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Costar Group, Inc.

CSGP
Exchange
Nasdaq
Industry
Services-Business Services, NEC
SEC CIK
0001057352

In the last 90 days, Costar Group, Inc. insiders filed 1 open-market purchase and 2 sales; 760 institutions reported holding it in 13F filings for Q2 2026, worth $11.7B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.

13F holders, Q2 2021

Institutional positions in Costar Group, Inc. as of Jun 30, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
607
+19 vs. Q1 2021
Shares held
375.3M
+1.70M (+0.5%) vs. Q1 2021Converted for a 10-for-1 split
Total value
$31.1B
+$378.3M (+1.2%) vs. Q1 2021
New holders
86
229 more added
Sold out
67
172 more reduced

5 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2021: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting CSGP on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2021: 607 institutions
Q1 2021: 593 institutionsQ2 2021: 607 institutionsQ3 2021: 594 institutionsQ4 2021: 633 institutionsQ1 2022: 589 institutionsQ2 2022: 591 institutionsQ3 2022: 634 institutionsQ4 2022: 704 institutionsQ1 2023: 692 institutionsQ2 2023: 714 institutionsQ3 2023: 690 institutionsQ4 2023: 737 institutionsQ1 2024: 767 institutionsQ2 2024: 767 institutionsQ3 2024: 773 institutionsQ4 2024: 805 institutionsQ1 2025: 858 institutionsQ2 2025: 873 institutionsQ3 2025: 905 institutionsQ4 2025: 847 institutionsQ1 2026: 797 institutionsQ2 2026: 760 institutions
Value heldQ2 2021: $31.1B
Q1 2021: $31.2BQ2 2021: $31.1BQ3 2021: $32.3BQ4 2021: $29.6BQ1 2022: $25.2BQ2 2022: $23.0BQ3 2022: $28.0BQ4 2022: $30.4BQ1 2023: $26.7BQ2 2023: $35.5BQ3 2023: $30.1BQ4 2023: $34.4BQ1 2024: $38.4BQ2 2024: $29.3BQ3 2024: $30.0BQ4 2024: $28.9BQ1 2025: $33.9BQ2 2025: $34.2BQ3 2025: $34.9BQ4 2025: $28.4BQ1 2026: $16.8BQ2 2026: $11.7B
Institutions holding CSGP and their total value by quarter
QuarterHoldersValue
Q2 2026760$11.7B
Q1 2026797$16.8B
Q4 2025847$28.4B
Q3 2025905$34.9B
Q2 2025873$34.2B
Q1 2025858$33.9B
Q4 2024805$28.9B
Q3 2024773$30.0B
Q2 2024767$29.3B
Q1 2024767$38.4B
Q4 2023737$34.4B
Q3 2023690$30.1B
Q2 2023714$35.5B
Q1 2023692$26.7B
Q4 2022704$30.4B
Q3 2022634$28.0B
Q2 2022591$23.0B
Q1 2022589$25.2B
Q4 2021633$29.6B
Q3 2021594$32.3B
Q2 2021607$31.1B
Q1 2021593$31.2B

Institutions, Q2 2021

Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2021.

