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 |
|---|---|---|---|---|---|
| First Foundation Advisors | 18,296 | $738.1K | 0.03% | −2,239−10.9% | Reduced |
| Paragon Capital Management Inc | 18,360 | $740.6K | 0.63% | +18,360 | New |
| Everence Capital Management Inc | 18,734 | $756.0K | 0.05% | +18,734 | New |
| Ameritas Investment Partners, Inc. | 19,030 | $767.7K | 0.02% | −154−0.8% | Reduced |
| Capital International Inc | 19,323 | $779.5K | 0.01% | +8,474+78.1% | Added |
| Boothbay Fund Management, LLC | 19,473 | $785.5K | 0.02% | +13,934+251.6% | Added |
| New Mexico Educational Retirement Board | 19,600 | $791.0K | 0.02% | 00.0% | Unchanged |
| Mattern Capital Management, LLC | 19,745 | $796.5K | 0.10% | +3,282+19.9% | Added |
| Tokio Marine Asset Management Co Ltd | 19,770 | $797.5K | 0.03% | +3,559+22.0% | Added |
| EntryPoint Capital, LLC | 19,788 | $798.2K | 0.23% | +14,349+263.8% | Added |
| AE Wealth Management LLC | 19,831 | $800.0K | 0.00% | −4,681−19.1% | Reduced |
| Parallel Advisors, LLC | 20,346 | $820.8K | 0.01% | −443−2.1% | Reduced |
| Commerce Bank | 20,452 | $825.0K | 0.00% | +1,583+8.4% | Added |
| O'Shaughnessy Asset Management, LLC | 20,538 | $828.5K | 0.00% | −19,264−48.4% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 20,604 | $831.2K | 0.00% | −4,454−17.8% | Reduced |
| M&T Bank Corp | 20,701 | $834.9K | 0.00% | +2,779+15.5% | Added |
| Wealthfront Advisers LLC | 20,936 | $844.6K | 0.00% | −5,344−20.3% | Reduced |
| Institute for Wealth Management, LLC. | 21,141 | $852.8K | 0.09% | +5,485+35.0% | Added |
| Park Avenue Securities LLC | 21,163 | $854.0K | 0.01% | −2,016−8.7% | Reduced |
| Maryland State Retirement & Pension System | 21,232 | $856.5K | 0.02% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 21,360 | $861.7K | 0.03% | +21,360 | New |
| Candriam Luxembourg S.C.A. | 21,512 | $867.8K | 0.00% | +2,773+14.8% | Added |
| Omers Administration Corp | 21,618 | $872.1K | 0.01% | +4,531+26.5% | Added |
| Intellectus Partners, LLC | 21,796 | $879.3K | 0.18% | +15,437+242.8% | Added |
| ASR Vermogensbeheer N.V. | 21,936 | $884.8K | 0.01% | +360+1.7% | Added |
| DoubleLine ETF Adviser LP | 22,085 | $890.9K | 0.34% | −5,390−19.6% | Reduced |
| Aurora Investment Managers, LLC. | 22,187 | $895.0K | 0.66% | −115−0.5% | Reduced |
| Third View Private Wealth, LLC | 22,717 | $916.4K | 0.13% | +881+4.0% | Added |
| Keybank National Association | 23,180 | $935.1K | 0.00% | +6,789+41.4% | Added |
| Crossmark Global Holdings, Inc. | 23,429 | $945.1K | 0.01% | −170−0.7% | Reduced |
| Alps Advisors Inc | 23,646 | $953.9K | 0.00% | +691+3.0% | Added |
| Summit Trail Advisors, LLC | 23,785 | $959.5K | 0.01% | +9,330+64.5% | Added |
| Hartford Investment Management Co | 24,283 | $979.6K | 0.03% | −289−1.2% | Reduced |
| ExodusPoint Capital Management, LP | 24,483 | $987.6K | 0.01% | −114,813−82.4% | Reduced |
| Toroso Investments, LLC | 24,754 | $998.6K | 0.00% | +5,663+29.7% | Added |
| Gibbs Wealth Management | 25,414 | $1.03M | 0.14% | +15,219+149.3% | Added |
| Mizuho Securities USA LLC | 25,622 | $1.03M | 0.02% | −5,238−17.0% | Reduced |
| PEAK6 LLC | 26,037 | $1.05M | 0.03% | +26,037 | New |
| Prudential PLC | 26,124 | $1.05M | 0.01% | 00.0% | Unchanged |
| Janney Montgomery Scott LLC | 26,485 | $1.07M | 0.00% | −12,636−32.3% | Reduced |
| Harbor Advisors LLC | 26,560 | $1.07M | 0.15% | 00.0% | Unchanged |
| Ethic Inc. | 26,634 | $1.07M | 0.02% | +1,955+7.9% | Added |
| Three Seasons Wealth, LLC | 26,644 | $1.07M | 0.41% | +18,858+242.2% | Added |
| Gsa Capital Partners LLP | 26,950 | $1.09M | 0.07% | +26,950 | New |
| Waterway Wealth Management, LLC | 27,670 | $1.12M | 0.25% | +16,246+142.2% | Added |
| DRW Securities, LLC | 27,773 | $1.12M | 0.06% | +22,101+389.7% | Added |
| Allianz Asset Management GmbH | 28,001 | $1.13M | 0.00% | +6,226+28.6% | Added |
| Wiley Bros.-Aintree Capital, LLC | 28,454 | $1.15M | 0.01% | +5,527+24.1% | Added |
| Malaga Cove Capital, LLC | 29,440 | $1.19M | 0.43% | −1,336−4.3% | Reduced |
| JustInvest LLC | 29,729 | $1.20M | 0.01% | +1,870+6.7% | Added |
