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 2026
Institutional positions in Costar Group, Inc. as of Jun 30, 2026. 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
- 760
- −28 vs. Q1 2026
- Shares held
- 414.0M
- +5.90M (+1.4%) vs. Q1 2026
- Total value
- $11.7B
- −$4.74B (−28.8%) vs. Q1 2026
- New holders
- 115
- 303 more added
- Sold out
- 143
- 266 more reduced
9 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 760 | $11.7B |
| Q1 2026 | 797 | $16.8B |
| Q4 2025 | 847 | $28.4B |
| Q3 2025 | 905 | $34.9B |
| Q2 2025 | 873 | $34.2B |
| Q1 2025 | 858 | $33.9B |
| Q4 2024 | 805 | $28.9B |
| Q3 2024 | 773 | $30.0B |
| Q2 2024 | 767 | $29.3B |
| Q1 2024 | 767 | $38.4B |
| Q4 2023 | 737 | $34.4B |
| Q3 2023 | 690 | $30.1B |
| Q2 2023 | 714 | $35.5B |
| Q1 2023 | 692 | $26.7B |
| Q4 2022 | 704 | $30.4B |
| Q3 2022 | 634 | $28.0B |
| Q2 2022 | 591 | $23.0B |
| Q1 2022 | 589 | $25.2B |
| Q4 2021 | 633 | $29.6B |
| Q3 2021 | 594 | $32.3B |
| Q2 2021 | 607 | $31.1B |
| Q1 2021 | 593 | $31.2B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Quadrature Capital Ltd | 25,018 | $708.5K | 0.01% | +25,018 | New |
| Cresset Asset Management, LLC | 25,258 | $715.3K | 0.00% | +15,287+153.3% | Added |
| Guidance Capital, Inc | 23,566 | $715.7K | 0.15% | +2,552+12.1% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 25,530 | $723.0K | 0.00% | −111,197−81.3% | Reduced |
| Bridgefront Capital, LLC | 25,853 | $732.2K | 0.19% | +15,048+139.3% | Added |
| Neuberger Berman Group LLC | 25,948 | $734.8K | 0.00% | −35,154−57.5% | Reduced |
| Malaga Cove Capital, LLC | 26,083 | $738.7K | 0.24% | −3,357−11.4% | Reduced |
| Prudential PLC | 26,124 | $739.8K | 0.01% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 26,257 | $743.6K | 0.01% | +5,911+29.1% | Added |
| First Trust Advisors LP | 26,261 | $743.7K | 0.00% | −812,783−96.9% | Reduced |
| Diversify Wealth Management, LLC | 25,570 | $745.9K | 0.01% | +5,994+30.6% | Added |
| Diversify Advisory Services, LLC | 25,570 | $745.9K | 0.01% | +25,570 | New |
| Kentucky Retirement Systems | 26,362 | $746.6K | 0.02% | +26,362 | New |
| Schroder Investment Management Group | 26,418 | $748.2K | 0.00% | −5,719−17.8% | Reduced |
| Pacific Capital Partners Ltd | 26,559 | $752.2K | 0.65% | +9,259+53.5% | Added |
| Harbor Advisors LLC | 26,560 | $752.2K | 0.09% | 00.0% | Unchanged |
| Investment Management Corp of Ontario | 26,769 | $758.1K | 0.01% | −3,600−11.9% | Reduced |
| Pallas Capital Advisors LLC | 26,889 | $761.5K | 0.02% | +19,452+261.6% | Added |
| Chicago Partners Investment Group LLC | 28,290 | $767.8K | 0.02% | +10,336+57.6% | Added |
| Janney Montgomery Scott LLC | 27,730 | $785.0K | 0.00% | +1,245+4.7% | Added |
| Eurizon Capital SGR S.p.A. | 28,014 | $795.0K | 0.00% | −14,023−33.4% | Reduced |
| Alps Advisors Inc | 28,261 | $800.4K | 0.00% | +4,615+19.5% | Added |
| Mattern Capital Management, LLC | 28,450 | $805.7K | 0.09% | +8,705+44.1% | Added |
| B. Metzler seel. Sohn & Co. AG | 28,620 | $810.5K | 0.01% | −2,037−6.6% | Reduced |
