Matthew Coley O'Brien - 18 Jul 2026 Form 4 Insider Report for Builders FirstSource, Inc. (BLDR)

Reporting relationship: Chief Human Resources Officer
Issuer ticker: BLDR
Reported as of: 18 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 21 Jul 2026, 16:30:04 UTC
Prior SEC filing: 27 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Alena Brenner, by power of attorney

Key filing fact

Matthew Coley O'Brien filed Form 4 for Builders FirstSource, Inc. (BLDR) on 21 Jul 2026.

Key facts

This page summarizes Matthew Coley O'Brien's Form 4 filing for Builders FirstSource, Inc. (BLDR).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 21 Jul 2026, 16:30.

Change

Previous filing in this sequence was filed on 27 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001732939 Primary reporting owner

O'Brien Matthew Coley

Relationship: Chief Human Resources Officer
Address: C/O BUILDERS FIRSTSOURCE, INC., 6031 CONNECTION DR, STE 400, IRVING
Signature: /s/ Alena Brenner, by power of attorney
Signature date: 21 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BLDR transaction

Common Stock, par value $0.01 per share

Award

Transaction value
Shares: +7,406
Change %
Price: $0.000000^*
Shares after: 7,406
Date: 18 Jul 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Reflects the acquisition of restricted stock units pursuant to the Corporation's 2026 Incentive Plan. The restricted stock units vest in 33.3% increments on each of July 18, 2027-2029 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.