X0508 4 2024-05-21 0 0001018963 ATI INC ATI 0001241243 HARVEY J BRETT C/O ATI INC. 2021 MCKINNEY AVENUE, SUITE 1100 DALLAS TX 75201 1 0 0 0 0 Common Stock, par value $0.10 per share 2024-05-21 4 A 0 4889 0.00 A 94826 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 J. Brett Harvey 2024-05-23