ONE Gas (OGS) - Market capitalization

Market cap: A$7.03 Billion

As of December 2025 ONE Gas has a market cap of A$7.03 Billion. This makes ONE Gas the world's 3188th 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	A$7.03 B	11%
2024	A$6.33 B	22.16%
2023	A$5.18 B	-13.91%
2022	A$6.02 B	5.04%
2021	A$5.73 B	8.19%
2020	A$5.30 B	-24.83%
2019	A$7.05 B	18.74%
2018	A$5.93 B	21.08%
2017	A$4.90 B	5.81%
2016	A$4.63 B	28.81%
2015	A$3.59 B	37.19%
2014	A$2.62 B

End of Day market cap according to different sources

On Dec 19th, 2025 the market cap of ONE Gas was reported to be:

A$7.03 Billion

by Nasdaq

A$7.03 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	A$40.75 B	479.45%	🇺🇸 USA
NW Natural NWN	A$2.91 B	-58.49%	🇺🇸 USA
RGC Resources RGCO	A$0.36 B	-94.87%	🇺🇸 USA
CenterPoint Energy CNP	A$37.11 B	427.71%	🇺🇸 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: A$7.03 Billion