Builders FirstSource, Inc. (BLDR) ownership: Top institutional holder: VANGUARD GROUP INC ($1.27B). Insider activity: Net Seller (0 buys, 20 sells). 6 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 12377575.00 | $1.27B | 2025-12-31 |
| BlackRock, Inc. | 8761277.00 | $721.32M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 7027074.00 | $578.54M | 2026-03-31 |
| STATE STREET CORP | 5120090.00 | $421.54M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4318795.00 | $355.57M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3679457.00 | $302.93M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 2967744.00 | $244.30M | 2026-03-31 |
| Capital International Investors | 2943131.00 | $242.31M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-07-18 | |
| Sell | null | 2026-07-18 | |
| Sell | null | 2026-07-18 | |
| Sell | null | 2026-06-13 | |
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.