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 |
|---|---|---|---|---|---|
| Stephens Inc | 42,648 | $1.72M | 0.02% | +13,732+47.5% | Added |
| Nisa Investment Advisors, LLC | 42,624 | $1.72M | 0.01% | +9,162+27.4% | Added |
| Eurizon Capital SGR S.p.A. | 42,037 | $1.70M | 0.01% | −22,239−34.6% | Reduced |
| State of Alaska, Department of Revenue | 41,886 | $1.69M | 0.02% | 00.0% | Unchanged |
| Knollwood Investment Advisory, LLC | 41,863 | $1.69M | 0.17% | 00.0% | Unchanged |
| Regions Financial Corp | 41,516 | $1.67M | 0.01% | −14,413−25.8% | Reduced |
| Empowered Funds, LLC | 40,987 | $1.65M | 0.01% | +31,446+329.6% | Added |
| Oakum Bay Capital LLC | 40,965 | $1.65M | 0.89% | +35,465+644.8% | Added |
| Arrowstreet Capital, Limited Partnership | 40,911 | $1.65M | 0.00% | +40,911 | New |
| Norinchukin Bank, The | 40,664 | $1.64M | 0.02% | +1,344+3.4% | Added |
| Atom Investors LP | 40,398 | $1.63M | 0.12% | +36,439+920.4% | Added |
| Norden Group LLC | 39,418 | $1.59M | 0.15% | +29,011+278.8% | Added |
| Macquarie Group Ltd | 38,996 | $1.57M | 0.01% | −30,702−44.1% | Reduced |
| Entropy Technologies, LP | 38,653 | $1.56M | 0.07% | +25,532+194.6% | Added |
| Pathstone Holdings, LLC | 38,553 | $1.56M | 0.01% | +14,019+57.1% | Added |
| Wealth Enhancement Advisory Services, LLC | 38,579 | $1.54M | 0.00% | +17,062+79.3% | Added |
| Red Spruce Capital, LLC | 38,035 | $1.53M | 0.63% | +16,137+73.7% | Added |
| Portside Wealth Group, LLC | 37,528 | $1.51M | 0.21% | +18,380+96.0% | Added |
| Sanctuary Advisors, LLC | 37,300 | $1.50M | 0.01% | +13,029+53.7% | Added |
| Badgley Phelps Wealth Managers, LLC | 37,094 | $1.50M | 0.03% | −129,159−77.7% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 36,831 | $1.49M | 0.00% | −1,020−2.7% | Reduced |
| Fideuram Asset Management (Ireland) dac | 23,508 | $1.48M | 0.19% | +22,563+2,387.6% | Added |
| Thrivent Financial for Lutherans | 36,116 | $1.46M | 0.00% | −85,244−70.2% | Reduced |
| Storebrand Asset Management AS | 36,078 | $1.46M | 0.00% | −41,654−53.6% | Reduced |
| Headlands Technologies LLC | 35,428 | $1.43M | 0.16% | +35,428 | New |
| Qsemble Capital Management, LP | 35,343 | $1.43M | 0.11% | +35,343 | New |
| Scotia Capital Inc. | 35,065 | $1.41M | 0.01% | +1,709+5.1% | Added |
| Liontrust Investment Partners LLP | 35,058 | $1.41M | 0.02% | +6,734+23.8% | Added |
| Personal Cfo Solutions, LLC | 34,585 | $1.40M | 0.20% | +23,614+215.2% | Added |
| Formula Growth Ltd | 34,000 | $1.37M | 0.62% | 00.0% | Unchanged |
| EagleClaw Capital Managment, LLC | 33,750 | $1.36M | 0.19% | −400−1.2% | Reduced |
| Papp L Roy & Associates | 32,889 | $1.33M | 0.15% | −365−1.1% | Reduced |
| Gulf International Bank (UK) Ltd | 32,851 | $1.32M | 0.03% | +11,069+50.8% | Added |
| Profund Advisors LLC | 32,545 | $1.31M | 0.05% | −8,126−20.0% | Reduced |
| Principal Securities, Inc. | 32,445 | $1.31M | 0.02% | +4,171+14.8% | Added |
| Schroder Investment Management Group | 32,137 | $1.30M | 0.00% | −1,046−3.2% | Reduced |
| Skylands Capital, LLC | 32,050 | $1.29M | 0.17% | +15,000+88.0% | Added |
| Barbara Oil Co. | 32,000 | $1.29M | 0.50% | 00.0% | Unchanged |
| D.A. Davidson & Co. | 31,228 | $1.26M | 0.01% | −2,354−7.0% | Reduced |
| Harvest Fund Management Co., Ltd | 31,007 | $1.25M | 0.05% | −637−2.0% | Reduced |
| QRG Capital Management, Inc. | 30,939 | $1.25M | 0.01% | +4,987+19.2% | Added |
| SlateStone Wealth, LLC | 30,765 | $1.24M | 0.10% | −1,461−4.5% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 30,657 | $1.24M | 0.01% | +8,461+38.1% | Added |
| Centaurus Financial, Inc. | 30,534 | $1.23M | 0.06% | −1,186−3.7% | Reduced |
| Advisor Group Holdings, Inc. | 30,503 | $1.23M | 0.00% | +17,394+132.7% | Added |
| Axq Capital, LP | 30,465 | $1.23M | 0.16% | +30,465 | New |
| Investment Management Corp of Ontario | 30,369 | $1.23M | 0.02% | −8,474−21.8% | Reduced |
| JustInvest LLC | 29,729 | $1.20M | 0.01% | +1,870+6.7% | Added |
| Malaga Cove Capital, LLC | 29,440 | $1.19M | 0.43% | −1,336−4.3% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 28,454 | $1.15M | 0.01% | +5,527+24.1% | Added |
| Allianz Asset Management GmbH | 28,001 | $1.13M | 0.00% | +6,226+28.6% | Added |
| DRW Securities, LLC | 27,773 | $1.12M | 0.06% | +22,101+389.7% | Added |
| Waterway Wealth Management, LLC | 27,670 | $1.12M | 0.25% | +16,246+142.2% | Added |
| Gsa Capital Partners LLP | 26,950 | $1.09M | 0.07% | +26,950 | New |
| Three Seasons Wealth, LLC | 26,644 | $1.07M | 0.41% | +18,858+242.2% | Added |
| Ethic Inc. | 26,634 | $1.07M | 0.02% | +1,955+7.9% | Added |
| Harbor Advisors LLC | 26,560 | $1.07M | 0.15% | 00.0% | Unchanged |
| Janney Montgomery Scott LLC | 26,485 | $1.07M | 0.00% | −12,636−32.3% | Reduced |
| Prudential PLC | 26,124 | $1.05M | 0.01% | 00.0% | Unchanged |
| PEAK6 LLC | 26,037 | $1.05M | 0.03% | +26,037 | New |
| Mizuho Securities USA LLC | 25,622 | $1.03M | 0.02% | −5,238−17.0% | Reduced |
| Gibbs Wealth Management | 25,414 | $1.03M | 0.14% | +15,219+149.3% | Added |
| Toroso Investments, LLC | 24,754 | $998.6K | 0.00% | +5,663+29.7% | Added |
| ExodusPoint Capital Management, LP | 24,483 | $987.6K | 0.01% | −114,813−82.4% | Reduced |
| Hartford Investment Management Co | 24,283 | $979.6K | 0.03% | −289−1.2% | Reduced |
| Summit Trail Advisors, LLC | 23,785 | $959.5K | 0.01% | +9,330+64.5% | Added |
| Alps Advisors Inc | 23,646 | $953.9K | 0.00% | +691+3.0% | Added |
| Crossmark Global Holdings, Inc. | 23,429 | $945.1K | 0.01% | −170−0.7% | Reduced |
| Keybank National Association | 23,180 | $935.1K | 0.00% | +6,789+41.4% | Added |
| Third View Private Wealth, LLC | 22,717 | $916.4K | 0.13% | +881+4.0% | Added |
| Aurora Investment Managers, LLC. | 22,187 | $895.0K | 0.66% | −115−0.5% | Reduced |
| DoubleLine ETF Adviser LP | 22,085 | $890.9K | 0.34% | −5,390−19.6% | Reduced |
| ASR Vermogensbeheer N.V. | 21,936 | $884.8K | 0.01% | +360+1.7% | Added |
| Intellectus Partners, LLC | 21,796 | $879.3K | 0.18% | +15,437+242.8% | Added |
| Omers Administration Corp | 21,618 | $872.1K | 0.01% | +4,531+26.5% | Added |
| Candriam Luxembourg S.C.A. | 21,512 | $867.8K | 0.00% | +2,773+14.8% | Added |
| Graham Capital Management, L.P. | 21,360 | $861.7K | 0.03% | +21,360 | New |
| Maryland State Retirement & Pension System | 21,232 | $856.5K | 0.02% | 00.0% | Unchanged |
| Park Avenue Securities LLC | 21,163 | $854.0K | 0.01% | −2,016−8.7% | Reduced |
| Institute for Wealth Management, LLC. | 21,141 | $852.8K | 0.09% | +5,485+35.0% | Added |
| Wealthfront Advisers LLC | 20,936 | $844.6K | 0.00% | −5,344−20.3% | Reduced |
| M&T Bank Corp | 20,701 | $834.9K | 0.00% | +2,779+15.5% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 20,604 | $831.2K | 0.00% | −4,454−17.8% | Reduced |
| O'Shaughnessy Asset Management, LLC | 20,538 | $828.5K | 0.00% | −19,264−48.4% | Reduced |
| Commerce Bank | 20,452 | $825.0K | 0.00% | +1,583+8.4% | Added |
| Parallel Advisors, LLC | 20,346 | $820.8K | 0.01% | −443−2.1% | Reduced |
| AE Wealth Management LLC | 19,831 | $800.0K | 0.00% | −4,681−19.1% | Reduced |
| EntryPoint Capital, LLC | 19,788 | $798.2K | 0.23% | +14,349+263.8% | Added |
| Tokio Marine Asset Management Co Ltd | 19,770 | $797.5K | 0.03% | +3,559+22.0% | Added |
| Mattern Capital Management, LLC | 19,745 | $796.5K | 0.10% | +3,282+19.9% | Added |
| New Mexico Educational Retirement Board | 19,600 | $791.0K | 0.02% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 19,473 | $785.5K | 0.02% | +13,934+251.6% | Added |
| Capital International Inc | 19,323 | $779.5K | 0.01% | +8,474+78.1% | Added |
| Ameritas Investment Partners, Inc. | 19,030 | $767.7K | 0.02% | −154−0.8% | Reduced |
| Everence Capital Management Inc | 18,734 | $756.0K | 0.05% | +18,734 | New |
| Paragon Capital Management Inc | 18,360 | $740.6K | 0.63% | +18,360 | New |
| First Foundation Advisors | 18,296 | $738.1K | 0.03% | −2,239−10.9% | Reduced |
| Guidance Capital, Inc | 21,014 | $733.4K | 0.16% | +5,987+39.8% | Added |
| Quotient Wealth Partners, LLC | 18,124 | $731.1K | 0.02% | −123−0.7% | Reduced |
| Allspring Global Investments Holdings, LLC | 18,300 | $725.2K | 0.00% | −164,579−90.0% | Reduced |