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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
Private Trust Co NA280$18.8K0.00%−171−37.9%Reduced
Farmers & Merchants Investments Inc280$18.8K0.00%+10+3.7%Added
True Wealth Design, LLC278$18.7K0.01%+226+434.6%Added
Garton & Associates Financial Advisors LLC274$18.4K0.01%+274New
Root Financial Partners, LLC272$18.3K0.00%−97−26.3%Reduced
Covestor Ltd262$18.0K0.01%−4−1.5%Reduced
McIlrath & Eck, LLC258$17.3K0.00%−80−23.7%Reduced
Chilton Capital Management LLC245$16.5K0.00%−184−42.9%Reduced
Cullen/Frost Bankers, Inc.236$15.9K0.00%−137−36.7%Reduced
Catalyst Capital Advisors LLC228$15.3K0.00%+16+7.5%Added
Basecamp Wealth Advisors LLC223$15.0K0.00%+223New
Birchwood Financial Partners, Inc.220$14.8K0.01%+220New
South State Corp.217$14.6K0.00%−34−13.5%Reduced
Cornerstone Planning Group LLC211$13.8K0.00%−62−22.7%Reduced
Dynamic Wealth Strategies, LLC204$13.7K0.01%+4+2.0%Added
CBIZ Investment Advisory Services, LLC185$12.4K0.00%+143+340.5%Added
Bogart Wealth, LLC176$11.8K0.00%−23−11.6%Reduced
St Germain D J Co Inc176$11.8K0.00%+176New
CGC Financial Services, LLC166$11.2K0.00%+166New
Swiss Re Ltd162$10.9K0.00%+162New
Private Wealth Asset Management, LLC161$10.8K0.00%00.0%Unchanged
Quaker Wealth Management, LLC152$10.2K0.00%+2+1.3%Added
ORG Partners LLC145$9.73K0.00%−26−15.2%Reduced
USA Financial Portformulas Corp143$9.62K0.00%−18,614−99.2%Reduced
UMA Financial Services, Inc.140$9.41K0.00%+9+6.9%Added
Rational Advisors LLC139$9.35K0.00%+7+5.3%Added
Quent Capital, LLC138$9.28K0.00%−170−55.2%Reduced
Purpose Unlimited Inc.132$8.87K0.00%+132New
Asset Dedication, LLC131$8.81K0.00%00.0%Unchanged
Aventura Private Wealth, LLC122$8.20K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC118$7.93K0.00%+15+14.6%Added
Ronald Blue Trust, Inc.115$7.73K0.00%−75−39.5%Reduced
Elyxium Wealth, LLC114$7.67K0.00%+114New
TD Waterhouse Canada Inc.114$7.66K0.00%+105+1,166.7%Added
SJS Investment Consulting Inc.112$7.53K0.00%−297−72.6%Reduced
Arlington Trust Co LLC110$7.40K0.00%+110New
Meramec Financial Planners, LLC146$7.34K0.00%+146New
Dogwood Wealth Management LLC109$7.33K0.00%+15+16.0%Added
Private Wealth Management Group, LLC101$6.79K0.00%−90−47.1%Reduced
Keating Financial Advisory Services, Inc.101$6.79K0.00%+101New
First United Bank Trust100$6.72K0.00%00.0%Unchanged
Concord Wealth Partners100$6.72K0.00%00.0%Unchanged
Orion Capital Management LLC100$6.72K0.00%00.0%Unchanged
Flagship Harbor Advisors, LLC100$6.72K0.00%+100New
Harbour Investments, Inc.99$6.66K0.00%−142−58.9%Reduced
MTM Investment Management, LLC93$6.25K0.00%00.0%Unchanged
HM Payson & Co92$6.19K0.00%+42+84.0%Added
Torren Management, LLC92$6.19K0.00%+92New
Howard Hughes Medical Institute91$6.12K0.00%00.0%Unchanged
Smithfield Trust Co90$6.00K0.00%00.0%Unchanged
Bell Investment Advisors, Inc81$5.45K0.00%−122−60.1%Reduced
Raffa Wealth Management, LLC81$5.45K0.00%−16−16.5%Reduced
Clayton Financial Group LLC77$5.18K0.00%+77New
Kemnay Advisory Services Inc.77$5.18K0.00%+77New
Heritage Wealth Advisors76$5.11K0.00%00.0%Unchanged
Trust Co of Vermont75$5.04K0.00%00.0%Unchanged
Washington Trust Advisors, Inc.72$4.87K0.00%−90−55.6%Reduced
Barnes Dennig Private Wealth Management LLC71$4.77K0.00%+22+44.9%Added
Marquette Asset Management, LLC70$4.71K0.00%+10+16.7%Added
Westfuller Advisors, LLC66$4.44K0.00%−44−40.0%Reduced
Principia Wealth Advisory, LLC64$4.30K0.00%−14−17.9%Reduced
Prosperity Bancshares Inc64$4.30K0.00%+64New
DT Investment Partners, LLC62$4.17K0.00%00.0%Unchanged
Bartlett & Co. Wealth Management LLC60$4.03K0.00%+57+1,900.0%Added
Farmers & Merchants Trust Co of Chambersburg PA64$4.00K0.00%00.0%Unchanged
IFC & Insurance Marketing, Inc.59$4.00K0.00%+59New
Prestige Wealth Management Group LLC59$3.97K0.00%−5,965−99.0%Reduced
First Horizon Corp58$3.90K0.00%+9+18.4%Added
Cornerstone Financial Management LLC53$3.56K0.00%+53New
J.Safra Asset Management Corp52$3.50K0.00%+37+246.7%Added
Bellevue Asset Management, LLC51$3.43K0.00%−2−3.8%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
Salomon & Ludwin, LLC48$3.19K0.00%−155−76.4%Reduced
Fortitude Family Office, LLC47$3.16K0.00%−14−23.0%Reduced
Activest Wealth Management47$3.16K0.00%+7+17.5%Added
North Star Investment Management Corp.43$2.89K0.00%+43New
MV Capital Management, Inc.42$2.83K0.00%−93−68.9%Reduced
Country Trust Bank41$2.76K0.00%00.0%Unchanged
Sachetta, LLC39$2.62K0.00%−19−32.8%Reduced
Accent Capital Management, LLC38$2.56K0.00%00.0%Unchanged
Manchester Capital Management LLC36$2.42K0.00%−83−69.7%Reduced
Graney & King, LLC35$2.35K0.00%00.0%Unchanged
Kilter Group LLC34$2.29K0.00%−41−54.7%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
Avion Wealth38$2.00K0.00%−34−47.2%Reduced
Rachor Investment Advisory Services, LLC29$1.95K0.00%+29New
Signature Equity Partners, LLC29$1.95K0.00%+29New
Bay Harbor Wealth Management, LLC29$1.95K0.00%+8+38.1%Added
DiNuzzo Private Wealth, Inc.28$1.88K0.00%−4−12.5%Reduced
Dunhill Financial, LLC28$1.87K0.00%−84−75.0%Reduced
Cape Investment Advisory, Inc.27$1.81K0.00%00.0%Unchanged
Highline Wealth Partners LLC26$1.75K0.00%−11−29.7%Reduced
Turning Point Benefit Group, Inc.26$1.75K0.00%+26New
Thurston, Springer, Miller, Herd & Titak, Inc.25$1.68K0.00%+25New
PayPay Securities Corp24$1.61K0.05%+7+41.2%Added
Crewe Advisors LLC24$1.61K0.00%+24New