🕵️ Hudson Technologies Inc /NY ($HDSN)
SEC insider & ownership activity, last 12 months · CIK 925528 · every row links its SEC filing
Over the last 12 months insiders sold $3.6M against $5.1M of open-market buying. Hartree Partners, LP bought $4.9M (Jun–Jul). Hartree Partners, LP added 9.0% → 11.8%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
10 buyers, $5.1M (19 lots) · 1 seller, $3.6M (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Hartree Partners, LP | 7 | $4.9M | 0 | – | Jul 21, 2026 |
| Brian F. Coleman | 0 | – | 1 | $3.6M | Dec 5, 2025 |
| Parrillo Richard | 3 | $73K | 0 | – | May 14, 2026 |
| Sheriff Alan | 1 | $25K | 0 | – | May 13, 2026 |
| Jeffrey R. Feeler | 1 | $25K | 0 | – | May 14, 2026 |
| Mansy Loan Nguyen | 2 | $25K | 0 | – | May 14, 2026 |
| Gaglione Kenneth | 1 | $24K | 0 | – | May 13, 2026 |
| Eric A. Prouty | 1 | $24K | 0 | – | May 13, 2026 |
| Vincent P. Abbatecola | 1 | $24K | 0 | – | Nov 17, 2025 |
| Brian J. Bertaux | 1 | $10K | 0 | – | May 19, 2026 |
| Nicole E. Bulgarino | 1 | $3K | 0 | – | May 14, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Hartree Partners, LP | 11.8% | 13G | Jul 2, 2026 | filing ↗ | |
| Westerly Capital Management, LLC | 5.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Dimensional Fund Advisors LP | exited | 13G | Jul 14, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Jun 11, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 10, 2026 | filing ↗ |
| Other events (8.01) | May 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 27, 2026 | filing ↗ |
| Material agreement (1.01) | May 19, 2026 | filing ↗ |
| New financial obligation (2.03) | May 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 18, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 10, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 13, 2026 | filing ↗ |
| Other events (8.01) | Mar 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 13, 2026 | filing ↗ |
| Earnings (2.02) | Mar 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 30, 2026 | filing ↗ |
| Other events (8.01) | Jan 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 30, 2026 | filing ↗ |
| Other events (8.01) | Dec 17, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 17, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 9, 2025 | filing ↗ |
| Material agreement (1.01) | Nov 25, 2025 | filing ↗ |
| New financial obligation (2.03) | Nov 25, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 25, 2025 | filing ↗ |