Louise S. Sams is Director at COSTAR GROUP, INC. (CSGP). They have made 1 open-market trade across 1 company since 2026, most recently 2026-07-23.
CIK 0001796961
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.
1 open-market purchase totalling $48K since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CSGP | 28,671 | $926K |
| ROL | 11,324 | $379K |
| LOOP | 259,678 | $86K |
| Total | $1.4M |
Shares reported on the most recent Form 4, priced at the 2026-07-24 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSGP | BUY | 2026-03-06 | 2026-03-09 | $48.36 | $48K | -10.3% | -18.7% | -30.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.