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 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Semper Augustus Investments Group, Turtle Creek Asset Management, Brave Warrior Advisors, Tweedy, Browne Co All Funds (US), and Parnassus Endeavor Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2021Sequoia FundSell-6,56171,523$3,317
Q4 2020Conifer ManagementSell-2,200,0005,000,000$204,050
Q4 2020Renaissance Technologies LLCSell-712,019413,200$16,863
Q4 2020Ancient Art (Teton Capital)Buy50,0001,169,191$47,715
Q4 2020Sequoia FundSell-1,37778,084$3,187
Q3 2020Conifer ManagementSell-2,800,0007,200,000$234,864
Q3 2020Renaissance Technologies LLCSell-1,798,3001,125,219$36,705
Q3 2020Ancient Art (Teton Capital)Buy387,8601,119,191$36,508
Q3 2020Sequoia FundSell-10179,461$2,592
Q2 2020Renaissance Technologies LLCSell-1,432,0002,923,519$60,517
Q2 2020Ancient Art (Teton Capital)Sell-174,361731,331$15,139
Q2 2020Sequoia FundSell-1,31979,562$1,647
Q1 2020Conifer ManagementBuy3,180,36010,000,000$122,300
Q1 2020Ancient Art (Teton Capital)Buy519,685905,692$11,077
Q1 2020Renaissance Technologies LLCBuy228,7004,355,519$53,268
Q1 2020Sequoia FundBuy7,76080,881$989
Q4 2019Conifer ManagementBuy6,819,6406,819,640$173,287
Q4 2019Renaissance Technologies LLCBuy1,394,7194,126,819$104,862
Q4 2019Ancient Art (Teton Capital)Sell-340,709386,007$9,808
Q4 2019Sequoia FundBuy13073,121$1,858
Q3 2019Sequoia FundSell-8,600,48972,991$1,502
Q3 2019Renaissance Technologies LLCBuy963,3002,732,100$56,213
Q3 2019Ancient Art (Teton Capital)Sell-177,200726,716$14,952
Q2 2019Renaissance Technologies LLCBuy807,4001,768,800$29,822
Q2 2019Ancient Art (Teton Capital)Sell-111,011903,916$15,240
Q1 2019Renaissance Technologies LLCBuy432,532961,400$12,825
Q1 2019Sequoia FundBuy10,0008,673,480$115,704
Q4 2018Sequoia FundBuy1,050,5868,663,480$94,519
Q4 2018Ancient Art (Teton Capital)Buy544,1561,014,927$11,073
Q4 2018Renaissance Technologies LLCBuy260,838528,868$5,770

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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