Jonathan P. Cope - 15 Mar 2026 Form 4 Insider Report for Builders FirstSource, Inc. (BLDR)

Role: President - Commercial
Signature: /s/ Minator Azemi, by power of attorney
Issuer symbol: BLDR
Transactions as of: 15 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 17 Mar 2026, 19:05:10 UTC
Previous filing: 18 Mar 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cope Jonathan P	President - Commercial	6031 CONNECTION DRIVE, SUITE 400, IRVING	/s/ Minator Azemi, by power of attorney	17 Mar 2025	0002027726

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLDR	Common Stock, par value $0.01 per share	Tax liability		-739	-8.4%	$88.09^*	8,094	15 Mar 2026	Direct	F1
transaction	BLDR	Common Stock, par value $0.01 per share	Award		+5,676	+70%	$0.000000^*	13,770	15 Mar 2026	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Reflects shares withheld to pay tax withholding requirements on vesting of previously granted restricted stock units.
F2	Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest in 33.33% increments on each of March 15, 2027-2029 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.