As of November 6, 2026, Builders FirstSource, Inc. is a publicly traded company (NYSE: BLDR); its largest reported holder is BlackRock, with 12% on Schedule 13G/A of October 5, 2026, then Vanguard (5.13%). The largest insider holding is Paul S. Levy, a director, with 1,732,002 shares (1.6% of shares outstanding), per Form 4 of September 14, 2026 (Schedule 13G/A, October 5, 2026).
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Is Builders FirstSource, Inc. a real, registered company?
- Builders FirstSource Inc files with the SEC under CIK 1316835 (its SEC filings).
- Its shares are listed under the ticker BLDR on NYSE (SEC company record).
- Incorporated in Delaware; business address in Irving, Texas, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Builders FirstSource Inc in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Mike Hiller, Chief Operating Officer (Form 8-K filed 2026-10-16). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Vanguard (filed 2026-10-30).
Who are Builders FirstSource, Inc.'s owners and officers?
Builders FirstSource, Inc.: incorporated in Delaware; business address in Irving, Texas; industry Retail-Lumber & Other Building Materials Dealers (Schedule 13G/A, 2026-10-30).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-30 | Vanguard Capital Management | 5.13% |
| Schedule 13G, 2026-10-30 | Vanguard Portfolio Management | 5.03% |
| Schedule 13G/A, 2026-10-05 | Blackrock, Inc. | 12% |
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 7.2% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-12-05 | Fmr LLC | 3.3% |
Questions about who owns Builders FirstSource, Inc.
Who owns Builders FirstSource, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Builders FirstSource, Inc.: Blackrock, Inc. (12%, Schedule 13G/A, filed 2026-10-05), Vanguard Capital Management (5.13%, Schedule 13G/A, filed 2026-10-30) and Vanguard Portfolio Management (5.03%, Schedule 13G, filed 2026-10-30).
Who are the largest shareholders of Builders FirstSource, Inc.?
By the share each holder's latest filing reports, the largest holders of Builders FirstSource, Inc. on this page are Blackrock, Inc. (12%), Vanguard Capital Management (5.13%) and Vanguard Portfolio Management (5.03%).
When did Blackrock, Inc. buy into Builders FirstSource, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2026-10-05, reporting 12%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Builders FirstSource, Inc. covers
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What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-10-16 | Mike Hiller | Chief Operating Officer | appointed | 2026-05-18 |
| Form 8-K, 2026-06-05 | Mark A. Alexander | departed | ||
| Form 8-K, 2026-05-18 | Mike Hiller | Chief Operating Officer | appointed | 2026-05-18 |
| Form 8-K, 2026-05-18 | Mike Hiller | Chief Talent Officer | appointed |
Which insiders own Builders FirstSource, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 1,732,002 shares (1.6% of shares outstanding) (Form 4, 2026-09-14).
- , the chief executive and president: 272,332 shares (0.25% of shares outstanding) (Form 4, 2026-03-17).
- , the president: 151,247 shares (0.14% of shares outstanding), held indirectly through a trust (Form 4, 2026-03-17).
- , a director: 124,842 shares (0.12% of shares outstanding) (Form 4, 2026-05-18).
- , the chief operating officer: 110,260 shares (0.10% of shares outstanding) (Form 4, 2026-06-10).
Shares outstanding: 107,606,319 as of 2026-10-23, from the company's latest SEC cover page.
How much has Builders FirstSource, Inc. raised?
No fundraising or offering filing from Builders FirstSource, Inc. is on file with us.
Keep reading
More on Builders FirstSource, Inc. and the records around it.
Builders FirstSource, Inc. elsewhere on the record
- Leadership changes Aug 2026
Companies that share a holder
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
- Vanguard Portfolio Management also filed stake reports on 941 other companies: Newmark Group Inc (Nov 2026), A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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