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.
Q2 2026 vs. Q1 2026
How the institutions holding Costar Group, Inc. changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Of which not filed for Q2 2026 | Q2 2026 | Change |
|---|---|---|---|---|
| Holders | 797 | 9 | 760 | −28 |
| Shares | 415.9M | 7.85M | 414.0M | +5.90M (+1.4%) |
| Value | $16.8B | $316.5M | $11.7B | −$4.74B (−28.8%) |
9 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (115)
Institutions that held Costar Group, Inc. at the end of Q2 2026 but not at the end of Q1 2026.
Showing the largest 100 of 115 by value.
Sold out (143)
Institutions that held Costar Group, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.
Showing the largest 100 of 143 by value.
Not filed for Q2 2026 yet (9)
Institutions that held Costar Group, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| Janus Henderson Group PLC | 7,724,152 | $311.6M |
| CWM, LLC | 49,740 | $2.01M |
| Oakum Bay Capital LLC | 40,965 | $1.65M |
| Gibbs Wealth Management | 25,414 | $1.03M |
| Skopos Labs, Inc. | 6,128 | $247.2K |
| McIlrath & Eck, LLC | 258 | $10.4K |
| USA Financial Portformulas Corp | 143 | $5.77K |
| Red Tortoise LLC | 98 | $3.95K |
| Sunbelt Securities, Inc. | 4 | $161 |