| D.A. Davidson & Co. | 28,891 | $818.2K | 0.00% | −2,337−7.5% | Reduced |
| Personal Cfo Solutions, LLC | 29,084 | $823.7K | 0.12% | −5,501−15.9% | Reduced |
| Saudi Central Bank | 29,386 | $832.2K | 0.01% | +13,742+87.8% | Added |
| Papp L Roy & Associates | 29,990 | $849.3K | 0.09% | −2,899−8.8% | Reduced |
| Chilton Investment Co LLC | 30,320 | $858.7K | 0.02% | +30,320 | New |
| Portside Wealth Group, LLC | 30,382 | $860.4K | 0.10% | −7,146−19.0% | Reduced |
| Tower Research Capital LLC (TRC) | 30,993 | $877.7K | 0.02% | −39,023−55.7% | Reduced |
| Kornitzer Capital Management Inc | 31,101 | $880.8K | 0.02% | −176,665−85.0% | Reduced |
| Bleakley Financial Group, LLC | 31,524 | $892.8K | 0.01% | +31,524 | New |
| Mizuho Securities USA LLC | 31,970 | $905.4K | 0.01% | +6,348+24.8% | Added |
| Ethic Inc. | 31,997 | $906.2K | 0.01% | +5,363+20.1% | Added |
| Knollwood Investment Advisory, LLC | 32,150 | $910.5K | 0.08% | −9,713−23.2% | Reduced |
| Gulf International Bank (UK) Ltd | 32,261 | $913.0K | 0.02% | −590−1.8% | Reduced |
| EagleClaw Capital Managment, LLC | 32,250 | $913.3K | 0.12% | −1,500−4.4% | Reduced |
| QRG Capital Management, Inc. | 32,305 | $914.9K | 0.01% | +1,366+4.4% | Added |
| Truist Financial Corp | 32,555 | $921.9K | 0.00% | −18,563−36.3% | Reduced |
| Pacer Advisors, Inc. | 32,881 | $931.0K | 0.00% | −14,211−30.2% | Reduced |
| Summit Trail Advisors, LLC | 33,067 | $936.5K | 0.01% | +9,282+39.0% | Added |
| Barbara Oil Co. | 32,000 | $947.5K | 0.32% | 00.0% | Unchanged |
| AE Wealth Management LLC | 33,896 | $959.9K | 0.00% | +14,065+70.9% | Added |
| Formula Growth Ltd | 34,000 | $962.9K | 0.34% | 00.0% | Unchanged |
| Vident Advisory, LLC | 34,898 | $988.3K | 0.01% | +19,870+132.2% | Added |
| Liontrust Investment Partners LLP | 35,058 | $992.8K | 0.01% | 00.0% | Unchanged |
| Brighton Jones LLC | 35,127 | $994.8K | 0.02% | +23,632+205.6% | Added |
| Sanctuary Advisors, LLC | 36,059 | $1.02M | 0.00% | −1,241−3.3% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 36,155 | $1.02M | 0.00% | −676−1.8% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 36,355 | $1.03M | 0.01% | +32,903+953.2% | Added |
| Regions Financial Corp | 36,601 | $1.04M | 0.01% | −4,915−11.8% | Reduced |
| Scotia Capital Inc. | 36,646 | $1.04M | 0.00% | +1,581+4.5% | Added |
| Capital International Inc | 37,047 | $1.05M | 0.01% | +17,724+91.7% | Added |
| Nomura Holdings Inc | 37,436 | $1.06M | 0.00% | +31,714+554.2% | Added |
| Walleye Trading LLC | 37,613 | $1.07M | 0.01% | −34,896−48.1% | Reduced |
| UniSuper Management Pty Ltd | 38,884 | $1.10M | 0.01% | −14,783−27.5% | Reduced |
| Assetmark, Inc | 38,892 | $1.10M | 0.00% | +25,532+191.1% | Added |
| Advisor Group Holdings, Inc. | 38,973 | $1.10M | 0.00% | +8,470+27.8% | Added |
| Merit Financial Group, LLC | 39,432 | $1.12M | 0.01% | +26,531+205.7% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 39,466 | $1.12M | 0.01% | −98,500−71.4% | Reduced |
| Platinum Investment Management Ltd | 40,000 | $1.13M | 0.28% | −37,500−48.4% | Reduced |
| Potomac Capital Management, Inc. | 40,000 | $1.13M | 0.83% | +28,000+233.3% | Added |
