CoStar Group, Inc.
CSGPLast close · Oct 16, 202632.31+0.31 (+0.97%)
Market cap$13.1B
Between Feb 27, 2026 and Oct 15, 2026, CoStar Group (CSGP) insiders filed 34 Form 4 transactions: 2 sales worth $253,109.6 in total and 4 open-market purchases worth $5.1M. The largest seller was Cann Cynthia Cammett, $147,374.6. 28 other filings were grants, exercises or gifts, which say nothing about buying or selling.
34
4
2
0
Form 4 transactions
| Date | Insider | Title | Code | Plan | Shares | Price | Value |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | Rossmann Robin Jack | Chief Financial Officer | F | 756 | 32.00 | $24,192 | |
| 2026-08-07 | Cann Cynthia Cammett | Chief Accounting Officer | S | 4,788 | 30.78 | $147,374.6 | |
| 2026-08-05 | Hill John W | Director | S | 3,500 | 30.21 | $105,735 | |
| 2026-08-04 | FLORANCE ANDREW C | Founder and CEO | P | 83,300 | 29.89 | $2.5M | |
| 2026-07-31 | Rossmann Robin Jack | Chief Financial Officer | A | 34,771 | 0.00 | $0 | |
| 2026-08-01 | Cann Cynthia Cammett | Chief Accounting Officer | F | 1,077 | 28.76 | $30,974.5 | |
| 2026-07-31 | Cann Cynthia Cammett | Chief Accounting Officer | A | 26,078 | 0.00 | $0 | |
| 2026-08-01 | SAINT FREDERICK G. | President, Marketplaces | F | 1,436 | 28.76 | $41,299.4 | |
| 2026-07-01 | LOWN CHRISTIAN M. | Chief Financial Officer | F | 5,597 | 29.36 | $164,327.9 | |
| 2026-06-23 | Glaser Rachel C | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | BERISFORD JOHN L | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | Hill John W | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | Brunner Angelique G. | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | Musslewhite Robert W | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | Sams Louise S | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-23 | McCarthy Christine M | Director | A | 8,262 | 0.00 | $0 | |
| 2026-06-15 | Cann Cynthia Cammett | Chief Accounting Officer | F | 461 | 32.04 | $14,770.4 | |
| 2026-05-01 | FLORANCE ANDREW C | President and CEO | P | 68,330 | 35.17 | $2.4M | |
| 2026-05-01 | FLORANCE ANDREW C | President and CEO | P | 3,100 | 35.82 | $111,042 | |
| 2026-03-15 | Boxer Gene | General Counsel and Secretary | F | 482 | 43.63 | $21,029.7 | |
| 2026-03-15 | Ruggles Lisa | Senior VP, Global Operations | F | 2,977 | 43.63 | $129,886.5 | |
| 2026-03-15 | Boxer Gene | General Counsel and Secretary | F | 428 | 43.63 | $18,673.6 | |
| 2026-03-15 | SIMURO FRANK | Chief Technology Officer | F | 11,107 | 43.63 | $484,598.4 | |
| 2026-03-15 | DESMARAIS MICHAEL J | Chief Human Resources Officer | F | 2,873 | 43.63 | $125,349 | |
| 2026-03-15 | Cann Cynthia Cammett | Chief Accounting Officer | F | 1,194 | 43.63 | $52,094.2 | |
| 2026-03-10 | Cann Cynthia Cammett | Chief Accounting Officer | A | 4,374 | — | — | |
| 2026-03-10 | FLORANCE ANDREW C | President and CEO | A | 124,162 | — | — | |
| 2026-03-10 | LOWN CHRISTIAN M. | Chief Financial Officer | A | 12,268 | — | — | |
| 2026-03-10 | Boxer Gene | General Counsel and Secretary | A | 21,920 | — | — | |
| 2026-03-10 | DESMARAIS MICHAEL J | Chief Human Resources Officer | A | 17,676 | — | — | |
| 2026-03-06 | Sams Louise S | Director | P | 1,000 | 48.36 | $48,360 | |
| 2026-03-01 | LOWN CHRISTIAN M. | Chief Financial Officer | F | 7,175 | 44.63 | $320,220.3 | |
| 2026-02-27 | LOWN CHRISTIAN M. | Chief Financial Officer | A | 39,652 | 0.00 | $0 | |
| 2026-02-27 | SAINT FREDERICK G. | President, Marketplaces | A | 39,652 | 0.00 | $0 |
Codes are the SEC's: P open-market purchase, S open-market sale; M exercise, F tax withholding, A grant and G gift are routine. A 10b5-1 flag means the trade ran under a plan adopted in advance. Method notes in where the numbers come from.