Atmos EnergyATO -0.03%85 Market Cap is $28,981 Mil as of Jun. 26, 2026. GuruFocus rates ATO with a GF Score™ of 85/100 and a GF Value™ of $155.92 (Modestly Overvalued). The stock has 6 warning signs investors should review. Among 513 Utilities - Regulated companies, Atmos Energy ranks better than 93.96% on this metric.
Market cap is the total market value to buy the whole company. It is equal to the share price times the number of Shares Outstanding (EOP). Atmos Energy's share price for the quarter that ended in Mar. 2026 was $184.72. Atmos Energy's Shares Outstanding (EOP) for the quarter that ended in Mar. 2026 was 167 Mil. Therefore, Atmos Energy's market cap for the quarter that ended in Mar. 2026 was $30,833 Mil.
Atmos Energy's quarterly market cap
increased
from Sep. 2025 ($27,588 Mil) to Dec. 2025 ($27,732 Mil) and
increased
from Dec. 2025 ($27,732 Mil) to Mar. 2026 ($30,833 Mil).
Atmos Energy's annual market cap
increased
from Sep. 2023 ($15,730 Mil) to Sep. 2024 ($21,536 Mil) and
increased
from Sep. 2024 ($21,536 Mil) to Sep. 2025 ($27,588 Mil).
Enterprise Value is the theoretical takeover price. It is more comprehensive than market capitalization (market cap), which only includes common equity. Enterprise Value is calculated as the market cap plus debt and minority interest and preferred shares, minus total cash and cash equivalents. Atmos Energy's Enterprise Value for Today is $38,485 Mil.
Atmos Energy (NYSE:ATO) Market Cap Explanation
Market cap is not the real price you pay for a company. If you buy the company and become its owner, you become the owner of the cash the company has, and you also assume the companys debt. The real price you pay is the Enterprise Value.
Warren Buffett uses the ratio of total market cap of all public traded companies over GDP to measure if the market is expensive. As of April 2012, the US total market cap is about $14.7 trillion, while the US GDP is about $15 trillion. The market was modestly overvalued.
Atmos Energy Market Cap Related Terms
Atmos Energy Market Cap Historical Data
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The historical data trend for Atmos Energy's Market Cap can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
For the Utilities - Regulated Gas subindustry, Atmos Energy's Market Cap, along with its competitors' market caps and Market Cap data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Atmos Energy Market Cap vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Atmos Energy's Market Cap distribution charts can be found below:
* The bar in red indicates where Atmos Energy's Market Cap falls into.
Market cap is the short version of market capitalization. It is the total market value to buy the whole company. It is equal to the share price times the number of shares outstanding.
Atmos Energy's Market Cap for the fiscal year that ended in Sep. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Atmos Energy (ATO) has a Market Cap of $28,981 Mil as of Jun. 26, 2026. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on Atmos Energy and its competitors. According to the industry distribution chart, Atmos Energy ranks #31 out of 513 companies in the Utilities - Regulated industry, placing it in the top 6%.
Is Atmos Energy's Market Cap too high?
Atmos Energy's current Market Cap is $28,981 Mil. The Utilities - Regulated industry median Market Cap is 918.37. Atmos Energy's value of $28,981 Mil is 3055.7% above this industry median. Based on the distribution chart, Atmos Energy ranks #31 out of 513 companies in the Utilities - Regulated industry, which is in the top quartile — a strong position relative to peers. Overall, Atmos Energy has a GF Score™ of 85/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Atmos Energy's Market Cap compare to NI and UGI?
According to the Utilities - Regulated industry distribution chart, Atmos Energy ranks #31 out of 513 companies for Market Cap. This places Atmos Energy in the top 6% of its industry — outperforming the majority of peers. The industry median Market Cap is 918.37. Atmos Energy's value of $28,981 Mil is 3055.7% above this benchmark. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Market Cap for an Utilities - Regulated company?
The median Market Cap among Utilities - Regulated companies is 918.37, based on 513 companies in the industry. Companies in the top quartile (top 25%) have a Market Cap significantly above this median, while those in the bottom quartile fall well below. However, Market Cap should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Atmos Energy's current Market Cap of $28,981 Mil is 3055.7% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Market Cap mean?
A high Market Cap can signal that a stock is expensive relative to its fundamentals. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on Atmos Energy and its competitors. For the Utilities - Regulated industry, the median Market Cap is 918.37 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Atmos Energy's current Market Cap is $28,981 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Atmos Energy stock overvalued right now?
Based on GuruFocus' analysis, Atmos Energy (ATO) is currently considered Modestly Overvalued. The stock's GF Value™ is $155.92, compared to a current price of $173.63 — trading 11.4% above its estimated fair value. The current Market Cap is $28,981 Mil and 3055.7% above the Utilities - Regulated industry median of 918.37. Atmos Energy's overall GF Score™ is 85/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Market Cap calculated?
Market Cap is calculated from a company's financial statements. For Atmos Energy (ATO), the current Market Cap is $28,981 Mil as of Jun. 26, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Atmos Energy (ATO) Overvalued in 2026?
Based on GuruFocus' analysis, Atmos Energy stock appears to be overvalued.
The current stock price of $173.63 is trading 11.4% above its estimated GF Value™ of $155.92.
GuruFocus considers Atmos Energy to be Modestly Overvalued.
Key valuation signals for ATO:
Market Cap: $28,981 Mil
GF Value™: $155.92 vs. price of $173.63 (11.4% above fair value)
Industry Position: 3055.7% above the Utilities - Regulated median (#31 of 513)
No single metric tells the full story. See the ATO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Atmos Energy is the largest publicly traded, fully regulated, pure-play natural gas utility in the United States, serving more than 3.3 million customers in Texas, Colorado, Kansas, Kentucky, Louisiana, Mississippi, Tennessee, and Virginia. About two thirds of its earnings come from Texas, where it distributes natural gas in northern Texas and owns an intrastate gas pipeline spanning several key shale gas formations and interconnected with five storage facilities.
85GF Score
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