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The reporting person undertakes to provide Griffon Corporation, any security holder of Griffon Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares disposed of at each price within the ranges set forth in footnotes (1), (2) and  (3) to this Form 4."}],"balance_after":803595,"source":{"system":"sec-edgar","filing":"0001628280-26-044400","document":"wk-form4_1781816413.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/50725/000162828026044400/wk-form4_1781816413.xml","form_type":"4"}},{"id":737240,"issuer":{"id":3998,"kind":"organization","name":"GRIFFON CORP"},"owners":[{"id":23924,"kind":"person","name":"MEHMEL ROBERT F","position":1,"cik":"0001201289","reported_name":"MEHMEL ROBERT F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2026-06-16T20:59:57.000Z","date":"2026-06-15","kind":"sale","planned":true,"acquired":false,"shares":3272,"price":95.4,"value":312148.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  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The reporting person undertakes to provide Griffon Corporation, any security holder of Griffon Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares disposed of at each price within the ranges set forth in footnotes (1) and  (2) to this Form 4."}],"balance_after":809788,"source":{"system":"sec-edgar","filing":"0001628280-26-043609","document":"wk-form4_1781643594.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/50725/000162828026043609/wk-form4_1781643594.xml","form_type":"4"}},{"id":984685,"issuer":{"id":3998,"kind":"organization","name":"GRIFFON CORP"},"owners":[{"id":23924,"kind":"person","name":"MEHMEL ROBERT F","position":1,"cik":"0001201289","reported_name":"MEHMEL ROBERT F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2025-12-02T21:31:45.000Z","date":"2025-11-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":26928,"price":75,"value":2019600.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by or delivered to the registrant upon vesting of restricted stock to satisfy tax withholding obligations of the reporting person."}],"balance_after":815289,"source":{"system":"sec-edgar","filing":"0001628280-25-054783","document":"wk-form4_1764711103.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/50725/000162828025054783/wk-form4_1764711103.xml","form_type":"4"}},{"id":994915,"issuer":{"id":3998,"kind":"organization","name":"GRIFFON CORP"},"owners":[{"id":23924,"kind":"person","name":"MEHMEL ROBERT F","position":1,"cik":"0001201289","reported_name":"MEHMEL ROBERT F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2025-11-19T22:32:15.000Z","date":"2025-11-18","kind":"grant","planned":false,"acquired":true,"shares":68432,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Restricted shares granted under the Company's 2016 Equity Incentive Plan in a transaction exempt under Rule 16b.  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