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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, Q4 2025

Institutional positions in Costar Group, Inc. as of Dec 31, 2025. 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
847
−40 vs. Q3 2025
Shares held
422.7M
+11.7M (+2.8%) vs. Q3 2025
Total value
$28.4B
−$6.23B (−18.0%) vs. Q3 2025
New holders
103
273 more added
Sold out
143
388 more reduced

18 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2025: 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 holdersQ4 2025: 847 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 heldQ4 2025: $28.4B
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, Q4 2025

Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q3 2025.

Institutions holding CSGP in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Caitong International Asset Management Co., Ltd1$670.00%−514−99.8%Reduced
Ameriflex Group, Inc.1$670.00%−133−99.3%Reduced
Eastern Bank1$670.00%−43−97.7%Reduced
Hollencrest Capital Management1$670.00%00.0%Unchanged
Scarborough Advisors, LLC1$670.00%00.0%Unchanged
Winnow Wealth LLC1$680.00%−11−91.7%Reduced
Parallax Volatility Advisers, L.P.2$1340.00%00.0%Unchanged
Vision Financial Markets LLC3$2020.00%00.0%Unchanged
Legacy Wealth Managment, LLC3$2020.00%00.0%Unchanged
Clark Wealth Partners3$2020.00%00.0%Unchanged
Kingdom Financial Group LLC.3$2020.00%+3New
Optima Capital LLC3$2020.00%+3New
Rialto Wealth Management, LLC4$2690.00%−10−71.4%Reduced
Hughes Financial Services, LLC4$2690.00%−2−33.3%Reduced
Seneschal Advisors, LLC4$2690.00%00.0%Unchanged
DecisionPoint Financial, LLC4$2690.00%00.0%Unchanged
CDKV Holdings LLC4$2690.00%+4New
Sound Income Strategies, LLC5$3270.00%00.0%Unchanged
Sunbelt Securities, Inc.5$3360.00%−148−96.7%Reduced
CoreCap Advisors, LLC5$3360.00%−60−92.3%Reduced
Creative Financial Designs Inc5$3360.00%−10−66.7%Reduced
United Community Bank5$3360.00%−8−61.5%Reduced
Luken Investment Analytics, LLC5$3360.00%+5New
Financial Management Professionals, Inc.6$4030.00%−108−94.7%Reduced
Brown, Lisle/Cummings, Inc.6$4030.00%00.0%Unchanged
TFC Financial Management7$4710.00%−16−69.6%Reduced
Strengthening Families & Communities, LLC7$4710.00%00.0%Unchanged
1015 Capital Partners, LLC8$5380.00%+8New
AdvisorNet Financial, Inc10$6720.00%−10−50.0%Reduced
Global Trust Asset Management, LLC10$6720.00%00.0%Unchanged
Key Financial Inc10$6720.00%00.0%Unchanged
Mowery & Schoenfeld Wealth Management, LLC10$6730.00%00.0%Unchanged
American Capital Advisory, LLC13$8750.00%+6+85.7%Added
Navalign, LLC14$9410.00%+14New
CKW Financial Group20$1.00K0.00%00.0%Unchanged
Wealth Watch Advisors, INC15$1.01K0.00%+2+15.4%Added
Stephens Consulting, LLC15$1.01K0.00%+15New
Independence Bank of Kentucky16$1.08K0.00%+16New
Aspect Partners, LLC17$1.14K0.00%−9−34.6%Reduced
IMG Wealth Management, Inc.17$1.14K0.00%+17New
1620 Investment Advisors, Inc.18$1.21K0.00%00.0%Unchanged
SHP Wealth Management18$1.21K0.00%+18New
Proathlete Wealth Management LLC21$1.41K0.00%−1,645−98.7%Reduced
Wilkerson Advisory Group LLC21$1.41K0.00%+21New
