Builders FirstSource Inc
Ownership
Ownership Structure
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%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.28 | 7,833,417 | -10.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.37 | 6,854,631 | -2.5 | 06/30/2026 |
| State Street Corp | 4.50 | 4,839,758 | -5.5 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 3.87 | 4,162,116 | -3.6 | 06/30/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.63 | 3,907,321 | +32.8 | 06/30/2026 |
| Pictet Asset Manangement SA | 3.53 | 3,801,076 | +175.8 | 06/30/2026 |
| Wellington Management Company LLP | 3.22 | 3,465,251 | -5.8 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.20 | 3,439,279 | +15.9 | 06/30/2026 |
| Amvescap Plc. | 3.11 | 3,346,367 | +28.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.96 | 6,409,016 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Levy Paul S | Director | 1,732,002 | 117,429,736 $ | Sep 10, 2026 | direct |
| Steinke Craig Arthur | Director | 102,626 | 6,958,043 $ | Sep 10, 2026 | direct |
| Oleary James | Director | 91,795 | 6,223,701 $ | Sep 10, 2026 | direct |
| Hiller Michael | COO-Designate | 64,950 | 4,403,610 $ | Oct 18, 2026 | direct |
| Vance Todd | President - East Division | 42,684 | 2,893,975 $ | Jul 18, 2026 | direct |
| Vaughn Paul | President - West Division | 40,724 | 2,761,087 $ | Jul 18, 2026 | direct |
| Christophe Cleveland A | Director | 38,762 | 2,628,064 $ | Sep 10, 2026 | direct |
| Boydston Cory Jacobs | Director | 27,191 | 1,843,550 $ | Sep 10, 2026 | direct |
| Hayes William B | Director | 20,221 | 1,370,984 $ | Sep 10, 2026 | direct |
| Charles Dirkson R | Director | 14,766 | 1,001,135 $ | Sep 10, 2026 | direct |
| O'Brien Matthew Coley | Chief Human Resources Officer | 7,406 | 502,127 $ | Jul 18, 2026 | direct |
| Renz Maria | Director | 6,870 | 465,786 $ | Sep 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 18, 2026 | Hiller Michael | COO-Designate | Other | 12,808 | 0.00 | – |
| Sep 10, 2026 | Steinke Craig Arthur | Director | Other | 564 | 0.00 | – |
| Sep 10, 2026 | Charles Dirkson R | Director | Other | 470 | 0.00 | – |
| Sep 10, 2026 | Oleary James | Director | Other | 564 | 0.00 | – |
| Sep 10, 2026 | Renz Maria | Director | Other | 489 | 0.00 | – |
| Sep 10, 2026 | Levy Paul S | Director | Other | 1,204 | 0.00 | – |
| Sep 10, 2026 | Hayes William B | Director | Other | 583 | 0.00 | – |
| Sep 10, 2026 | Christophe Cleveland A | Director | Other | 564 | 0.00 | – |
| Sep 10, 2026 | Boydston Cory Jacobs | Director | Other | 470 | 0.00 | – |
| Jul 18, 2026 | O'Brien Matthew Coley | Chief Human Resources Officer | Other | 7,406 | 0.00 | – |
| Jul 18, 2026 | Vaughn Paul | President - West Division | Other | 3,366 | 0.00 | – |
| Jul 18, 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: November 2, 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.