HUDSON TECHNOLOGIES INC /NY (HDSN) insider trading
HUDSON TECHNOLOGIES INC /NY insiders have made 3 open-market purchases worth $730k since Sep 18, 2026, by 1 insider. The latest: Hartree Partners, LP (10% owner) bought $604k, filed Sep 28, 2026, scored 11 out of 100.
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Insider purchases
| Filed | Insider | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Sep 28 Form 4 (opens sec.gov) |
Hartree Partners, LP10% owner10% owner · Near 52-week low | +2% stake | 11 | $604k 118,549 at $5.10 |
+3.1% | −14.2% |
| Sep 23 Form 4 (opens sec.gov) |
Hartree Partners, LP10% owner10% owner · Near 52-week low | +0% stake | 4 | $69k 13,515 at $5.10 |
+0.4% | +0.2% |
| Sep 18 Form 4 (opens sec.gov) |
Hartree Partners, LP10% owner10% owner · Near 52-week low | +0% stake | 4 | $57k 11,136 at $5.10 |
−1.7% | +4.2% |
Track record (hypothetical): a week after the filing, these buys averaged +0.6% (67% up, 3 measured); a month after, −3.2% (67% up, 3 measured).
Insiders who bought HDSN
- Hartree Partners, LP 10% owner
Questions
Are insiders buying HDSN stock?
Yes. In the last 90 days, 3 open-market purchases were filed, worth $730k.
Who bought HDSN stock most recently?
Hartree Partners, LP, 10% owner, bought 118,549 shares for $604k (Form 4 (opens sec.gov), filed Sep 28, 2026).
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Sep 28, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer