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The restricted stock units vest on June 15, 2022 and entitle the reporting person to one share of common stock for each restricted stock unit that vests."}],"balance_after":75353,"source":{"system":"sec-edgar","filing":"0001209191-21-041403","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182714/000120919121041403/doc4.xml","form_type":"4"}},{"id":2683011,"issuer":{"id":3725,"kind":"organization","name":"Builders FirstSource, Inc.","symbol":"BLDR"},"owners":[{"id":32531,"kind":"person","name":"OLEARY JAMES","position":1,"cik":"0001182714","reported_name":"OLEARY JAMES","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $0.01 per share","published_at":"2021-06-03T20:06:07.000Z","date":"2021-06-01","kind":"grant","acquired":true,"shares":590,"price":44.47,"value":26237.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2014 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy."}],"balance_after":71894,"source":{"system":"sec-edgar","filing":"0001209191-21-037607","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182714/000120919121037607/doc4.xml","form_type":"4"}},{"id":2819756,"issuer":{"id":3725,"kind":"organization","name":"Builders FirstSource, Inc.","symbol":"BLDR"},"owners":[{"id":32531,"kind":"person","name":"OLEARY JAMES","position":1,"cik":"0001182714","reported_name":"OLEARY JAMES","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $0.01 per share","published_at":"2021-03-02T21:05:31.000Z","date":"2021-03-01","kind":"grant","acquired":true,"shares":951,"price":44.84,"value":42642.84,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2014 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy."}],"balance_after":71304,"source":{"system":"sec-edgar","filing":"0001209191-21-015837","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182714/000120919121015837/doc4.xml","form_type":"4"}},{"id":2902128,"issuer":{"id":3725,"kind":"organization","name":"Builders FirstSource, Inc.","symbol":"BLDR"},"owners":[{"id":32531,"kind":"person","name":"OLEARY JAMES","position":1,"cik":"0001182714","reported_name":"OLEARY JAMES","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $0.01 per share","published_at":"2021-01-20T22:10:28.000Z","date":"2021-01-15","kind":"grant","acquired":true,"shares":1660,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest on January 15, 2022 and entitle the reporting person to one share of common stock for each restricted stock unit that vests."}],"balance_after":70353,"source":{"system":"sec-edgar","filing":"0001209191-21-004374","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1182714/000120919121004374/doc4.xml","form_type":"4"}},{"id":4613028,"issuer":{"id":3725,"kind":"organization","name":"Builders FirstSource, Inc.","symbol":"BLDR"},"owners":[{"id":32531,"kind":"person","name":"OLEARY JAMES","position":1,"cik":"0001182714","reported_name":"OLEARY JAMES","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $0.01 per share","published_at":"2021-01-05T22:45:18.000Z","date":"2021-01-01","kind":"grant","acquired":true,"shares":68693,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Received in exchange for 44,689 shares of BMC Stock Holdings, Inc. (\"BMC\") common stock, par value $0.01 per share, and 7,649 restricted stock units of BMC in connection with the completion of the merger (the \"Merger\"), on January 1, 2021 (the \"Effective Date\"), of Boston Merger Sub I Inc., a subsidiary of the Issuer, with and into BMC, pursuant to the Agreement and Plan of Merger, dated as of August 26, 2020 (the \"Merger Agreement\"). 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(\"BFS\"), Boston Merger Sub I Inc. (\"Merger Sub\"), and BMC Stock Holdings, Inc. (\"BMC\"), pursuant to which Merger Sub merged with and into BMC, with BMC surviving as a wholly owned subsidiary of BFS. At the effective time of such merger, each outstanding BMC restricted stock unit vested and settled into 1.3125 shares of BFS common stock in accordance with the Merger Agreement and each share of BMC common stock was converted into the right to receive 1.3125 shares of BFS common stock in accordance with the Merger Agreement."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents a disposition in connection with the Agreement and Plan of Merger, dated as of August 26, 2020 (the \"Merger Agreement\"), by and among Builders FirstSource, Inc. (\"BFS\"), Boston Merger Sub I Inc. (\"Merger Sub\"), and BMC Stock Holdings, Inc. (\"BMC\"), pursuant to which Merger Sub merged with and into BMC, with BMC surviving as a wholly owned subsidiary of BFS. 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