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 |
|---|---|---|---|---|---|
| Stifel Financial Corp | 164,476 | $4.66M | 0.00% | −80,737−32.9% | Reduced |
| Andra AP-fonden | 164,500 | $4.66M | 0.05% | +164,500 | New |
| NEOS Investment Management LLC | 165,566 | $4.69M | 0.02% | −199,135−54.6% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 170,415 | $4.83M | 0.02% | +14,689+9.4% | Added |
| Great West Life Assurance Co | 171,538 | $4.85M | 0.01% | −65,188−27.5% | Reduced |
| Treasurer of the State of North Carolina | 172,126 | $4.88M | 0.01% | −6,650−3.7% | Reduced |
| Danske Bank A/S | 174,139 | $4.93M | 0.01% | −33,296−16.1% | Reduced |
| Jones Financial Companies LLLP | 165,912 | $5.02M | 0.00% | +33,540+25.3% | Added |
| Swedbank AB | 181,818 | $5.15M | 0.00% | +82,937+83.9% | Added |
| Asset Management One Co.,Ltd. | 184,921 | $5.24M | 0.01% | −566−0.3% | Reduced |
| Ameriprise Financial Inc | 185,807 | $5.25M | 0.00% | −501,969−73.0% | Reduced |
| Royal London Asset Management Ltd | 187,394 | $5.31M | 0.01% | −244,476−56.6% | Reduced |
| Louisbourg Investments Inc. | 256,336 | $5.50M | 1.01% | +81,250+46.4% | Added |
| Chevy Chase Trust Holdings, Inc. | 197,981 | $5.61M | 0.01% | −11,024−5.3% | Reduced |
| La Banque Postale Asset Management SA | 198,250 | $5.61M | 0.06% | +26,470+15.4% | Added |
| Prudential Financial Inc | 204,905 | $5.80M | 0.01% | −1,179−0.6% | Reduced |
| Omers Administration Corp | 207,870 | $5.89M | 0.04% | +186,252+861.6% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 208,895 | $6.05M | 0.01% | −37,739−15.3% | Reduced |
| Vanguard Investments Australia, Ltd. | 214,291 | $6.07M | 0.02% | +3,297+1.6% | Added |
| Holocene Advisors, LP | 216,209 | $6.12M | 0.01% | +123,221+132.5% | Added |
| Aquatic Capital Management LLC | 221,838 | $6.28M | 0.22% | +221,838 | New |
| Manufacturers Life Insurance Company, The | 226,560 | $6.42M | 0.01% | −22,189−8.9% | Reduced |
| DnB Asset Management AS | 226,668 | $6.42M | 0.02% | +138,446+156.9% | Added |
| Tremblant Capital Group | 228,535 | $6.47M | 0.19% | −1,277,496−84.8% | Reduced |
| Aviva PLC | 243,753 | $6.90M | 0.01% | +700+0.3% | Added |
| CIBC Bancorp USA Inc. | 238,168 | $7.04M | 0.01% | −261,945−52.4% | Reduced |
| APG Asset Management N.V. | 285,346 | $7.07M | 0.02% | +75,042+35.7% | Added |
| Sone Capital Management, LLC | 254,096 | $7.20M | 0.55% | +64,838+34.3% | Added |
| Cerity Partners LLC | 258,275 | $7.31M | 0.01% | +95,793+59.0% | Added |
| DekaBank Deutsche Girozentrale | 183,640 | $7.36M | 0.01% | 00.0% | Unchanged |
| Oppenheimer Asset Management Inc. | 265,401 | $7.52M | 0.08% | −77,272−22.5% | Reduced |
| Pathstone Holdings, LLC | 267,626 | $7.58M | 0.02% | +229,073+594.2% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 268,915 | $7.62M | 0.01% | +96,632+56.1% | Added |
| Teachers Retirement System of the State of Kentucky | 269,783 | $7.64M | 0.05% | 00.0% | Unchanged |
| Creative Planning | 272,391 | $7.71M | 0.00% | +175,160+180.1% | Added |
| XTX Topco Ltd | 280,134 | $7.93M | 0.10% | +78,817+39.2% | Added |
| S.E.E.D. Planning Group LLC | 291,843 | $8.26M | 2.18% | +72,754+33.2% | Added |
| Tsai Capital Corp | 294,211 | $8.33M | 6.16% | +67,485+29.8% | Added |
| Ironvine Capital Partners, LLC | 294,475 | $8.34M | 0.78% | −80,856−21.5% | Reduced |
| Standard Life Aberdeen plc | 312,332 | $8.85M | 0.01% | −7,145−2.2% | Reduced |
| New York State Teachers Retirement System | 320,465 | $9.08M | 0.02% | −2,291−0.7% | Reduced |
| Raymond James Financial Inc | 339,088 | $9.60M | 0.00% | −289,495−46.1% | Reduced |
| SEI Investments Co | 339,877 | $9.62M | 0.01% | −46,681−12.1% | Reduced |
| Envestnet Portfolio Solutions, Inc. | 341,444 | $9.67M | 0.05% | +17,067+5.3% | Added |
| Ossiam | 345,829 | $9.79M | 0.13% | −41,629−10.7% | Reduced |
| Ieq Capital, LLC | 351,667 | $9.96M | 0.05% | +252,423+254.3% | Added |
| Prana Capital Management, LP | 356,512 | $10.1M | 0.31% | −158,875−30.8% | Reduced |
| Mariner, LLC | 357,114 | $10.1M | 0.01% | +247,575+226.0% | Added |
| First Citizens Bank & Trust Co | 363,248 | $10.3M | 0.15% | +19,744+5.7% | Added |
| Adage Capital Partners GP, L.L.C. | 363,900 | $10.3M | 0.01% | −14,200−3.8% | Reduced |
