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 |
|---|---|---|---|---|---|
| Whittier Trust Co | 1,750 | $72.1K | 0.00% | 00.0% | Unchanged |
| Delta Asset Management LLC | 1,760 | $71.0K | 0.01% | 00.0% | Unchanged |
| Financial Consulate, Inc | 1,734 | $70.0K | 0.01% | −1,626−48.4% | Reduced |
| Dara Capital US, Inc. | 1,732 | $69.9K | 0.07% | 00.0% | Unchanged |
| Pin Oak Investment Advisors Inc | 1,672 | $67.0K | 0.05% | +639+61.9% | Added |
| Steward Partners Investment Advisory, LLC | 1,621 | $65.4K | 0.00% | −1,482−47.8% | Reduced |
| IFP Advisors, Inc | 1,607 | $64.8K | 0.00% | +993+161.7% | Added |
| E Fund Management (Hong Kong) Co., Ltd. | 1,553 | $62.6K | 0.03% | 00.0% | Unchanged |
| Rothschild Investment LLC | 1,302 | $52.5K | 0.00% | −906−41.0% | Reduced |
| HighMark Wealth Management LLC | 1,296 | $52.3K | 0.02% | 00.0% | Unchanged |
| Eurizon SLJ Capital Ltd | 1,279 | $51.6K | 0.02% | +35+2.8% | Added |
| Cullen/Frost Bankers, Inc. | 1,276 | $51.5K | 0.00% | +1,040+440.7% | Added |
| Abound Wealth Management | 1,261 | $50.9K | 0.01% | +8+0.6% | Added |
| Atlantic Union Bankshares Corp | 1,202 | $48.5K | 0.00% | +155+14.8% | Added |
| Onefund, LLC | 1,165 | $46.2K | 0.03% | −4−0.3% | Reduced |
| Winthrop Capital Management, LLC | 1,069 | $43.0K | 0.01% | +723+209.0% | Added |
| Versant Capital Management, Inc | 1,047 | $42.2K | 0.00% | −73−6.5% | Reduced |
| Atlas Capital Advisors LLC | 1,032 | $41.6K | 0.00% | +1,032 | New |
| Whittier Trust Co of Nevada Inc | 976 | $40.2K | 0.00% | −414−29.8% | Reduced |
| TD Private Client Wealth LLC | 996 | $40.2K | 0.00% | −1,246−55.6% | Reduced |
| Kayne Anderson Rudnick Investment Management LLC | 892 | $36.0K | 0.00% | −634,828−99.9% | Reduced |
| Bank Julius Baer & Co. Ltd, Zurich | 880 | $35.5K | 0.00% | 00.0% | Unchanged |
| Transamerica Financial Advisors, Inc. | 868 | $35.0K | 0.00% | +581+202.4% | Added |
| EFG International AG | 865 | $34.9K | 0.00% | +865 | New |
| CX Institutional | 851 | $34.0K | 0.00% | −2,434−74.1% | Reduced |
| Select Equity Group, L.P. | 767 | $30.9K | 0.00% | +767 | New |
| True Wealth Design, LLC | 756 | $30.5K | 0.01% | +478+171.9% | Added |
| Zions Bancorporation, National Association | 732 | $29.5K | 0.00% | −1,344−64.7% | Reduced |
| Bank of Jackson Hole Trust | 671 | $27.1K | 0.01% | −58−8.0% | Reduced |
| Bryn Mawr Trust Co | 640 | $25.8K | 0.00% | 00.0% | Unchanged |
| HFM Investment Advisors, LLC | 637 | $25.7K | 0.01% | −7−1.1% | Reduced |
| Vega Investment Solutions | 629 | $25.4K | 0.01% | 00.0% | Unchanged |
| Timothy G. Youngquist 2020 Irrevocable Trust | 625 | $25.2K | 0.01% | +625 | New |
| GW&K Investment Management, LLC | 626 | $25.0K | 0.00% | +33+5.6% | Added |
| Twin Lakes Capital Management, LLC | 619 | $25.0K | 0.01% | −16−2.5% | Reduced |
| Heritage Wealth Advisors | 593 | $23.9K | 0.00% | +517+680.3% | Added |
| Colonial Trust Co | 544 | $22.2K | 0.00% | −39−6.7% | Reduced |
| Park Place Capital Corp | 545 | $22.0K | 0.00% | 00.0% | Unchanged |
| Close Asset Management Ltd | 520 | $21.0K | 0.00% | 00.0% | Unchanged |
| Spire Wealth Management | 503 | $20.3K | 0.00% | −7,284−93.5% | Reduced |
| GWM Advisors LLC | 502 | $20.3K | 0.00% | −21−4.0% | Reduced |
| WealthCollab, LLC | 500 | $20.2K | 0.01% | +500 | New |
| Rossby Financial, LCC | 503 | $19.9K | 0.00% | +45+9.8% | Added |
| Annis Gardner Whiting Capital Advisors, LLC | 487 | $19.6K | 0.00% | −21−4.1% | Reduced |
| TD Waterhouse Canada Inc. | 495 | $19.6K | 0.00% | +381+334.2% | Added |
| Harbour Investments, Inc. | 457 | $18.4K | 0.00% | +358+361.6% | Added |
| Private Trust Co NA | 451 | $18.2K | 0.00% | +171+61.1% | Added |
| Farmers & Merchants Investments Inc | 426 | $17.2K | 0.00% | +146+52.1% | Added |
