| 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 | 2025-11-25 | 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 | -$242K | -2.6K | -10.88% | $93.26 | 21.3K | Nov 21, 2025 | Direct |