X0306 4 2017-11-15 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 2017-11-15 4 A 0 5802 0.00 A 1000335 D Common Stock, par value $0.01 per share 2017-11-15 4 A 0 3839 18.47 A 1004174 D Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest on November 15, 2018 and entitle the reporting person to one share of common stock for each restricted stock unit that vests. 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. /s/ Jeffrey A. Wier by power of attorney 2017-11-17