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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
Achmea Investment Management B.V.20,360$1.69M0.06%00.0%UnchangedConverted for a 10-for-1 split
Chartwell Investment Partners, LLC20,430$1.69M0.05%00.0%UnchangedConverted for a 10-for-1 split
Emerald Advisers, LLC20,480$1.70M0.06%00.0%UnchangedConverted for a 10-for-1 split
Nordea Investment Management AB20,560$1.70M0.00%−153,390−88.2%ReducedConverted for a 10-for-1 split
Voya Financial Advisors, Inc.20,782$1.73M0.23%−52,468−71.6%ReducedConverted for a 10-for-1 split
Brinker Capital Investments, LLC21,140$1.75M0.02%+3,750+21.6%AddedConverted for a 10-for-1 split
Redwood Investments, LLC21,350$1.77M0.14%−25,280−54.2%ReducedConverted for a 10-for-1 split
Atria Investments LLC22,020$1.82M0.04%+6,640+43.2%AddedConverted for a 10-for-1 split
Schroder Investment Management Group22,710$1.88M0.00%+1,950+9.4%AddedConverted for a 10-for-1 split
Candriam Luxembourg S.C.A.22,710$1.88M0.01%+3,520+18.3%AddedConverted for a 10-for-1 split
Metropolitan Life Insurance Co22,880$1.89M0.03%−5,480−19.3%ReducedConverted for a 10-for-1 split
Brookfield Asset Management Inc.23,160$1.92M0.01%+23,160New
Corient Capital Partners, LLC23,594$1.96M0.14%+4,544+23.9%AddedConverted for a 10-for-1 split
Fortis Capital Management LLC24,000$1.99M1.03%00.0%UnchangedConverted for a 10-for-1 split
M&T Bank Corp24,420$2.02M0.01%−10,410−29.9%ReducedConverted for a 10-for-1 split
Pearl River Capital, LLC24,409$2.02M0.56%+18,949+347.1%AddedConverted for a 10-for-1 split
Blueshift Asset Management, LLC24,552$2.03M0.11%+21,592+729.5%AddedConverted for a 10-for-1 split
Bell Bank25,010$2.07M0.27%+190+0.8%AddedConverted for a 10-for-1 split
Townsend & Associates, Inc24,137$2.08M1.21%+707+3.0%AddedConverted for a 10-for-1 split
Old Mission Capital LLC25,655$2.13M0.08%+25,655New
TD Private Client Wealth LLC26,358$2.18M0.09%−182−0.7%ReducedConverted for a 10-for-1 split
Park Avenue Securities LLC26,518$2.20M0.05%+3,358+14.5%AddedConverted for a 10-for-1 split
Verition Fund Management LLC26,653$2.21M0.03%+7,873+41.9%AddedConverted for a 10-for-1 split
TBH Global Asset Management, LLC27,330$2.27M0.52%+730+2.7%AddedConverted for a 10-for-1 split
Intrinsic Edge Capital Management LLC27,480$2.28M0.14%00.0%UnchangedConverted for a 10-for-1 split
Elo Mutual Pension Insurance Co27,690$2.29M0.08%+27,690New
Cetera Investment Advisers28,072$2.33M0.04%+21,402+320.9%AddedConverted for a 10-for-1 split
Fifth Third Bancorp28,088$2.33M0.01%−1,912−6.4%ReducedConverted for a 10-for-1 split
Mackenzie Financial Corp28,266$2.34M0.00%+3,106+12.3%AddedConverted for a 10-for-1 split
Caisse de Depot Et Placement du Quebec28,480$2.36M0.01%+23,700+495.8%AddedConverted for a 10-for-1 split
Tributary Capital Management, LLC28,500$2.36M0.18%−1,000−3.4%ReducedConverted for a 10-for-1 split
Vestmark Advisory Solutions, Inc.28,629$2.37M0.17%−1,091−3.7%ReducedConverted for a 10-for-1 split
