Atmos Energy Corporation (ATO) Ownership
ATO ownership summary
as of October 18, 2026- Institutions
- 98.0% of shares outstanding
- Insiders
- 0.40% of shares outstanding
- Shares outstanding
- 169.0M
- Float
- 168.2M shares available to trade
- Short interest
- 3.02% 4.5M shares short
- Days to cover
- 4.38 short interest up 1.8% vs prior month
- Institutions 98.02%
- Insiders 0.40%
- Other investors 1.57%
ATO top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 9.02% | 15.2M | $2.55B | −2.2M (−12.7%) | June 30, 2026 |
| 2 | State Street Corp | 6.73% | 11.4M | $1.90B | +7,310 (+0.1%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 6.44% | 10.9M | $1.82B | +149,606 (+1.4%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 5.54% | 9.4M | $1.57B | +74,502 (+0.8%) | June 30, 2026 |
| 5 | Wellington Management Company LLP | 5.44% | 9.2M | $1.54B | −465,684 (−4.8%) | June 30, 2026 |
| 6 | Capital Research & Mgmt Co - Division 3 | 4.43% | 7.5M | $1.25B | +156,234 (+2.1%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.66% | 4.5M | $751.2M | +152,281 (+3.5%) | June 30, 2026 |
| 8 | Bank of America Corp | 2.47% | 4.2M | $699.6M | −18,715 (−0.4%) | June 30, 2026 |
| 9 | Amvescap Plc. | 1.88% | 3.2M | $531.1M | +166,469 (+5.5%) | June 30, 2026 |
| 10 | Morgan Stanley - Brokerage Accounts | 1.69% | 2.9M | $479.2M | −137,467 (−4.6%) | June 30, 2026 |
| 11 | Deutsche Bank AG | 1.48% | 2.5M | $419.3M | −41,221 (−1.6%) | June 30, 2026 |
| 12 | T. Rowe Price Associates, Inc. | 1.47% | 2.5M | $415.3M | −233,458 (−8.6%) | June 30, 2026 |
| 13 | AQR Capital Management LLC | 1.40% | 2.4M | $397.2M | +1.6M (+188.5%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 1.28% | 2.2M | $362.4M | +230,622 (+11.9%) | June 30, 2026 |
| 15 | Qube Research & Technologies | 1.26% | 2.1M | $357.5M | +2.1M (+2,485.6%) | June 30, 2026 |
| 16 | NORGES BANK | 1.23% | 2.1M | $347.9M | +102,096 (+5.2%) | June 30, 2026 |
| 17 | Massachusetts Financial Services Company | 1.09% | 1.8M | $308.3M | +69,982 (+3.9%) | June 30, 2026 |
| 18 | Amundi | 1.08% | 1.8M | $305.2M | +520,828 (+40.0%) | June 30, 2026 |
| 19 | Citadel Advisors Llc | 1.03% | 1.7M | $290.6M | +984,801 (+131.0%) | June 30, 2026 |
| 20 | Legal & General Group PLC | 0.95% | 1.6M | $268.6M | −11,007 (−0.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 6.2M shares and 7 cut 3.1M.
