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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 2025

Institutional positions in Costar Group, Inc. as of Jun 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
873
+26 vs. Q1 2025
Shares held
424.8M
−3.49M (−0.8%) vs. Q1 2025
Total value
$34.2B
+$258.5M (+0.8%) vs. Q1 2025
New holders
101
355 more added
Sold out
75
315 more reduced

11 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 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 holdersQ2 2025: 873 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 2025: $34.2B
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 2025

Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2025.

Institutions holding CSGP in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Bellwether Advisors, LLC1$800.00%−52−98.1%Reduced
Eastern Bank1$800.00%−30−96.8%Reduced
Hollencrest Capital Management1$800.00%00.0%Unchanged
Millstone Evans Group, LLC1$800.00%00.0%Unchanged
Scarborough Advisors, LLC1$800.00%+1New
Caitong International Asset Management Co., Ltd2$1610.00%00.0%Unchanged
Bartlett & Co. Wealth Management LLC2$1610.00%00.0%Unchanged
Vision Financial Markets LLC3$2420.00%00.0%Unchanged
Legacy Wealth Managment, LLC3$2420.00%00.0%Unchanged
Legacy Investment Solutions, LLC3$2420.00%+3New
Toth Financial Advisory Corp4$3220.00%00.0%Unchanged
TD Capital Management LLC4$3220.00%00.0%Unchanged
Gen-Wealth Partners Inc4$3220.00%00.0%Unchanged
Tortoise Investment Management, LLC4$3220.00%+4New
DecisionPoint Financial, LLC4$3280.00%+4New
Fairway Wealth LLC5$4020.00%00.0%Unchanged
Sound Income Strategies, LLC5$4020.00%+5New
Brown, Lisle/Cummings, Inc.6$4820.00%00.0%Unchanged
American Capital Advisory, LLC6$4830.00%00.0%Unchanged
Rialto Wealth Management, LLC6$4830.00%+6New
Strengthening Families & Communities, LLC7$5630.00%00.0%Unchanged
Clark Wealth Partners8$6430.00%−13−61.9%Reduced
Parkworth Wealth Management, Inc.8$6430.00%+3+60.0%Added
TD Waterhouse Canada Inc.9$7360.00%00.0%Unchanged
Global Trust Asset Management, LLC10$7730.00%00.0%Unchanged
Wolff Wiese Magana LLC10$8040.00%00.0%Unchanged
Mowery & Schoenfeld Wealth Management, LLC10$8040.00%00.0%Unchanged
Key Financial Inc10$8040.00%00.0%Unchanged
Richardson Financial Services Inc.11$8840.00%00.0%Unchanged
PayPay Securities Corp12$9650.05%+4+50.0%Added
Trifecta Capital Advisors, LLC12$9650.00%+12New
Capital Advisors, Ltd. LLC11$1.00K0.00%−169−93.9%Reduced
Tobam13$1.00K0.00%00.0%Unchanged
SJS Investment Consulting Inc.13$1.05K0.00%−12−48.0%Reduced
Bay Harbor Wealth Management, LLC14$1.13K0.00%+6+75.0%Added
UMA Financial Services, Inc.14$1.13K0.00%+5+55.6%Added
Creative Financial Designs Inc15$1.21K0.00%+10+200.0%Added
Stephens Consulting, LLC15$1.21K0.00%+15New
Core Alternative Capital16$1.29K0.00%00.0%Unchanged
1620 Investment Advisors, Inc.18$1.45K0.00%−59−76.6%Reduced
NVWM, LLC19$1.53K0.00%−5−20.8%Reduced
Solstein Capital, LLC19$1.53K0.00%+19New
Salem Investment Counselors Inc20$1.61K0.00%−18−47.4%Reduced
