X0306 4 2020-06-17 0 0001316835 Builders FirstSource, Inc. BLDR 0001110176 LEVY PAUL S 245 PARK AVENUE SUITE 1601 NEW YORK NY 10167 1 0 0 0 Common Stock, par value $0.01 per share 2020-06-17 4 A 0 5840 0.00 A 1149970 D Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest on June 17, 2021 and entitle the reporting person to one share of common stock for each restricted stock unit that vests. /s/ Jeffrey A. Wier by power of attorney 2020-06-18