Richard Parrillo is Director at HUDSON TECHNOLOGIES INC /NY (HDSN). They have made 9 open-market trades across 1 company since 2015, most recently 2026-05-14.
CIK 0001620726
5 open-market purchases totalling $584K since 2015, against 4 sales. Across 5 scored buys the stock is down 2.5% at ninety days, and 5.7 points behind the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| HDSN | 195,746 | $981K |
Shares reported on the most recent Form 4, priced at the 2026-05-21 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 80% | 60% | 40% |
| Avg Move | +3.0% | +3.9% | -2.5% |
| Alpha | +3.0% | +2.7% | -5.7% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| HDSN | BUY | 2026-05-14 | 2026-05-15 | $4.96 | $25K | +6.8% | +11.3% | +12.6% |
| HDSN | BUY | 2026-05-13 | 2026-05-21 | $4.83 | $48K | +1.4% | +11.5% | +12.8% |
| HDSN | SELL | 2023-12-12 | 2023-12-14 | $13.04 | $1.3M | +1.0% | -4.0% | -15.4% |
| HDSN | BUY | 2018-05-30 | 2018-05-31 | $2.27 | $57K | +3.2% | -7.2% | -21.2% |
| HDSN | BUY | 2017-12-15 | 2017-12-19 | $5.80 | $58K | +6.0% | +5.6% | -15.0% |
| HDSN | SELL | 2016-08-10 | 2016-08-16 | $4.94 | $142K | +15.1% | +5.2% | +36.5% |
| HDSN | SELL | 2016-08-05 | 2016-08-16 | $4.93 | $170K | +15.1% | +5.2% | +36.5% |
| HDSN | SELL | 2015-08-05 | 2016-08-09 | $4.93 | $104K | +11.0% | +23.9% | +39.5% |
| HDSN | BUY | 2015-05-08 | 2015-05-12 | $3.96 | $396K | -2.3% | -1.7% | -1.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.