| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2024-02-14 | ALLIANCEBERNSTEIN L.P. | ATI INC | 3,178,934 | 2.5% | EDGAR |
| SC 13G/A | 2024-02-14 | ALLIANCEBERNSTEIN L.P. | ATI INC | 3,178,934 | 2.5% | EDGAR |
| SC 13G/A | 2024-02-13 | VANGUARD GROUP INC | ATI INC | 14,200,240 | 11.1% | EDGAR |
| SC 13G/A | 2024-02-09 | Capital International Investors | ATI INC | 16,528,642 | 13.0% | EDGAR |
| SC 13G/A | 2024-01-25 | STATE STREET CORP | ATI INC | - | 5.3% | EDGAR |
| SC 13G/A | 2024-01-22 | BlackRock Inc. | ATI INC | 20,232,255 | 15.9% | EDGAR |
| SC 13G | 2023-02-14 | ALLIANCEBERNSTEIN L.P. | ATI INC | 7,041,867 | 5.4% | EDGAR |
| SC 13G/A | 2023-02-13 | Capital International Investors | ATI INC | 16,295,455 | 12.6% | EDGAR |
| SC 13G | 2023-02-13 | ALLIANCEBERNSTEIN L.P. | ATI INC | 7,041,867 | 5.4% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | ATI INC | 14,470,396 | 11.2% | EDGAR |
| SC 13G/A | 2023-02-01 | STATE STREET CORP | ATI INC | - | 5.4% | EDGAR |
| SC 13G/A | 2023-01-26 | BlackRock Inc. | ATI INC | 20,887,351 | 16.1% | EDGAR |
| SC 13G | 2023-01-20 | BlackRock Inc. | ATI INC | 20,887,351 | 16.1% | EDGAR |
| SC 13G/A | 2022-02-11 | Capital International Investors | ALLEGHENY TECHNOLOGIES INC | 15,587,922 | 12.2% | EDGAR |
| SC 13G/A | 2022-02-10 | STATE STREET CORP | ALLEGHENY TECHNOLOGIES INC | - | 6.8% | EDGAR |
| SC 13G/A | 2022-02-09 | VANGUARD GROUP INC | ALLEGHENY TECHNOLOGIES INC | 13,815,653 | 10.9% | EDGAR |
| SC 13G/A | 2022-02-08 | DIMENSIONAL FUND ADVISORS LP | ALLEGHENY TECHNOLOGIES INC | 3,643,625 | 2.9% | EDGAR |
| SC 13G/A | 2022-01-27 | BlackRock Inc. | ALLEGHENY TECHNOLOGIES INC | 20,864,023 | 16.4% | EDGAR |
| SC 13G/A | 2022-01-26 | BlackRock Inc. | ALLEGHENY TECHNOLOGIES INC | 20,864,023 | 16.4% | EDGAR |
| SC 13G/A | 2021-05-10 | Capital International Investors | ALLEGHENY TECHNOLOGIES INC | 13,452,961 | 10.6% | EDGAR |