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, Q1 2026
Institutional positions in Costar Group, Inc. as of Mar 31, 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
- 797
- −34 vs. Q4 2025
- Shares held
- 415.9M
- +73.3M (+21.4%) vs. Q4 2025
- Total value
- $16.8B
- −$6.24B (−27.1%) vs. Q4 2025
- New holders
- 130
- 308 more added
- Sold out
- 164
- 276 more reduced
16 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| MV Capital Management, Inc. | 114 | $4.60K | 0.00% | +72+171.4% | Added |
| Richardson Capital Management LLC | 119 | $4.80K | 0.00% | +119 | New |
| Bayban | 120 | $4.84K | 0.00% | +120 | New |
| Asset Dedication, LLC | 131 | $5.29K | 0.00% | 00.0% | Unchanged |
| Elequin Capital LP | 137 | $5.53K | 0.00% | +137 | New |
| Rational Advisors LLC | 139 | $5.61K | 0.00% | 00.0% | Unchanged |
| USA Financial Portformulas Corp | 143 | $5.77K | 0.00% | 00.0% | Unchanged |
| Meramec Financial Planners, LLC | 146 | $5.85K | 0.00% | 00.0% | Unchanged |
| Quaker Wealth Management, LLC | 149 | $6.01K | 0.00% | −3−2.0% | Reduced |
| Private Wealth Asset Management, LLC | 159 | $6.41K | 0.00% | −2−1.2% | Reduced |
| CVA Family Office, LLC | 161 | $6.50K | 0.00% | −289−64.2% | Reduced |
| Swiss Re Ltd | 162 | $6.54K | 0.04% | 00.0% | Unchanged |
| ZRC Wealth Management, LLC | 164 | $6.62K | 0.00% | +143+681.0% | Added |
| Kemnay Advisory Services Inc. | 167 | $6.74K | 0.00% | +90+116.9% | Added |
| Covestor Ltd | 167 | $7.00K | 0.00% | −95−36.3% | Reduced |
| Atlantic Trust, LLC | 174 | $7.02K | 0.00% | +174 | New |
| St Germain D J Co Inc | 176 | $7.10K | 0.00% | 00.0% | Unchanged |
| Wall Street Financial Group, Inc. | 179 | $7.22K | 0.00% | +179 | New |
| Golden State Equity Partners | 184 | $7.42K | 0.00% | +184 | New |
| Westfuller Advisors, LLC | 186 | $7.50K | 0.00% | +120+181.8% | Added |
| First Command Advisory Services, Inc. | 187 | $7.54K | 0.00% | +187 | New |
| Stance Capital LLC | 198 | $7.98K | 0.00% | +198 | New |
| Capital Advisors, Ltd. LLC | 209 | $8.00K | 0.00% | +209 | New |
| Birchwood Financial Partners, Inc. | 217 | $8.75K | 0.01% | −3−1.4% | Reduced |
| Cornerstone Planning Group LLC | 251 | $8.76K | 0.00% | +40+19.0% | Added |
| WPG Advisers, LLC | 221 | $8.91K | 0.01% | −159−41.8% | Reduced |
| JNBA Financial Advisors | 222 | $8.96K | 0.00% | +222 | New |
| Root Financial Partners, LLC | 231 | $9.32K | 0.00% | −41−15.1% | Reduced |
| South State Corp. | 234 | $9.44K | 0.00% | +17+7.8% | Added |
| Ancora Advisors, LLC | 244 | $9.84K | 0.00% | −175−41.8% | Reduced |
| Chilton Capital Management LLC | 245 | $9.88K | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 248 | $10.0K | 0.00% | +133+115.7% | Added |
| Basecamp Wealth Advisors LLC | 257 | $10.4K | 0.00% | +34+15.2% | Added |
| McIlrath & Eck, LLC | 258 | $10.4K | 0.00% | 00.0% | Unchanged |
| Johnson Financial Group, Inc. | 264 | $10.7K | 0.00% | −456−63.3% | Reduced |
| Catalyst Capital Advisors LLC | 279 | $11.3K | 0.00% | +51+22.4% | Added |
| SBI Securities Co., Ltd. | 290 | $11.7K | 0.00% | −2−0.7% | Reduced |
| Avalon Trust Co | 297 | $12.0K | 0.00% | +297 | New |
| Raiffeisen Bank International AG | 295 | $12.1K | 0.00% | −7,255−96.1% | Reduced |
| Montag A & Associates Inc | 300 | $12.1K | 0.00% | 00.0% | Unchanged |
| Bokf, NA | 302 | $12.2K | 0.00% | −3,133−91.2% | Reduced |
| Prosperity Bancshares Inc | 309 | $12.5K | 0.01% | +245+382.8% | Added |
| Pinnacle Wealth Planning Services, Inc. | 310 | $12.5K | 0.00% | −828−72.8% | Reduced |
| Osterweis Capital Management Inc | 326 | $13.2K | 0.00% | +326 | New |
| Golden State Wealth Management, LLC | 335 | $13.5K | 0.00% | −3,838−92.0% | Reduced |
| Owl Creek Wealth Partners LLC | 345 | $13.9K | 0.00% | +345 | New |
| Westside Investment Management, Inc. | 360 | $14.4K | 0.00% | 00.0% | Unchanged |
| Hilltop National Bank | 380 | $15.3K | 0.00% | +380 | New |
| Salomon & Ludwin, LLC | 419 | $16.7K | 0.00% | +371+772.9% | Added |