| Investment Management Corp of Ontario | 30,369 | $1.23M | 0.02% | −8,474−21.8% | Reduced |
| Axq Capital, LP | 30,465 | $1.23M | 0.16% | +30,465 | New |
| Advisor Group Holdings, Inc. | 30,503 | $1.23M | 0.00% | +17,394+132.7% | Added |
| Centaurus Financial, Inc. | 30,534 | $1.23M | 0.06% | −1,186−3.7% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 30,657 | $1.24M | 0.01% | +8,461+38.1% | Added |
| SlateStone Wealth, LLC | 30,765 | $1.24M | 0.10% | −1,461−4.5% | Reduced |
| QRG Capital Management, Inc. | 30,939 | $1.25M | 0.01% | +4,987+19.2% | Added |
| Harvest Fund Management Co., Ltd | 31,007 | $1.25M | 0.05% | −637−2.0% | Reduced |
| D.A. Davidson & Co. | 31,228 | $1.26M | 0.01% | −2,354−7.0% | Reduced |
| Barbara Oil Co. | 32,000 | $1.29M | 0.50% | 00.0% | Unchanged |
| Skylands Capital, LLC | 32,050 | $1.29M | 0.17% | +15,000+88.0% | Added |
| Schroder Investment Management Group | 32,137 | $1.30M | 0.00% | −1,046−3.2% | Reduced |
| Principal Securities, Inc. | 32,445 | $1.31M | 0.02% | +4,171+14.8% | Added |
| Profund Advisors LLC | 32,545 | $1.31M | 0.05% | −8,126−20.0% | Reduced |
| Gulf International Bank (UK) Ltd | 32,851 | $1.32M | 0.03% | +11,069+50.8% | Added |
| Papp L Roy & Associates | 32,889 | $1.33M | 0.15% | −365−1.1% | Reduced |
| EagleClaw Capital Managment, LLC | 33,750 | $1.36M | 0.19% | −400−1.2% | Reduced |
| Formula Growth Ltd | 34,000 | $1.37M | 0.62% | 00.0% | Unchanged |
| Personal Cfo Solutions, LLC | 34,585 | $1.40M | 0.20% | +23,614+215.2% | Added |
| Liontrust Investment Partners LLP | 35,058 | $1.41M | 0.02% | +6,734+23.8% | Added |
| Scotia Capital Inc. | 35,065 | $1.41M | 0.01% | +1,709+5.1% | Added |
| Qsemble Capital Management, LP | 35,343 | $1.43M | 0.11% | +35,343 | New |
| Headlands Technologies LLC | 35,428 | $1.43M | 0.16% | +35,428 | New |
| Storebrand Asset Management AS | 36,078 | $1.46M | 0.00% | −41,654−53.6% | Reduced |
| Thrivent Financial for Lutherans | 36,116 | $1.46M | 0.00% | −85,244−70.2% | Reduced |
| Fideuram Asset Management (Ireland) dac | 23,508 | $1.48M | 0.19% | +22,563+2,387.6% | Added |
| Cambridge Investment Research Advisors, Inc. | 36,831 | $1.49M | 0.00% | −1,020−2.7% | Reduced |
| Badgley Phelps Wealth Managers, LLC | 37,094 | $1.50M | 0.03% | −129,159−77.7% | Reduced |
| Sanctuary Advisors, LLC | 37,300 | $1.50M | 0.01% | +13,029+53.7% | Added |
| Portside Wealth Group, LLC | 37,528 | $1.51M | 0.21% | +18,380+96.0% | Added |
| Red Spruce Capital, LLC | 38,035 | $1.53M | 0.63% | +16,137+73.7% | Added |
| Wealth Enhancement Advisory Services, LLC | 38,579 | $1.54M | 0.00% | +17,062+79.3% | Added |
| Pathstone Holdings, LLC | 38,553 | $1.56M | 0.01% | +14,019+57.1% | Added |
| Entropy Technologies, LP | 38,653 | $1.56M | 0.07% | +25,532+194.6% | Added |
| Macquarie Group Ltd | 38,996 | $1.57M | 0.01% | −30,702−44.1% | Reduced |
| Norden Group LLC | 39,418 | $1.59M | 0.15% | +29,011+278.8% | Added |
| Atom Investors LP | 40,398 | $1.63M | 0.12% | +36,439+920.4% | Added |
| Norinchukin Bank, The | 40,664 | $1.64M | 0.02% | +1,344+3.4% | Added |
| Arrowstreet Capital, Limited Partnership | 40,911 | $1.65M | 0.00% | +40,911 | New |
| Oakum Bay Capital LLC | 40,965 | $1.65M | 0.89% | +35,465+644.8% | Added |
| Empowered Funds, LLC | 40,987 | $1.65M | 0.01% | +31,446+329.6% | Added |
| Regions Financial Corp | 41,516 | $1.67M | 0.01% | −14,413−25.8% | Reduced |
| Knollwood Investment Advisory, LLC | 41,863 | $1.69M | 0.17% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 41,886 | $1.69M | 0.02% | 00.0% | Unchanged |
| Eurizon Capital SGR S.p.A. | 42,037 | $1.70M | 0.01% | −22,239−34.6% | Reduced |
| Nisa Investment Advisors, LLC | 42,624 | $1.72M | 0.01% | +9,162+27.4% | Added |
| Stephens Inc | 42,648 | $1.72M | 0.02% | +13,732+47.5% | Added |
| Yousif Capital Management, LLC | 42,682 | $1.72M | 0.02% | −726−1.7% | Reduced |
| OP Asset Management Ltd | 43,384 | $1.75M | 0.02% | −2,898−6.3% | Reduced |
| New Age Alpha Advisors, LLC | 43,662 | $1.76M | 0.08% | −1,515−3.4% | Reduced |