Atmos Energy (ATO) - Market capitalization

Market cap: S$34.86 Billion

As of December 2025 Atmos Energy has a market cap of S$34.86 Billion. This makes Atmos Energy the world's 856th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Atmos Energy from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	S$34.86 B	18.41%
2024	S$29.44 B	29.53%
2023	S$22.73 B	7.29%
2022	S$21.18 B	12.72%
2021	S$18.79 B	18.13%
2020	S$15.91 B	-13.7%
2019	S$18.43 B	24.52%
2018	S$14.80 B	16.16%
2017	S$12.74 B	13.02%
2016	S$11.27 B	23.9%
2015	S$9.10 B	22.54%
2014	S$7.42 B	41.91%
2013	S$5.23 B	34.64%
2012	S$3.88 B	-0.23%
2011	S$3.89 B	6.97%
2010	S$3.64 B	-5.07%
2009	S$3.83 B	24.23%
2008	S$3.08 B	-14.85%
2007	S$3.62 B	-16.23%
2006	S$4.33 B	22.97%
2005	S$3.52 B	-0.42%
2004	S$3.53 B	65.37%
2003	S$2.13 B	16.49%
2002	S$1.83 B	14.26%
2001	S$1.60 B	-2.19%
2000	S$1.64 B	53.09%
1999	S$1.07 B	-34.26%
1998	S$1.63 B	7.21%
1997	S$1.52 B	182.69%
1996	S$0.53 B

End of Day market cap according to different sources

On Dec 9th, 2025 the market cap of Atmos Energy was reported to be:

S$34.86 Billion

by Nasdaq

S$34.86 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
National Fuel Gas NFG	S$9.59 B	-72.47%	🇺🇸 USA
ONE Gas OGS	S$6.04 B	-82.67%	🇺🇸 USA
NiSource NI	S$25.42 B	-27.06%	🇺🇸 USA
Chesapeake Utilities CPK	S$3.85 B	-88.94%	🇺🇸 USA
RGC Resources RGCO	S$0.29 B	-99.15%	🇺🇸 USA
Oneok OKE	S$61.20 B	75.58%	🇺🇸 USA
CenterPoint Energy CNP	S$32.10 B	-7.90%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Atmos Energy (ATO)

Market cap: S$34.86 Billion