William D. Lambert is EVP and CFO at Matador Resources Co (MTDR). They have made 1 open-market trade across 1 company since 2025, most recently 2025-09-12.
CIK 0002074217
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 $7K since 2025, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MTDR | 650 | $37K |
Shares reported on the most recent Form 4, priced at the 2025-09-15 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MTDR | BUY | 2025-09-12 | 2025-09-15 | $48.04 | $7K | +1.8% | -8.6% | -8.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.