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 |
|---|---|---|---|---|---|
| LPL Financial LLC | 118,841 | $4.79M | 0.00% | +1,393+1.2% | Added |
| Nissay Asset Management Corp | 117,937 | $4.76M | 0.03% | +2,995+2.6% | Added |
| State of Michigan Retirement System | 116,500 | $4.70M | 0.02% | −300−0.3% | Reduced |
| Czech National Bank | 115,426 | $4.66M | 0.03% | +3,671+3.3% | Added |
| Arizona State Retirement System | 115,162 | $4.65M | 0.03% | −1,263−1.1% | Reduced |
| State of Tennessee, Treasury Department | 114,343 | $4.61M | 0.02% | −2,154−1.8% | Reduced |
| Mariner, LLC | 109,539 | $4.42M | 0.01% | +61,522+128.1% | Added |
| Night Owl Capital Management, LLC | 109,244 | $4.41M | 0.51% | +629+0.6% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 107,678 | $4.34M | 0.01% | +107,678 | New |
| Abn Amro Investment Solutions | 103,876 | $4.19M | 0.05% | −468−0.4% | Reduced |
| Dash Acquisitions Inc. | 104,377 | $4.18M | 0.87% | +15,608+17.6% | Added |
| Ashford Capital Management Inc | 102,490 | $4.13M | 0.51% | −145,469−58.7% | Reduced |
| Winton Group Ltd | 101,423 | $4.09M | 0.14% | +101,423 | New |
| MetLife Investment Management | 101,261 | $4.08M | 0.02% | −2,729−2.6% | Reduced |
| Ieq Capital, LLC | 99,244 | $4.00M | 0.02% | +84,674+581.2% | Added |
| Swedbank AB | 98,881 | $3.99M | 0.00% | −204,324−67.4% | Reduced |
| Creative Planning | 97,231 | $3.92M | 0.00% | +42,741+78.4% | Added |
| Boston Private Wealth LLC | 96,060 | $3.88M | 0.26% | +29,650+44.6% | Added |
| Bank of Nova Scotia | 94,485 | $3.81M | 0.01% | +13,450+16.6% | Added |
| Holocene Advisors, LP | 92,988 | $3.75M | 0.01% | +92,988 | New |
| KBC Group NV | 91,783 | $3.70M | 0.01% | −1,752−1.9% | Reduced |
| Gilder Gagnon Howe & Co LLC | 91,094 | $3.67M | 0.04% | −148,940−62.0% | Reduced |
| Retirement Systems of Alabama | 90,000 | $3.63M | 0.01% | −161−0.2% | Reduced |
| Rakuten Investment Management, Inc. | 88,316 | $3.61M | 0.01% | +9,694+12.3% | Added |
| Guggenheim Capital LLC | 88,384 | $3.57M | 0.03% | −20,462−18.8% | Reduced |
| DnB Asset Management AS | 88,222 | $3.56M | 0.01% | +3,015+3.5% | Added |
| GF Fund Management Co. Ltd. | 86,853 | $3.50M | 0.06% | −2,546−2.8% | Reduced |
| Nordea Investment Management AB | 87,230 | $3.48M | 0.00% | +42,655+95.7% | Added |
| IFM Investors Pty Ltd | 85,669 | $3.46M | 0.03% | +2,711+3.3% | Added |
| Oak Thistle LLC | 84,867 | $3.42M | 0.33% | +64,553+317.8% | Added |
| The PNC Financial Services Group, Inc. | 84,690 | $3.42M | 0.00% | +8,437+11.1% | Added |
| Voya Investment Management LLC | 84,543 | $3.41M | 0.00% | −140−0.2% | Reduced |
| Exchange Traded Concepts, LLC | 84,449 | $3.41M | 0.03% | +17,552+26.2% | Added |
| Caxton Associates LLP | 83,948 | $3.39M | 0.08% | +83,948 | New |
| SEB Asset Management AB | 83,393 | $3.36M | 0.01% | +83,393 | New |
| Woodline Partners LP | 83,013 | $3.35M | 0.01% | +10,704+14.8% | Added |
| Atria Investments LLC | 81,821 | $3.30M | 0.04% | +41,024+100.6% | Added |
| Solidarilty Wealth, LLC | 81,303 | $3.28M | 0.63% | +20,634+34.0% | Added |
| STRS Ohio | 80,988 | $3.27M | 0.01% | −150.0% | Reduced |
| Fifth Third Bancorp | 80,738 | $3.26M | 0.01% | +72,872+926.4% | Added |
| MML Investors Services, LLC | 80,237 | $3.24M | 0.01% | −12,040−13.0% | Reduced |
| Mirova | 78,550 | $3.17M | 0.13% | +78,550 | New |
| Amalgamated Bank | 78,350 | $3.16M | 0.02% | −1,473−1.8% | Reduced |
| CI Private Wealth, LLC | 79,401 | $3.16M | 0.00% | −7,599−8.7% | Reduced |
| USS Investment Management Ltd | 78,020 | $3.14M | 0.01% | +3,398+4.6% | Added |
| ICICI Prudential Asset Management Co Ltd | 77,557 | $3.13M | 0.38% | +70,756+1,040.4% | Added |
| Platinum Investment Management Ltd | 77,500 | $3.13M | 0.79% | +12,500+19.2% | Added |
| Xponance, Inc. | 76,531 | $3.09M | 0.02% | +9,328+13.9% | Added |
| Edgestream Partners, L.P. | 74,431 | $3.00M | 0.10% | +58,626+370.9% | Added |
| Vanderbilt University | 73,753 | $2.98M | 0.57% | −53,507−42.0% | Reduced |
| Trexquant Investment LP | 73,067 | $2.95M | 0.02% | +73,067 | New |
