0001193125-26-380514.txt : 20260902 0001193125-26-380514.hdr.sgml : 20260902 20260902174116 ACCESSION NUMBER: 0001193125-26-380514 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260831 FILED AS OF DATE: 20260902 DATE AS OF CHANGE: 20260902 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Harris Timothy J CENTRAL INDEX KEY: 0001776844 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-12001 FILM NUMBER: 261356113 MAIL ADDRESS: STREET 1: C/O ATI INC. STREET 2: 2021 MCKINNEY AVENUE CITY: DALLAS STATE: TX ZIP: 75201 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ATI INC CENTRAL INDEX KEY: 0001018963 STANDARD INDUSTRIAL CLASSIFICATION: STEEL PIPE & TUBES [3317] ORGANIZATION NAME: 04 Manufacturing EIN: 251792394 STATE OF INCORPORATION: DE FISCAL YEAR END: 1228 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 4 1 ownership.xml 4 X0609 4 2026-08-31 0001018963 ATI INC ATI 0001776844 Harris Timothy J false C/O ATI INC. 2021 MCKINNEY AVE., SUITE 1100 DALLAS TX 75201 false true false false Senior VP and CDIO true Common Stock, par value $0.10 per share 2026-08-31 4 S false 16500 210.01 D 130187 D Shares sold pursuant to a 10b5-1 Trading Plan dated May 21, 2026, entered into for personal tax and estate planning purposes. /s/ Amanda J. Skov, Attorney-in-Fact for Timothy J. Harris 2026-09-02