    <SEC-DOCUMENT>0000950170-25-054239-index.html : 20250415
    <SEC-HEADER>0000950170-25-054239.hdr.sgml : 20250415
    <ACCEPTANCE-DATETIME>20250415160603
    ACCESSION NUMBER:		0000950170-25-054239
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20250415
    DATE AS OF CHANGE:		20250415

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Builders FirstSource, Inc.
    		CENTRAL INDEX KEY:			0001316835
    		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-LUMBER & OTHER BUILDING MATERIALS DEALERS [5211]
    		ORGANIZATION NAME:           	07 Trade & Services
    		EIN:				522084569
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-40620
    		FILM NUMBER:		25839531

    	BUSINESS ADDRESS:
    		STREET 1:		6031 CONNECTION DR., STE. 400
    		CITY:			IRVING
    		STATE:			TX
    		ZIP:			75039
    		BUSINESS PHONE:		(214) 880-3500

    	MAIL ADDRESS:
    		STREET 1:		6031 CONNECTION DR., STE. 400
    		CITY:			IRVING
    		STATE:			TX
    		ZIP:			75039
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>bldr_2025_defa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: bldr_2025_defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img140682603_0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img140682603_0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img140682603_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img140682603_1.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>