| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| COLEMAN BRIAN F | Director | C/O HUDSON TECHNOLOGIES, INC., 300 TICE BOULEVARD SUITE 290, WOODCLIFF LAKE | /s/ Brian F. Coleman | 08 Dec 2025 | 0001250706 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HDSN | Common Stock | Sale | -$3.59M | -485K | -19.95% | $7.40 | 1.94M | 05 Dec 2025 | Direct |