Form 4 Filing for Builders FirstSource, Inc.

Jonathan P. Cope, President - Commercial of Builders FirstSource, Inc., reported transactions on March 15, 2026. Cope disposed of 739 shares of common stock with a par value of $0.01 per share at a price of $88.09 per share, totaling 739 shares. This disposal was to cover tax withholding requirements on previously granted restricted stock units. Following this transaction, Cope owns 8094 shares. Additionally, Cope acquired 5676 restricted stock units under the company's 2014 Incentive Plan. These units vest in increments through March 15, 2029, with each unit entitling Cope to one share of common stock upon vesting. The acquisition price was $0.00 per unit. Post-acquisition, Cope holds 13770 shares.