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, Q4 2025
Institutional positions in Costar Group, Inc. as of Dec 31, 2025. 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
- 847
- −40 vs. Q3 2025
- Shares held
- 422.7M
- +11.7M (+2.8%) vs. Q3 2025
- Total value
- $28.4B
- −$6.23B (−18.0%) vs. Q3 2025
- New holders
- 103
- 273 more added
- Sold out
- 143
- 388 more reduced
18 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Tower Research Capital LLC (TRC) | 28,220 | $1.90M | 0.05% | +9,863+53.7% | Added |
| Principal Securities, Inc. | 28,274 | $1.90M | 0.03% | −3,512−11.0% | Reduced |
| Lido Advisors, LLC | 25,929 | $1.90M | 0.01% | −1,607−5.8% | Reduced |
| Liontrust Investment Partners LLP | 28,324 | $1.90M | 0.03% | 00.0% | Unchanged |
| Gateway Investment Advisers LLC | 28,779 | $1.94M | 0.02% | −2,738−8.7% | Reduced |
| Stephens Inc | 28,916 | $1.94M | 0.02% | −1,878−6.1% | Reduced |
| Mercer Global Advisors Inc | 29,005 | $1.95M | 0.00% | −3,524−10.8% | Reduced |
| Numerai GP LLC | 30,135 | $2.03M | 0.24% | +30,135 | New |
| Malaga Cove Capital, LLC | 30,776 | $2.07M | 0.72% | +4,231+15.9% | Added |
| Mizuho Securities USA LLC | 30,860 | $2.12M | 0.04% | +40.0% | Added |
| Harvest Fund Management Co., Ltd | 31,644 | $2.13M | 0.08% | +5,643+21.7% | Added |
| Centaurus Financial, Inc. | 31,720 | $2.13M | 0.10% | −1,767−5.3% | Reduced |
| Delta Global Management LP | 31,841 | $2.14M | 0.16% | +31,841 | New |
| Barbara Oil Co. | 32,000 | $2.15M | 0.80% | 00.0% | Unchanged |
| SlateStone Wealth, LLC | 32,226 | $2.17M | 0.18% | −6,303−16.4% | Reduced |
| Sterling Capital Management LLC | 32,306 | $2.17M | 0.04% | −39,758−55.2% | Reduced |
| Walleye Capital LLC | 32,462 | $2.18M | 0.01% | +17,100+111.3% | Added |
| Schroder Investment Management Group | 33,183 | $2.23M | 0.00% | −4,982−13.1% | Reduced |
| Captrust Financial Advisors | 33,234 | $2.23M | 0.00% | +4,984+17.6% | Added |
| Papp L Roy & Associates | 33,254 | $2.24M | 0.25% | +46+0.1% | Added |
| Scotia Capital Inc. | 33,356 | $2.24M | 0.01% | +1,235+3.8% | Added |
| Nisa Investment Advisors, LLC | 33,462 | $2.25M | 0.01% | −5,389−13.9% | Reduced |
| D.A. Davidson & Co. | 33,582 | $2.26M | 0.01% | −1,086−3.1% | Reduced |
| Allstate Corp | 33,862 | $2.28M | 0.03% | +17,764+110.3% | Added |
| Formula Growth Ltd | 34,000 | $2.29M | 0.88% | 00.0% | Unchanged |
| EagleClaw Capital Managment, LLC | 34,150 | $2.30M | 0.33% | +300+0.9% | Added |
| Weiss Asset Management LP | 34,320 | $2.31M | 0.03% | +34,320 | New |
| Boomfish Wealth Group, LLC | 34,474 | $2.32M | 1.24% | +2,052+6.3% | Added |
| Quantitative Investment Management, LLC | 35,749 | $2.40M | 0.23% | +35,749 | New |
| Katamaran Capital LLP | 36,651 | $2.46M | 1.86% | +36,651 | New |
| Cambridge Investment Research Advisors, Inc. | 37,851 | $2.54M | 0.01% | +130.0% | Added |