Institutions holding CSGP in Q2 2021
InstitutionSharesValue% of portfolioChange in sharesAction
Kestra Advisory Services, LLC6,901$572.0K0.01%−229−3.2%ReducedConverted for a 10-for-1 split
Hengehold Capital Management LLC6,910$572.0K0.08%00.0%UnchangedConverted for a 10-for-1 split
Davenport & Co LLC6,960$576.0K0.00%+4,470+179.5%AddedConverted for a 10-for-1 split
Vestcor Inc6,960$576.0K0.02%+6,610+1,888.6%AddedConverted for a 10-for-1 split
Ground Swell Capital, LLC6,966$577.0K3.13%+4,346+165.9%AddedConverted for a 10-for-1 split
Penserra Capital Management LLC7,040$582.0K0.01%+6,110+657.0%AddedConverted for a 10-for-1 split
People's United Financial, Inc.7,080$586.0K0.01%−310−4.2%ReducedConverted for a 10-for-1 split
George Kaiser Family Foundation7,240$600.0K0.10%00.0%UnchangedConverted for a 10-for-1 split
Knowledge Leaders Capital, LLC7,470$619.0K0.41%+7,470New
First Manhattan Co7,500$621.0K0.00%00.0%UnchangedConverted for a 10-for-1 split
Central Trust Co7,525$623.0K0.02%+7,525New
American International Group, Inc.7,530$624.0K0.00%−1,220−13.9%ReducedConverted for a 10-for-1 split
NewEdge Wealth, LLC7,550$625.0K0.05%00.0%UnchangedConverted for a 10-for-1 split
Integrated Wealth Concepts LLC7,947$658.0K0.02%+277+3.6%AddedConverted for a 10-for-1 split
PDT Partners, LLC7,964$660.0K0.04%+7,964New
Harbour Investments, Inc.8,060$668.0K0.02%00.0%UnchangedConverted for a 10-for-1 split
Hills Bank & Trust Co8,280$685.0K0.10%00.0%UnchangedConverted for a 10-for-1 split
Gilbert & Cook, Inc.8,380$694.0K0.12%+2,600+45.0%AddedConverted for a 10-for-1 split
Nishkama Capital, LLC8,440$699.0K0.26%−45,560−84.4%ReducedConverted for a 10-for-1 split
Hood River Capital Management LLC8,540$707.0K0.02%+2,670+45.5%AddedConverted for a 10-for-1 split
Fulton Breakefield Broenniman LLC8,710$721.0K0.06%+140+1.6%AddedConverted for a 10-for-1 split
Exchange Traded Concepts, LLC8,700$721.0K0.02%+1,930+28.5%AddedConverted for a 10-for-1 split
Equitable Trust Co8,850$733.0K0.05%−390−4.2%ReducedConverted for a 10-for-1 split
Snowden Capital Advisors LLC9,029$747.8K0.04%+4,619+104.7%AddedConverted for a 10-for-1 split
Sigma Planning Corp9,330$773.0K0.02%+650+7.5%AddedConverted for a 10-for-1 split
BP PLC9,370$776.0K0.03%−4,180−30.8%ReducedConverted for a 10-for-1 split
Buckhead Capital Management LLC9,380$777.0K0.17%+1,200+14.7%AddedConverted for a 10-for-1 split
Unigestion Holding SA9,450$787.0K0.03%00.0%UnchangedConverted for a 10-for-1 split
Creative Planning9,520$788.0K0.00%−540−5.4%ReducedConverted for a 10-for-1 split
RMR Wealth Builders9,510$788.0K0.26%00.0%UnchangedConverted for a 10-for-1 split
USS Investment Management Ltd9,580$794.0K0.01%00.0%UnchangedConverted for a 10-for-1 split
Cohen & Steers, Inc.9,590$794.0K0.00%00.0%UnchangedConverted for a 10-for-1 split
Gardner Lewis Asset Management L P9,650$799.0K0.13%00.0%UnchangedConverted for a 10-for-1 split
NEXT Financial Group, Inc9,690$802.0K0.06%+650+7.2%AddedConverted for a 10-for-1 split
Walleye Capital LLC10,035$831.0K0.03%+10,035New
Manufacturers Life Insurance Company, The10,042$832.0K0.00%00.0%UnchangedConverted for a 10-for-1 split
Harbor Advisors LLC10,060$833.0K0.16%00.0%UnchangedConverted for a 10-for-1 split
Bridgefront Capital, LLC10,112$837.0K0.32%+10,112New
Tocqueville Asset Management L.P.10,140$840.0K0.01%00.0%UnchangedConverted for a 10-for-1 split
Ellsworth Advisors, LLC10,290$852.0K0.42%00.0%UnchangedConverted for a 10-for-1 split
Connable Office Inc10,310$854.0K0.12%−540−5.0%ReducedConverted for a 10-for-1 split
Full18 Capital LLC10,310$854.0K0.36%+10,310New
American Portfolios Advisors10,512$870.6K0.03%+142+1.4%AddedConverted for a 10-for-1 split
BBVA USA10,550$874.0K0.05%+10,550New
Motley Fool Asset Management LLC10,634$881.0K0.06%+1,424+15.5%AddedConverted for a 10-for-1 split
Captrust Financial Advisors10,790$894.0K0.01%−8,160−43.1%ReducedConverted for a 10-for-1 split
Y-Intercept (Hong Kong) Ltd11,001$911.0K0.23%+4,481+68.7%AddedConverted for a 10-for-1 split
Optimal Asset Management, Inc.11,069$917.0K0.11%00.0%UnchangedConverted for a 10-for-1 split
IBM Retirement Fund11,080$918.0K0.07%−2,210−16.6%ReducedConverted for a 10-for-1 split
KLK Capital Management LLC11,150$923.0K0.79%+11,150New
