{"cik":1018963,"company":{"entity_status":"ACTIVE","filings":[{"accession":"0001193125-26-398695","document":"xslF345X06/ownership.xml","filed":"2026-09-23","form":"4","items":"","report_date":"2026-09-21"},{"accession":"0001193125-26-393438","document":"xslF345X06/ownership.xml","filed":"2026-09-16","form":"4","items":"","report_date":"2026-09-14"},{"accession":"0001193125-26-387885","document":"xslF345X06/ownership.xml","filed":"2026-09-10","form":"4","items":"","report_date":"2026-09-08"},{"accession":"0001193125-26-383696","document":"xslF345X06/ownership.xml","filed":"2026-09-04","form":"4","items":"","report_date":"2026-09-02"},{"accession":"0001193125-26-380514","document":"xslF345X06/ownership.xml","filed":"2026-09-02","form":"4","items":"","report_date":"2026-08-31"},{"accession":"0001193125-26-368175","document":"xslF345X06/ownership.xml","filed":"2026-08-26","form":"4","items":"","report_date":"2026-08-24"},{"accession":"0001193125-26-357113","document":"xslF345X06/ownership.xml","filed":"2026-08-19","form":"4","items":"","report_date":"2026-08-17"},{"accession":"0001628280-26-054233","document":"ati-20260628.htm","filed":"2026-08-06","form":"10-Q","items":"","report_date":"2026-06-28"},{"accession":"0001628280-26-053856","document":"ati-20260806.htm","filed":"2026-08-06","form":"8-K","items":"2.02,9.01","report_date":"2026-08-06"},{"accession":"0001193125-26-326296","document":"xslF345X06/ownership.xml","filed":"2026-07-30","form":"4","items":"","report_date":"2026-07-28"},{"accession":"0001193125-26-261769","document":"d163250d8k.htm","filed":"2026-06-08","form":"8-K","items":"1.01,2.03,8.01,9.01","report_date":"2026-06-08"},{"accession":"0001193125-26-255755","document":"d74245d8k.htm","filed":"2026-06-03","form":"8-K","items":"8.01,9.01","report_date":"2026-06-03"},{"accession":"0001193125-26-254681","document":"d100672d8k.htm","filed":"2026-06-03","form":"8-K","items":"8.01,9.01","report_date":"2026-06-03"},{"accession":"0001193125-26-230739","document":"d89066d8k.htm","filed":"2026-05-19","form":"8-K","items":"5.07,9.01","report_date":"2026-05-14"},{"accession":"0001628280-26-028684","document":"ati-20260329.htm","filed":"2026-04-30","form":"10-Q","items":"","report_date":"2026-03-29"},{"accession":"0001628280-26-028589","document":"ati-20260430.htm","filed":"2026-04-30","form":"8-K","items":"2.02,9.01","report_date":"2026-04-30"},{"accession":"0001193125-26-121340","document":"d932857ddef14a.htm","filed":"2026-03-24","form":"DEF 14A","items":"","report_date":"2026-05-14"},{"accession":"0001628280-26-010140","document":"ati-20251228.htm","filed":"2026-02-20","form":"10-K","items":"","report_date":"2025-12-28"},{"accession":"0001193125-26-058142","document":"d54551d8k.htm","filed":"2026-02-19","form":"8-K","items":"8.01,9.01","report_date":"2026-02-18"},{"accession":"0001628280-26-004793","document":"ati-20260203.htm","filed":"2026-02-03","form":"8-K","items":"2.02,9.01","report_date":"2026-02-03"},{"accession":"0001193125-25-310681","document":"d170992d8k.htm","filed":"2025-12-08","form":"8-K","items":"5.02,9.01","report_date":"2025-12-04"},{"accession":"0001193125-25-285373","document":"d849921d8k.htm","filed":"2025-11-18","form":"8-K","items":"5.02,9.01","report_date":"2025-11-18"},{"accession":"0001628280-25-046675","document":"ati-20250928.htm","filed":"2025-10-28","form":"10-Q","items":"","report_date":"2025-09-28"},{"accession":"0001628280-25-046559","document":"ati-20251028.htm","filed":"2025-10-28","form":"8-K","items":"2.02,9.01","report_date":"2025-10-28"},{"accession":"0001193125-25-217804","document":"d911457d8k.htm","filed":"2025-09-25","form":"8-K","items":"1.01,2.03,9.01","report_date":"2025-09-19"},{"accession":"0001193125