X0508 4 2025-11-19 0001018963 ATI INC ATI 0001229771 BALL M LEROY C/O ATI INC. 2021 MCKINNEY AVE., SUITE 1100 DALLAS TX 75201 true false false false false Common Stock, par value $0.10 per share 2025-11-19 4 G false 185 0 D 34182 D Shares donated to one or more charitable organizations as a bona fide gift. /s/ Amanda J. Skov, Attorney-in-Fact for Leroy M. Ball, Jr. 2025-11-20