Atmos Energy
ATO · NYSE
Who owns ATO
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 42.9% of ATO’s shares.
- State Street Investment Management (US)6.8%
- Vanguard Capital Management, LLC6.5%
- BlackRock Institutional Trust Company, N.A.6.5%
- Vanguard Portfolio Management, LLC5.6%
- Next 6 largest institutions17.4%
- All other shareholders57.1%
| Holder | Shares | % of shares |
|---|---|---|
| State Street Investment Management (US) | 11.38M | 6.82% |
| Vanguard Capital Management, LLC | 10.89M | 6.52% |
| BlackRock Institutional Trust Company, N.A. | 10.87M | 6.51% |
| Vanguard Portfolio Management, LLC | 9.36M | 5.61% |
| Wellington Management Company, LLP | 9.19M | 5.50% |
| Capital International Investors | 7.48M | 4.48% |
| Geode Capital Management, L.L.C. | 4.49M | 2.69% |
| Bank of America Private Bank | 3.36M | 2.01% |
| AQR Capital Management, LLC | 2.37M | 1.42% |
| T. Rowe Price Associates, Inc. | 2.21M | 1.33% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 5.31M | 3.18% |
| Vanguard 500 Index Fund | 4.38M | 2.62% |
| Vanguard Small-Cap Index Fund | 3.84M | 2.30% |
| American Funds Fundamental Investors Fund, Inc. | 3.12M | 1.87% |
| Utilities Select Sector SPDR Fund | 2.77M | 1.66% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $50.28K (1 trade) of ATO on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Geiser Edward | Award | 225 | $35.05K |
| GARZA RAFAEL G | Award | 77 | $12.00K |
| ROBBINS J MATT | Gift | 1.50K | — |
| Jeffries James Henry IV | Award | 1.00K | $166.96K |
| WARE WILLIAM JAMES | Buy | 300 | $50.28K |
| Geiser Edward | Award | 188 | $32.51K |
| GARZA RAFAEL G | Award | 65 | $11.24K |
| FAULK MICHELLE | Option exercise | 175 | — |
| FAULK MICHELLE | Tax withholding | 70 | $13.28K |
| FAULK MICHELLE | Option exercise | 175 | $33.20K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| John BoozmanSenator | Sale (Full) | $1K–$15K | Jun 12, 2026 |
| Jared MoskowitzHouse | Purchase | $1K–$15K | Dec 2, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.50M
- Days to cover
- 3.81
- % of shares outstanding
- 2.70%
- Average daily volume
- 1.18M
- Change since last report
- +4.4%
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