-25-199688","document":"d939196d8k.htm","filed":"2025-09-10","form":"8-K","items":"5.02,9.01","report_date":"2025-09-09"},{"accession":"0001628280-25-036963","document":"ati-20250629.htm","filed":"2025-07-31","form":"10-Q","items":"","report_date":"2025-06-29"},{"accession":"0001628280-25-036845","document":"ati-20250731.htm","filed":"2025-07-31","form":"8-K","items":"2.02,9.01","report_date":"2025-07-31"},{"accession":"0001193125-25-143715","document":"d858646d8k.htm","filed":"2025-06-20","form":"8-K","items":"1.01,2.03","report_date":"2025-06-13"},{"accession":"0001193125-25-123974","document":"d947847d8k.htm","filed":"2025-05-21","form":"8-K","items":"5.03,5.07,9.01","report_date":"2025-05-15"},{"accession":"0001628280-25-021463","document":"ati-20250330.htm","filed":"2025-05-01","form":"10-Q","items":"","report_date":"2025-03-30"},{"accession":"0001628280-25-021324","document":"ati-20250501.htm","filed":"2025-05-01","form":"8-K","items":"2.02,9.01","report_date":"2025-05-01"},{"accession":"0001193125-25-065233","document":"d905229ddef14a.htm","filed":"2025-03-27","form":"DEF 14A","items":"","report_date":"2025-05-16"},{"accession":"0001628280-25-007092","document":"ati-20241229.htm","filed":"2025-02-21","form":"10-K","items":"","report_date":"2024-12-29"},{"accession":"0001628280-25-003579","document":"ati-20250204.htm","filed":"2025-02-04","form":"8-K","items":"2.02,9.01","report_date":"2025-02-04"},{"accession":"0000315066-24-002684","document":"filing.txt","filed":"2024-11-12","form":"SC 13G","items":"","report_date":""},{"accession":"0002012383-24-003725","document":"us01741r1023_110824.txt","filed":"2024-11-08","form":"SC 13G/A","items":"","report_date":""},{"accession":"0001628280-24-044066","document":"ati-20240929.htm","filed":"2024-10-29","form":"10-Q","items":"","report_date":"2024-09-29"},{"accession":"0001628280-24-044003","document":"ati-20241029.htm","filed":"2024-10-29","form":"8-K","items":"2.02,9.01","report_date":"2024-10-29"},{"accession":"0002012383-24-001817","document":"us01741r1023_102324.txt","filed":"2024-10-23","form":"SC 13G/A","items":"","report_date":""}],"former_names":[{"from":"1999-12-13T05:00:00.000Z","name":"ALLEGHENY TECHNOLOGIES INC","to":"2022-06-22T04:00:00.000Z"},{"from":"1996-07-17T04:00:00.000Z","name":"ALLEGHENY TELEDYNE INC","to":"1999-08-25T04:00:00.000Z"}],"gleif_parents":[],"headquarters":[{"latitude":40.44166666666667,"longitude":-80.0,"name":"Pittsburgh","precision":"headquarters locality","source":"wikidata","url":"https://www.wikidata.org/wiki/Q1342"}],"insiders":[{"accession":"0001193125-26-398695","acquired_disposed":"D","code":"S","date":"2026-09-21","derivative":false,"filed":"2026-09-23","following_shares":"88187.0","form":"4","owners":["Harris Timothy J"],"plan_10b5_1":false,"price":"191.82","security":"Common Stock, par value $0.10 per share","shares":"9000.0"},{"accession":"0001193125-26-393438","acquired_disposed":"D","code":"S","date":"2026-09-14","derivative":false,"filed":"2026-09-16","following_shares":"97187.0","form":"4","owners":["Harris Timothy J"],"plan_10b5_1":false,"price":"193.06","security":"Common Stock, par value $0.10 per share","shares":"16500.0"},{"accession":"0001193125-26-387885","acquired_disposed":"D","code":"S","date":"2026-09-08","derivative":false,"filed":"2026-09-10","following_shares":"113687.0","form":"4","owners":["Harris Timothy J"],"plan_10b5_1":false,"price":"207.54","security":"Common Stock, par value $0.10 per share","shares":"16500.0"},{"accession":"0001193125-26-383696","acquired_disposed":"D","code":"S","date":"2026-09-02","derivative":false,"filed":"2026-09-04","following_shares":"35826.0","form":"4","owners":["Morehouse David