🕵️ Atmos Energy Corp ($ATO)
SEC insider & ownership activity, last 12 months · CIK 731802 · every row links its SEC filing
Over the last 12 months insiders sold $77K against $50K of open-market buying. Sean Donohue sold $77K in discretionary trades (Dec). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $50K (1 lots) · 1 seller, $77K (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Sean Donohue | 0 | – | 1 | $77K | Dec 3, 2025 |
| Ware William James | 1 | $50K | 0 | – | Aug 11, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.7% | 13G | Jul 27, 2026 | filing ↗ | |
| Vanguard Capital Management | 7.5% | 13G | Apr 29, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.6% | 13G | Apr 28, 2026 | filing ↗ | |
| Wellington Management Group LLP | 5.5% | 13G | Aug 13, 2026 | filing ↗ | |
| Wellington Group Holdings LLP | 5.5% | 13G | Aug 13, 2026 | filing ↗ | |
| Wellington Investment Advisors Holdings LLP | 5.5% | 13G | Aug 13, 2026 | filing ↗ | |
| Wellington Management Company LLP | 5.1% | 13G | Aug 13, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Sean Donohue | $77K | Dec 3, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Aug 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 18, 2026 | filing ↗ |
| Other events (8.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 27, 2026 | filing ↗ |
| New financial obligation (2.03) | Mar 27, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Feb 4, 2026 | filing ↗ |
| Shareholder vote (5.07) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Earnings (2.02) | Feb 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 3, 2026 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 1, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 1, 2025 | filing ↗ |
| Other events (8.01) | Sep 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 18, 2025 | filing ↗ |