Park Square Financial Group, LLC20$1.61K0.00%00.0%Unchanged
Principia Wealth Advisory, LLC23$1.85K0.00%+5+27.8%Added
Evergreen Private Wealth LLC23$1.85K0.00%+23New
TFC Financial Management23$1.85K0.00%+2+9.5%Added
Hughes Financial Services, LLC20$1.93K0.00%−26−56.5%Reduced
CKW Financial Group20$2.00K0.00%00.0%Unchanged
WealthTrak Capital Management LLC25$2.01K0.00%−20−44.4%Reduced
Sierra Ocean, LLC26$2.09K0.00%−11−29.7%Reduced
Cape Investment Advisory, Inc.27$2.17K0.00%−2−6.9%Reduced
N.E.W. Advisory Services LLC30$2.41K0.00%00.0%Unchanged
Essential Partners LLC31$2.49K0.00%+31New
Activest Wealth Management32$2.57K0.00%−5−13.5%Reduced
Binnacle Investments Inc32$2.57K0.00%00.0%Unchanged
DiNuzzo Private Wealth, Inc.32$2.57K0.00%+1+3.2%Added
S&T Bank32$2.57K0.00%+15+88.2%Added
CBIZ Investment Advisory Services, LLC32$2.57K0.00%+26+433.3%Added
Highline Wealth Partners LLC33$2.65K0.00%−89−73.0%Reduced
Graney & King, LLC35$2.81K0.00%00.0%Unchanged
Accent Capital Management, LLC38$3.06K0.00%00.0%Unchanged
Country Trust Bank41$3.30K0.00%+41New
CoreCap Advisors, LLC43$3.46K0.00%−30−41.1%Reduced
Bruce G. Allen Investments, LLC43$3.46K0.00%+22+104.8%Added
Salomon & Ludwin, LLC48$3.91K0.00%+48New
Red Tortoise LLC50$4.02K0.00%00.0%Unchanged
Valued Wealth Advisors LLC50$4.02K0.00%00.0%Unchanged
HM Payson & Co50$4.02K0.00%+50New
Fortitude Family Office, LLC54$4.34K0.00%+43+390.9%Added
True Wealth Design, LLC54$4.38K0.00%+17+45.9%Added
Bellevue Asset Management, LLC55$4.42K0.00%−1−1.8%Reduced
Sachetta, LLC60$4.82K0.00%+2+3.4%Added
Raffa Wealth Management, LLC61$4.90K0.00%00.0%Unchanged
Rakuten Securities, Inc.61$4.90K0.00%+11+22.0%Added
DT Investment Partners, LLC62$4.99K0.00%00.0%Unchanged
Farmers & Merchants Trust Co of Chambersburg PA64$5.00K0.00%00.0%Unchanged
Avion Wealth70$5.00K0.00%+56+400.0%Added
Capital A Wealth Management, LLC63$5.51K0.06%−3,952−98.4%Reduced
Trust Co of Vermont75$6.03K0.00%00.0%Unchanged
Heritage Wealth Advisors76$6.11K0.00%00.0%Unchanged
AdvisorNet Financial, Inc80$6.43K0.00%−8−9.1%Reduced
Loring Wolcott & Coolidge Fiduciary Advisors LLP80$6.43K0.00%00.0%Unchanged
Financial Management Professionals, Inc.80$6.43K0.00%+6+8.1%Added
MJT & Associates Financial Advisory Group, Inc.82$6.59K0.01%00.0%Unchanged
Manchester Capital Management LLC82$6.59K0.00%+5+6.5%Added
Webster Bank, N. A.88$7.08K0.00%+88New
Garde Capital, Inc.88$7.08K0.00%−100−53.2%Reduced
Dogwood Wealth Management LLC87$7.21K0.00%+66+314.3%Added
Howard Hughes Medical Institute91$7.32K0.00%+91New
MTM Investment Management, LLC93$7.48K0.00%+93New
Carolina Wealth Advisors, LLC98$7.88K0.00%00.0%Unchanged
Whipplewood Advisors, LLC99$7.96K0.00%+26+35.6%Added
Smithfield Trust Co90$8.00K0.00%00.0%Unchanged
First United Bank Trust100$8.04K0.00%00.0%Unchanged
Concord Wealth Partners100$8.04K0.00%00.0%Unchanged
Orion Capital Management LLC100$8.04K0.00%00.0%Unchanged
Edmond de Rothschild Holding S.A.102$8.20K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC103$8.28K0.00%−12−10.4%Reduced
Rational Advisors LLC108$8.68K0.00%+108New