ONE Gas (OGS) - Market capitalization

Market cap: £3.44 Billion

As of December 2025 ONE Gas has a market cap of £3.44 Billion. This makes ONE Gas the world's 3201th 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 ONE Gas from 2014 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£3.44 B	9.61%
2024	£3.14 B	13.23%
2023	£2.77 B	-18.15%
2022	£3.38 B	10.01%
2021	£3.08 B	3%
2020	£2.99 B	-20.58%
2019	£3.76 B	14.24%
2018	£3.29 B	16.33%
2017	£2.83 B	4.63%
2016	£2.70 B	53.07%
2015	£1.76 B	28.3%
2014	£1.37 B

End of Day market cap according to different sources

On Dec 10th, 2025 the market cap of ONE Gas was reported to be:

£3.44 Billion

by Nasdaq

£3.44 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	£20.15 B	485.46%	🇺🇸 USA
NW Natural NWN	£1.43 B	-58.42%	🇺🇸 USA
RGC Resources RGCO	£0.17 B	-94.96%	🇺🇸 USA
CenterPoint Energy CNP	£18.28 B	431.17%	🇺🇸 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 ONE Gas (OGS)

Market cap: £3.44 Billion