Hudson Technologies Inc. (HDSN)
Hudson Technologies Inc. (HDSN) Insider Trading
Directors, officers and holders of more than 10% of HDSN report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 73 transactions on file: 29 with code P, 0 with code S and 21 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Nov 2, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 41,290 | $4.25 | $175,483 |
| Oct 30, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 58,710 | $4.25 | $249,506 |
| Oct 29, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 200,000 | $4.44 | $888,600 |
| Sep 24, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 118,549 | $5.10 | $604,446 |
| Sep 23, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 11,013 | $5.10 | $56,166 |
| Sep 21, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 2,502 | $5.10 | $12,757 |
| Sep 16, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 11,136 | $5.10 | $56,794 |
| Sep 2, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 5,317 | $5.10 | $27,117 |
| Aug 25, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 91,166 | $5.50 | $501,094 |
| Aug 24, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 9,446 | $5.50 | $51,953 |
| Aug 12, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 5,198 | $5.50 | $28,589 |
| Jul 21, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 47,708 | $5.99 | $285,742 |
| Jul 20, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 17,842 | $5.99 | $106,859 |
| Jul 7, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 600 | $5.99 | $3,594 |
| Jul 6, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 4,634 | $5.99 | $27,758 |
| Jul 2, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 271,302 | $5.97 | $1,619,212 |
| Jul 1, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 288,111 | $5.88 | $1,695,101 |
| Jun 30, 2026 | Hartree Partners, LP | 10% Owner | P Purchase | 204,789 | $5.68 | $1,162,894 |
| Jun 17, 2026 | Prouty Eric A | Director | A Award | 4,440 | Not measured | Not measured |
| Jun 17, 2026 | Mansy Loan Nguyen | Director | A Award | 8,881 | Not measured | Not measured |
| Jun 17, 2026 | Feeler Jeffrey R | Director | A Award | 15,360 | Not measured | Not measured |
| Jun 17, 2026 | Bulgarino Nicole E | Director | A Award | 31,780 | Not measured | Not measured |
| Jun 17, 2026 | Mansy Loan Nguyen | Director | A Award | 21,186 | Not measured | Not measured |
| Jun 17, 2026 | Feeler Jeffrey R | Director | A Award | 3,219 | Not measured | Not measured |
| Jun 17, 2026 | Parrillo Richard | Director | A Award | 31,780 | Not measured | Not measured |
| Jun 17, 2026 | Prouty Eric A | Director | A Award | 21,186 | Not measured | Not measured |
| Jun 17, 2026 | Sheriff Alan | Director | A Award | 15,360 | Not measured | Not measured |
| Jun 17, 2026 | Sheriff Alan | Director | A Award | 3,219 | Not measured | Not measured |
| May 19, 2026 | Bertaux Brian J. | Chief Financial Officer | P Purchase | 2,000 | $4.87 | $9,740 |
| May 14, 2026 | Mansy Loan Nguyen | Director | P Purchase | 3,600 | $4.96 | $17,856 |
| May 14, 2026 | Mansy Loan Nguyen | Director | P Purchase | 1,400 | $4.97 | $6,958 |
| May 14, 2026 | Parrillo Richard | Director | P Purchase | 1,400 | $4.97 | $6,958 |
| May 14, 2026 | Feeler Jeffrey R | Director | P Purchase | 5,100 | $4.92 | $25,092 |
| May 14, 2026 | Bulgarino Nicole E | Director | P Purchase | 550 | $4.84 | $2,665 |
| May 14, 2026 | Parrillo Richard | Director | P Purchase | 3,600 | $4.96 | $17,856 |
| May 13, 2026 | Prouty Eric A | Director | P Purchase | 5,000 | $4.84 | $24,200 |
| May 13, 2026 | Gaglione Kenneth | President and CEO | P Purchase | 5,000 | $4.89 | $24,475 |
| May 13, 2026 | Parrillo Richard | Director | P Purchase | 10,000 | $4.83 | $48,257 |
| May 13, 2026 | Sheriff Alan | Director | P Purchase | 5,200 | $4.88 | $25,350 |
| Apr 10, 2026 | Feeler Jeffrey R | Director | A Award | 4,065 | Not measured | Not measured |
| Apr 10, 2026 | Sheriff Alan | Director | A Award | 4,065 | Not measured | Not measured |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 47,619 | Not measured | Not measured |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | F Tax Payment | 44,873 | $7.10 | $318,598 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 47,619 | $1.60 | $76,190 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | F Tax Payment | 21,797 | $7.10 | $154,759 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 50,888 | $3.81 | $193,883 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | F Tax Payment | 34,382 | $7.10 | $244,112 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 120,000 | Not measured | Not measured |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 120,000 | $0.7500 | $90,000 |
| Jan 8, 2026 | Houghton Kathleen | Sr. VP-Sales and Marketing | M Exercise | 50,888 | Not measured | Not measured |
The full Form 4 history is on the HDSN company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.