Alan Sheriff is Director at HUDSON TECHNOLOGIES INC /NY (HDSN). They have made 1 open-market trade across 1 company since 2026, most recently 2026-06-17.
CIK 0001823076
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 $25K since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| HDSN | 12,484 | $63K |
Shares reported on the most recent Form 4, priced at the 2026-06-22 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 |
|---|---|---|---|---|---|---|---|---|
| HDSN | BUY | 2026-05-13 | 2026-05-15 | $4.88 | $25K | +6.8% | +11.3% | +12.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.