| North Star Asset Management Inc | 38,502 | $2.59M | 0.10% | +3,563+10.2% | Added |
| Investment Management Corp of Ontario | 38,843 | $2.61M | 0.03% | +19,023+96.0% | Added |
| Janney Montgomery Scott LLC | 39,121 | $2.63M | 0.01% | −10,960−21.9% | Reduced |
| Swiss Life Asset Management Ltd | 39,175 | $2.63M | 0.01% | −607−1.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 39,225 | $2.64M | 0.01% | +25,645+188.8% | Added |
| Norinchukin Bank, The | 39,320 | $2.64M | 0.03% | +3,781+10.6% | Added |
| Oppenheimer & Co Inc | 39,791 | $2.68M | 0.04% | −4,039−9.2% | Reduced |
| O'Shaughnessy Asset Management, LLC | 39,802 | $2.68M | 0.01% | −22,916−36.5% | Reduced |
| Northwestern Mutual Wealth Management Co | 39,867 | $2.68M | 0.00% | −15,367−27.8% | Reduced |
| Motley Fool Asset Management LLC | 40,343 | $2.71M | 0.11% | −43,691−52.0% | Reduced |
| Profund Advisors LLC | 40,671 | $2.73M | 0.08% | +4,344+12.0% | Added |
| Tredje AP-fonden | 40,683 | $2.74M | 0.02% | 00.0% | Unchanged |
| Atria Investments LLC | 40,797 | $2.74M | 0.03% | −14,224−25.9% | Reduced |
| Linden Thomas Advisory Services, LLC | 40,810 | $2.74M | 0.28% | −2,397−5.5% | Reduced |
| Yousif Capital Management, LLC | 43,408 | $2.77M | 0.03% | −3,728−7.9% | Reduced |
| Knollwood Investment Advisory, LLC | 41,863 | $2.81M | 0.26% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 41,886 | $2.82M | 0.03% | −3,795−8.3% | Reduced |
| NFJ Investment Group, LLC | 42,415 | $2.85M | 0.10% | −58,810−58.1% | Reduced |
| Davidson Kahn Capital Management, LLC | 42,831 | $2.88M | 1.50% | +3,475+8.8% | Added |
| CWM Advisors, LLC | 43,472 | $2.92M | 0.26% | −1,438−3.2% | Reduced |
| Nordea Investment Management AB | 44,575 | $2.99M | 0.00% | +3,829+9.4% | Added |
| New Age Alpha Advisors, LLC | 45,177 | $3.04M | 0.13% | +7,943+21.3% | Added |
| Taikang Asset Management (Hong Kong) Co Ltd | 45,969 | $3.09M | 0.31% | 00.0% | Unchanged |
| OP Asset Management Ltd | 46,282 | $3.11M | 0.04% | −2,857−5.8% | Reduced |
| UniSuper Management Pty Ltd | 46,644 | $3.14M | 0.02% | +2,007+4.5% | Added |
| S.E.E.D. Planning Group LLC | 46,966 | $3.16M | 0.90% | +2,233+5.0% | Added |
| Mariner, LLC | 48,017 | $3.23M | 0.00% | −7,552−13.6% | Reduced |
| Oregon Public Employees Retirement Fund | 48,524 | $3.26M | 0.04% | +100+0.2% | Added |
| Shelton Capital Management | 48,763 | $3.28M | 0.06% | 00.0% | Unchanged |
| Sequoia Financial Advisors, LLC | 49,364 | $3.32M | 0.02% | −1,947−3.8% | Reduced |
| Louisiana State Employees Retirement System | 50,000 | $3.36M | 0.06% | −3,100−5.8% | Reduced |
| LGT Fund Management Co Ltd. | 50,530 | $3.43M | 0.27% | −1,531−2.9% | Reduced |
| iA Global Asset Management Inc. | 52,680 | $3.54M | 0.05% | +3,631+7.4% | Added |
| Wellington Management Group LLP | 53,668 | $3.61M | 0.00% | −12,746−19.2% | Reduced |