Krilogy Financial LLC11,236$931.0K0.09%−744−6.2%ReducedConverted for a 10-for-1 split
Bridges Investment Management Inc11,440$947.0K0.03%00.0%UnchangedConverted for a 10-for-1 split
Magnetar Financial LLC11,604$961.0K0.01%−32,026−73.4%ReducedConverted for a 10-for-1 split
BNP PARIBAS ASSET MANAGEMENT Holding S.A.11,880$984.0K0.00%−1,920−13.9%ReducedConverted for a 10-for-1 split
Boothbay Fund Management, LLC11,966$991.0K0.04%+4,856+68.3%AddedConverted for a 10-for-1 split
Gsa Capital Partners LLP11,994$993.0K0.11%+11,994New
Cannon Global Investment Management, LLC12,000$994.0K2.20%+3,000+33.3%AddedConverted for a 10-for-1 split
Walleye Trading LLC12,262$1.02M0.03%+12,262New
Oak Ridge Investments LLC12,338$1.02M0.09%+148+1.2%AddedConverted for a 10-for-1 split
Private Advisor Group, LLC12,350$1.02M0.01%+1,240+11.2%AddedConverted for a 10-for-1 split
Oribel Capital Management, LP13,000$1.08M0.13%+1,000+8.3%AddedConverted for a 10-for-1 split
Connectus Wealth, LLC13,070$1.08M0.12%+13,070New
Brown Brothers Harriman & Co13,630$1.13M0.01%−260−1.9%ReducedConverted for a 10-for-1 split
D.A. Davidson & Co.13,646$1.13M0.01%+5,756+73.0%AddedConverted for a 10-for-1 split
Wedbush Securities Inc13,670$1.13M0.05%00.0%UnchangedConverted for a 10-for-1 split
Profund Advisors LLC13,888$1.15M0.04%+5,518+65.9%AddedConverted for a 10-for-1 split
Avestar Capital, LLC14,175$1.17M0.23%−235−1.6%ReducedConverted for a 10-for-1 split
IVC Wealth Advisors LLC14,330$1.19M0.83%−190−1.3%ReducedConverted for a 10-for-1 split
Natixis14,420$1.19M0.01%−305,410−95.5%ReducedConverted for a 10-for-1 split
Raymond James Financial Services Advisors, Inc.14,422$1.19M0.00%+8,562+146.1%AddedConverted for a 10-for-1 split
Cresset Asset Management, LLC14,680$1.22M0.02%−4,020−21.5%ReducedConverted for a 10-for-1 split
CIBC Asset Management Inc14,720$1.22M0.00%00.0%UnchangedConverted for a 10-for-1 split
Insight Wealth Strategies, LLC14,738$1.22M0.17%−2,032−12.1%ReducedConverted for a 10-for-1 split
Pitcairn Co14,880$1.23M0.08%−170−1.1%ReducedConverted for a 10-for-1 split
Comerica Bank15,170$1.25M0.01%−10,270−40.4%ReducedConverted for a 10-for-1 split
Icon Wealth Partners, LLC15,090$1.25M0.13%+1,690+12.6%AddedConverted for a 10-for-1 split
Eaton Vance Management15,330$1.27M0.00%+2,830+22.6%AddedConverted for a 10-for-1 split
Dynamic Technology Lab Private Ltd15,481$1.28M0.13%+10,541+213.4%AddedConverted for a 10-for-1 split
Chicago Partners Investment Group LLC14,400$1.28M0.10%+1,500+11.6%AddedConverted for a 10-for-1 split
FNY Investment Advisers, LLC15,700$1.30M0.52%+15,700New
First Trust Advisors LP15,700$1.34M0.00%−51,130−76.5%ReducedConverted for a 10-for-1 split
Conestoga Capital Advisors, LLC16,245$1.34M0.02%+1,345+9.0%AddedConverted for a 10-for-1 split
Sumitomo Life Insurance Co16,540$1.37M0.04%−2,820−14.6%ReducedConverted for a 10-for-1 split
EagleClaw Capital Managment, LLC16,610$1.38M0.36%+500+3.1%AddedConverted for a 10-for-1 split
Seeyond16,870$1.40M0.13%00.0%UnchangedConverted for a 10-for-1 split
Leisure Capital Management16,906$1.40M0.78%−244−1.4%ReducedConverted for a 10-for-1 split
Commonwealth Equity Services, LLC17,183$1.42M0.00%00.0%UnchangedConverted for a 10-for-1 split
Keybank National Association17,192$1.42M0.01%+392+2.3%AddedConverted for a 10-for-1 split
Fort, L.P.17,200$1.43M0.41%−2,470−12.6%ReducedConverted for a 10-for-1 split
Greenline Partners, LLC17,270$1.43M0.29%+710+4.3%AddedConverted for a 10-for-1 split
Proequities, Inc.17,590$1.46M0.09%+1,240+7.6%AddedConverted for a 10-for-1 split
Pinebridge Investments, L.P.17,840$1.48M0.02%−15,960−47.2%ReducedConverted for a 10-for-1 split
E. Ohman J:or Asset Management AB18,000$1.49M0.05%+4,000+28.6%AddedConverted for a 10-for-1 split
Mariner, LLC18,057$1.50M0.01%+18,057New
Malaga Cove Capital, LLC18,240$1.51M0.65%+520+2.9%AddedConverted for a 10-for-1 split
Redmond Asset Management, LLC18,550$1.54M0.45%+520+2.9%AddedConverted for a 10-for-1 split
Daiwa Securities Group Inc.19,020$1.57M0.01%−7,920−29.4%ReducedConverted for a 10-for-1 split
Institute for Wealth Management, LLC.19,073$1.58M0.28%−327−1.7%ReducedConverted for a 10-for-1 split
Capitolis Advisors LLC19,570$1.62M0.02%−9,780−33.3%ReducedConverted for a 10-for-1 split
DuPont Capital Management Corp19,920$1.65M0.04%+19,920New