Costar Group, Inc.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
No open-market purchases or sales by Costar Group, Inc. insiders were filed in the last 90 days; 764 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 2026
Institutional positions in Costar Group, Inc. as of Jun 30, 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
Q3 2026 data is still coming in: 387 institutions have reported holding CSGP so far. See Q3 2026
- Institutional holders
- 764
- −29 vs. Q1 2026
- Shares held
- 414.0M
- +5.89M (+1.4%) vs. Q1 2026
- Total value
- $11.7B
- −$4.74B (−28.8%) vs. Q1 2026
- New holders
- 114
- 304 more added
- Sold out
- 143
- 270 more reduced
8 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | 764 | $11.7B |
| Q1 2026 | 801 | $16.8B |
| Q4 2025 | 851 | $28.4B |
| Q3 2025 | 909 | $34.9B |
| Q2 2025 | 876 | $34.2B |
| Q1 2025 | 861 | $33.9B |
| Q4 2024 | 808 | $28.9B |
| Q3 2024 | 775 | $30.0B |
| Q2 2024 | 768 | $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 2026
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Trust Co of Toledo NA | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| TopTier Wealth Management, LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Sound Income Strategies, LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Rialto Wealth Management, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Hollencrest Capital Management | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Scarborough Advisors, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Curio Wealth, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Janus Henderson Group PLC | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |
| Oakum Bay Capital LLC | – | – | – | – | Not filed |
| Skopos Labs, Inc. | – | – | – | – | Not filed |
| McIlrath & Eck, LLC | – | – | – | – | Not filed |
| USA Financial Portformulas Corp | – | – | – | – | Not filed |
| Red Tortoise LLC | – | – | – | – | Not filed |
| Sunbelt Securities, Inc. | – | – | – | – | Not filed |