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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, Q3 2025

Institutional positions in Costar Group, Inc. as of Sep 30, 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
905
+46 vs. Q2 2025
Shares held
413.6M
−5.67M (−1.4%) vs. Q2 2025
Total value
$34.9B
+$1.15B (+3.4%) vs. Q2 2025
New holders
107
364 more added
Sold out
61
314 more reduced

14 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 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 holdersQ3 2025: 905 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 heldQ3 2025: $34.9B
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, Q3 2025

Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q2 2025.

Institutions holding CSGP in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Ogorek Anthony Joseph2$00.00%+2New
Y.D. More Investments Ltd113$290.00%+113New
Hollencrest Capital Management1$840.00%00.0%Unchanged
Scarborough Advisors, LLC1$840.00%00.0%Unchanged
Parallax Volatility Advisers, L.P.2$1690.00%+2New
Clark Wealth Partners3$2020.00%−5−62.5%Reduced
Bartlett & Co. Wealth Management LLC3$2530.00%+1+50.0%Added
Vision Financial Markets LLC3$2540.00%00.0%Unchanged
Legacy Wealth Managment, LLC3$2540.00%00.0%Unchanged
Palisade Asset Management, LLC3$2540.00%+3New
Beaird Harris Wealth Management, LLC3$2540.00%+3New
DecisionPoint Financial, LLC4$3340.00%00.0%Unchanged
TD Capital Management LLC4$3370.00%00.0%Unchanged
Gen-Wealth Partners Inc4$3370.00%00.0%Unchanged
Toth Financial Advisory Corp4$3380.00%00.0%Unchanged
Seneschal Advisors, LLC4$3380.00%+4New
Sound Income Strategies, LLC5$3880.00%00.0%Unchanged
Hughes Financial Services, LLC6$4030.00%−14−70.0%Reduced
Hurley Capital, LLC5$4220.00%+5New
High Note Wealth, LLC5$4220.00%+5New
Brown, Lisle/Cummings, Inc.6$5060.00%00.0%Unchanged
Strengthening Families & Communities, LLC7$5900.00%00.0%Unchanged
American Capital Advisory, LLC7$5910.00%+1+16.7%Added
TD Waterhouse Canada Inc.9$7540.00%00.0%Unchanged
Key Financial Inc10$8350.00%00.0%Unchanged
Wolff Wiese Magana LLC10$8440.00%00.0%Unchanged
Mowery & Schoenfeld Wealth Management, LLC10$8440.00%00.0%Unchanged
Global Trust Asset Management, LLC10$8440.00%00.0%Unchanged
Bare Financial Services, Inc10$8440.00%+10New
Capital Advisors, Ltd. LLC11$1.00K0.00%00.0%Unchanged
Winnow Wealth LLC12$1.02K0.00%+12New
United Community Bank13$1.10K0.00%+13New
Wealth Watch Advisors, INC13$1.10K0.00%−3−18.8%Reduced
Rialto Wealth Management, LLC14$1.18K0.00%+8+133.3%Added
Creative Financial Designs Inc15$1.27K0.00%00.0%Unchanged
J.Safra Asset Management Corp15$1.27K0.00%+15New
Core Alternative Capital16$1.35K0.00%00.0%Unchanged
PayPay Securities Corp17$1.46K0.05%+5+41.7%Added
1620 Investment Advisors, Inc.18$1.52K0.00%00.0%Unchanged
Avalon Trust Co18$1.52K0.00%+18New
NVWM, LLC19$1.60K0.00%00.0%Unchanged
AdvisorNet Financial, Inc20$1.69K0.00%−60−75.0%Reduced
Texas Capital Bancshares Inc20$1.69K0.00%+20New
