X0306 4 2017-03-08 0 0001316835 Builders FirstSource, Inc. BLDR 0001110176 LEVY PAUL S 450 LEXINGTON AVENUE, 31ST FLOOR NEW YORK NY 10017 1 0 1 0 Common Stock, par value $0.01 per share 2017-03-08 4 S 0 10000000 14.51 D 14344584 I By JLL Building Holdings, LLC These shares of common stock, par value $0.01 per share, of Builders FirstSource, Inc. (the "Company") are held by JLL Building Holdings, LLC ("JLL Holdings"). JLL Partners Fund V, L.P. is the sole member of JLL Building Holdings, LLC. JLL Associates V, L.P. is the general partner of JLL Partners Fund V, L.P. JLL Associates G.P. V, L.L.C. is the general partner of JLL Associates V, L.P. Mr. Levy serves as a director of JLL Associates G.P. V, L.L.C., with contractual power to direct the disposition of the shares of common stock of the Company held by JLL Holdings. However, Mr. Levy disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein. /s/ Paul S. Levy 2017-03-10