Updated Jul 16, 2026 · Last SEC filing 2026-07-08
HUDSON TECHNOLOGIES INC /NY (HDSN) has filed 17 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-08. 6 Form 8-K material event filings were reported by HDSN in the last 90 days. InsiderAlpha tracks every HDSN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0000925528 |
|---|
| Form 4 filings (90d) | 17 |
|---|---|
| Form 8-K filings (90d) | 6 |
| Latest Form 4 filing | 2026-07-08 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Hartree Partners, LP | 10% Owner | P — Open-market purchase | 600 | $5.99 | $4K | SEC | |
| Hartree Partners, LP | 10% Owner | P — Open-market purchase | 4.6K | $5.99 | $28K | SEC | |
| Hartree Partners, LP | 10% Owner | P — Open-market purchase | 271.3K | $5.97 | $1.62M | SEC | |
| Hartree Partners, LP | 10% Owner | P — Open-market purchase | 288.1K | $5.88 | $1.70M | SEC | |
| Hartree Partners, LP | 10% Owner | P — Open-market purchase | 204.8K | $5.68 | $1.16M | SEC | |
| Mansy Loan Nguyen | Director | A — Grant or award | 8.9K | $0.00 | — | SEC | |
| Sheriff Alan | Director | A — Grant or award | 3.2K | $0.00 | — | SEC | |
| Feeler Jeffrey R | Director | A — Grant or award | 3.2K | $0.00 | — | SEC | |
| Prouty Eric A | Director | A — Grant or award | 4.4K | $0.00 | — | SEC | |
| Bertaux Brian J. | Chief Financial Officer | P — Open-market purchase | 2.0K | $4.87 | $10K | SEC | |
| Bulgarino Nicole E | Director | P — Open-market purchase | 550 | $4.84 | $3K | SEC | |
| Mansy Loan Nguyen | Director | P — Open-market purchase | 3.6K | $4.96 | $18K | SEC | |
| Parrillo Richard | Director | P — Open-market purchase | 3.6K | $4.96 | $18K | SEC | |
| Parrillo Richard | Director | P — Open-market purchase | 1.4K | $4.97 | $7K | SEC | |
| Mansy Loan Nguyen | Director | P — Open-market purchase | 1.4K | $4.97 | $7K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for HUDSON TECHNOLOGIES INC /NY (HDSN). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Hartree Partners, LP | 5 | $4.51M |
| Parrillo Richard | 4 | $73K |
| Mansy Loan Nguyen | 4 | $25K |
| Sheriff Alan | 3 | $25K |
| Prouty Eric A | 3 | $24K |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in HDSN insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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