Salem Investment Counselors Inc20$1.69K0.00%00.0%Unchanged
Bay Harbor Wealth Management, LLC21$1.77K0.00%+7+50.0%Added
TFC Financial Management23$1.94K0.00%00.0%Unchanged
CKW Financial Group20$2.00K0.00%00.0%Unchanged
Aspect Partners, LLC26$2.19K0.00%+26New
Proffitt & Goodson Inc26$2.19K0.00%+26New
ZRC Wealth Management, LLC26$2.19K0.00%+26New
Cape Investment Advisory, Inc.27$2.28K0.00%00.0%Unchanged
N.E.W. Advisory Services LLC30$2.53K0.00%00.0%Unchanged
Grey Fox Wealth Advisors, LLC30$2.53K0.00%+30New
Binnacle Investments Inc32$2.70K0.00%00.0%Unchanged
Tortoise Investment Management, LLC32$2.70K0.00%+28+700.0%Added
DiNuzzo Private Wealth, Inc.32$2.86K0.00%00.0%Unchanged
Graney & King, LLC35$2.95K0.00%00.0%Unchanged
Highline Wealth Partners LLC37$3.12K0.00%+4+12.1%Added
Accent Capital Management, LLC38$3.21K0.00%00.0%Unchanged
Activest Wealth Management40$3.38K0.00%+8+25.0%Added
Halbert Hargrove Global Advisors, LLC40$3.38K0.00%+40New
Country Trust Bank41$3.46K0.00%00.0%Unchanged
CBIZ Investment Advisory Services, LLC42$3.54K0.00%+10+31.3%Added
Bruce G. Allen Investments, LLC43$3.63K0.00%00.0%Unchanged
Eastern Bank44$3.71K0.00%+43+4,300.0%Added
S&T Bank46$3.88K0.00%+14+43.8%Added
First Horizon Corp49$4.13K0.00%+49New
Barnes Dennig Private Wealth Management LLC49$4.13K0.00%+49New
HM Payson & Co50$4.22K0.00%00.0%Unchanged
Red Tortoise LLC50$4.22K0.00%00.0%Unchanged
Valued Wealth Advisors LLC50$4.22K0.00%00.0%Unchanged
True Wealth Design, LLC52$4.42K0.00%−2−3.7%Reduced
Bellevue Asset Management, LLC53$4.47K0.00%−2−3.6%Reduced
Sachetta, LLC58$4.89K0.00%−2−3.3%Reduced
Farmers & Merchants Trust Co of Chambersburg PA64$5.00K0.00%00.0%Unchanged
Cloud Capital Management, LLC70$5.00K0.00%+70New
Marquette Asset Management, LLC60$5.06K0.00%+60New
Fortitude Family Office, LLC61$5.15K0.00%+7+13.0%Added
DT Investment Partners, LLC62$5.23K0.00%00.0%Unchanged
CoreCap Advisors, LLC65$5.48K0.00%+22+51.2%Added
Guerra Advisors Inc69$5.82K0.00%+69New
Avion Wealth72$6.00K0.00%+2+2.9%Added
Marshall & Sterling Wealth Advisors Inc.75$6.33K0.00%−287−79.3%Reduced
Kilter Group LLC75$6.33K0.00%−40−34.8%Reduced
Trust Co of Vermont75$6.33K0.00%00.0%Unchanged
Heritage Wealth Advisors76$6.41K0.00%00.0%Unchanged
Principia Wealth Advisory, LLC78$6.58K0.00%+55+239.1%Added
TruNorth Capital Management, LLC79$6.67K0.00%+79New
Rakuten Securities, Inc.80$6.75K0.00%+19+31.1%Added
MJT & Associates Financial Advisory Group, Inc.81$6.83K0.01%−1−1.2%Reduced
Webster Bank, N. A.88$7.42K0.00%00.0%Unchanged
Howard Hughes Medical Institute91$7.68K0.00%00.0%Unchanged
MTM Investment Management, LLC93$7.85K0.00%00.0%Unchanged
Dogwood Wealth Management LLC94$7.93K0.00%+7+8.0%Added
Smithfield Trust Co90$8.00K0.00%00.0%Unchanged
Raffa Wealth Management, LLC97$8.18K0.00%+36+59.0%Added
First United Bank Trust100$8.44K0.00%00.0%Unchanged
Concord Wealth Partners100$8.44K0.00%00.0%Unchanged
Orion Capital Management LLC100$8.44K0.00%00.0%Unchanged
Edmond de Rothschild Holding S.A.102$8.61K0.00%00.0%Unchanged