COSTAR GROUP INC (CSGP) Stock Institutional Trading Activity


COSTAR GROUP INC (CSGP) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q1 2026), investors with some of the largest reported share count changes include Sequoia Financial Advisors, Polen Capital Management, Tiger Global Management, Vulcan Value Partners, and Viking Global Investors. 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
Q1 2022Vulcan Value PartnersSell-153,9486,926,459$461,372
Q1 2022Renaissance Technologies LLCSell-35,900803,780$53,540
Q1 2022Parnassus Endeavor FundBuy2,300,4628,318,337$554,084
Q1 2022Akre Capital ManagementSell-96,1709,668,180$643,997
Q4 2021Bares Capital ManagementSell-80,1103,101,856$245,140
Q4 2021Parnassus Endeavor FundBuy5,630,8756,017,875$475,593
Q4 2021Renaissance Technologies LLCBuy825,600839,680$66,360
Q4 2021Vulcan Value PartnersSell-38,1377,080,407$559,564
Q4 2021Akre Capital ManagementBuy1,3509,764,350$771,677
Q3 2021Bares Capital ManagementSell-4,6043,181,966$273,840
Q3 2021Third PointBuy16,8195,687,819$489,494
Q3 2021Vulcan Value PartnersBuy10,0927,118,544$612,621
Q3 2021Akre Capital ManagementSell-4,6009,763,000$840,204
Q2 2021Bares Capital ManagementBuy2,851,8123,186,570$263,912
Q2 2021Parnassus Endeavor FundBuy348,300387,000$32,051
Q2 2021Third PointBuy5,121,0005,671,000$469,672
Q2 2021Vulcan Value PartnersBuy6,444,8777,108,452$588,722
Q2 2021Akre Capital ManagementBuy8,790,5559,767,600$808,953
Q1 2021Bares Capital ManagementSell-11,295334,758$275,134
Q1 2021Third PointBuy550,000550,000$452,040
Q1 2021Vulcan Value PartnersBuy166,264663,575$545,386
Q1 2021Akre Capital ManagementBuy11,084977,045$803,024
Q4 2020Bares Capital ManagementSell-22,211346,053$319,850
Q4 2020Renaissance Technologies LLCSell-25,91814,080$13,014
Q4 2020Viking Global InvestorsSell-229,19770,949$65,577
Q4 2020Vulcan Value PartnersBuy38,864497,311$459,655
Q4 2020Akre Capital ManagementBuy7,168965,961$892,818
Q3 2020Bares Capital ManagementSell-3,546368,264$312,476
Q3 2020Parnassus Endeavor FundSell-88638,700$32,837
Q3 2020Renaissance Technologies LLCSell-6,60039,998$33,939

Frequently asked questions about CSGP activity

  • Which institutional owners are buying CSGP?

    Institutional owners buying CSGP 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 CSGP activity?

    "Buy" means an investor increased their reported position in CSGP compared to the prior reporting period. This reflects growing exposure to COSTAR GROUP INC (CSGP) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in CSGP increasing?

    Institutional interest in CSGP 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.