What CoStar Group, Inc.'s executives and directors are doing with their own shares, from SEC Form 3/4/5 filings — separating what the filings state (awards, withholding, disclosed plans) from what only the pattern of dates shows.
| 3 months | 12 months | |
|---|---|---|
| Open-market buys | 1 | 7 |
| Sells | 2 | 4 |
| Total trades | 6 | 53 |
| 3 months | 12 months | |
|---|---|---|
| Acquired | 0 | 0 |
| Disposed | 0 | 0 |
| Net activity | +0 | +0 |
Common stock only — 53 reported trades in the last 12 months are in a security these totals do not cover.
View rich charts and dive into the patterns of specific insiders — who is accumulating, who is winding down, and which sale explanations the filings actually support.
| Insider | Relation | Date | Transaction | Shares | Price | Value | Shares held |
|---|---|---|---|---|---|---|---|
| Rossmann Robin Jack | Chief Financial Officer | Oct 15 | Withheld — tax / exercise cost · F | −756 | $32.00 | −$24.2K | 85,935 |
| Cann Cynthia Cammett | Chief Accounting Officer | Aug 07 | Open-market sale · S | −4,788 | $30.78 | −$147K | 18,822 |
| Hill John W | Director | Aug 05 | Open-market sale · S | −3,500 | $30.21 | −$106K | 22,993 |
| Florance Andrew C | Founder and CEO | Aug 04 | Open-market buy · P | +83,300 | $29.89 | +$2.49M | 1,806,165 |
| Cann Cynthia Cammett | Chief Accounting Officer | Aug 01 | Withheld — tax / exercise cost · F | −1,077 | $28.76 | −$31K | 23,610 |
| Saint Frederick G. | President, Marketplaces | Aug 01 | Withheld — tax / exercise cost · F | −1,436 | $28.76 | −$41.3K | 278,415 |
| Lown Christian M. | Chief Financial Officer | Jul 01 | Withheld — tax / exercise cost · F | −5,597 | $29.36 | −$164K | 129,653 |
| Sams Louise S | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 28,671 |
| Musslewhite Robert W | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 26,539 |
| Brunner Angelique G. | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 18,428 |
| Hill John W | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 26,493 |
| Berisford John L | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 11,235 |
| Glaser Rachel C | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 12,419 |
| McCarthy Christine M | Director | Jun 23 | Grant / award · A | +8,262 | — | — | 11,585 |
| Cann Cynthia Cammett | Chief Accounting Officer | Jun 15 | Withheld — tax / exercise cost · F | −461 | $32.04 | −$14.8K | 24,687 |
| Florance Andrew C | President and CEO | May 01 | Open-market buy · P | +3,100 | $35.82 | +$111K | 1,722,865 |
| Florance Andrew C | President and CEO | May 01 | Open-market buy · P | +68,330 | $35.17 | +$2.4M | 1,719,765 |
| Cann Cynthia Cammett | Chief Accounting Officer | Mar 15 | Withheld — tax / exercise cost · F | −1,194 | $43.63 | −$52.1K | 25,148 |
| Desmarais Michael J | Chief Human Resources Officer | Mar 15 | Withheld — tax / exercise cost · F | −2,873 | $43.63 | −$125K | 87,725 |
| Simuro Frank | Chief Technology Officer | Mar 15 | Withheld — tax / exercise cost · F | −11,107 | $43.63 | −$485K | 414,491 |
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