COSTAR GROUP, INC. (CSGP) has 173 open-market insider trades by 23 insiders since 2006. Over the last six months insiders net bought $4.8M. The most active filer is Andrew C. Florance, CEO & Founder.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| Andrew C. Florance | CEOFounder | — | 32 | $438.5M | 2026-08-04 |
| Michael R. Klein | Dir | — | 11 | $91.8M | 2024-12-10 |
| Scott T. Wheeler | CFO | — | 12 | $86.2M | 2024-04-26 |
| Francis Carchedi | VP | — | 15 | $46.9M | 2018-09-28 |
| Matthew Linnington | VP | — | 8 | $37.3M | 2020-08-12 |
| Frederick G. Saint | Pres | — | 7 | $25.4M | 2026-08-01 |
| Frank Simuro | CTO | — | 2 | $21.5M | 2026-03-15 |
| Lisa Ruggles | VP | — | 5 | $18.0M | 2026-03-15 |
| Brian J. Radecki | CFO | — | 10 | $17.6M | 2015-03-13 |
| John L. Stanfill | Sr. VP-SalesCustomer Service | — | 7 | $12.1M | 2014-03-11 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| Cynthia Cammett Cann | CAO | Sell | $147K | 2026-08-07 |
| John W. Hill | Director | Sell | $106K | 2026-08-05 |
| Andrew C. Florance | CEO & Founder | Buy | $2.5M | 2026-08-04 |
| Andrew C. Florance | CEO & President | Buy | $2.5M | 2026-05-01 |
| Louise S. Sams | Director | Buy | $48K | 2026-03-06 |
| Rachel C. Glaser | Director | Buy | $45K |
Companies that share insiders with CSGP, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| 2026-03-02 |
| Frederick G. Saint | President & Marketplaces | Buy | $907K | 2026-03-02 |
| Andrew C. Florance | President | Buy | $2.5M | 2026-02-27 |
| John W. Hill | Director | Sell | $309K | 2025-11-13 |
| Cynthia Cammett Cann | CAO | Sell | $253K | 2025-11-13 |
| Frederick G. Saint | President | Sell | $2.3M | 2025-08-28 |
| Frederick G. Saint | President | Sell | $2.3M | 2025-07-28 |
| Cynthia Cammett Cann | CAO | Sell | $378K | 2025-07-28 |
| Frederick G. Saint | President | Sell | $4.1M | 2025-06-11 |
| John W. Hill | Director | Sell | $420K | 2024-12-10 |