| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Bulgarino Nicole E | Director | C/O HUDSON TECHNOLOGIES, INC., 300 TICE BOULEVARD, SUITE 290, WOODCLIFF LAKE | /s/ Nicole E. Bulgarino | 20 Jun 2025 | 0001640972 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HDSN | Common Stock | Award | $0 | +3,182 | +43% | $0.000000 | 10,498 | 18 Jun 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HDSN | Stock Options | Award | $0 | +13,698 | $0.000000 | 13,698 | 18 Jun 2025 | Common Stock | 13,698 | $7.86 | Direct |