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.
| 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, Q3 2025
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State Street Corp | 18,284,128 | $1.54B | 0.05% | +551,160+3.1% | Added |
| Principal Financial Group Inc | 18,623,370 | $1.57B | 0.79% | −23,279−0.1% | Reduced |
| Bamco Inc | 19,255,566 | $1.62B | 4.31% | −424,369−2.2% | Reduced |
| BlackRock, Inc. | 36,133,158 | $3.05B | 0.05% | +1,093,724+3.1% | Added |
| Vanguard Group Inc | 70,056,441 | $5.91B | 0.09% | +1,208,958+1.8% | Added |
| Candlestick Capital Management LP | 0 | $0 | 0.00% | −596,098−100.0% | Sold out |
| Bridgewater Associates, LP | 0 | $0 | 0.00% | −432,708−100.0% | Sold out |
| Tribune Investment Group LP | 0 | $0 | 0.00% | −180,000−100.0% | Sold out |
| CIBC World Markets Inc. | 0 | $0 | 0.00% | −151,534−100.0% | Sold out |
| Driehaus Capital Management LLC | 0 | $0 | 0.00% | −96,183−100.0% | Sold out |
| Westfield Capital Management Co LP | 0 | $0 | 0.00% | −74,545−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −39,822−100.0% | Sold out |
| Castle Hook Partners LP | 0 | $0 | 0.00% | −31,593−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −26,299−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −22,585−100.0% | Sold out |
| Moors & Cabot, Inc. | 0 | $0 | 0.00% | −20,233−100.0% | Sold out |
| Markel Group Inc.SuperinvestorMarkel Group | 0 | $0 | 0.00% | −18,600−100.0% | Sold out |
| Concentric Capital Strategies, LP | 0 | $0 | 0.00% | −16,758−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −15,285−100.0% | Sold out |
| TradeLink Capital LLC | 0 | $0 | 0.00% | −15,081−100.0% | Sold out |
| S-Bank Fund Management Ltd | 0 | $0 | 0.00% | −13,316−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −12,100−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −9,300−100.0% | Sold out |
| Hamilton Lane Advisors LLC | 0 | $0 | 0.00% | −9,232−100.0% | Sold out |
| Grantham, Mayo, Van Otterloo & Co. LLC | 0 | $0 | 0.00% | −8,373−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −8,202−100.0% | Sold out |
| Farringdon Capital, Ltd. | 0 | $0 | 0.00% | −6,957−100.0% | Sold out |
| Tectonic Advisors LLC | 0 | $0 | 0.00% | −4,662−100.0% | Sold out |
| Quantitative Investment Management, LLC | 0 | $0 | 0.00% | −4,556−100.0% | Sold out |
| V-Square Quantitative Management LLC | 0 | $0 | 0.00% | −3,831−100.0% | Sold out |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −3,829−100.0% | Sold out |
| ICONIQ Capital, LLC | 0 | $0 | 0.00% | −3,526−100.0% | Sold out |
| VestGen Advisors, LLC | 0 | $0 | 0.00% | −3,441−100.0% | Sold out |
| MBB Public Markets I LLC | 0 | $0 | 0.00% | −3,266−100.0% | Sold out |
| Family Wealth Group, LLC | 0 | $0 | 0.00% | −2,920−100.0% | Sold out |
| Tocqueville Asset Management L.P. | 0 | $0 | 0.00% | −2,883−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −2,831−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −2,661−100.0% | Sold out |
| Fullcircle Wealth LLC | 0 | $0 | 0.00% | −2,195−100.0% | Sold out |
| Aptus Capital Advisors, LLC | 0 | $0 | 0.00% | −2,553−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −2,545−100.0% | Sold out |
| City National Bank of Florida | 0 | $0 | 0.00% | −2,534−100.0% | Sold out |
| Simplicity Wealth,LLC | 0 | $0 | 0.00% | −2,534−100.0% | Sold out |
| GeoWealth Management, LLC | 0 | $0 | 0.00% | −1,203−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −765−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −472−100.0% | Sold out |
| NewSquare Capital LLC | 0 | $0 | 0.00% | −411−100.0% | Sold out |
| Opal Wealth Advisors, LLC | 0 | $0 | 0.00% | −327−100.0% | Sold out |
| Boreal Capital Management LLC | 0 | $0 | 0.00% | −170−100.0% | Sold out |
| Riggs Asset Managment Co. Inc. | 0 | $0 | 0.00% | −128−100.0% | Sold out |
| Whipplewood Advisors, LLC | 0 | $0 | 0.00% | −99−100.0% | Sold out |
| Carolina Wealth Advisors, LLC | 0 | $0 | 0.00% | −98−100.0% | Sold out |
| Garde Capital, Inc. | 0 | $0 | 0.00% | −88−100.0% | Sold out |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 0 | $0 | 0.00% | −80−100.0% | Sold out |
| Sierra Ocean, LLC | 0 | $0 | 0.00% | −26−100.0% | Sold out |
| WealthTrak Capital Management LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Evergreen Private Wealth LLC | 0 | $0 | 0.00% | −23−100.0% | Sold out |
| Park Square Financial Group, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Solstein Capital, LLC | 0 | $0 | 0.00% | −19−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Tobam | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Trifecta Capital Advisors, LLC | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Richardson Financial Services Inc. | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Fairway Wealth LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Bellwether Advisors, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Millstone Evans Group, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| Avantax Advisory Services, Inc. | – | – | – | – | Not filed |
| Copperwynd Financial, LLC | – | – | – | – | Not filed |
| Scott Marsh Financial, LLC | – | – | – | – | Not filed |
| E Fund Management Co., Ltd. | – | – | – | – | Not filed |
| Atria Wealth Solutions, Inc. | – | – | – | – | Not filed |
| Graypoint LLC | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Vega Investment Solutions | – | – | – | – | Not filed |
| Centricity Wealth Management, LLC | – | – | – | – | Not filed |
| Capital A Wealth Management, LLC | – | – | – | – | Not filed |
| Parkworth Wealth Management, Inc. | – | – | – | – | Not filed |
| Legacy Investment Solutions, LLC | – | – | – | – | Not filed |