Atmos Energy Corporation
Ownership
Ownership Structure
Who owns Atmos Energy Corporation (ATO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.5% of the shares are freely tradable; institutional investors hold 102.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 9.02 | 15,237,564 | -12.7 | 06/30/2026 |
| State Street Corp | 6.73 | 11,380,060 | +0.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.44 | 10,885,153 | +1.4 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.54 | 9,360,135 | +0.8 | 06/30/2026 |
| Wellington Management Company LLP | 5.44 | 9,185,788 | -4.8 | 06/30/2026 |
| Capital Research & Mgmt Co - Division 3 | 4.43 | 7,483,012 | +2.1 | 06/30/2026 |
| Geode Capital Management, LLC | 2.66 | 4,489,277 | +3.5 | 06/30/2026 |
| Bank of America Corp | 2.47 | 4,180,718 | -0.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.17 | 5,357,008 | +1.0 | 09/30/2026 |
| Vanguard 500 Index Investor | 2.63 | 4,438,214 | +0.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Robbins J Matt | SR VP, HUMAN RESOURCES | 25,866 | 4,459,313 $ | Sep 15, 2026 | direct |
| Ware William James | Director | 488 | 84,131 $ | Aug 11, 2026 | direct |
| Garza Rafael G | Director | 334 | 57,582 $ | Oct 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Garza Rafael G | Director | Other | 77 | 155.79 | 11,996 |
| Sep 15, 2026 | Robbins J Matt | SR VP, HUMAN RESOURCES | Other | 1,500 | 0.00 | – |
| Aug 11, 2026 | Ware William James | Director | Buy | 300 | 167.59 | 50,278 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.