Builders FirstSource Inc (BLDR)
Who owns Builders FirstSource Inc (BLDR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.1% of the shares are freely tradable; institutional investors hold 101.9%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 11.51 | 12,377,575 | -0.4 | 12/31/2025 |
| BlackRock Inc | 8.15 | 8,761,277 | -1.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.53 | 7,027,074 | +0.0 | 03/31/2026 |
| State Street Corp | 4.76 | 5,120,090 | +0.2 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.02 | 4,318,795 | +0.0 | 03/31/2026 |
| Wellington Management Company LLP | 3.42 | 3,679,457 | +10.9 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 2.76 | 2,967,744 | +12.3 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 2.74 | 2,943,131 | +16.5 | 03/31/2026 |
| Geode Capital Management, LLC | 2.68 | 2,884,519 | +2.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.12 | 3,359,579 | +0.2 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 18. Jul 2026 | O'Brien Matthew Coley | Chief Human Resources Officer | Other | 7,406 | 0.00 | – |
| 18. Jul 2026 | Vaughn Paul | President - West Division | Other | 3,366 | 0.00 | – |
| 18. Jul 2026 | Vance Todd | President - East Division | Other | 3,366 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.