Atmos Energy Corporation (ATO) ownership: Top institutional holder: VANGUARD GROUP INC ($3.53B). Insider activity: Net Seller (6 buys, 14 sells). 9 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 21032554.00 | $3.53B | 2025-12-31 |
| BlackRock, Inc. | 17451963.00 | $3.22B | 2026-03-31 |
| STATE STREET CORP | 11372750.00 | $2.10B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 10735547.00 | $1.98B | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 9651472.00 | $1.78B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 9285633.00 | $1.72B | 2026-03-31 |
| Capital International Investors | 7326778.00 | $1.35B | 2026-03-31 |
| Aristotle Capital Management, LLC | 4866481.00 | $898.95M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-02 | |
| Sell | null | 2026-05-02 | |
| Sell | null | 2026-05-02 | |
| Buy | null | 2026-05-02 | |
| Sell | null | 2026-05-02 | |
| Sell | null | 2026-05-02 | |
| Sell | null | 2026-05-02 | |
| Buy | null | 2026-05-02 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.