Michael J. Desmarais is CHRO at COSTAR GROUP, INC. (CSGP). They have made 6 open-market trades across 1 company since 2022, most recently 2026-03-15.
CIK 0001925959
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CSGP | 87,725 | $2.8M |
Shares reported on the most recent Form 4, priced at the 2026-03-17 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSGP | SELL | 2024-11-26 | 2024-11-27 | $79.88 | $439K | -7.2% | -12.3% | -5.8% |
| CSGP | SELL | 2024-04-26 | 2024-04-30 | $92.67 | $352K | -0.4% | -12.4% | -12.6% |
| CSGP | SELL | 2023-03-08 | 2023-03-09 | $70.36 | $394K | -1.3% | +0.1% | +15.9% |
| CSGP | SELL | 2022-10-28 | 2022-10-31 | $82.81 | $215K | +0.5% | -3.2% | -6.9% |
| CSGP | SELL | 2022-08-03 | 2022-08-05 | $72.51 | $145K | +0.8% | +4.5% | +9.5% |
| CSGP | SELL | 2022-05-02 | 2022-05-04 | $63.14 | $63K | -10.8% | -2.2% | +11.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.