| ATO Market Cap History Table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Below is a table of the ATO market cap history going back to 1/28/2010:
Also see: ATO Shares Outstanding History and ATO YTD Return |
ATO Market Cap History — Atmos Energy Capitalization Over Time
As of 5/1/2026 Atmos Energy has a market cap of 31.47 billion. Investors often follow the ATO market cap history to compare the size of the company over time.
This page shows ATO market capitalization trends over time, with 67 market cap datapoints presented, dating back to 1/28/2010.
| ATO Market Cap History Chart | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ATO Historical Market Cap: +16.55% CAGR 
Mouse over chart for data details
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| ATO Stock Price Chart |
| About Atmos Energy Corp. |
| Atmos Energy Corporation is a natural gas-only distributor. Co. delivers natural gas to over 3.3 million distribution customers in over 1,400 communities across eight states located primarily in the South. Co. manages proprietary pipeline and storage assets, including intrastate natural gas pipeline systems in Texas. Its segments include distribution, and pipeline and storage. The distribution segment comprises its regulated natural gas distribution and related sales operations in eight states. The pipeline and storage segment comprises the pipeline and storage operations of its Atmos Pipeline-Texas (APT) division and its natural gas transmission operations in Louisiana. We show 67 historical shares outstanding datapoints in our ATO shares outstanding history coverage, used to compute ATO market cap on those dates. Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing ATO market cap history over the course of time is important for investors interested in comparing ATO's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of ATO versus a peer is one thing; comparing ATO market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like ATO can fluctuate over the course of history. With this page we aim to empower investors researching ATO by allowing them to research the ATO market cap history. |
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| Video: The Importance of Market Cap | |
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Video: The Importance of Market Cap
| ATO Share Performance |
| Market Cap Peers |
| Atmos Energy (ATO) is categorized under the Utilities sector; to help you further research historical market cap numbers, below are some other companies in the same sector:
AVA Market Cap History AWK Market Cap History AWR Market Cap History BEP Market Cap History BIP Market Cap History BKH Market Cap History BWC Market Cap History CAFD Market Cap History CDZI Market Cap History CEG Market Cap History More Utilities companies » |
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