J"],"plan_10b5_1":false,"price":"201.61","security":"Common Stock, par value $0.10 per share","shares":"2485.0"},{"accession":"0001193125-26-380514","acquired_disposed":"D","code":"S","date":"2026-08-31","derivative":false,"filed":"2026-09-02","following_shares":"130187.0","form":"4","owners":["Harris Timothy J"],"plan_10b5_1":false,"price":"210.01","security":"Common Stock, par value $0.10 per share","shares":"16500.0"},{"accession":"0001193125-26-368175","acquired_disposed":"D","code":"S","date":"2026-08-24","derivative":false,"filed":"2026-08-26","following_shares":"146687.0","form":"4","owners":["Harris Timothy J"],"plan_10b5_1":false,"price":"206.92","security":"Common Stock, par value $0.10 per share","shares":"16500.0"},{"accession":"0001193125-26-357113","acquired_disposed":"D","code":"S","date":"2026-08-17","derivative":false,"filed":"2026-08-19","following_shares":"100719.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"232.43","security":"Common Stock, par value $0.10 per share","shares":"4598.0"},{"accession":"0001193125-26-357113","acquired_disposed":"D","code":"S","date":"2026-08-17","derivative":false,"filed":"2026-08-19","following_shares":"105317.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"231.72","security":"Common Stock, par value $0.10 per share","shares":"9116.0"},{"accession":"0001193125-26-357113","acquired_disposed":"D","code":"S","date":"2026-08-17","derivative":false,"filed":"2026-08-19","following_shares":"114433.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"230.66","security":"Common Stock, par value $0.10 per share","shares":"8131.0"},{"accession":"0001193125-26-357113","acquired_disposed":"D","code":"S","date":"2026-08-17","derivative":false,"filed":"2026-08-19","following_shares":"124564.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"228.32","security":"Common Stock, par value $0.10 per share","shares":"1000.0"},{"accession":"0001193125-26-357113","acquired_disposed":"D","code":"S","date":"2026-08-17","derivative":false,"filed":"2026-08-19","following_shares":"122564.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"229.56","security":"Common Stock, par value $0.10 per share","shares":"2000.0"},{"accession":"0001193125-26-326296","acquired_disposed":"D","code":"S","date":"2026-07-28","derivative":false,"filed":"2026-07-30","following_shares":"125564.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"190.99","security":"Common Stock, par value $0.10 per share","shares":"31757.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"179095.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"182.66","security":"Common Stock, par value $0.10 per share","shares":"11826.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"163187.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"183.5","security":"Common Stock, par value $0.10 per share","shares":"15908.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"158309.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"184.34","security":"Common Stock, par value $0.10 per share","shares":"4878.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"157921.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"185.1","security":"Common Stock, par value $0.10 per share","shares":"388.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"190921.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"181.36","security":"Common Stock, par value $0.10 per share","shares":"2200.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"157321.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"187.5","security":"Common Stock, par value $0.10 per share","shares":"400.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"195321.