| Creative Planning | 54,490 | $3.66M | 0.00% | +4,066+8.1% | Added |
| Hahn Capital Management LLC | 55,848 | $3.76M | 2.03% | −3,809−6.4% | Reduced |
| Regions Financial Corp | 55,929 | $3.76M | 0.02% | −3,064−5.2% | Reduced |
| Allianz SE | 56,052 | $3.77M | 0.05% | 00.0% | Unchanged |
| Van Eck Associates Corp | 56,524 | $3.80M | 0.00% | −1,337−2.3% | Reduced |
| New York Life Investment Management LLC | 57,924 | $3.89M | 0.03% | +576+1.0% | Added |
| Mutual of America Capital Management LLC | 59,579 | $4.01M | 0.04% | +5,869+10.9% | Added |
| Needham Investment Management LLC | 60,500 | $4.07M | 0.26% | +57,250+1,761.5% | Added |
| Solidarilty Wealth, LLC | 60,669 | $4.08M | 0.83% | +4,553+8.1% | Added |
| Employees Retirement System of Texas | 63,224 | $4.25M | 0.03% | +21,852+52.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 63,857 | $4.29M | 0.04% | −3,335−5.0% | Reduced |
| Comerica Bank | 64,101 | $4.31M | 0.02% | −12,812−16.7% | Reduced |
| Eurizon Capital SGR S.p.A. | 64,276 | $4.32M | 0.01% | +64,276 | New |
| Pacer Advisors, Inc. | 64,330 | $4.33M | 0.01% | +1,029+1.6% | Added |
| US Bancorp | 64,485 | $4.34M | 0.01% | −3,575−5.3% | Reduced |
| ING Groep NV | 64,844 | $4.36M | 0.03% | −63,208−49.4% | Reduced |
| Platinum Investment Management Ltd | 65,000 | $4.37M | 1.01% | +10,000+18.2% | Added |
| Boston Private Wealth LLC | 66,410 | $4.47M | 0.26% | +32,923+98.3% | Added |
| Exchange Traded Concepts, LLC | 66,897 | $4.50M | 0.04% | +21,017+45.8% | Added |
| Xponance, Inc. | 67,203 | $4.52M | 0.03% | +3,897+6.2% | Added |
| Robeco Institutional Asset Management B.V. | 68,155 | $4.58M | 0.01% | −6,513−8.7% | Reduced |
| Utah Retirement Systems | 68,915 | $4.63M | 0.04% | 00.0% | Unchanged |
| Dash Acquisitions Inc. | 88,769 | $4.65M | 0.97% | +7,330+9.0% | Added |
| Macquarie Group Ltd | 69,698 | $4.69M | 0.02% | −4,197,458−98.4% | Reduced |
| Hantz Financial Services, Inc. | 70,445 | $4.74M | 0.07% | −17,794−20.2% | Reduced |
| Louisbourg Investments Inc. | 90,322 | $4.74M | 0.95% | +74,637+475.8% | Added |
| Blue Zone Wealth Advisors, LLC | 71,556 | $4.81M | 0.92% | +1,226+1.7% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 71,590 | $4.81M | 0.04% | +1,227+1.7% | Added |
| Los Angeles Capital Management LLC | 69,363 | $4.83M | 0.02% | −12,351−15.1% | Reduced |
| Woodline Partners LP | 72,309 | $4.86M | 0.02% | +16,319+29.1% | Added |
| HB Wealth Management, LLC | 73,804 | $4.96M | 0.03% | −3,095−4.0% | Reduced |
| USS Investment Management Ltd | 74,622 | $5.02M | 0.02% | +952+1.3% | Added |
| British Columbia Investment Management Corp | 75,138 | $5.05M | 0.03% | +14,505+23.9% | Added |
| The PNC Financial Services Group, Inc. | 76,253 | $5.13M | 0.00% | −20,720−21.4% | Reduced |
| American Century Companies Inc | 76,595 | $5.15M | 0.00% | −474,928−86.1% | Reduced |