| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/10/2023 | ATI INC | ATI | Sale | Common Stock, par value $0.10 per share | 12.9k | $43.57 | $560.2k | | 08/10/2023 |
| 02/24/2023 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 1.9k | $39.45 | $74.6k | | 02/23/2023 |
| 02/23/2023 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 4.1k | $40.51 | $166.9k | | 02/23/2023 |
| 02/23/2023 | ATI INC | ATI | Grant | Common Stock, par value $0.10 per share | 9.4k | $0.00 | $0 | | 02/23/2023 |
| 01/04/2023 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 5.7k | $30.38 | $173.2k | | 01/03/2023 |
| 01/04/2023 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 3.3k | $30.38 | $99.6k | | 01/03/2023 |
| 01/03/2023 | ATI INC | ATI | Grant | Common Stock, par value $0.10 per share | 10.1k | $0.00 | $0 | | 01/03/2023 |
| 05/06/2022 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 2.6k | $26.39 | $69.6k | | 05/06/2022 |
| 02/28/2022 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 2.3k | $25.70 | $58.8k | | 02/28/2022 |
| 01/04/2022 | ATI INC | ATI | Grant | Performance Stock Unit | 51.3k | $0.00 | $0 | | 01/04/2022 |
| 01/04/2022 | ATI INC | ATI | Grant | Common Stock, par value $0.10 per share | 22.5k | $0.00 | $0 | | 01/04/2022 |
| 01/04/2022 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 5.9k | $16.74 | $98.8k | | 01/04/2022 |
| 03/01/2021 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 2.3k | $20.69 | $47k | | 03/01/2021 |
| 02/24/2021 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 2.1k | $21.28 | $44k | | 02/24/2021 |
| 02/27/2020 | ATI INC | ATI | Payment of Exercise | Common Stock, par value $0.10 per share | 2.2k | $18.12 | $39.1k | | 02/27/2020 |
| 02/24/2020 | ATI INC | ATI | Grant | Common Stock, $0.10 par value per share | 13k | $0.00 | $0 | | 02/24/2020 |
| 08/14/2019 | ATI INC | ATI | Purchase | Common Stock, par value $0.10 per share | 2.9k | $17.80 | $51.6k | | 08/14/2019 |