ATI Inc. (ATI) ownership: Top institutional holder: BlackRock, Inc. ($2.39B). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 16441653.00 | $2.39B | 2026-03-31 |
| VANGUARD GROUP INC | 12726524.00 | $1.46B | 2025-12-31 |
| Capital Research Global Investors | 6160107.00 | $895.96M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6124128.00 | $890.82M | 2026-03-31 |
| Capital International Investors | 5883949.00 | $854.87M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5821508.00 | $846.80M | 2026-03-31 |
| Capital World Investors | 5712929.00 | $831.00M | 2026-03-31 |
| STATE STREET CORP | 5381013.00 | $782.72M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-05-19 | |
| Sell | null | 2026-05-19 |
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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.