0001959173-24-000865.txt : 20240212 0001959173-24-000865.hdr.sgml : 20240212 20240212095927 ACCESSION NUMBER: 0001959173-24-000865 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240212 DATE AS OF CHANGE: 20240212 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ATI INC CENTRAL INDEX KEY: 0001018963 STANDARD INDUSTRIAL CLASSIFICATION: STEEL PIPE & TUBES [3317] ORGANIZATION NAME: 04 Manufacturing IRS NUMBER: 251792394 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-12001 FILM NUMBER: 24617803 BUSINESS ADDRESS: STREET 1: 2021 MCKINNEY AVENUE CITY: DALLAS STATE: TX ZIP: 75201 BUSINESS PHONE: 4123942800 MAIL ADDRESS: STREET 1: 2021 MCKINNEY AVENUE CITY: DALLAS STATE: TX ZIP: 75201 FORMER COMPANY: FORMER CONFORMED NAME: ALLEGHENY TECHNOLOGIES INC DATE OF NAME CHANGE: 19991213 FORMER COMPANY: FORMER CONFORMED NAME: ALLEGHENY TELEDYNE INC DATE OF NAME CHANGE: 19960716 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Harris Timothy J CENTRAL INDEX KEY: 0001776844 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O ALLEGHENY TECHNOLOGIES INCORPORATED CITY: PITTSBURGH STATE: PA ZIP: 15222 144 1 primary_doc.xml 144 0001776844 XXXXXXXX LIVE 0001018963 ATI INC 001-12001 2021 MCKINNEY AVENUE DALLAS TX 75201 4123942800 Harris Timothy J Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

6325 268433.00 127577212 02/12/2024 NYSE Common 01/04/2023 Restricted Stock Vesting Issuer N 5845 01/04/2023 Compensation Common 05/06/2022 Restricted Stock Vesting Issuer N 480 05/06/2022 Compensation Y 02/12/2024 11/14/2023 /s/ Jared Cook, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Timothy J. Harris