CSGP insider trading — Costar Group, Inc.
Over the last 90 days, insiders at Costar Group, Inc. (CSGP) made 1 open-market purchase worth $2.49M and 2 open-market sales worth $253K, making them net buyers by $2.24M. The largest purchase was by Florance Andrew C (Founder and CEO), who bought 83,300 shares for $2.49M on Aug 4, 2026. The largest sale was by Cann Cynthia Cammett (Chief Accounting Officer), who sold 4,788 shares for $147K on Aug 7, 2026.
Updated Oct 16, 2026.
Recent CSGP insider transactions
Every Form 4 filed by Costar Group, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 7, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | S · Sale | Direct | 4,788 | $30.78 | $147K | Form 4 |
| Aug 5, 2026 | Hill John W | Director | S · Sale | Direct | 3,500 | $30.21 | $106K | Form 4 |
| Aug 4, 2026 | Florance Andrew C | Founder and CEO | P · Purchase | Direct | 83,300 | $29.89 | $2.49M | Form 4 |
| Aug 1, 2026 | Saint Frederick G. | President, Marketplaces | F · Tax withholding | Direct | 1,436 | $28.76 | $41K | Form 4 |
| Aug 1, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | F · Tax withholding | Direct | 1,077 | $28.76 | $31K | Form 4 |
CSGP insider trading FAQ
Are insiders buying CSGP stock?
Yes. In the last 90 days, Costar Group, Inc. insiders made 1 open-market purchase totaling $2.49M, and 2 open-market sales totaling $253K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading CSGP?
Recent buyers: Florance Andrew C. Recent sellers: Cann Cynthia Cammett, Hill John W.
Where does CSGP insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
More stocks with insider activity
Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.