CoStar Group (CSGP) — insider trading
Real Estate · NASDAQ
CoStar Group (CSGP) has 19 reported SEC Form 4 insider transactions in our data, including 3 open-market purchases and 2 open-market sales among the most recent 19 (latest 2026-08-07).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-07 | Cann Cynthia Cammett | Officer (Chief Accounting Officer) | Open-market sale | 4,788 | $30.78 | $147.4K | Form 4 |
| 2026-08-05 | Hill John W | Director | Open-market sale | 3,500 | $30.21 | $105.7K | Form 4 |
| 2026-08-04 | FLORANCE ANDREW C | Director, Officer (Founder and CEO) | Open-market purchase | 83,300 | $29.89 | $2.49M | Form 4 |
| 2026-08-01 | SAINT FREDERICK G. | Officer (President, Marketplaces) | Shares withheld for taxes / exercise cost | 1,436 | $28.76 | $41.3K | Form 4 |
| 2026-08-01 | Cann Cynthia Cammett | Officer (Chief Accounting Officer) | Shares withheld for taxes / exercise cost | 1,077 | $28.76 | $31.0K | Form 4 |
| 2026-07-31 | Cann Cynthia Cammett | Officer (Chief Accounting Officer) | Grant / award / vesting (derivative) | 26,078 | — | $0 | Form 4 |
| 2026-07-31 | Rossmann Robin Jack | Officer (Chief Financial Officer) | Grant / award / vesting (derivative) | 34,771 | — | $0 | Form 4 |
| 2026-07-01 | LOWN CHRISTIAN M. | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 5,597 | $29.36 | $164.3K | Form 4 |
| 2026-06-23 | McCarthy Christine M | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | Sams Louise S | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | Musslewhite Robert W | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | Brunner Angelique G. | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | Hill John W | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | BERISFORD JOHN L | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-23 | Glaser Rachel C | Director | Grant / award / vesting | 8,262 | — | $0 | Form 4 |
| 2026-06-15 | Cann Cynthia Cammett | Officer (Chief Accounting Officer) | Shares withheld for taxes / exercise cost | 461 | $32.04 | $14.8K | Form 4 |
| 2026-05-01 | FLORANCE ANDREW C | Director, Officer (President and CEO) | Open-market purchase | 3,100 | $35.82 | $111.0K | Form 4 |
| 2026-05-01 | FLORANCE ANDREW C | Director, Officer (President and CEO) | Open-market purchase | 68,330 | $35.17 | $2.40M | Form 4 |
| 2026-03-15 | Boxer Gene | Officer (General Counsel and Secretary) | Shares withheld for taxes / exercise cost | 482 | $43.63 | $21.0K | Form 4/A |
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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: CoStar Group (CSGP).
Last updated 2026-08-07 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.