HDSN insider trading — Hudson Technologies Inc
Over the last 90 days, insiders at Hudson Technologies Inc (HDSN) made 11 open-market purchases worth $2.04M and 0 open-market sales worth $0, making them net buyers by $2.04M. The largest purchase was by Hartree Partners, Lp (10% Owner), who bought 118,549 shares for $604K on Sep 24, 2026.
Updated Oct 16, 2026.
Recent HDSN insider transactions
Every Form 4 filed by Hudson Technologies Inc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 24, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 118,549 | $5.10 | $604K | Form 4 |
| Sep 23, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 11,013 | $5.10 | $56K | Form 4 |
| Sep 21, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 2,502 | $5.10 | $13K | Form 4 |
| Sep 16, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 11,136 | $5.10 | $57K | Form 4 |
| Sep 2, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 5,317 | $5.10 | $27K | Form 4 |
| Aug 25, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 91,166 | $5.50 | $501K | Form 4 |
| Aug 24, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 9,446 | $5.50 | $52K | Form 4 |
| Aug 12, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 5,198 | $5.50 | $29K | Form 4 |
| Jul 29, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 52,104 | $5.99 | $312K | Form 4 |
| Jul 21, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 47,708 | $5.99 | $286K | Form 4 |
| Jul 20, 2026 | Hartree Partners, Lp | 10% Owner | P · Purchase | Direct | 17,842 | $5.99 | $107K | Form 4 |
HDSN insider trading FAQ
Are insiders buying HDSN stock?
Yes. In the last 90 days, Hudson Technologies Inc insiders made 11 open-market purchases totaling $2.04M, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading HDSN?
Recent buyers: Hartree Partners, Lp.
Where does HDSN insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.