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, Q2 2021
Institutional positions in Costar Group, Inc. as of Jun 30, 2021. 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
- 607
- +19 vs. Q1 2021
- Shares held
- 375.3M
- +1.70M (+0.5%) vs. Q1 2021Converted for a 10-for-1 split
- Total value
- $31.1B
- +$378.3M (+1.2%) vs. Q1 2021
- New holders
- 86
- 229 more added
- Sold out
- 67
- 172 more reduced
5 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2021: 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, Q2 2021
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Janus Henderson Group PLC | 11,717,971 | $970.5M | 0.42% | −3,314,729−22.1% | ReducedConverted for a 10-for-1 split |
| Baillie Gifford & Co | 12,000,170 | $993.9M | 0.48% | +525,820+4.6% | AddedConverted for a 10-for-1 split |
| Principal Financial Group Inc | 15,169,117 | $1.26B | 0.81% | +5,626,637+59.0% | AddedConverted for a 10-for-1 split |
| Bamco Inc | 18,793,260 | $1.56B | 3.57% | −609,330−3.1% | ReducedConverted for a 10-for-1 split |
| BlackRock Inc. | 25,891,949 | $2.14B | 0.06% | −4,631,971−15.2% | ReducedConverted for a 10-for-1 split |
| Vanguard Group Inc | 34,639,833 | $2.87B | 0.07% | 00.0% | UnchangedConverted for a 10-for-1 split |
| Price T Rowe Associates Inc | 43,681,083 | $3.62B | 0.34% | +1,306,713+3.1% | AddedConverted for a 10-for-1 split |
| Marshall Wace North America L.P. | 0 | $0 | 0.00% | −374,860−100.0% | Sold outConverted for a 10-for-1 split |
| TIG Advisors, LLC | 0 | $0 | 0.00% | −329,790−100.0% | Sold outConverted for a 10-for-1 split |
| Assenagon Asset Management S.A. | 0 | $0 | 0.00% | −289,290−100.0% | Sold outConverted for a 10-for-1 split |
| Islet Management, LP | 0 | $0 | 0.00% | −250,000−100.0% | Sold outConverted for a 10-for-1 split |
| AMP Capital Investors Ltd | 0 | $0 | 0.00% | −124,840−100.0% | Sold outConverted for a 10-for-1 split |
| PEAK6 Investments LLC | 0 | $0 | 0.00% | −87,000−100.0% | Sold outConverted for a 10-for-1 split |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −78,020−100.0% | Sold outConverted for a 10-for-1 split |
| XXEC, Inc. | 0 | $0 | 0.00% | −69,690−100.0% | Sold outConverted for a 10-for-1 split |
| Oregon Public Employees Retirement Fund | 0 | $0 | 0.00% | −49,000−100.0% | Sold outConverted for a 10-for-1 split |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −30,070−100.0% | Sold outConverted for a 10-for-1 split |
| AXS Investments LLC | 0 | $0 | 0.00% | −24,080−100.0% | Sold outConverted for a 10-for-1 split |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −22,550−100.0% | Sold outConverted for a 10-for-1 split |
| Parkwood LLC | 0 | $0 | 0.00% | −17,930−100.0% | Sold outConverted for a 10-for-1 split |
| OPSEU Pension Plan Trust Fund | 0 | $0 | 0.00% | −16,960−100.0% | Sold outConverted for a 10-for-1 split |
| Paragon Advisors, LLC | 0 | $0 | 0.00% | −16,020−100.0% | Sold outConverted for a 10-for-1 split |
| Polianta Ltd | 0 | $0 | 0.00% | −15,000−100.0% | Sold outConverted for a 10-for-1 split |
| Aptus Capital Advisors, LLC | 0 | $0 | 0.00% | −13,660−100.0% | Sold outConverted for a 10-for-1 split |
| XTX Topco Ltd | 0 | $0 | 0.00% | −9,760−100.0% | Sold outConverted for a 10-for-1 split |
| Sowell Financial Services LLC | 0 | $0 | 0.00% | −9,610−100.0% | Sold outConverted for a 10-for-1 split |
| GWM Advisors LLC | 0 | $0 | 0.00% | −8,200−100.0% | Sold outConverted for a 10-for-1 split |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −8,000−100.0% | Sold outConverted for a 10-for-1 split |
| American Assets Investment Management, LLC | 0 | $0 | 0.00% | −7,500−100.0% | Sold outConverted for a 10-for-1 split |
| Frisch Financial Group, Inc. | 0 | $0 | 0.00% | −7,050−100.0% | Sold outConverted for a 10-for-1 split |
| Zevenbergen Capital Investments LLC | 0 | $0 | 0.00% | −6,730−100.0% | Sold outConverted for a 10-for-1 split |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −6,000−100.0% | Sold outConverted for a 10-for-1 split |
| National Asset Management, Inc. | 0 | $0 | 0.00% | −5,830−100.0% | Sold outConverted for a 10-for-1 split |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −5,810−100.0% | Sold outConverted for a 10-for-1 split |
| Bridgewater Associates, LP | 0 | $0 | 0.00% | −5,290−100.0% | Sold outConverted for a 10-for-1 split |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −5,250−100.0% | Sold outConverted for a 10-for-1 split |
| Parametrica Management Ltd | 0 | $0 | 0.00% | −5,280−100.0% | Sold outConverted for a 10-for-1 split |
| Grantham, Mayo, Van Otterloo & Co. LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold outConverted for a 10-for-1 split |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −4,520−100.0% | Sold outConverted for a 10-for-1 split |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −4,170−100.0% | Sold outConverted for a 10-for-1 split |
| GYL Financial Synergies, LLC | 0 | $0 | 0.00% | −3,890−100.0% | Sold outConverted for a 10-for-1 split |
| Exencial Wealth Advisors, LLC | 0 | $0 | 0.00% | −3,690−100.0% | Sold outConverted for a 10-for-1 split |
| Maven Securities LTD | 0 | $0 | 0.00% | −3,640−100.0% | Sold outConverted for a 10-for-1 split |
| RMB Capital Management, LLC | 0 | $0 | 0.00% | −3,530−100.0% | Sold outConverted for a 10-for-1 split |
| Kovack Advisors, Inc. | 0 | $0 | 0.00% | −3,530−100.0% | Sold outConverted for a 10-for-1 split |
| CIBC World Markets Inc. | 0 | $0 | 0.00% | −3,460−100.0% | Sold outConverted for a 10-for-1 split |
| JS Capital Management LLC | 0 | $0 | 0.00% | −3,000−100.0% | Sold outConverted for a 10-for-1 split |
| NorthRock Partners, LLC | 0 | $0 | 0.00% | −3,000−100.0% | Sold outConverted for a 10-for-1 split |
| Crossmark Global Holdings, Inc. | 0 | $0 | 0.00% | −2,870−100.0% | Sold outConverted for a 10-for-1 split |
| Associated Banc-Corp | 0 | $0 | 0.00% | −3,960−100.0% | Sold outConverted for a 10-for-1 split |
| Security National Bank of So Dak | 0 | $0 | 0.00% | −2,700−100.0% | Sold outConverted for a 10-for-1 split |
| Venturi Wealth Management, LLC | 0 | $0 | 0.00% | −2,670−100.0% | Sold outConverted for a 10-for-1 split |
| Avantax Advisory Services, Inc. | 0 | $0 | 0.00% | −2,610−100.0% | Sold outConverted for a 10-for-1 split |
| Allred Capital Management, LLC | 0 | $0 | 0.00% | −1,900−100.0% | Sold outConverted for a 10-for-1 split |
| Manchester Financial Inc | 0 | $0 | 0.00% | −1,570−100.0% | Sold outConverted for a 10-for-1 split |
| Botty Investors LLC | 0 | $0 | 0.00% | −1,220−100.0% | Sold outConverted for a 10-for-1 split |
| Montag A & Associates Inc | 0 | $0 | 0.00% | −1,000−100.0% | Sold outConverted for a 10-for-1 split |
| Grace Capital | 0 | $0 | 0.00% | −1,000−100.0% | Sold outConverted for a 10-for-1 split |
| Ameritas Investment Company, LLC | 0 | $0 | 0.00% | −770−100.0% | Sold outConverted for a 10-for-1 split |
| Geneos Wealth Management Inc. | 0 | $0 | 0.00% | −530−100.0% | Sold outConverted for a 10-for-1 split |
| Ellevest, Inc. | 0 | $0 | 0.00% | −510−100.0% | Sold outConverted for a 10-for-1 split |
| Brand Asset Management Group, Inc. | 0 | $0 | 0.00% | −380−100.0% | Sold outConverted for a 10-for-1 split |
| Meridian Wealth Partners, LLC | 0 | $0 | 0.00% | −240−100.0% | Sold outConverted for a 10-for-1 split |
| International Assets Investment Management, LLC | 0 | $0 | 0.00% | −120−100.0% | Sold outConverted for a 10-for-1 split |
| Hanson & Doremus Investment Management | 0 | $0 | 0.00% | −70−100.0% | Sold outConverted for a 10-for-1 split |
| Wealthcare Capital Management LLC | 0 | $0 | 0.00% | −50−100.0% | Sold outConverted for a 10-for-1 split |
| JJJ Advisors Inc. | 0 | $0 | 0.00% | −50−100.0% | Sold outConverted for a 10-for-1 split |
| Valeo Financial Advisors, LLC | 0 | $0 | 0.00% | −40−100.0% | Sold outConverted for a 10-for-1 split |
| Jones Financial Companies LLLP | 0 | $0 | 0.00% | −20−100.0% | Sold outConverted for a 10-for-1 split |
| Trust Co of Vermont | 0 | $0 | 0.00% | −20−100.0% | Sold outConverted for a 10-for-1 split |
| Wealthcare Advisory Partners LLC | 0 | $0 | 0.00% | −30−100.0% | Sold outConverted for a 10-for-1 split |
| Aua Capital Management, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold outConverted for a 10-for-1 split |
| Benjamin F. Edwards & Company, Inc. | 0 | $0 | 0.00% | −10−100.0% | Sold outConverted for a 10-for-1 split |
| Harel Insurance Investments & Financial Services Ltd. | 0 | $0 | 0.00% | −3,380−100.0% | Sold outConverted for a 10-for-1 split |
| Waddell & Reed Financial Inc | – | – | – | – | Not filed |
| Amundi Asset Management US, Inc. | – | – | – | – | Not filed |
| BBVA USA Bancshares, Inc. | – | – | – | – | Not filed |
| Bokf, NA | – | – | – | – | Not filed |
| Tompkins Financial Corp | – | – | – | – | Not filed |