Hudson Technologies, Inc. (HDSN)
Nasdaq: HDSN · Wholesale-Machinery, Equipment & Supplies · Pearl River, NY · filing with the SEC since 1996
Grade4.5
◀ Past 4.2● Present 4.6▶ Future 4.5
Who owns Hudson Technologies, Inc.
As filed with the SECHolders of 5% or more
2
Hartree Partners, LP holds 11.8% of Common Stock, par value $0.01, as its SCHEDULE 13G/A filed Jul 2, 2026 says.
Directors and officers
12
report now, of 22 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Hartree Partners, LP
SCHEDULE 13G/A · filed Jul 2, 2026 · Common Stock, par value $0.01 · 9% in Jun 5, 2026
Westerly Capital Management, LLC
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, $0.01 par value · 6% in Jun 24, 2025
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Jul 14, 2026 · Common Stock · reported falling below 5%, from 5.1% in Apr 9, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What HDSN reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
United Suppliers of America Inc and B&B Jobber Services Inc
A company bought · acquisition · May 2024 · owns, named in the 10-K filed Mar 16, 2026
Denver Refrigerants Inc
A company bought · acquisition · owns, named in the 10-K filed Mar 16, 2026
22 subsidiaries in 1 country, from the list filed with the 10-K filed Mar 16, 2026.
Insider tradesForm 4
2sales
12purchases
0sales on a scheduled plan
1people selling
$7.2Msold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Nov 2, 2025 to Nov 2, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 2, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window11 of 24 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Coleman Brian F | President, CEO | 2 | $7.2M | 0 | 0 | $0 |
| Hartree Partners, LP | 10% owner | 0 | $0 | 0 | 19 | $7.9M |
| Parrillo Richard | director | 0 | $0 | 0 | 3 | $100,000 |
| Mansy Loan Nguyen | director | 0 | $0 | 0 | 2 | $0 |
| Gaglione Kenneth | President and CEO | 0 | $0 | 0 | 1 | $0 |
| Bertaux Brian J. | Chief Financial Officer | 0 | $0 | 0 | 1 | $0 |
| Bulgarino Nicole E | director | 0 | $0 | 0 | 1 | $0 |
| Feeler Jeffrey R | director | 0 | $0 | 0 | 1 | $0 |
| Proudy Eric A | director | 0 | $0 | 0 | 1 | $0 |
| Sheriff Alan | director | 0 | $0 | 0 | 1 | $0 |
| Abbatecola Vincent P | director | 0 | $0 | 0 | 1 | $0 |