Aurora Investment Managers, LLC.28,650$2.37M2.37%+28,650New
Westpac Banking Corp28,770$2.38M0.02%00.0%UnchangedConverted for a 10-for-1 split
FDx Advisors, Inc.28,801$2.38M0.08%+6,431+28.7%AddedConverted for a 10-for-1 split
HawsGoodwin Investment Management LLC28,960$2.40M0.74%−1,160−3.9%ReducedConverted for a 10-for-1 split
Jackson Wealth Management, LLC29,090$2.41M0.30%+4,760+19.6%AddedConverted for a 10-for-1 split
Virtu Financial LLC29,364$2.43M0.24%+3,504+13.5%AddedConverted for a 10-for-1 split
Tower Research Capital LLC (TRC)30,184$2.50M0.07%−6,006−16.6%ReducedConverted for a 10-for-1 split
Amalgamated Bank30,720$2.54M0.02%+11,530+60.1%AddedConverted for a 10-for-1 split
Maryland State Retirement & Pension System30,453$2.54M0.08%+633+2.1%AddedConverted for a 10-for-1 split
Carderock Capital Management Inc30,870$2.56M0.70%+480+1.6%AddedConverted for a 10-for-1 split
Clearbridge Investments, LLC31,920$2.64M0.00%00.0%UnchangedConverted for a 10-for-1 split
Barbara Oil Co.32,000$2.65M1.22%00.0%UnchangedConverted for a 10-for-1 split
Federation des caisses Desjardins du Quebec32,310$2.67M0.03%−810−2.4%ReducedConverted for a 10-for-1 split
Nicholas Investment Partners, LP32,560$2.70M0.17%−4,450−12.0%ReducedConverted for a 10-for-1 split
BTC Capital Management, Inc.34,165$2.78M0.32%−14,685−30.1%ReducedConverted for a 10-for-1 split
Quantbot Technologies LP33,645$2.79M0.22%+18,295+119.2%AddedConverted for a 10-for-1 split
Standard Life Aberdeen plc33,793$2.80M0.01%−6,797−16.7%ReducedConverted for a 10-for-1 split
EFG Asset Management (Americas) Corp.33,975$2.81M0.52%−7,235−17.6%ReducedConverted for a 10-for-1 split
Next Century Growth Investors LLC34,410$2.85M0.22%−1,170−3.3%ReducedConverted for a 10-for-1 split
AXA S.A.34,640$2.87M0.01%−3,560−9.3%ReducedConverted for a 10-for-1 split
Point72 Hong Kong Ltd34,654$2.87M0.20%−5,216−13.1%ReducedConverted for a 10-for-1 split
Stephens Inc35,488$2.94M0.04%+2,278+6.9%AddedConverted for a 10-for-1 split
HighTower Advisors, LLC36,030$2.98M0.01%+1,740+5.1%AddedConverted for a 10-for-1 split
Banco Santander, S.A.36,450$3.02M0.02%+2,500+7.4%AddedConverted for a 10-for-1 split
DekaBank Deutsche Girozentrale37,026$3.03M0.01%−5,574−13.1%ReducedConverted for a 10-for-1 split
Xponance, Inc.36,921$3.06M0.06%−3,679−9.1%ReducedConverted for a 10-for-1 split
Papp L Roy & Associates38,330$3.17M0.40%00.0%UnchangedConverted for a 10-for-1 split
Lee Capital Holdings LLC38,550$3.19M1.61%−1,000−2.5%ReducedConverted for a 10-for-1 split
Handelsbanken Fonder AB39,870$3.30M0.02%−55,730−58.3%ReducedConverted for a 10-for-1 split
Taikang Asset Management (Hong Kong) Co Ltd41,010$3.40M0.52%00.0%UnchangedConverted for a 10-for-1 split
Marks Group Wealth Management, Inc41,542$3.43M0.47%+2,792+7.2%AddedConverted for a 10-for-1 split
Zweig-DiMenna Associates LLC41,668$3.45M0.21%+41,668New
Ergoteles LLC42,420$3.51M0.08%+42,420New
Worldquant Millennium Advisors LLC42,650$3.53M0.08%00.0%UnchangedConverted for a 10-for-1 split
