Who owns Builders Firstsource Inc (BLDR)?
289 US mutual funds and ETFs from 138 fund families reported a position in BLDR for the quarter ending 2026-06-30. Against their own report a quarter earlier, 75 raised shares, 34 opened a new position, 104 cut and 48 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Vanguard Index Funds | 4 | 38.0% |
| Ishares Trust | 17 | 13.8% |
| American Funds Fundamental Investors | 1 | 9.9% |
| Spdr Series Trust | 8 | 4.1% |
| Smallcap World Fund Inc | 1 | 4.0% |
| Diamond Hill Funds | 4 | 3.9% |
Tracked managers holding BLDR
| Investor | Book weight |
|---|---|
| Chris Bloomstran · Semper Augustus | 5.6% |
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about BLDR. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
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