| Walleye Trading LLC | 72,509 | $2.93M | 0.06% | +60,518+504.7% | Added |
| Quantitative Investment Management, LLC | 71,716 | $2.89M | 0.30% | +35,967+100.6% | Added |
| Blue Zone Wealth Advisors, LLC | 71,468 | $2.88M | 0.59% | −88−0.1% | Reduced |
| Havemeyer Place LP | 71,065 | $2.87M | 0.33% | +67,840+2,103.6% | Added |
| CWM Advisors, LLC | 70,345 | $2.84M | 0.17% | +26,873+61.8% | Added |
| Tower Research Capital LLC (TRC) | 70,016 | $2.82M | 0.07% | +41,796+148.1% | Added |
| Utah Retirement Systems | 67,788 | $2.73M | 0.03% | −1,127−1.6% | Reduced |
| HB Wealth Management, LLC | 66,457 | $2.68M | 0.02% | −7,347−10.0% | Reduced |
| Linden Thomas Advisory Services, LLC | 66,059 | $2.66M | 0.26% | +25,249+61.9% | Added |
| Man Group plc | 64,729 | $2.61M | 0.01% | −160,524−71.3% | Reduced |
| Buttonwood Financial Advisors Inc. | 64,632 | $2.61M | 0.87% | +57,551+812.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 64,132 | $2.59M | 0.02% | +275+0.4% | Added |
| Employees Retirement System of Texas | 63,224 | $2.55M | 0.02% | 00.0% | Unchanged |
| American Century Companies Inc | 61,958 | $2.50M | 0.00% | −14,637−19.1% | Reduced |
| Neuberger Berman Group LLC | 61,102 | $2.46M | 0.00% | −108,565−64.0% | Reduced |
| US Bancorp | 59,293 | $2.39M | 0.00% | −5,192−8.1% | Reduced |
| Ivy Lane Capital Management, LLC | 59,000 | $2.38M | 3.60% | +59,000 | New |
| New York Life Investment Management LLC | 58,686 | $2.37M | 0.02% | +762+1.3% | Added |
| British Columbia Investment Management Corp | 58,402 | $2.36M | 0.01% | −16,736−22.3% | Reduced |
| Americana Partners, LLC | 57,568 | $2.32M | 0.06% | +50,190+680.3% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 57,483 | $2.32M | 0.02% | −14,107−19.7% | Reduced |
| Allianz SE | 56,052 | $2.26M | 0.03% | 00.0% | Unchanged |
| North Star Asset Management Inc | 54,422 | $2.20M | 0.10% | +15,920+41.3% | Added |
| UniSuper Management Pty Ltd | 53,667 | $2.16M | 0.01% | +7,023+15.1% | Added |
| Itau Unibanco Holding S.A. | 52,539 | $2.12M | 0.05% | −35,148−40.1% | Reduced |
| Sequoia Financial Advisors, LLC | 51,688 | $2.09M | 0.01% | +2,324+4.7% | Added |
| Captrust Financial Advisors | 51,351 | $2.07M | 0.00% | +18,117+54.5% | Added |
| Truist Financial Corp | 51,118 | $2.06M | 0.00% | −31,120−37.8% | Reduced |
| iA Global Asset Management Inc. | 50,393 | $2.03M | 0.03% | −2,287−4.3% | Reduced |
| CWM, LLC | 49,740 | $2.01M | 0.01% | +29,023+140.1% | Added |
| Louisiana State Employees Retirement System | 49,200 | $1.98M | 0.03% | −800−1.6% | Reduced |
| Wellington Management Group LLP | 48,913 | $1.97M | 0.00% | −4,755−8.9% | Reduced |
| Swiss Life Asset Management Ltd | 48,719 | $1.97M | 0.01% | +9,544+24.4% | Added |
| Shelton Capital Management | 48,672 | $1.96M | 0.04% | −91−0.2% | Reduced |
| Oregon Public Employees Retirement Fund | 48,524 | $1.96M | 0.03% | 00.0% | Unchanged |
| Brinker Capital Investments, LLC | 48,446 | $1.95M | 0.02% | +23,725+96.0% | Added |
| Mercer Global Advisors Inc | 47,777 | $1.93M | 0.00% | +18,772+64.7% | Added |
| Pacer Advisors, Inc. | 47,092 | $1.90M | 0.01% | −17,238−26.8% | Reduced |
| Hahn Capital Management LLC | 46,447 | $1.87M | 1.18% | −9,401−16.8% | Reduced |
| Capital Fund Management S.A. | 46,353 | $1.87M | 0.02% | +46,353 | New |
| Robeco Institutional Asset Management B.V. | 46,018 | $1.86M | 0.00% | −22,137−32.5% | Reduced |
| National Bank of Canada | 45,497 | $1.84M | 0.00% | −308,118−87.1% | Reduced |
| Mutual of America Capital Management LLC | 45,078 | $1.82M | 0.02% | −14,501−24.3% | Reduced |
| Numerai GP LLC | 44,219 | $1.78M | 0.18% | +14,084+46.7% | Added |
| Federation des caisses Desjardins du Quebec | 44,041 | $1.78M | 0.01% | +29,099+194.7% | Added |
| Verdence Capital Advisors LLC | 43,924 | $1.77M | 0.10% | +19,154+77.3% | Added |
| New Age Alpha Advisors, LLC | 43,662 | $1.76M | 0.08% | −1,515−3.4% | Reduced |
| OP Asset Management Ltd | 43,384 | $1.75M | 0.02% | −2,898−6.3% | Reduced |
| Yousif Capital Management, LLC | 42,682 | $1.72M | 0.02% | −726−1.7% | Reduced |