BUILDERS FIRSTSOURCE INC (BLDR) Stock Institutional Trading Activity


BUILDERS FIRSTSOURCE INC (BLDR) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Brave Warrior Advisors, Renaissance Technologies LLC, Turtle Creek Asset Management, Giverny Capital, and Parnassus Endeavor Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2019Renaissance Technologies LLCBuy1,394,7194,126,819$104,862
Q4 2019Conifer ManagementBuy6,819,6406,819,640$173,287
Q3 2019Sequoia FundSell-8,600,48972,991$1,502
Q3 2019Ancient Art (Teton Capital)Sell-177,200726,716$14,952
Q3 2019Renaissance Technologies LLCBuy963,3002,732,100$56,213
Q2 2019Ancient Art (Teton Capital)Sell-111,011903,916$15,240
Q2 2019Renaissance Technologies LLCBuy807,4001,768,800$29,822
Q1 2019Renaissance Technologies LLCBuy432,532961,400$12,825
Q1 2019Sequoia FundBuy10,0008,673,480$115,704
Q4 2018Renaissance Technologies LLCBuy260,838528,868$5,770
Q4 2018Ancient Art (Teton Capital)Buy544,1561,014,927$11,073
Q4 2018Sequoia FundBuy1,050,5868,663,480$94,519
Q3 2018Renaissance Technologies LLCSell-505,970268,030$3,935
Q3 2018Ancient Art (Teton Capital)Sell-1,180,869470,771$6,911
Q3 2018Sequoia FundBuy2,005,5177,612,894$111,757
Q2 2018Sequoia FundBuy1,600,0005,607,377$102,559
Q1 2018Renaissance Technologies LLCSell-218,400774,000$15,356
Q1 2018Sequoia FundBuy4,007,3774,007,377$78,585
Q4 2017Renaissance Technologies LLCSell-122,800992,400$21,624
Q3 2017Renaissance Technologies LLCBuy558,1001,115,200$20,062
Q2 2017Renaissance Technologies LLCSell-46,593557,100$8,535
Q2 2017Ancient Art (Teton Capital)Sell-475,9551,651,640$25,303
Q1 2017Renaissance Technologies LLCBuy232,893603,693$8,995
Q1 2017Ancient Art (Teton Capital)Sell-86,8002,127,595$31,701
Q4 2016Renaissance Technologies LLCSell-5,200370,800$4,068
Q4 2016Ancient Art (Teton Capital)Buy1,129,9252,214,395$24,292
Q3 2016Renaissance Technologies LLCSell-646,500376,000$4,328
Q2 2016Ancient Art (Teton Capital)Buy284,7421,084,470$12,200
Q1 2016Ancient Art (Teton Capital)Buy799,728799,728$9,013
Q1 2016Renaissance Technologies LLCBuy295,9001,022,500$11,524

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.