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 |
|---|---|---|---|---|---|
| Gotham Asset Management, LLC | 447,016 | $18.0M | 0.06% | +316,669+242.9% | Added |
| Geneva Capital Management LLC | 437,462 | $17.6M | 0.38% | −13,337−3.0% | Reduced |
| Royal London Asset Management Ltd | 431,870 | $17.4M | 0.04% | +22,307+5.4% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 423,589 | $17.1M | 0.04% | −54,247−11.4% | Reduced |
| Ninety One UK Ltd | 414,986 | $16.7M | 0.04% | +60,182+17.0% | Added |
| Ossiam | 387,458 | $15.6M | 0.27% | +213,591+122.8% | Added |
| SEI Investments Co | 386,558 | $15.6M | 0.01% | −235,221−37.8% | Reduced |
| Adage Capital Partners GP, L.L.C. | 378,100 | $15.3M | 0.02% | −4,500−1.2% | Reduced |
| State Board of Administration of Florida Retirement System | 376,003 | $15.2M | 0.03% | 00.0% | Unchanged |
| Jupiter Asset Management Ltd | 375,741 | $15.2M | 0.08% | −1,487,963−79.8% | Reduced |
| Ironvine Capital Partners, LLC | 375,331 | $15.1M | 1.66% | +4,107+1.1% | Added |
| Fayez Sarofim & Co | 374,575 | $15.1M | 0.04% | −1,866,862−83.3% | Reduced |
| NEOS Investment Management LLC | 364,701 | $14.7M | 0.07% | +73,715+25.3% | Added |
| Russell Investments Group, Ltd. | 349,783 | $14.1M | 0.02% | −197,817−36.1% | Reduced |
| First Citizens Bank & Trust Co | 343,504 | $13.9M | 0.29% | +86,100+33.4% | Added |
| Oppenheimer Asset Management Inc. | 342,673 | $13.8M | 0.16% | +102,678+42.8% | Added |
| Quantinno Capital Management LP | 340,154 | $13.7M | 0.02% | +138,006+68.3% | Added |
| FIL Ltd | 339,632 | $13.7M | 0.01% | −300,251−46.9% | Reduced |
| ShawSpring Partners LLC | 339,081 | $13.7M | 5.11% | −618,476−64.6% | Reduced |
| Brown Advisory Inc | 337,021 | $13.6M | 0.02% | −1,569,324−82.3% | Reduced |
| Victory Capital Management Inc | 335,433 | $13.5M | 0.01% | +440+0.1% | Added |
| Envestnet Portfolio Solutions, Inc. | 324,377 | $13.1M | 0.07% | +79,193+32.3% | Added |
| New York State Teachers Retirement System | 322,756 | $13.0M | 0.03% | 00.0% | Unchanged |
| Standard Life Aberdeen plc | 319,477 | $12.9M | 0.02% | +9,405+3.0% | Added |
| Foster Victor Wealth Advisors, LLC | 340,762 | $12.8M | 0.73% | +142,783+72.1% | Added |
| Y-Intercept (Hong Kong) Ltd | 311,918 | $12.6M | 0.24% | +290,667+1,367.8% | Added |
| Rafferty Asset Management, LLC | 307,146 | $12.4M | 0.05% | +64,301+26.5% | Added |
| Two Sigma Investments, LP | 303,004 | $12.2M | 0.01% | +303,004 | New |
| BSN Capital Partners Ltd | 150,857 | $11.8M | 0.30% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 291,695 | $11.8M | 0.02% | −9,508−3.2% | Reduced |
| State of Wisconsin Investment Board | 285,913 | $11.5M | 0.03% | +57,371+25.1% | Added |
| Mizuho Markets Americas LLC | 275,876 | $11.1M | 0.31% | −4,140,240−93.8% | Reduced |
| SG Americas Securities, LLC | 272,347 | $11.0M | 0.01% | +37,454+15.9% | Added |
| Teachers Retirement System of the State of Kentucky | 269,783 | $10.9M | 0.08% | +3,000+1.1% | Added |
| Susquehanna International Group, LLP | 254,329 | $10.3M | 0.01% | +59,645+30.6% | Added |
| LMR Partners LLP | 252,950 | $10.2M | 0.09% | +252,950 | New |
| FORA Capital, LLC | 252,068 | $10.2M | 0.74% | +252,068 | New |
| Franklin Resources Inc | 249,573 | $10.1M | 0.00% | −912,849−78.5% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 246,634 | $10.1M | 0.02% | −21,779−8.1% | Reduced |
| Manufacturers Life Insurance Company, The | 248,749 | $10.0M | 0.01% | −3,468−1.4% | Reduced |
| Stifel Financial Corp | 245,213 | $9.89M | 0.01% | +3,495+1.4% | Added |
| Aviva PLC | 243,053 | $9.80M | 0.02% | −39,165−13.9% | Reduced |
| Great West Life Assurance Co | 236,726 | $9.57M | 0.02% | −234−0.1% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 227,680 | $9.18M | 0.03% | +17,585+8.4% | Added |
| Tsai Capital Corp | 226,726 | $9.15M | 6.81% | +226,726 | New |
| Lighthouse Investment Partners, LLC | 219,422 | $8.85M | 0.33% | +94,903+76.2% | Added |
| S.E.E.D. Planning Group LLC | 219,089 | $8.84M | 2.57% | +172,123+366.5% | Added |
| Nicholas Company, Inc. | 214,294 | $8.64M | 0.17% | +450.0% | Added |
| TD Asset Management Inc | 212,413 | $8.57M | 0.01% | −245,152−53.6% | Reduced |
| Vanguard Investments Australia, Ltd. | 210,994 | $8.51M | 0.02% | +210,994 | New |
