X0508 4 2025-11-19 0001018963 ATI INC ATI 0002096540 Lydon-Rodgers Jean 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 A false 631 0 A 631 D Annual award of restricted stock granted under the Issuer's 2022 Incentive Plan as part of the Issuer's Director compensation program. The award vests on the first anniversary of the grant date. Annual award granted under the Issuer's 2022 Incentive Plan as part of the Issuer's Director compensation program. /s/ Amanda J. Skov, Attorney-in-Fact for Jean Lydon-Rodgers 2025-11-21