| Farmers & Merchants Investments Inc | 426 | $17.2K | 0.00% | +146+52.1% | Added |
| Private Trust Co NA | 451 | $18.2K | 0.00% | +171+61.1% | Added |
| Harbour Investments, Inc. | 457 | $18.4K | 0.00% | +358+361.6% | Added |
| TD Waterhouse Canada Inc. | 495 | $19.6K | 0.00% | +381+334.2% | Added |
| Annis Gardner Whiting Capital Advisors, LLC | 487 | $19.6K | 0.00% | −21−4.1% | Reduced |
| Rossby Financial, LCC | 503 | $19.9K | 0.00% | +45+9.8% | Added |
| WealthCollab, LLC | 500 | $20.2K | 0.01% | +500 | New |
| GWM Advisors LLC | 502 | $20.3K | 0.00% | −21−4.0% | Reduced |
| Spire Wealth Management | 503 | $20.3K | 0.00% | −7,284−93.5% | Reduced |
| Close Asset Management Ltd | 520 | $21.0K | 0.00% | 00.0% | Unchanged |
| Park Place Capital Corp | 545 | $22.0K | 0.00% | 00.0% | Unchanged |
| Colonial Trust Co | 544 | $22.2K | 0.00% | −39−6.7% | Reduced |
| Heritage Wealth Advisors | 593 | $23.9K | 0.00% | +517+680.3% | Added |
| Twin Lakes Capital Management, LLC | 619 | $25.0K | 0.01% | −16−2.5% | Reduced |
| GW&K Investment Management, LLC | 626 | $25.0K | 0.00% | +33+5.6% | Added |
| Timothy G. Youngquist 2020 Irrevocable Trust | 625 | $25.2K | 0.01% | +625 | New |
| Vega Investment Solutions | 629 | $25.4K | 0.01% | 00.0% | Unchanged |
| HFM Investment Advisors, LLC | 637 | $25.7K | 0.01% | −7−1.1% | Reduced |
| Bryn Mawr Trust Co | 640 | $25.8K | 0.00% | 00.0% | Unchanged |
| Bank of Jackson Hole Trust | 671 | $27.1K | 0.01% | −58−8.0% | Reduced |
| Zions Bancorporation, National Association | 732 | $29.5K | 0.00% | −1,344−64.7% | Reduced |
| True Wealth Design, LLC | 756 | $30.5K | 0.01% | +478+171.9% | Added |
| Select Equity Group, L.P. | 767 | $30.9K | 0.00% | +767 | New |
| CX Institutional | 851 | $34.0K | 0.00% | −2,434−74.1% | Reduced |
| EFG International AG | 865 | $34.9K | 0.00% | +865 | New |
| Transamerica Financial Advisors, Inc. | 868 | $35.0K | 0.00% | +581+202.4% | Added |
| Bank Julius Baer & Co. Ltd, Zurich | 880 | $35.5K | 0.00% | 00.0% | Unchanged |
| Kayne Anderson Rudnick Investment Management LLC | 892 | $36.0K | 0.00% | −634,828−99.9% | Reduced |
| TD Private Client Wealth LLC | 996 | $40.2K | 0.00% | −1,246−55.6% | Reduced |
| Whittier Trust Co of Nevada Inc | 976 | $40.2K | 0.00% | −414−29.8% | Reduced |
| Atlas Capital Advisors LLC | 1,032 | $41.6K | 0.00% | +1,032 | New |
| Versant Capital Management, Inc | 1,047 | $42.2K | 0.00% | −73−6.5% | Reduced |
| Winthrop Capital Management, LLC | 1,069 | $43.0K | 0.01% | +723+209.0% | Added |
| Onefund, LLC | 1,165 | $46.2K | 0.03% | −4−0.3% | Reduced |
| Atlantic Union Bankshares Corp | 1,202 | $48.5K | 0.00% | +155+14.8% | Added |
| Abound Wealth Management | 1,261 | $50.9K | 0.01% | +8+0.6% | Added |
| Cullen/Frost Bankers, Inc. | 1,276 | $51.5K | 0.00% | +1,040+440.7% | Added |
| Eurizon SLJ Capital Ltd | 1,279 | $51.6K | 0.02% | +35+2.8% | Added |
| HighMark Wealth Management LLC | 1,296 | $52.3K | 0.02% | 00.0% | Unchanged |
| Rothschild Investment LLC | 1,302 | $52.5K | 0.00% | −906−41.0% | Reduced |
| E Fund Management (Hong Kong) Co., Ltd. | 1,553 | $62.6K | 0.03% | 00.0% | Unchanged |
| IFP Advisors, Inc | 1,607 | $64.8K | 0.00% | +993+161.7% | Added |
| Steward Partners Investment Advisory, LLC | 1,621 | $65.4K | 0.00% | −1,482−47.8% | Reduced |
| Pin Oak Investment Advisors Inc | 1,672 | $67.0K | 0.05% | +639+61.9% | Added |
| Dara Capital US, Inc. | 1,732 | $69.9K | 0.07% | 00.0% | Unchanged |
| Financial Consulate, Inc | 1,734 | $70.0K | 0.01% | −1,626−48.4% | Reduced |
| Delta Asset Management LLC | 1,760 | $71.0K | 0.01% | 00.0% | Unchanged |
| Whittier Trust Co | 1,750 | $72.1K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 1,946 | $78.5K | 0.00% | −67,417−97.2% | Reduced |
| Clearstead Advisors, LLC | 1,963 | $79.2K | 0.00% | −158,549−98.8% | Reduced |
| Massmutual Trust Co FSB | 2,077 | $83.8K | 0.00% | +298+16.8% | Added |