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The shares were sold in multiple transactions at prices ranging from $75.87 to to $76.33.  The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported."}],"balance_after":306538.3409,"source":{"system":"sec-edgar","filing":"0000950170-25-104274","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1018963/000095017025104274/ownership.xml","form_type":"4"}},{"id":1073353,"issuer":{"id":944,"kind":"organization","name":"ATI INC","symbol":"ATI"},"owners":[{"id":26480,"kind":"person","name":"WETHERBEE ROBERT S","position":1,"cik":"0001572385","reported_name":"WETHERBEE ROBERT S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock, par value $0.10 per share","published_at":"2025-08-06T21:43:32.000Z","date":"2025-08-05","kind":"sale","planned":true,"acquired":false,"shares":7220,"price":75.3,"value":543666.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares sold pursuant to a 10b5-1 Trading Plan dated December 12, 2025, entered into for personal tax and estate planning purposes."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price.  The shares were sold in multiple transactions at prices ranging from $74.87 to to $75.86.  The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported."}],"balance_after":308541.3409,"source":{"system":"sec-edgar","filing":"0000950170-25-104274","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1018963/000095017025104274/ownership.xml","form_type":"4"}},{"id":1073352,"issuer":{"id":944,"kind":"organization","name":"ATI INC","symbol":"ATI"},"owners":[{"id":26480,"kind":"person","name":"WETHERBEE ROBERT S","position":1,"cik":"0001572385","reported_name":"WETHERBEE ROBERT S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock, par value $0.10 per share","published_at":"2025-08-06T21:43:32.000Z","date":"2025-08-05","kind":"sale","planned":true,"acquired":false,"shares":40777,"price":74.48,"value":3037070.96,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares sold pursuant to a 10b5-1 Trading Plan dated December 12, 2025, entered into for personal tax and estate planning purposes."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price.  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These shares were sold in multiple transactions at prices ranging from $84.16 to $84.50.  The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported."}],"balance_after":356538.3409,"source":{"system":"sec-edgar","filing":"0000950170-25-086994","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1018963/000095017025086994/ownership.xml","form_type":"4"}},{"id":1110324,"issuer":{"id":944,"kind":"organization","name":"ATI INC","symbol":"ATI"},"owners":[{"id":26480,"kind":"person","name":"WETHERBEE ROBERT S","position":1,"cik":"0001572385","reported_name":"WETHERBEE ROBERT S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock, par value $0.10 per share","published_at":"2025-06-16T23:53:56.000Z","date":"2025-06-12","kind":"sale","planned":true,"acquired":false,"shares":25531,"price":84.3,"value":2152263.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares sold pursuant to a 10b5-1 Trading Plan dated December 12, 2024, entered into for personal tax and estate planning purposes."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $83.15 to $84.15.  The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the SEC, upon request, full information regarding the number of shares sold at each specific price within the range reported."}],"balance_after":367902.3409,"source":{"system":"sec-edgar","filing":"0000950170-25-086994","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1018963/000095017025086994/ownership.xml","form_type":"4"}},{"id":1110323,"issuer":{"id":944,"kind":"organization","name":"ATI INC","symbol":"ATI"},"owners":[{"id":26480,"kind":"person","name":"WETHERBEE ROBERT S","position":1,"cik":"0001572385","reported_name":"WETHERBEE ROBERT S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock, par value $0.10 per share","published_at":"2025-06-16T23:53:56.000Z","date":"2025-06-12","kind":"sale","planned":true,"acquired":false,"shares":13105,"price":82.89,"value":1086273.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares sold pursuant to a 10b5-1 Trading Plan dated December 12, 2024, entered into for personal tax and estate planning purposes."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $82.14 to $83.14.  The reporting person undertakes to provide to the Issuer, its security holders and the Staff of the U. S. 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