| State of Alaska, Department of Revenue | 40,012 | $1.13M | 0.01% | −1,874−4.5% | Reduced |
| Dark Forest Capital Management LP | 40,369 | $1.14M | 0.07% | +40,369 | New |
| Public Employees Retirement Association of Colorado | 40,563 | $1.15M | 0.00% | −141,100−77.7% | Reduced |
| Picton Mahoney Asset Management | 40,904 | $1.16M | 0.01% | +40,904 | New |
| Mutual of America Capital Management LLC | 42,054 | $1.19M | 0.01% | −3,024−6.7% | Reduced |
| Yousif Capital Management, LLC | 42,090 | $1.19M | 0.01% | −592−1.4% | Reduced |
| National Pension Service | 42,241 | $1.20M | 0.00% | −660,437−94.0% | Reduced |
| Machina Capital S.A.S. | 42,412 | $1.20M | 0.19% | +42,412 | New |
| JustInvest LLC | 43,870 | $1.24M | 0.01% | +14,141+47.6% | Added |
| Virtu Financial LLC | 44,013 | $1.25M | 0.04% | +44,013 | New |
| Macquarie Group Ltd | 44,296 | $1.25M | 0.01% | +5,300+13.6% | Added |
| Hahn Capital Management LLC | 44,884 | $1.27M | 0.77% | −1,563−3.4% | Reduced |
| US Bancorp | 45,979 | $1.30M | 0.00% | −13,314−22.5% | Reduced |
| Nordea Investment Management AB | 46,572 | $1.32M | 0.00% | −40,658−46.6% | Reduced |
| SRS Capital Advisors, Inc. | 47,374 | $1.34M | 0.01% | +36,944+354.2% | Added |
| OP Asset Management Ltd | 48,694 | $1.38M | 0.01% | +5,310+12.2% | Added |
| Axq Capital, LP | 49,543 | $1.40M | 0.15% | +19,078+62.6% | Added |
| Wellington Management Group LLP | 50,070 | $1.42M | 0.00% | +1,157+2.4% | Added |
| Oregon Public Employees Retirement Fund | 50,224 | $1.42M | 0.02% | +1,700+3.5% | Added |
| Rafferty Asset Management, LLC | 50,821 | $1.44M | 0.00% | −256,325−83.5% | Reduced |
| Rothschild Investment LLC | 50,882 | $1.44M | 0.05% | +49,580+3,808.0% | Added |
| SG Americas Securities, LLC | 51,113 | $1.45M | 0.00% | −221,234−81.2% | Reduced |
| Occudo Quantitative Strategies LP | 51,329 | $1.45M | 0.08% | +51,329 | New |
| Itau Unibanco Holding S.A. | 51,607 | $1.46M | 0.03% | −932−1.8% | Reduced |
| Gsa Capital Partners LLP | 51,986 | $1.47M | 0.09% | +25,036+92.9% | Added |
| Skylands Capital, LLC | 52,150 | $1.48M | 0.18% | +20,100+62.7% | Added |
| Everence Capital Management Inc | 54,382 | $1.54M | 0.08% | +35,648+190.3% | Added |
| Sequoia Financial Advisors, LLC | 54,883 | $1.55M | 0.01% | +3,195+6.2% | Added |
| Allianz SE | 56,052 | $1.59M | 0.02% | 00.0% | Unchanged |
| New York Life Investment Management LLC | 56,711 | $1.61M | 0.01% | −1,975−3.4% | Reduced |
| Nissay Asset Management Corp | 56,761 | $1.61M | 0.01% | −61,176−51.9% | Reduced |
| Swiss Life Asset Management Ltd | 57,625 | $1.63M | 0.01% | +8,906+18.3% | Added |
| Robeco Institutional Asset Management B.V. | 57,913 | $1.64M | 0.00% | +11,895+25.8% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 60,063 | $1.70M | 0.01% | +2,580+4.5% | Added |
| Atria Investments LLC | 61,179 | $1.73M | 0.02% | −20,642−25.2% | Reduced |
| Utah Retirement Systems | 61,351 | $1.74M | 0.02% | −6,437−9.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 61,928 | $1.75M | 0.01% | −2,204−3.4% | Reduced |