Hudson Technologies, Inc. (HDSN) Insider Trading
Over the last 3 months, HDSN insiders made 11 open-market buys and 0 sales, a net purchase of $5.8M (SEC Form 4). Over the last 6 months, 94 institutions increased and 112 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
11
Sells (3m)
0
Net (3m)
$5.8M
Insiders buying
Insider trades by month Buys Sells
Nov
Nov
Dec
May
Jul
Aug
Context3-month price +0.7%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 26, 2026 | Hartree Partners, LP10 percent owner | Buy | 91,166 | $5.50 |
| Aug 26, 2026 | Hartree Partners, LP10 percent owner | Buy | 9,446 | $5.50 |
| Aug 14, 2026 | Hartree Partners, LP10 percent owner | Buy | 5,198 | $5.50 |
| Jul 31, 2026 | Hartree Partners, LP10 percent owner | Buy | 52,104 | $5.99 |
| Jul 22, 2026 | Hartree Partners, LP10 percent owner | Buy | 17,842 | $5.99 |
| Jul 22, 2026 | Hartree Partners, LP10 percent owner | Buy | 47,708 | $5.99 |
| Jul 8, 2026 | Hartree Partners, LP10 percent owner | Buy | 600 | $5.99 |
| Jul 8, 2026 | Hartree Partners, LP10 percent owner | Buy | 4,634 | $5.99 |
| Jul 2, 2026 | Hartree Partners, LP10 percent owner | Buy | 271,302 | $5.97 |
| Jul 2, 2026 | Hartree Partners, LP10 percent owner | Buy | 288,111 | $5.88 |
| Jul 2, 2026 | Hartree Partners, LP10 percent owner | Buy | 204,789 | $5.68 |
| Jun 22, 2026 | Feeler Jeffrey Rdirector | Grant | 3,219 | — |
| Jun 22, 2026 | Parrillo Richarddirector | Grant | 31,780 | $5.63 |
| Jun 22, 2026 | Sheriff Alandirector | Grant | 15,360 | $5.63 |
| Jun 22, 2026 | Mansy Loan Nguyendirector | Grant | 21,186 | $5.63 |
| Jun 22, 2026 | Prouty Eric Adirector | Grant | 21,186 | $5.63 |
| Jun 22, 2026 | Sheriff Alandirector | Grant | 3,219 | — |
| Jun 22, 2026 | Bulgarino Nicole Edirector | Grant | 31,780 | $5.63 |
| Jun 22, 2026 | Prouty Eric Adirector | Grant | 4,440 | — |
| Jun 22, 2026 | Mansy Loan Nguyendirector | Grant | 8,881 | — |
| Jun 22, 2026 | Feeler Jeffrey Rdirector | Grant | 15,360 | $5.63 |
| May 21, 2026 | Parrillo Richarddirector | Buy | 10,000 | $4.83 |
| May 21, 2026 | Bertaux Brian J.officer: Chief Financial Officer | Buy | 2,000 | $4.87 |
| May 15, 2026 | Sheriff Alandirector | Buy | 5,200 | $4.88 |
| May 15, 2026 | Bulgarino Nicole Edirector | Buy | 550 | $4.84 |
| May 15, 2026 | Gaglione Kennethdirector, officer: President and CEO | Buy | 5,000 | $4.89 |
| May 15, 2026 | Parrillo Richarddirector | Buy | 1,400 | $4.97 |
| May 15, 2026 | Feeler Jeffrey Rdirector | Buy | 5,100 | $4.92 |
| May 15, 2026 | Prouty Eric Adirector | Buy | 5,000 | $4.84 |
| May 15, 2026 | Parrillo Richarddirector | Buy | 3,600 | $4.96 |
Source: HDSN SEC Form 4 filings, latest Aug 26, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their HDSN positions over the last 6 months (SEC Form 13F).
Increased
94
New positions
52
Reduced
112
Sold out
31
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| Hartree Partners, LP | Increased | 4.4M | Aug 12, 2026 |
| HARTREE PARTNERS, LP | Unchanged | 3.8M | May 12, 2026 |
| WESTERLY CAPITAL MANAGEMENT, LLC | Increased | 3.4M | Aug 14, 2026 |
| WESTERLY CAPITAL MANAGEMENT, LLC | Increased | 3.2M | May 15, 2026 |
| BLACKROCK, INC. | Reduced | 2.9M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 2.8M | Aug 7, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Increased | 2.1M | May 7, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 2.0M | Aug 11, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.7M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 1.7M | Aug 13, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 1.5M | May 14, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 1.5M | May 15, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 1.4M | Aug 13, 2026 |
| NEW SOUTH CAPITAL MANAGEMENT INC | Reduced | 1.2M | May 13, 2026 |
| AMERICAN CENTURY COMPANIES INC | Reduced | 1.2M | Aug 12, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.