COSTAR GROUP, INC. (CSGP) has 14 SEC Form 4 insider filings on record in the last 90 days. That includes 1 insider purchase totalling $2.5M, and 2 sales totalling $253K. Most recent filing: Aug. 10, 2026.
| Date | Insider | Value | Shares | Stake | Pre-planned | Links |
|---|---|---|---|---|---|---|
| Aug. 10, 2026 filed Aug. 7, 2026 | Cann Cynthia Cammett Chief Accounting Officer | −$147,375 | 4,788 | −20% | No | |
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| Aug. 10, 2026 filed Aug. 5, 2026 | Hill John W Director | −$105,735 | 3,500 | −13% | No | |
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| Aug. 5, 2026 filed Aug. 4, 2026 | FLORANCE ANDREW C Founder and CEO | +$2,489,837 | 83,300 | +5% | No | |
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| Aug. 4, 2026 filed July 31, 2026 | Cann Cynthia Cammett Chief Accounting Officer | $30,975 | 27,155 | −4% | No | |
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| Aug. 4, 2026 filed Aug. 1, 2026 | SAINT FREDERICK G. President, Marketplaces | $41,299 | 1,436 | −1% | No | |
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Showing the 5 most recent of 14 filings in the last 90 days.
Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
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