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Atmos Energy ATO

Atmos Energy is the 322nd largest S&P 500 company by market cap, worth $29.1 billion. 14 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 6 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 13.2% of the company.

CEO
John K. Akers
Sector
Utilities
Sub-industry
Gas Utilities
Headquarters
Dallas, Texas
Founded
1906
More
Wikipedia
Market cap
$29.1B
322nd largest, 23 Oct 2026 close
Revenue
$4.7B
Fiscal year 2025
Price to sales
6.2
Market cap over revenue
Employees
5,487
10-K, 30 Sep 2025
Market cap per employee
$5.3M
Market cap over employees
Connections
0
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Atmos Energy. Where a company has several share classes, the share is of its total value.

13F filings for the quarter to 30 Jun 2026

These five hold 40.3% of Atmos Energy.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

Roles filed up to 30 Sep 2026

NameTitle
Directors (14)
John K. AkersPresident & CEOPresident & CEO
John C. AleDirectorLast filed 10 Mar 2026Director
Kim R. CocklinDirectorLast filed 10 Mar 2026Director
Kelly H. ComptonDirectorLast filed 10 Mar 2026Director
Mitzi H. CooglerDirectorLast filed 10 Mar 2026Director
Sean DonohueDirectorLast filed 10 Mar 2026Director
Rafael G. GarzaDirectorDirector
Edward GeiserDirectorDirector
James Henry Jeffries IVDirectorDirector
Nancy K. QuinnDirectorLast filed 10 Mar 2026Director
Richard A. SampsonDirectorLast filed 5 Feb 2026Director
Telisa ToliverDirectorLast filed 10 Mar 2026Director
William James WareDirectorDirector
Frank H. YohoDirectorLast filed 10 Mar 2026Director
Officers (6)
Christopher T. ForsytheSr Vice President & CFOLast filed 4 May 2026Sr Vice President & CFO
Jessica Walker BatemanSr VP, Gen Counsel, Corp Sec'yLast filed 4 Feb 2026Sr VP, Gen Counsel, Corp Sec'y
Michelle FaulkVice President & ControllerLast filed 4 May 2026Vice President & Controller
Karen E. HartsfieldSenior AdvisorLast filed 4 May 2026Senior Advisor
John S. McDillSr VP, Utility OperationsLast filed 4 May 2026Sr VP, Utility Operations
J. Matt RobbinsSr VP, Human ResourcesLast filed 17 Sep 2026Sr VP, Human Resources

Source: SEC insider filings (Forms 3, 4 and 5), Atmos Energy's Form 4 filings 路 All directors and officers

Atmos Energy's market cap since December 2008

Marked weeks are changes in the share count, such as a merger, not market moves.

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$29.1B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 30 Sep 2025

Employees
5,487
At September 30, 2025, we had 5,487 employees.
Atmos Energy Form 10-K

Source: Atmos Energy Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $77,018 of stock in 1 sale and bought $50,277 in 1 purchase in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
11 Aug 2026BuyWilliam James WareDirectorDirectorBuy300$50K
3 Dec 2025SaleSean DonohueDirectorDirectorSale450$77K

Source: SEC insider transactions data sets, Atmos Energy's Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

6 people disclosed 6 purchases and 6 sales of Atmos Energy stock since October 2023.

DateMember or officialTypeAmount
12 Jun 2026Donald J Trump (President)President 路 SoldSale$15,001 to $50,000$15K to $50K
12 Jun 2026John Boozman (Senate, R-AR)Senate, R-AR 路 SoldSale$1,001 to $15,000$1K to $15K
11 May 2026Donald J Trump (President)President 路 SoldSale$1,001 to $15,000$1K to $15K
27 Apr 2026Donald J Trump (President)President 路 SoldSale$1,001 to $15,000$1K to $15K
30 Jan 2026Arjun Mody (Deputy Commissioner)Deputy Commissioner 路 SoldSale$1,001 to $15,000$1K to $15K
29 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K
2 Dec 2025Jared Moskowitz (House, D-FL)House, D-FL 路 BoughtPurchase$1,001 to $15,000$1K to $15K
19 Aug 2025Richard W. Allen (House, R-GA)House, R-GA 路 BoughtPurchase$15,001 to $50,000$15K to $50K
20 May 2025John Boozman (Senate, R-AR)Senate, R-AR 路 BoughtPurchase$1,001 to $15,000$1K to $15K
20 May 2025John Boozman (Senate, R-AR)Senate, R-AR 路 BoughtPurchase$1,001 to $15,000$1K to $15K

Showing 10 of 12 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

Not on file: no director or officer shared with another S&P 500 company and no WARN layoff notices under its own name since October 2023.