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.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Op Asset Management LtdSell-20,830-100.0%0$0.00Q2 2026Sep 28, 2026
Envestnet Asset Management IncSell-24,482-7.7%291,864$26.12MQ2 2026Sep 23, 2026
Qrg Capital Management, Inc.Buy+57+1.8%3,301$295.40KQ2 2026Sep 23, 2026
State Street CorpSell-280,332-5.5%4,839,758$433.07MQ2 2026Sep 22, 2026
Anchor Investment Management, LlcBuy+350+93.3%725$64.87KQ2 2026Sep 15, 2026
Palogic Value Management, L.P.Buy+16,277—16,277$1.46MQ2 2026Sep 09, 2026
Manufacturers Life Insurance Company, TheBuy+1,701+2.1%81,775$7.32MQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustSell-304-53.4%265$23.71KQ2 2026Sep 04, 2026
Anchor Capital Advisors LlcSell-11,920-3.4%336,660$30.12MQ2 2026Sep 03, 2026
Allianz Asset Management GmbhBuy+383,708+174.6%603,440$54.00MQ2 2026Sep 02, 2026
Citadel Advisors LlcSell-71,763-13.4%465,506$41.65MQ2 2026Sep 02, 2026
Cornerstone Financial Management LlcBuy+2+40.0%7$626.00Q2 2026Aug 28, 2026
Corient Private Wealth LlcSell-4,025-10.4%34,841$3.12MQ2 2026Aug 27, 2026
Giverny CapitalSell-349-0.4%91,464$8.18MQ2 2026Aug 26, 2026
California State Teachers Retirement SystemSell-39,752-24.1%124,920$11.18MQ2 2026Aug 24, 2026
First Eagle U.S. ValueBuy+167—167$14.94KQ2 2026Aug 24, 2026
Cyber Hornet Etfs LlcSell-9-3.0%296$26.49KQ2 2026Aug 24, 2026
Assenagon Asset Management S.A.Buy+88,580+1169.1%96,157$8.60MQ2 2026Aug 21, 2026
Rehmann Capital Advisory GroupBuy+308+2.7%11,884$1.06MQ2 2026Aug 20, 2026
Kingsview Wealth Management, LlcBuy+3,826—3,826$342.35KQ2 2026Aug 19, 2026
Mercer Global Advisors IncSell-3,727-11.4%28,910$2.59MQ2 2026Aug 19, 2026
Fulcrum Asset Management LlpBuy+22,819—22,819$2.07MQ2 2026Aug 18, 2026
Rakuten Investment Management, Inc.Sell-5,008-30.5%11,404$1.03MQ2 2026Aug 18, 2026
Jefferies Financial Group Inc.Buy+26,640+291.7%35,772$3.20MQ2 2026Aug 17, 2026
Proficio Capital Partners LlcBuy+4,761—4,761$426.01KQ2 2026Aug 17, 2026
Hauser Brothers GmbhBuy+3,400+2.7%128,900$11.53MQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioSell-1,714-5.4%29,865$2.67MQ2 2026Aug 17, 2026
United Capital Financial Advisors, LlcSell-517-5.9%8,235$736.87KQ2 2026Aug 17, 2026
Empowered Funds, LlcSell-86-0.2%37,453$3.35MQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcSell-20-2.5%775$69.35KQ2 2026Aug 17, 2026
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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.