BUILDERS FIRSTSOURCE INC (BLDR) Institutional Ownership Changes & 13F Activity
BUILDERS FIRSTSOURCE INC (BLDR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Allianz Asset Management Gmbh, State Street Corp, Assenagon Asset Management S.A., Citadel Advisors Llc, and California State Teachers Retirement System.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Op Asset Management Ltd | Sell | -20,830 | -100.0% | 0 | $0.00 | Q2 2026 | Sep 28, 2026 |
| Envestnet Asset Management Inc | Sell | -24,482 | -7.7% | 291,864 | $26.12M | Q2 2026 | Sep 23, 2026 |
| Qrg Capital Management, Inc. | Buy | +57 | +1.8% | 3,301 | $295.40K | Q2 2026 | Sep 23, 2026 |
| State Street Corp | Sell | -280,332 | -5.5% | 4,839,758 | $433.07M | Q2 2026 | Sep 22, 2026 |
| Anchor Investment Management, Llc | Buy | +350 | +93.3% | 725 | $64.87K | Q2 2026 | Sep 15, 2026 |
| Palogic Value Management, L.P. | Buy | +16,277 | — | 16,277 | $1.46M | Q2 2026 | Sep 09, 2026 |
| Manufacturers Life Insurance Company, The | Buy | +1,701 | +2.1% | 81,775 | $7.32M | Q2 2026 | Sep 09, 2026 |
| Parkside Financial Bank & Trust | Sell | -304 | -53.4% | 265 | $23.71K | Q2 2026 | Sep 04, 2026 |
| Anchor Capital Advisors Llc | Sell | -11,920 | -3.4% | 336,660 | $30.12M | Q2 2026 | Sep 03, 2026 |
| Allianz Asset Management Gmbh | Buy | +383,708 | +174.6% | 603,440 | $54.00M | Q2 2026 | Sep 02, 2026 |
| Citadel Advisors Llc | Sell | -71,763 | -13.4% | 465,506 | $41.65M | Q2 2026 | Sep 02, 2026 |
| Cornerstone Financial Management Llc | Buy | +2 | +40.0% | 7 | $626.00 | Q2 2026 | Aug 28, 2026 |
| Corient Private Wealth Llc | Sell | -4,025 | -10.4% | 34,841 | $3.12M | Q2 2026 | Aug 27, 2026 |
| Giverny Capital | Sell | -349 | -0.4% | 91,464 | $8.18M | Q2 2026 | Aug 26, 2026 |
| California State Teachers Retirement System | Sell | -39,752 | -24.1% | 124,920 | $11.18M | Q2 2026 | Aug 24, 2026 |
| First Eagle U.S. Value | Buy | +167 | — | 167 | $14.94K | Q2 2026 | Aug 24, 2026 |
| Cyber Hornet Etfs Llc | Sell | -9 | -3.0% | 296 | $26.49K | Q2 2026 | Aug 24, 2026 |
| Assenagon Asset Management S.A. | Buy | +88,580 | +1169.1% | 96,157 | $8.60M | Q2 2026 | Aug 21, 2026 |
| Rehmann Capital Advisory Group | Buy | +308 | +2.7% | 11,884 | $1.06M | Q2 2026 | Aug 20, 2026 |
| Kingsview Wealth Management, Llc | Buy | +3,826 | — | 3,826 | $342.35K | Q2 2026 | Aug 19, 2026 |
| Mercer Global Advisors Inc | Sell | -3,727 | -11.4% | 28,910 | $2.59M | Q2 2026 | Aug 19, 2026 |
| Fulcrum Asset Management Llp | Buy | +22,819 | — | 22,819 | $2.07M | Q2 2026 | Aug 18, 2026 |
| Rakuten Investment Management, Inc. | Sell | -5,008 | -30.5% | 11,404 | $1.03M | Q2 2026 | Aug 18, 2026 |
| Jefferies Financial Group Inc. | Buy | +26,640 | +291.7% | 35,772 | $3.20M | Q2 2026 | Aug 17, 2026 |
| Proficio Capital Partners Llc | Buy | +4,761 | — | 4,761 | $426.01K | Q2 2026 | Aug 17, 2026 |
| Hauser Brothers Gmbh | Buy | +3,400 | +2.7% | 128,900 | $11.53M | Q2 2026 | Aug 17, 2026 |
| Public Employees Retirement System Of Ohio | Sell | -1,714 | -5.4% | 29,865 | $2.67M | Q2 2026 | Aug 17, 2026 |
| United Capital Financial Advisors, Llc | Sell | -517 | -5.9% | 8,235 | $736.87K | Q2 2026 | Aug 17, 2026 |
| Empowered Funds, Llc | Sell | -86 | -0.2% | 37,453 | $3.35M | Q2 2026 | Aug 17, 2026 |
| Transamerica Financial Advisors, Llc | Sell | -20 | -2.5% | 775 | $69.35K | Q2 2026 | Aug 17, 2026 |
Frequently asked questions about BLDR activity
Which institutional owners are buying BLDR?
Institutional owners buying BLDR include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in BLDR activity?
"Buy" means an investor increased their reported position in BLDR compared to the prior reporting period. This reflects growing exposure to BUILDERS FIRSTSOURCE INC (BLDR) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in BLDR increasing?
Institutional interest in BLDR can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
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