As of February 2026 Atmos Energy has a market cap of โฌ25.52 Billion. This makes Atmos Energy the world's 836th 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.
On Feb 24th, 2026 the market cap of Atmos Energy was reported to be: