchange Act whether made before or after the date of this Quarterly Report on Form 10-Q, irrespective of any general incorporation language contained in such filing.

+ Management contract or compensatory plan.

++ Portions of this exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K because such information is (i) not material and (ii) the type of information the Company treats as confidential. The Company will furnish supplementally an unredacted copy of such exhibit to the SEC or its staff upon its request.

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Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


Date: May 8, 2026			CASTELLUM, INC.

			/s/ Glen R. Ives
			Glen R. Ives
			Chief Executive Officer (Principal Executive Officer)

			/s/ David T. Bell
			David T. Bell
			Chief Financial Officer (Principal Financial Officer)

Castellum - 10-Q quarterly report FY

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