| State Board of Administration of Florida Retirement System | 369,893 | $10.5M | 0.02% | −6,110−1.6% | Reduced |
| Ardmore Road Asset Management LP | 390,146 | $11.0M | 0.65% | −276,754−41.5% | Reduced |
| State of Wisconsin Investment Board | 400,286 | $11.3M | 0.02% | +114,373+40.0% | Added |
| Susquehanna International Group, LLP | 405,498 | $11.5M | 0.01% | +151,169+59.4% | Added |
| Ninety One UK Ltd | 408,359 | $11.6M | 0.03% | −6,627−1.6% | Reduced |
| Geneva Capital Management LLC | 418,102 | $11.8M | 0.27% | −19,360−4.4% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 420,878 | $11.9M | 0.24% | +108,960+34.9% | Added |
| Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management | 423,181 | $12.0M | 0.83% | −93,844−18.2% | Reduced |
| HRT Financial LP | 424,767 | $12.0M | 0.02% | +424,767 | New |
| Jacobs Levy Equity Management, Inc | 441,412 | $12.5M | 0.04% | +441,412 | New |
| FORA Capital, LLC | 443,586 | $12.6M | 0.86% | +191,518+76.0% | Added |
| ExodusPoint Capital Management, LP | 458,765 | $13.0M | 0.12% | +434,282+1,773.8% | Added |
| NZS Capital, LLC | 475,551 | $13.5M | 0.35% | −233,875−33.0% | Reduced |
| California Public Employees Retirement System | 478,042 | $13.5M | 0.01% | −54,641−10.3% | Reduced |
| New York State Common Retirement Fund | 487,676 | $13.8M | 0.02% | +282,351+137.5% | Added |
| United Asset Strategies, Inc. | 489,008 | $13.8M | 0.98% | +489,008 | New |
| Chicago Capital, LLC | 526,958 | $14.9M | 0.36% | −528,662−50.1% | Reduced |
| Quantinno Capital Management LP | 577,996 | $16.4M | 0.02% | +237,842+69.9% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 596,676 | $16.9M | 0.04% | +173,087+40.9% | Added |
| Tudor Investment Corp Et Al | 627,490 | $17.8M | 0.07% | +448,207+250.0% | Added |
| Gotham Asset Management, LLC | 635,988 | $18.0M | 0.04% | +188,972+42.3% | Added |
| Alliancebernstein L.P. | 458,488 | $18.5M | 0.01% | +50,980+12.5% | Added |
| Blair William & Co | 658,159 | $18.6M | 0.05% | −242,154−26.9% | Reduced |
| California State Teachers Retirement System | 680,684 | $19.3M | 0.02% | +13,573+2.0% | Added |
| Price T Rowe Associates Inc | 686,023 | $19.4M | 0.00% | −831,772−54.8% | Reduced |
| Peregrine Capital Management LLC | 692,753 | $19.6M | 0.64% | −6,399−0.9% | Reduced |
| Korea Investment CORP | 698,417 | $19.8M | 0.04% | +514,540+279.8% | Added |
| American Capital Management Inc | 725,143 | $20.5M | 0.92% | −100,153−12.1% | Reduced |
| Trexquant Investment LP | 740,241 | $21.0M | 0.13% | +667,174+913.1% | Added |
| Citadel Advisors LLC | 741,898 | $21.0M | 0.01% | −346,306−31.8% | Reduced |
| Millennium Management LLC | 746,995 | $21.2M | 0.01% | +623,405+504.4% | Added |
| Petrus Trust Company, LTA | 756,200 | $21.4M | 2.01% | 00.0% | Unchanged |
| Barclays PLC | 758,649 | $21.5M | 0.01% | −473,372−38.4% | Reduced |
| Russell Investments Group, Ltd. | 762,930 | $21.6M | 0.02% | +413,147+118.1% | Added |
| Vanguard Asset Management, Ltd | 772,828 | $21.9M | 0.01% | +55,158+7.7% | Added |
| Rhumbline Advisers | 790,116 | $22.4M | 0.02% | −2,647−0.3% | Reduced |
| Primecap Management Co | 821,600 | $23.3M | 0.01% | +18,000+2.2% | Added |
| Vanguard Global Advisers, LLC | 881,001 | $24.9M | 0.01% | −47,270−5.1% | Reduced |
| Citigroup Inc | 889,581 | $25.2M | 0.01% | −64,039−6.7% | Reduced |
| Capital Fund Management S.A. | 902,723 | $25.6M | 0.18% | +856,370+1,847.5% | Added |
| Man Group plc | 921,094 | $26.1M | 0.05% | +856,365+1,323.0% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 925,120 | $26.2M | 0.01% | −28,954−3.0% | Reduced |
| Colony Group, LLC | 936,775 | $26.5M | 0.03% | +14,657+1.6% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,015,380 | $28.8M | 0.02% | −36,461−3.5% | Reduced |
| D. E. Shaw & Co., Inc. | 1,043,332 | $29.5M | 0.02% | −4,866,291−82.3% | Reduced |
| Riverbridge Partners LLC | 1,091,535 | $30.9M | 0.86% | −135,856−11.1% | Reduced |
| Two Sigma Investments, LP | 1,104,950 | $31.3M | 0.02% | +801,946+264.7% | Added |
| Douglas Lane & Associates, LLC | 1,168,859 | $33.1M | 0.45% | +365,020+45.4% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 1,169,688 | $33.1M | 0.06% | +1,062,010+986.3% | Added |
| Swiss National Bank | 1,183,765 | $33.5M | 0.02% | −60,000−4.8% | Reduced |