COSTAR GROUP INC (CSGP) insider trading activity (SEC Form 4). Over the trailing 90 days, CSGP insiders filed 0 purchases totalling $0 and 1 sales totalling $92K — net SELLING of $92K. Most recent filing: Nov 13, 2026. Insider transactions are a Pro-tier alertable signal in the live Top Tier Newswire terminal — Form 4 filings reach the wire within minutes of acceptance by the SEC. Data shown publicly here is delayed 4 hours.
| Filed | Insider | Role | Type | Shares | Price | Value | |
|---|---|---|---|---|---|---|---|
| Nov 13, 2026 | Hill John W | Dir | S Sale | — | $30.18 | $92K | filing |
| Aug 10, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | S Sale | — | $30.78 | $147K | filing |
| Aug 10, 2026 | Hill John W | Dir | S Sale | — | $30.21 | $106K | filing |
| Aug 5, 2026 | Florance Andrew C | Founder, CEO | P Purchase | — | $29.89 | $2.5M | filing |