| Chevy Chase Trust Holdings, Inc. | 209,005 | $8.43M | 0.02% | −6,083−2.8% | Reduced |
| Kornitzer Capital Management Inc | 207,766 | $8.38M | 0.18% | −16,650−7.4% | Reduced |
| Danske Bank A/S | 207,435 | $8.37M | 0.02% | −10,926−5.0% | Reduced |
| Glenmede Trust Co NA | 207,031 | $8.35M | 0.04% | +129,997+168.8% | Added |
| Prudential Financial Inc | 206,084 | $8.31M | 0.01% | −5,891−2.8% | Reduced |
| New York State Common Retirement Fund | 205,325 | $8.28M | 0.01% | −22,500−9.9% | Reduced |
| XTX Topco Ltd | 201,317 | $8.12M | 0.14% | +197,842+5,693.3% | Added |
| Ycg, LLC | 195,980 | $7.91M | 0.72% | −163,245−45.4% | Reduced |
| Sone Capital Management, LLC | 189,258 | $7.63M | 0.64% | −227,887−54.6% | Reduced |
| DekaBank Deutsche Girozentrale | 183,640 | $7.51M | 0.01% | 00.0% | Unchanged |
| Asset Management One Co.,Ltd. | 185,487 | $7.48M | 0.02% | +2,096+1.1% | Added |
| Korea Investment CORP | 183,877 | $7.42M | 0.02% | −21,246−10.4% | Reduced |
| APG Asset Management N.V. | 210,304 | $7.36M | 0.02% | −8,052−3.7% | Reduced |
| Public Employees Retirement Association of Colorado | 181,663 | $7.33M | 0.03% | −34,600−16.0% | Reduced |
| Cortland Associates Inc | 181,019 | $7.30M | 1.05% | −2,125−1.2% | Reduced |
| Tudor Investment Corp Et Al | 179,283 | $7.23M | 0.04% | −25,717−12.5% | Reduced |
| Treasurer of the State of North Carolina | 178,776 | $7.21M | 0.02% | +3,812+2.2% | Added |
| CIBC Asset Management Inc | 177,079 | $7.14M | 0.02% | −22,812−11.4% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 172,283 | $6.95M | 0.02% | −5,683−3.2% | Reduced |
| La Banque Postale Asset Management SA | 171,780 | $6.93M | 0.09% | +6,929+4.2% | Added |
| Nomura Asset Management Co Ltd | 163,961 | $6.61M | 0.02% | +8,080+5.2% | Added |
| Cerity Partners LLC | 162,482 | $6.55M | 0.01% | +70,935+77.5% | Added |
| Tredje AP-fonden | 161,654 | $6.52M | 0.04% | +120,971+297.4% | Added |
| Granahan Investment Management Inc | 161,047 | $6.50M | 0.31% | +69,118+75.2% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 155,726 | $6.28M | 0.03% | +57,142+58.0% | Added |
| KLP Kapitalforvaltning AS | 153,300 | $6.18M | 0.02% | 00.0% | Unchanged |
| Motley Fool Wealth Management, LLC | 153,002 | $6.17M | 0.70% | −50,446−24.8% | Reduced |
| State of New Jersey Common Pension Fund D | 145,258 | $5.86M | 0.02% | 00.0% | Unchanged |
| Natixis Advisors, L.P. | 144,487 | $5.83M | 0.01% | −288,361−66.6% | Reduced |
| Needham Investment Management LLC | 142,000 | $5.73M | 0.29% | +81,500+134.7% | Added |
| Credit Agricole S A | 140,225 | $5.66M | 0.02% | −25,473−15.4% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 138,317 | $5.58M | 0.03% | +2,291+1.7% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 137,966 | $5.57M | 0.05% | −9,204−6.3% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 136,727 | $5.52M | 0.01% | −9,819−6.7% | Reduced |
| Cetera Investment Advisers | 136,277 | $5.50M | 0.01% | −14,746−9.8% | Reduced |
| Louisbourg Investments Inc. | 175,086 | $5.39M | 1.02% | +84,764+93.8% | Added |
| Toronto Dominion Bank | 132,124 | $5.33M | 0.01% | −20,039−13.2% | Reduced |
| Daiwa Securities Group Inc. | 131,902 | $5.32M | 0.02% | +7,399+5.9% | Added |
| Resona Asset Management Co.,Ltd. | 131,014 | $5.30M | 0.03% | +5,737+4.6% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 130,770 | $5.28M | 0.03% | +53,100+68.4% | Added |
| Jones Financial Companies LLLP | 132,372 | $5.26M | 0.00% | +128,599+3,408.4% | Added |
| EVR Research LP | 130,000 | $5.24M | 2.99% | +130,000 | New |
| Twinbeech Capital LP | 128,016 | $5.16M | 0.53% | +125,016+4,167.2% | Added |
| Botty Investors LLC | 127,000 | $5.12M | 1.22% | +127,000 | New |
| HighTower Advisors, LLC | 124,184 | $5.01M | 0.01% | −4,267−3.3% | Reduced |
| Millennium Management LLC | 123,590 | $4.99M | 0.00% | −478,385−79.5% | Reduced |
| Public Employees Retirement System of Ohio | 122,921 | $4.96M | 0.02% | −3,919−3.1% | Reduced |
| Handelsbanken Fonder AB | 121,880 | $4.92M | 0.02% | +3,383+2.9% | Added |
| Public Sector Pension Investment Board | 120,605 | $4.87M | 0.02% | +12,696+11.8% | Added |
| Landmark Investment Partners, L.P. | 119,966 | $4.84M | 5.00% | −34,514−22.3% | Reduced |