ATO top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.14% | 5.3M | $887.4M | −9,560 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.63% | 4.4M | $742.7M | +4,941 (+0.1%) | September 30, 2026 |
| 3 | Vanguard Small Cap Index | 2.25% | 3.8M | $636.7M | −35,814 (−0.9%) | September 30, 2026 |
| 4 | American Funds Fundamental Invs A | 1.87% | 3.2M | $529.0M | +45,029 (+1.4%) | September 30, 2026 |
| 5 | State Street®UtilSelSectSPDR®ETF | 1.72% | 2.9M | $485.9M | +29,859 (+1.0%) | September 30, 2026 |
| 6 | Vanguard MStar Small Cap Value Index | 1.46% | 2.5M | $414.2M | +36,411 (+1.5%) | September 30, 2026 |
| 7 | Vanguard Equity-Income Inv | 1.41% | 2.4M | $399.5M | −46,995 (−1.9%) | June 30, 2026 |
| 8 | iShares Core S&P 500 ETF | 1.33% | 2.3M | $376.8M | −3,626 (−0.2%) | September 30, 2026 |
| 9 | Fidelity 500 Index | 1.28% | 2.2M | $362.6M | +8,332 (+0.4%) | August 31, 2026 |
| 10 | State Street® SPDR® S&P 500® ETF | 1.23% | 2.1M | $347.0M | — | September 30, 2026 |
| 11 | American Funds Capital Inc Bldr A | 0.98% | 1.7M | $276.7M | — | September 30, 2026 |
| 12 | American Funds Invmt Co of Amer A | 0.78% | 1.3M | $220.2M | — | September 30, 2026 |
| 13 | State Street® SPDR® S&P® Dividend ETF | 0.72% | 1.2M | $202.7M | — | September 30, 2026 |
| 14 | iShares MSCI USA Quality Factor ETF | 0.71% | 1.2M | $199.6M | +1,112 (+0.1%) | September 30, 2026 |
| 15 | Invesco S&P 500® Equal Weight ETF | 0.69% | 1.2M | $196.5M | −2,470 (−0.2%) | September 30, 2026 |
| 16 | American Funds Washington Mutual A | 0.69% | 1.2M | $196.5M | — | September 30, 2026 |
| 17 | T. Rowe Price Dividend Growth | 0.68% | 1.2M | $192.8M | — | September 30, 2026 |
| 18 | Vanguard Utilities ETF | 0.68% | 1.1M | $192.0M | −2,941 (−0.3%) | September 30, 2026 |
| 19 | Pictet Glbl Sel Fd Glbl Utilities Eq P | 0.61% | 1.0M | $172.5M | −12,915 (−1.2%) | May 31, 2026 |
| 20 | Vanguard Dividend Appreciation ETF | 0.57% | 956K | $160.0M | +11,197 (+1.2%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ATO insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-29 | Ro Khanna | Sell | $166.72 | — | — |
| 2025-12-03 | Sean Donohue | Sell | $171.15 | 450 | $77,018 |
| 2025-12-02 | Jared Moskowitz | Buy | $170.13 | — | — |
| 2025-08-19 | Rick W. Allen | Buy | $165.72 | — | — |
| 2025-05-20 | John Boozman | Buy | $158.96 | — | — |
| 2025-05-14 | Kim R Cocklin | Sell | $150.98 | 15,000 | $2.3M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ATO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ATO
Institutional investors own 98.0% of Atmos Energy's shares and insiders 0.40%. The largest holder is BlackRock Inc with 9.02% of the shares (15.2M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 7 reduced their stake in the latest filings. Short interest is 3.02% of the float, or 4.38 days of average trading volume. The share count rose 62.3% since 2014.
Related: ATO analyst forecast, ATO key metrics, ATO dividend history. See the ATO stock overview for the latest quote and news.
ATO ownership FAQ
Who owns the most Atmos Energy stock?
The largest shareholders of Atmos Energy are BlackRock Inc (9.02%), State Street Corp (6.73%), Vanguard Capital Management, LLC (6.44%), Vanguard Portfolio Management, LLC (5.54%), Wellington Management Company LLP (5.44%).
What percentage of Atmos Energy is owned by institutions?
Institutions hold 98.0% of Atmos Energy's shares outstanding; insiders hold 0.40%.
Which funds own Atmos Energy?
The largest fund holders of Atmos Energy are Vanguard MStar Total Stk Mkt Idx Invest (3.14%), Vanguard 500 Index Investor (2.63%), Vanguard Small Cap Index (2.25%), American Funds Fundamental Invs A (1.87%), State Street®UtilSelSectSPDR®ETF (1.72%).
What is Atmos Energy's short interest?
4.5M shares of Atmos Energy were sold short, 3.02% of the float; at the average daily volume it would take 4.38 days to cover.
Are insiders buying or selling Atmos Energy?
Of the latest 6 reported insider transactions in Atmos Energy (since May 14, 2025), 3 were purchases and 3 were sales.
How many shares of Atmos Energy are outstanding?
Atmos Energy has 169.0M shares outstanding, of which 168.2M are in the public float.