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 |
|---|---|---|---|---|---|
| Public Employees Retirement System of Ohio | 122,921 | $4.96M | 0.02% | −3,919−3.1% | Reduced |
| Millennium Management LLC | 123,590 | $4.99M | 0.00% | −478,385−79.5% | Reduced |
| HighTower Advisors, LLC | 124,184 | $5.01M | 0.01% | −4,267−3.3% | Reduced |
| Botty Investors LLC | 127,000 | $5.12M | 1.22% | +127,000 | New |
| Twinbeech Capital LP | 128,016 | $5.16M | 0.53% | +125,016+4,167.2% | Added |
| EVR Research LP | 130,000 | $5.24M | 2.99% | +130,000 | New |
| Jones Financial Companies LLLP | 132,372 | $5.26M | 0.00% | +128,599+3,408.4% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 130,770 | $5.28M | 0.03% | +53,100+68.4% | Added |
| Resona Asset Management Co.,Ltd. | 131,014 | $5.30M | 0.03% | +5,737+4.6% | Added |
| Daiwa Securities Group Inc. | 131,902 | $5.32M | 0.02% | +7,399+5.9% | Added |
| Toronto Dominion Bank | 132,124 | $5.33M | 0.01% | −20,039−13.2% | Reduced |
| Louisbourg Investments Inc. | 175,086 | $5.39M | 1.02% | +84,764+93.8% | Added |
| Cetera Investment Advisers | 136,277 | $5.50M | 0.01% | −14,746−9.8% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 136,727 | $5.52M | 0.01% | −9,819−6.7% | Reduced |
| PensionDanmark Pensionsforsikringsaktieselskab | 137,966 | $5.57M | 0.05% | −9,204−6.3% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 138,317 | $5.58M | 0.03% | +2,291+1.7% | Added |
| Credit Agricole S A | 140,225 | $5.66M | 0.02% | −25,473−15.4% | Reduced |
| Needham Investment Management LLC | 142,000 | $5.73M | 0.29% | +81,500+134.7% | Added |
| Natixis Advisors, L.P. | 144,487 | $5.83M | 0.01% | −288,361−66.6% | Reduced |
| State of New Jersey Common Pension Fund D | 145,258 | $5.86M | 0.02% | 00.0% | Unchanged |
| Motley Fool Wealth Management, LLC | 153,002 | $6.17M | 0.70% | −50,446−24.8% | Reduced |
| KLP Kapitalforvaltning AS | 153,300 | $6.18M | 0.02% | 00.0% | Unchanged |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 155,726 | $6.28M | 0.03% | +57,142+58.0% | Added |
| Granahan Investment Management Inc | 161,047 | $6.50M | 0.31% | +69,118+75.2% | Added |
| Tredje AP-fonden | 161,654 | $6.52M | 0.04% | +120,971+297.4% | Added |
| Cerity Partners LLC | 162,482 | $6.55M | 0.01% | +70,935+77.5% | Added |
| Nomura Asset Management Co Ltd | 163,961 | $6.61M | 0.02% | +8,080+5.2% | Added |
| La Banque Postale Asset Management SA | 171,780 | $6.93M | 0.09% | +6,929+4.2% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 172,283 | $6.95M | 0.02% | −5,683−3.2% | Reduced |
| CIBC Asset Management Inc | 177,079 | $7.14M | 0.02% | −22,812−11.4% | Reduced |
| Treasurer of the State of North Carolina | 178,776 | $7.21M | 0.02% | +3,812+2.2% | Added |
| Tudor Investment Corp Et Al | 179,283 | $7.23M | 0.04% | −25,717−12.5% | Reduced |
| Cortland Associates Inc | 181,019 | $7.30M | 1.05% | −2,125−1.2% | Reduced |
| Public Employees Retirement Association of Colorado | 181,663 | $7.33M | 0.03% | −34,600−16.0% | Reduced |
| APG Asset Management N.V. | 210,304 | $7.36M | 0.02% | −8,052−3.7% | Reduced |
| Korea Investment CORP | 183,877 | $7.42M | 0.02% | −21,246−10.4% | Reduced |
| Asset Management One Co.,Ltd. | 185,487 | $7.48M | 0.02% | +2,096+1.1% | Added |
| DekaBank Deutsche Girozentrale | 183,640 | $7.51M | 0.01% | 00.0% | Unchanged |
| Sone Capital Management, LLC | 189,258 | $7.63M | 0.64% | −227,887−54.6% | Reduced |
| Ycg, LLC | 195,980 | $7.91M | 0.72% | −163,245−45.4% | Reduced |
| XTX Topco Ltd | 201,317 | $8.12M | 0.14% | +197,842+5,693.3% | Added |
| New York State Common Retirement Fund | 205,325 | $8.28M | 0.01% | −22,500−9.9% | Reduced |
| Prudential Financial Inc | 206,084 | $8.31M | 0.01% | −5,891−2.8% | Reduced |
| Glenmede Trust Co NA | 207,031 | $8.35M | 0.04% | +129,997+168.8% | Added |
| Danske Bank A/S | 207,435 | $8.37M | 0.02% | −10,926−5.0% | Reduced |
| Kornitzer Capital Management Inc | 207,766 | $8.38M | 0.18% | −16,650−7.4% | Reduced |
| Chevy Chase Trust Holdings, Inc. | 209,005 | $8.43M | 0.02% | −6,083−2.8% | Reduced |
| Vanguard Investments Australia, Ltd. | 210,994 | $8.51M | 0.02% | +210,994 | New |
| TD Asset Management Inc | 212,413 | $8.57M | 0.01% | −245,152−53.6% | Reduced |