| Salomon & Ludwin, LLC | 419 | $16.7K | 0.00% | +371+772.9% | Added |
| Hilltop National Bank | 380 | $15.3K | 0.00% | +380 | New |
| Westside Investment Management, Inc. | 360 | $14.4K | 0.00% | 00.0% | Unchanged |
| Owl Creek Wealth Partners LLC | 345 | $13.9K | 0.00% | +345 | New |
| Golden State Wealth Management, LLC | 335 | $13.5K | 0.00% | −3,838−92.0% | Reduced |
| Osterweis Capital Management Inc | 326 | $13.2K | 0.00% | +326 | New |
| Pinnacle Wealth Planning Services, Inc. | 310 | $12.5K | 0.00% | −828−72.8% | Reduced |
| Prosperity Bancshares Inc | 309 | $12.5K | 0.01% | +245+382.8% | Added |
| Bokf, NA | 302 | $12.2K | 0.00% | −3,133−91.2% | Reduced |
| Montag A & Associates Inc | 300 | $12.1K | 0.00% | 00.0% | Unchanged |
| Raiffeisen Bank International AG | 295 | $12.1K | 0.00% | −7,255−96.1% | Reduced |
| Avalon Trust Co | 297 | $12.0K | 0.00% | +297 | New |
| SBI Securities Co., Ltd. | 290 | $11.7K | 0.00% | −2−0.7% | Reduced |
| Catalyst Capital Advisors LLC | 279 | $11.3K | 0.00% | +51+22.4% | Added |
| Johnson Financial Group, Inc. | 264 | $10.7K | 0.00% | −456−63.3% | Reduced |
| McIlrath & Eck, LLC | 258 | $10.4K | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 257 | $10.4K | 0.00% | +34+15.2% | Added |
| Ronald Blue Trust, Inc. | 248 | $10.0K | 0.00% | +133+115.7% | Added |
| Chilton Capital Management LLC | 245 | $9.88K | 0.00% | 00.0% | Unchanged |
| Ancora Advisors, LLC | 244 | $9.84K | 0.00% | −175−41.8% | Reduced |
| South State Corp. | 234 | $9.44K | 0.00% | +17+7.8% | Added |
| Root Financial Partners, LLC | 231 | $9.32K | 0.00% | −41−15.1% | Reduced |
| JNBA Financial Advisors | 222 | $8.96K | 0.00% | +222 | New |
| WPG Advisers, LLC | 221 | $8.91K | 0.01% | −159−41.8% | Reduced |
| Cornerstone Planning Group LLC | 251 | $8.76K | 0.00% | +40+19.0% | Added |
| Birchwood Financial Partners, Inc. | 217 | $8.75K | 0.01% | −3−1.4% | Reduced |
| Capital Advisors, Ltd. LLC | 209 | $8.00K | 0.00% | +209 | New |
| Stance Capital LLC | 198 | $7.98K | 0.00% | +198 | New |
| First Command Advisory Services, Inc. | 187 | $7.54K | 0.00% | +187 | New |
| Westfuller Advisors, LLC | 186 | $7.50K | 0.00% | +120+181.8% | Added |
| Golden State Equity Partners | 184 | $7.42K | 0.00% | +184 | New |
| Wall Street Financial Group, Inc. | 179 | $7.22K | 0.00% | +179 | New |
| St Germain D J Co Inc | 176 | $7.10K | 0.00% | 00.0% | Unchanged |
| Atlantic Trust, LLC | 174 | $7.02K | 0.00% | +174 | New |
| Covestor Ltd | 167 | $7.00K | 0.00% | −95−36.3% | Reduced |
| Kemnay Advisory Services Inc. | 167 | $6.74K | 0.00% | +90+116.9% | Added |
| ZRC Wealth Management, LLC | 164 | $6.62K | 0.00% | +143+681.0% | Added |
| Swiss Re Ltd | 162 | $6.54K | 0.04% | 00.0% | Unchanged |
| CVA Family Office, LLC | 161 | $6.50K | 0.00% | −289−64.2% | Reduced |
| Private Wealth Asset Management, LLC | 159 | $6.41K | 0.00% | −2−1.2% | Reduced |
| Quaker Wealth Management, LLC | 149 | $6.01K | 0.00% | −3−2.0% | Reduced |
| Meramec Financial Planners, LLC | 146 | $5.85K | 0.00% | 00.0% | Unchanged |
| USA Financial Portformulas Corp | 143 | $5.77K | 0.00% | 00.0% | Unchanged |
| Rational Advisors LLC | 139 | $5.61K | 0.00% | 00.0% | Unchanged |
| Elequin Capital LP | 137 | $5.53K | 0.00% | +137 | New |
| Asset Dedication, LLC | 131 | $5.29K | 0.00% | 00.0% | Unchanged |
| Bayban | 120 | $4.84K | 0.00% | +120 | New |
| Richardson Capital Management LLC | 119 | $4.80K | 0.00% | +119 | New |
| MV Capital Management, Inc. | 114 | $4.60K | 0.00% | +72+171.4% | Added |
| Financial Network Wealth Advisors LLC | 110 | $4.44K | 0.00% | −320−74.4% | Reduced |
| Arlington Trust Co LLC | 110 | $4.44K | 0.00% | 00.0% | Unchanged |
| JPL Wealth Management, LLC | 104 | $4.20K | 0.00% | +104 | New |