CoStar Group Inc (CSGP) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for CSGP. 13F holdings as of 2026-06-30.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|
| Vanguard | 68,808,700 | $1.9B | DECREASED |
| BlackRock | 33,813,969 | $958M | INCREASED |
| Bamco Inc | 21,626,763 | $612M | INCREASED |
| Capital Group | 20,836,749 | $590M | INCREASED |
| State Street | 18,410,876 | $521M | DECREASED |
Recent Insider Trades
| Insider | Type | Shares | Value | Date |
|---|
| Cynthia Cammett Cann (Chief Accounting Officer) | SELL | 4,788 | $147K | 2026-08-07 |
| John W Hill (Director) | SELL | 3,500 | $106K | 2026-08-05 |
| Andrew C Florance (Founder and CEO) | BUY | 83,300 | $2M | 2026-08-04 |
| Frederick G. Saint (President, Marketplaces) | TAX-W | 1,436 | $41K | 2026-08-01 |
| Cynthia Cammett Cann (Chief Accounting Officer) | AWARD | 26,078 | | 2026-07-31 |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|
| Gilbert Cisneros (Democrat) | PURCHASE | $1,001 - $15,000 | 2026-08-19 |
Full institutional holdings, insider history, and congressional trades for CoStar Group Inc on SentiSense.