| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Busch Tina Killough | SVP, CHRO | C/O ATI INC., 2021 MCKINNEY AVE., SUITE 1100, DALLAS | /s/ Amanda J. Skov, Attorney-in-Fact for Tina K. Busch | 25 Nov 2025 | 0001949998 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATI | Common Stock, par value $0.10 per share | Sale | $242,289 | -2,598 | -11% | $93.26 | 21,274 | 21 Nov 2025 | Direct |