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"179.25","security":"Common Stock, par value $0.10 per share","shares":"2000.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"193321.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"180.0","security":"Common Stock, par value $0.10 per share","shares":"2000.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"193121.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"180.85","security":"Common Stock, par value $0.10 per share","shares":"200.0"},{"accession":"0001193125-26-299751","acquired_disposed":"D","code":"S","date":"2026-07-07","derivative":false,"filed":"2026-07-09","following_shares":"157721.0","form":"4","owners":["Fields Kimberly A"],"plan_10b5_1":false,"price":"186.36","security":"Common Stock, par value $0.10 per share","shares":"200.0"},{"accession":"0001193125-26-296323","acquired_disposed":"D","code":"M","date":"2026-07-01","derivative":false,"filed":"2026-07-06","following_shares":"57824.0","form":"4","owners":["Foster James Robert"],"plan_10b5_1":false,"price":"193.82","security":"Common Stock, par value $0.10 per share","shares":"163.0"}],"legal_name":"ATI INC.","lei":"ZW1LRE7C3H17O2ZN9B45","lei_status":"ISSUED","lei_updated_at":"2026-09-16T08:23:30Z","names":[{"entity_id":null,"kind":"alias","name":"Allegheny Technologies","source":"wikidata"},{"entity_id":null,"kind":"alias","name":"ATI","source":"wikidata"},{"entity_id":null,"kind":"alias","name":"Allegheny Technologies Incorporated","source":"wikidata"},{"entity_id":null,"kind":"alias","name":"ATI Metals","source":"wikidata"}],"parent_exceptions":["direct-parent: no parent LEI supplied","ultimate-parent: no parent LEI supplied"],"parents":[],"wikidata_id":"Q1361648"},"research_built_at":"2026-10-23T06:11:20.354311+00:00","reviewed_events":[],"reviewed_events_coverage":"selective; not a complete event history; accounting series not reconciled","sources":[{"coverage":"8022 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer","id":"sec","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC submissions","retrieved_at":"2026-10-23T06:12:00.336203+00:00","status":"ok","url":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces"},{"coverage":"1658 unambiguous CIK-linked entities; coverage is incomplete","id":"wikidata","license":"CC0-1.0","license_url":"https://www.wikidata.org/wiki/Wikidata:Licensing","name":"Wikidata structured data","retrieved_at":"2026-10-23T06:12:25.714432+00:00","status":"ok","url":"https://www.wikidata.org/"},{"coverage":"1197 checked identities; 0 unavailable records","id":"gleif","license":"CC0-1.0","license_url":"https://www.gleif.org/en/meta/lei-data-terms-of-use","name":"GLEIF legal entity reference data","retrieved_at":"2026-10-23T06:14:03.968440+00:00","status":"ok","url":"https://www.gleif.org/en/lei-data/gleif-api"},{"coverage":"4 selected series; gaps remain missing","id":"fed","license":"Public domain (selected government series)","license_url":"https://www.federalreserve.gov/disclaimer.htm","name":"Federal Reserve Board H.15","retrieved_at":"2026-10-23T06:27:13.562713+00:00","status":"ok","url":"https://www.federalreserve.gov/releases/h15/"},{"coverage":"9 selected series; gaps remain missing","id":"bls","license":"Public domain","license_url":"https://www.bls.gov/opub/copyright-information.htm","name":"Bureau of Labor Statistics","retrieved_at":"2026-10-23T06:27:14.878114+00:00","status":"ok","url":"https://www.bls.gov/developers/"},{"coverage":"2026 Q3: filings in this completed quarter; not a live transaction feed","id":"insiders","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC insider transactions","retrieved_at":"2026-10-23T06:12:21.860189+00:00","status":"ok","url":"https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets"}]}