Allianz Asset Management GmbH42,640$3.53M0.00%+4,070+10.6%AddedConverted for a 10-for-1 split
Skye Global Management LP43,000$3.56M0.06%+43,000New
B. Metzler seel. Sohn & Co. Holding AG43,730$3.62M0.05%+26,220+149.7%AddedConverted for a 10-for-1 split
Regions Financial Corp43,920$3.64M0.03%+710+1.6%AddedConverted for a 10-for-1 split
Azzad Asset Management Inc45,388$3.76M0.56%+238+0.5%AddedConverted for a 10-for-1 split
Cambridge Investment Research Advisors, Inc.45,785$3.79M0.02%+5,105+12.5%AddedConverted for a 10-for-1 split
MML Investors Services, LLC48,472$4.01M0.03%+4,732+10.8%AddedConverted for a 10-for-1 split
Cna Financial Corp50,000$4.14M1.17%+50,000New
IFM Investors Pty Ltd50,680$4.20M0.09%+8,350+19.7%AddedConverted for a 10-for-1 split
Hexavest Inc.51,930$4.30M0.21%−49,030−48.6%ReducedConverted for a 10-for-1 split
Janney Montgomery Scott LLC52,483$4.35M0.02%+4,083+8.4%AddedConverted for a 10-for-1 split
Nisa Investment Advisors, LLC52,850$4.38M0.03%−4,500−7.8%ReducedConverted for a 10-for-1 split
Wolverine Trading, LLC52,903$4.41M0.12%+15,333+40.8%AddedConverted for a 10-for-1 split
Reliant Investment Management, LLC53,430$4.42M2.03%−670−1.2%ReducedConverted for a 10-for-1 split
Public Employees Retirement Association of Colorado53,910$4.46M0.02%00.0%UnchangedConverted for a 10-for-1 split
Formula Growth Ltd55,000$4.55M0.63%00.0%UnchangedConverted for a 10-for-1 split
Banque Pictet & Cie SA55,200$4.57M0.05%−4,800−8.0%ReducedConverted for a 10-for-1 split
Quest Investment Management LLC56,925$4.71M0.43%+56,925New
AlphaCrest Capital Management LLC57,053$4.72M0.20%+14,873+35.3%AddedConverted for a 10-for-1 split
ProShare Advisors LLC58,860$4.88M0.01%+3,930+7.2%AddedConverted for a 10-for-1 split
ETF Managers Group, LLC59,090$4.92M0.08%+51,280+656.6%AddedConverted for a 10-for-1 split
Commerce Bank59,740$4.95M0.04%−1,080−1.8%ReducedConverted for a 10-for-1 split
LPL Financial LLC60,739$5.03M0.01%+9,689+19.0%AddedConverted for a 10-for-1 split
Foster Victor Wealth Advisors, LLC61,377$5.08M0.85%+4,947+8.8%AddedConverted for a 10-for-1 split
Claar Advisors LLC61,750$5.11M1.53%+61,750New
Shaker Investments LLC62,630$5.19M2.40%00.0%UnchangedConverted for a 10-for-1 split
Connor, Clark & Lunn Investment Management Ltd.63,465$5.26M0.03%−63,095−49.9%ReducedConverted for a 10-for-1 split
Two Sigma Investments, LP64,300$5.33M0.01%−88,790−58.0%ReducedConverted for a 10-for-1 split
Jag Capital Management, LLC66,950$5.54M0.43%+4,240+6.8%AddedConverted for a 10-for-1 split
Varma Mutual Pension Insurance Co70,000$5.80M0.09%−40,000−36.4%ReducedConverted for a 10-for-1 split
Skandinaviska Enskilda Banken AB (publ)70,440$5.83M0.04%+1,380+2.0%AddedConverted for a 10-for-1 split
Zurcher Kantonalbank (Zurich Cantonalbank)70,780$5.86M0.03%00.0%UnchangedConverted for a 10-for-1 split
British Columbia Investment Management Corp72,910$6.04M0.04%+8,340+12.9%AddedConverted for a 10-for-1 split
Utah Retirement Systems74,580$6.18M0.08%−430−0.6%ReducedConverted for a 10-for-1 split