HUDSON TECHNOLOGIES INC (HDSN) — insider trading
Industrials · NASDAQ
HUDSON TECHNOLOGIES INC (HDSN) has 39 reported SEC Form 4 insider transactions in our data, including 27 open-market purchases among the most recent 39 (latest 2026-09-24).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-24 | Hartree Partners, LP | 10% owner | Open-market purchase | 118,549 | $5.10 | $604.4K | Form 4 |
| 2026-09-23 | Hartree Partners, LP | 10% owner | Open-market purchase | 11,013 | $5.10 | $56.2K | Form 4 |
| 2026-09-21 | Hartree Partners, LP | 10% owner | Open-market purchase | 2,502 | $5.10 | $12.8K | Form 4 |
| 2026-09-16 | Hartree Partners, LP | 10% owner | Open-market purchase | 11,136 | $5.10 | $56.8K | Form 4 |
| 2026-09-02 | Hartree Partners, LP | 10% owner | Open-market purchase | 5,317 | $5.10 | $27.1K | Form 4 |
| 2026-08-25 | Hartree Partners, LP | 10% owner | Open-market purchase | 91,166 | $5.50 | $501.1K | Form 4 |
| 2026-08-24 | Hartree Partners, LP | 10% owner | Open-market purchase | 9,446 | $5.50 | $52.0K | Form 4 |
| 2026-08-12 | Hartree Partners, LP | 10% owner | Open-market purchase | 5,198 | $5.50 | $28.6K | Form 4 |
| 2026-07-29 | Hartree Partners, LP | 10% owner | Open-market purchase | 52,104 | $5.99 | $312.1K | Form 4 |
| 2026-07-21 | Hartree Partners, LP | 10% owner | Open-market purchase | 47,708 | $5.99 | $285.7K | Form 4 |
| 2026-07-20 | Hartree Partners, LP | 10% owner | Open-market purchase | 17,842 | $5.99 | $106.9K | Form 4 |
| 2026-07-07 | Hartree Partners, LP | 10% owner | Open-market purchase | 600 | $5.99 | $3.6K | Form 4 |
| 2026-07-06 | Hartree Partners, LP | 10% owner | Open-market purchase | 4,634 | $5.99 | $27.8K | Form 4 |
| 2026-07-02 | Hartree Partners, LP | 10% owner | Open-market purchase | 271,302 | $5.97 | $1.62M | Form 4 |
| 2026-07-01 | Hartree Partners, LP | 10% owner | Open-market purchase | 288,111 | $5.88 | $1.70M | Form 4 |
| 2026-06-30 | Hartree Partners, LP | 10% owner | Open-market purchase | 204,789 | $5.68 | $1.16M | Form 4 |
| 2026-06-17 | Feeler Jeffrey R | Director | Grant / award / vesting (derivative) | 15,360 | — | $0 | Form 4 |
| 2026-06-17 | Feeler Jeffrey R | Director | Grant / award / vesting | 3,219 | — | $0 | Form 4 |
| 2026-06-17 | Bulgarino Nicole E | Director | Grant / award / vesting (derivative) | 31,780 | — | $0 | Form 4 |
| 2026-06-17 | Mansy Loan Nguyen | Director | Grant / award / vesting (derivative) | 21,186 | — | $0 | Form 4 |
| 2026-06-17 | Mansy Loan Nguyen | Director | Grant / award / vesting | 8,881 | — | $0 | Form 4 |
| 2026-06-17 | Parrillo Richard | Director | Grant / award / vesting (derivative) | 31,780 | — | $0 | Form 4 |
| 2026-06-17 | Prouty Eric A | Director | Grant / award / vesting (derivative) | 21,186 | — | $0 | Form 4 |
| 2026-06-17 | Prouty Eric A | Director | Grant / award / vesting | 4,440 | — | $0 | Form 4 |
| 2026-06-17 | Sheriff Alan | Director | Grant / award / vesting (derivative) | 15,360 | — | $0 | Form 4 |
| 2026-06-17 | Sheriff Alan | Director | Grant / award / vesting | 3,219 | — | $0 | Form 4 |
| 2026-05-19 | Bertaux Brian J. | Officer (Chief Financial Officer) | Open-market purchase | 2,000 | $4.87 | $9.7K | Form 4 |
| 2026-05-14 | Feeler Jeffrey R | Director | Open-market purchase | 5,100 | $4.92 | $25.1K | Form 4 |
| 2026-05-14 | Bulgarino Nicole E | Director | Open-market purchase | 550 | $4.85 | $2.7K | Form 4 |
| 2026-05-14 | Parrillo Richard | Director | Open-market purchase | 1,400 | $4.97 | $7.0K | Form 4 |
| 2026-05-14 | Parrillo Richard | Director | Open-market purchase | 3,600 | $4.96 | $17.9K | Form 4 |
| 2026-05-14 | Mansy Loan Nguyen | Director | Open-market purchase | 1,400 | $4.97 | $7.0K | Form 4 |
| 2026-05-14 | Mansy Loan Nguyen | Director | Open-market purchase | 3,600 | $4.96 | $17.9K | Form 4 |
| 2026-05-13 | Parrillo Richard | Director | Open-market purchase | 10,000 | $4.83 | $48.3K | Form 4/A |
| 2026-05-13 | Gaglione Kenneth | Director, Officer (President and CEO) | Open-market purchase | 5,000 | $4.90 | $24.5K | Form 4 |
| 2026-05-13 | Sheriff Alan | Director | Open-market purchase | 5,200 | $4.88 | $25.4K | Form 4 |
| 2026-05-13 | Prouty Eric A | Director | Open-market purchase | 5,000 | $4.84 | $24.2K | Form 4 |
| 2026-04-10 | Feeler Jeffrey R | Director | Grant / award / vesting | 4,065 | — | $0 | Form 4 |
| 2026-04-10 | Sheriff Alan | Director | Grant / award / vesting | 4,065 | — | $0 | Form 4 |
Ask the chat about HDSN's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: HUDSON TECHNOLOGIES INC (HDSN).
Last updated 2026-09-24 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.