| Nicholas Company, Inc. | 214,294 | $8.64M | 0.17% | +450.0% | Added |
| S.E.E.D. Planning Group LLC | 219,089 | $8.84M | 2.57% | +172,123+366.5% | Added |
| Lighthouse Investment Partners, LLC | 219,422 | $8.85M | 0.33% | +94,903+76.2% | Added |
| Tsai Capital Corp | 226,726 | $9.15M | 6.81% | +226,726 | New |
| Mirae Asset Global Investments Co., Ltd. | 227,680 | $9.18M | 0.03% | +17,585+8.4% | Added |
| Great West Life Assurance Co | 236,726 | $9.57M | 0.02% | −234−0.1% | Reduced |
| Aviva PLC | 243,053 | $9.80M | 0.02% | −39,165−13.9% | Reduced |
| Stifel Financial Corp | 245,213 | $9.89M | 0.01% | +3,495+1.4% | Added |
| Manufacturers Life Insurance Company, The | 248,749 | $10.0M | 0.01% | −3,468−1.4% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 246,634 | $10.1M | 0.02% | −21,779−8.1% | Reduced |
| Franklin Resources Inc | 249,573 | $10.1M | 0.00% | −912,849−78.5% | Reduced |
| FORA Capital, LLC | 252,068 | $10.2M | 0.74% | +252,068 | New |
| LMR Partners LLP | 252,950 | $10.2M | 0.09% | +252,950 | New |
| Susquehanna International Group, LLP | 254,329 | $10.3M | 0.01% | +59,645+30.6% | Added |
| Teachers Retirement System of the State of Kentucky | 269,783 | $10.9M | 0.08% | +3,000+1.1% | Added |
| SG Americas Securities, LLC | 272,347 | $11.0M | 0.01% | +37,454+15.9% | Added |
| Mizuho Markets Americas LLC | 275,876 | $11.1M | 0.31% | −4,140,240−93.8% | Reduced |
| State of Wisconsin Investment Board | 285,913 | $11.5M | 0.03% | +57,371+25.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 291,695 | $11.8M | 0.02% | −9,508−3.2% | Reduced |
| BSN Capital Partners Ltd | 150,857 | $11.8M | 0.30% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 303,004 | $12.2M | 0.01% | +303,004 | New |
| Rafferty Asset Management, LLC | 307,146 | $12.4M | 0.05% | +64,301+26.5% | Added |
| Y-Intercept (Hong Kong) Ltd | 311,918 | $12.6M | 0.24% | +290,667+1,367.8% | Added |
| Foster Victor Wealth Advisors, LLC | 340,762 | $12.8M | 0.73% | +142,783+72.1% | Added |
| Standard Life Aberdeen plc | 319,477 | $12.9M | 0.02% | +9,405+3.0% | Added |
| New York State Teachers Retirement System | 322,756 | $13.0M | 0.03% | 00.0% | Unchanged |
| Envestnet Portfolio Solutions, Inc. | 324,377 | $13.1M | 0.07% | +79,193+32.3% | Added |
| Victory Capital Management Inc | 335,433 | $13.5M | 0.01% | +440+0.1% | Added |
| Brown Advisory Inc | 337,021 | $13.6M | 0.02% | −1,569,324−82.3% | Reduced |
| ShawSpring Partners LLC | 339,081 | $13.7M | 5.11% | −618,476−64.6% | Reduced |
| FIL Ltd | 339,632 | $13.7M | 0.01% | −300,251−46.9% | Reduced |
| Quantinno Capital Management LP | 340,154 | $13.7M | 0.02% | +138,006+68.3% | Added |
| Oppenheimer Asset Management Inc. | 342,673 | $13.8M | 0.16% | +102,678+42.8% | Added |
| First Citizens Bank & Trust Co | 343,504 | $13.9M | 0.29% | +86,100+33.4% | Added |
| Russell Investments Group, Ltd. | 349,783 | $14.1M | 0.02% | −197,817−36.1% | Reduced |
| NEOS Investment Management LLC | 364,701 | $14.7M | 0.07% | +73,715+25.3% | Added |
| Fayez Sarofim & Co | 374,575 | $15.1M | 0.04% | −1,866,862−83.3% | Reduced |
| Ironvine Capital Partners, LLC | 375,331 | $15.1M | 1.66% | +4,107+1.1% | Added |
| Jupiter Asset Management Ltd | 375,741 | $15.2M | 0.08% | −1,487,963−79.8% | Reduced |
| State Board of Administration of Florida Retirement System | 376,003 | $15.2M | 0.03% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 378,100 | $15.3M | 0.02% | −4,500−1.2% | Reduced |
| SEI Investments Co | 386,558 | $15.6M | 0.01% | −235,221−37.8% | Reduced |
| Ossiam | 387,458 | $15.6M | 0.27% | +213,591+122.8% | Added |
| Ninety One UK Ltd | 414,986 | $16.7M | 0.04% | +60,182+17.0% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 423,589 | $17.1M | 0.04% | −54,247−11.4% | Reduced |
| Royal London Asset Management Ltd | 431,870 | $17.4M | 0.04% | +22,307+5.4% | Added |
| Geneva Capital Management LLC | 437,462 | $17.6M | 0.38% | −13,337−3.0% | Reduced |
| Gotham Asset Management, LLC | 447,016 | $18.0M | 0.06% | +316,669+242.9% | Added |
| Erste Asset Management GmbH | 450,000 | $18.4M | 0.17% | +130,000+40.6% | Added |
| Fiera Capital Corp | 481,711 | $19.4M | 0.07% | +130,781+37.3% | Added |
| Northwood Liquid Management LP | 483,200 | $19.5M | 1.31% | +483,200 | New |