HDSN
HUDSON TECHNOLOGIES INC /NY · Wholesale Trade · Market cap $227.7M
Insiders bought $6.6M net in the last 90 days ·0 sellers, 1 buyer· latest Form 4 filed Sep 28, 2026
Insider Buying
$6.8M
reported purchases (SEC code P)
Insider Selling
$3.6M
reported sales (SEC code S)
Unique Insiders
11
in the rolling window
Latest filing
Sep 28, 2026
Hartree Partners, LP
HUDSON TECHNOLOGIES INC /NY (HDSN) has 29 SEC Form 4 filings (42 transaction rows) in the rolling window, disclosed by 11 distinct insiders. Most recent filing: Sep 28, 2026.
Inside the rolling window, 11 insiders at HUDSON TECHNOLOGIES INC /NY reported 26 open-market purchases totaling $6.8M and 1 open-market sale totaling $3.6M. The most active filer is 10% Owner Hartree Partners, LP with 16 filings. Insiders have net bought $6.8M over the trailing 6 months. The largest single insider purchase in this window was $1.7M by 10% Owner Hartree Partners, LP on Jul 1, 2026. The most recent open-market filing is a purchase of 118,549 shares by 10% Owner Hartree Partners, LP, dated Sep 24, 2026, worth $604K.
- Industry:Chemicals - Specialty
- CEO:Kenneth Gaglione
- Employees:281
- HQ:Woodcliff Lake, NJ, US
- IPO:1994-11-01
| Source | |||||||
|---|---|---|---|---|---|---|---|
| 10% Owner | Purchase | 118,549 | $604K | Sep 28 | +6.1% | SEC ↗ | |
| 10% Owner | Purchase | 2,502 | $13K | Sep 23 | +5.3% | SEC ↗ | |
| 10% Owner | Purchase | 11,013 | $56K | Sep 23 | +5.3% | SEC ↗ | |
| 10% Owner | Purchase | 11,136 | $57K | Sep 18 | +4.6% | SEC ↗ | |
| 10% Owner | Purchase | 5,317 | $27K | Sep 4 | +1.1% | SEC ↗ | |
| 10% Owner | Purchase | 9,446 | $52K | Aug 26 | +2.3% | SEC ↗ | |
| 10% Owner | Purchase | 91,166 | $501K | Aug 26 | +2.3% | SEC ↗ | |
| 10% Owner | Purchase | 5,198 | $29K | Aug 14 | -4.6% | SEC ↗ | |
| 10% Owner | Purchase | 52,104 | $312K | Jul 31 | -10.4% | SEC ↗ | |
| 10% Owner | Purchase | 17,842 | $107K | Jul 22 | -12.6% | SEC ↗ | |
| 10% Owner | Purchase | 47,708 | $286K | Jul 22 | — | SEC ↗ | |
| 10% Owner | Purchase | 4,634 | $28K | Jul 8 | — | SEC ↗ | |
| 10% Owner | Purchase | 600 | $4K | Jul 8 | — | SEC ↗ | |
Hartree Partners, LPFirst filing | 10% Owner | Purchase | 204,789 | $1.2M | Jul 2 | — | SEC ↗ |
Hartree Partners, LPFirst filing | 10% Owner | Purchase | 288,111 | $1.7M | Jul 2 | — | SEC ↗ |
Hartree Partners, LPFirst filing | 10% Owner | Purchase | 271,302 | $1.6M | Jul 2 | — | SEC ↗ |
| Director | Purchase | 10,000 | $48K | May 21 | — | SEC ↗ | |
Bertaux Brian J.First filing | Chief Financial Officer | Purchase | 2,000 | $10K | May 21 | — | SEC ↗ |
Bulgarino Nicole EFirst filing | Director | Purchase | 550 | $3K | May 15 | — | SEC ↗ |
Prouty Eric AFirst filing | Director | Purchase | 5,000 | $24K | May 15 | — | SEC ↗ |
Sheriff AlanFirst filing | Director | Purchase | 5,200 | $25K | May 15 | — | SEC ↗ |
Feeler Jeffrey RFirst filing | Director | Purchase | 5,100 | $25K | May 15 | — | SEC ↗ |
Gaglione KennethFirst filing | President and CEO | Purchase | 5,000 | $24K | May 15 | — | SEC ↗ |
Mansy Loan NguyenFirst filing | Director | Purchase | 5,000 | $25K | May 15 | — | SEC ↗ |
Parrillo RichardFirst filing | Director | Purchase | 5,000 | $25K | May 15 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does HDSN have?
HUDSON TECHNOLOGIES INC /NY (HDSN) has 29 SEC Form 4 filings (42 transaction rows) in the rolling 365-day window, disclosed by 11 distinct insiders. Most recent filing: Sep 28, 2026.
When was the most recent SEC Form 4 filing for HDSN?
The most recent Form 4 filing for HDSN on Tracefour is dated Sep 28, 2026.
Who is the most active insider at HDSN?
The most active SEC Form 4 filer at HDSN in the rolling window is 10% Owner Hartree Partners, LP, with 16 filings.
What is the net insider flow at HDSN over the last 6 months?
Over the trailing 180 days, insiders at HDSN have net bought $6.8M based on SEC Form 4 disclosures.
What was the largest insider purchase at HDSN?
The largest single insider open-market purchase at HDSN in the rolling window was $1.7M by 10% Owner Hartree Partners, LP on 2026-07-01.
What is the total insider buy and sell value at HDSN in the current window?
Inside the rolling window, insiders at HDSN bought $6.8M and sold $3.6M based on SEC Form 4 filings.
Can I get alerts for HDSN insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at HUDSON TECHNOLOGIES INC /NY (HDSN). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
HUDSON TECHNOLOGIES INC /NY is in the Wholesale Trade sector.