ZRC Wealth Management, LLC21$1.41K0.00%−5−19.2%Reduced
Bruce G. Allen Investments, LLC22$1.48K0.00%−21−48.8%Reduced
NVWM, LLC22$1.48K0.00%+3+15.8%Added
PayPay Securities Corp24$1.61K0.05%+7+41.2%Added
Crewe Advisors LLC24$1.61K0.00%+24New
Thurston, Springer, Miller, Herd & Titak, Inc.25$1.68K0.00%+25New
Highline Wealth Partners LLC26$1.75K0.00%−11−29.7%Reduced
Turning Point Benefit Group, Inc.26$1.75K0.00%+26New
Cape Investment Advisory, Inc.27$1.81K0.00%00.0%Unchanged
Dunhill Financial, LLC28$1.87K0.00%−84−75.0%Reduced
DiNuzzo Private Wealth, Inc.28$1.88K0.00%−4−12.5%Reduced
Bay Harbor Wealth Management, LLC29$1.95K0.00%+8+38.1%Added
Rachor Investment Advisory Services, LLC29$1.95K0.00%+29New
Signature Equity Partners, LLC29$1.95K0.00%+29New
Avion Wealth38$2.00K0.00%−34−47.2%Reduced
N.E.W. Advisory Services LLC30$2.02K0.00%00.0%Unchanged
High Note Wealth, LLC30$2.02K0.00%+25+500.0%Added
Costello Asset Management, INC30$2.02K0.00%+30New
Kilter Group LLC34$2.29K0.00%−41−54.7%Reduced
Graney & King, LLC35$2.35K0.00%00.0%Unchanged
Manchester Capital Management LLC36$2.42K0.00%−83−69.7%Reduced
Accent Capital Management, LLC38$2.56K0.00%00.0%Unchanged
Sachetta, LLC39$2.62K0.00%−19−32.8%Reduced
Country Trust Bank41$2.76K0.00%00.0%Unchanged
MV Capital Management, Inc.42$2.83K0.00%−93−68.9%Reduced
North Star Investment Management Corp.43$2.89K0.00%+43New
Fortitude Family Office, LLC47$3.16K0.00%−14−23.0%Reduced
Activest Wealth Management47$3.16K0.00%+7+17.5%Added
Salomon & Ludwin, LLC48$3.19K0.00%−155−76.4%Reduced
Rakuten Securities, Inc.50$3.36K0.00%−30−37.5%Reduced
Red Tortoise LLC50$3.36K0.00%00.0%Unchanged
Valued Wealth Advisors LLC50$3.36K0.00%00.0%Unchanged
Bellevue Asset Management, LLC51$3.43K0.00%−2−3.8%Reduced
J.Safra Asset Management Corp52$3.50K0.00%+37+246.7%Added
Cornerstone Financial Management LLC53$3.56K0.00%+53New
First Horizon Corp58$3.90K0.00%+9+18.4%Added
Prestige Wealth Management Group LLC59$3.97K0.00%−5,965−99.0%Reduced
Farmers & Merchants Trust Co of Chambersburg PA64$4.00K0.00%00.0%Unchanged
IFC & Insurance Marketing, Inc.59$4.00K0.00%+59New
Bartlett & Co. Wealth Management LLC60$4.03K0.00%+57+1,900.0%Added
DT Investment Partners, LLC62$4.17K0.00%00.0%Unchanged
Principia Wealth Advisory, LLC64$4.30K0.00%−14−17.9%Reduced
Prosperity Bancshares Inc64$4.30K0.00%+64New
Westfuller Advisors, LLC66$4.44K0.00%−44−40.0%Reduced
Marquette Asset Management, LLC70$4.71K0.00%+10+16.7%Added
Barnes Dennig Private Wealth Management LLC71$4.77K0.00%+22+44.9%Added
Washington Trust Advisors, Inc.72$4.87K0.00%−90−55.6%Reduced
Trust Co of Vermont75$5.04K0.00%00.0%Unchanged
Heritage Wealth Advisors76$5.11K0.00%00.0%Unchanged
Kemnay Advisory Services Inc.77$5.18K0.00%+77New
Clayton Financial Group LLC77$5.18K0.00%+77New
Raffa Wealth Management, LLC81$5.45K0.00%−16−16.5%Reduced
Bell Investment Advisors, Inc81$5.45K0.00%−122−60.1%Reduced
Smithfield Trust Co90$6.00K0.00%00.0%Unchanged
Howard Hughes Medical Institute91$6.12K0.00%00.0%Unchanged
Torren Management, LLC92$6.19K0.00%+92New