SEC Form 4 · Updated Daily
HDSN
— HUDSON TECHNOLOGIES, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Hartree Partners, LP | 10%+ Owner | 5,348,517 | 2026-09-24 | P |
| Estate of Kevin J. Zugibe | 10%+ Owner | 4,413,424 | 2020-11-30 | M |
| ZUGIBE KEVIN J | Director · Officer | 3,604,923 | 2018-05-23 | P |
| JPMP CAPITAL CORP. | 10%+ Owner | 3,113,802 | 2007-09-25 | S |
| FLEMING US DISCOVERY FUND III LP | Reporting Owner | 3,113,802 | 2007-09-25 | S |
| COLEMAN BRIAN F | Director · Officer | 426,968 | 2025-12-05 | S |
| MANDRACCHIA STEPHEN P | Director | 396,756 | 2023-01-06 | G |
| BUSCEMI JAMES R | Officer | 366,775 | 2015-03-14 | M |
| HARKINS CHARLES F | Officer | 260,000 | 2016-08-22 | M |
| MONETTA DOMINIC J | Director | 208,836 | 2021-09-13 | M |
| Krishnamurti Nat | Officer | 200,207 | 2022-11-08 | M |
| Parrillo Richard | Director | 195,746 | 2026-05-13 | P |
| Houghton Kathleen | Director · Officer | 193,000 | 2026-01-08 | M |
| ABBATECOLA VINCENT P | Director | 169,748 | 2025-11-17 | P |
| Prouty Eric A | Director | 158,292 | 2026-06-17 | A |
| BURR ROBERT L | Director | 127,174 | 2007-09-27 | J |
| MORCH OTTO C | Director | 87,366 | 2022-07-05 | M |
| Stoody Robert | Officer | 70,047 | 2026-01-30 | — |
| Mansy Loan Nguyen | Director | 34,476 | 2026-06-17 | A |
| Sheriff Alan | Director | 12,484 | 2026-06-17 | A |
| Feeler Jeffrey R | Director | 12,384 | 2026-06-17 | A |
| Bulgarino Nicole E | Officer | 11,048 | 2026-05-14 | P |
| Frizzley Jill Kathleen | Director | 10,204 | 2020-07-20 | A |
| Caruso Richard Damian | Director | 6,573 | 2021-07-01 | A |
| Gaglione Kenneth | Director · Officer | 5,000 | 2026-05-13 | P |
| Bertaux Brian J. | Officer | 2,000 | 2026-05-19 | P |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-24 | Hartree Partners, LP | Open-market buy | 118,549 | $5.10 | 5,348,517 |
| 2026-09-23 | Hartree Partners, LP | Open-market buy | 11,013 | $5.10 | 5,229,968 |
| 2026-09-21 | Hartree Partners, LP | Open-market buy | 2,502 | $5.10 | 5,218,955 |
| 2026-09-16 | Hartree Partners, LP | Open-market buy | 11,136 | $5.10 | 5,216,453 |
| 2026-09-02 | Hartree Partners, LP | Open-market buy | 5,317 | $5.10 | 5,205,317 |
| 2026-08-25 | Hartree Partners, LP | Open-market buy | 91,166 | $5.50 | 5,200,000 |
| 2026-08-24 | Hartree Partners, LP | Open-market buy | 9,446 | $5.50 | 5,108,834 |
| 2026-08-12 | Hartree Partners, LP | Open-market buy | 5,198 | $5.50 | 5,099,388 |
| 2026-07-29 | Hartree Partners, LP | Open-market buy | 52,104 | $5.99 | 5,094,190 |
| 2026-07-21 | Hartree Partners, LP | Open-market buy | 47,708 | $5.99 | 5,042,086 |
| 2026-07-20 | Hartree Partners, LP | Open-market buy | 17,842 | $5.99 | 4,994,378 |
| 2026-07-07 | Hartree Partners, LP | Open-market buy | 600 | $5.99 | 4,976,536 |
| 2026-07-06 | Hartree Partners, LP | Open-market buy | 4,634 | $5.99 | 4,975,936 |
| 2026-07-02 | Hartree Partners, LP | Open-market buy | 271,302 | $5.97 | 4,971,302 |
| 2026-07-01 | Hartree Partners, LP | Open-market buy | 288,111 | $5.88 | 4,700,000 |
| 2026-06-30 | Hartree Partners, LP | — | — | — | 4,207,100 |
| 2026-06-30 | Hartree Partners, LP | Open-market buy | 204,789 | $5.68 | 4,411,889 |
| 2026-06-17 | Feeler Jeffrey R | Grant / award (derivative) | 15,360 | $0.00 | 15,360 |
| 2026-06-17 | Feeler Jeffrey R | Grant / award | 3,219 | $0.00 | 12,384 |
| 2026-06-17 | Bulgarino Nicole E | Grant / award (derivative) | 31,780 | $0.00 | 31,780 |
| 2026-06-17 | Mansy Loan Nguyen | Grant / award (derivative) | 21,186 | $0.00 | 21,186 |
| 2026-06-17 | Mansy Loan Nguyen | Grant / award | 8,881 | $0.00 | 34,476 |
| 2026-06-17 | Parrillo Richard | Grant / award (derivative) | 31,780 | $0.00 | 31,780 |
| 2026-06-17 | Prouty Eric A | Grant / award (derivative) | 21,186 | $0.00 | 21,186 |
| 2026-06-17 | Prouty Eric A | Grant / award | 4,440 | $0.00 | 158,292 |
| 2026-06-17 | Sheriff Alan | Grant / award (derivative) | 15,360 | $0.00 | 15,360 |
| 2026-06-17 | Sheriff Alan | Grant / award | 3,219 | $0.00 | 12,484 |
| 2026-05-19 | Bertaux Brian J. | Open-market buy | 2,000 | $4.87 | 2,000 |
| 2026-05-14 | Feeler Jeffrey R | Open-market buy | 5,100 | $4.92 | 9,165 |
| 2026-05-14 | Bulgarino Nicole E | Open-market buy | 550 | $4.84 | 11,048 |
| 2026-05-14 | Parrillo Richard | Open-market buy | 1,400 | $4.97 | 25,595 |
| 2026-05-14 | Parrillo Richard | Open-market buy | 3,600 | $4.96 | 24,195 |
| 2026-05-14 | Mansy Loan Nguyen | Open-market buy | 1,400 | $4.97 | 25,595 |
| 2026-05-14 | Mansy Loan Nguyen | Open-market buy | 3,600 | $4.96 | 24,195 |
| 2026-05-13 | Gaglione Kenneth | Open-market buy | 5,000 | $4.89 | 5,000 |
| 2026-05-13 | Sheriff Alan | Open-market buy | 5,200 | $4.88 | 9,265 |
| 2026-05-13 | Prouty Eric A | Open-market buy | 5,000 | $4.84 | 153,852 |
| 2026-05-13 | Parrillo Richard | Open-market buy | 10,000 | $4.83 | 195,746 |
| 2026-04-10 | Feeler Jeffrey R | — | — | — | 0 |
| 2026-04-10 | Sheriff Alan | — | — | — | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.