Hudson Technologies Inc. (HDSN) Insider Trading

Last 12 months

Insiders bought $233k on the open market and sold nothing.

Net open-market

+$233k

10 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

9 / 0

executives and directors

Last open-market buy

May 2026

May 19, 2026

Get an email when HDSN's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 24	Hartree Partners, LP Large holder	Bought	118,549	$5.10	$605k	2.3%	Form 4
Sep 21 – 23	Hartree Partners, LP Large holder	Bought 2 parts	13,515	$5.10 average	$69k	0.3%	Form 4
Sep 16	Hartree Partners, LP Large holder	Bought	11,136	$5.10	$57k	0.2%	Form 4
Sep 2	Hartree Partners, LP Large holder	Bought	5,317	$5.10	$27k	0.1%	Form 4
Aug 24 – 25	Hartree Partners, LP Large holder	Bought 2 parts	100,612	$5.50 average	$553k	2.0%	Form 4
Aug 12	Hartree Partners, LP Large holder	Bought	5,198	$5.50	$29k	0.1%	Form 4
Jul 29	Hartree Partners, LP Large holder	Bought	52,104	$5.99	$312k	1.0%	Form 4
Jul 20 – 21	Hartree Partners, LP Large holder	Bought 2 parts	65,550	$5.99 average	$393k	1.3%	Form 4
Jul 6 – 7	Hartree Partners, LP Large holder	Bought 2 parts	5,234	$5.99 average	$31k	0.1%	Form 4
Jun 30 – Jul 2	Hartree Partners, LP Large holder	Bought 3 parts	764,202	$5.86 average	$4.48M	18%	Form 4
May 19	Brian J. Bertaux Chief Financial Officer	Bought	2,000	$4.87	$10k	New	Form 4
May 14	Loan Nguyen Mansy Director	Bought 2 parts	5,000	$4.96 average	$25k	24%	Form 4
May 14	Richard Parrillo Director	Bought 2 parts	5,000	$4.96 average	$25k	24%	Form 4
May 14	Nicole E Bulgarino Director	Bought	550	$4.85	$3k	5.2%	Form 4
May 14	Jeffrey R Feeler Director	Bought	5,100	$4.92	$25k	125%	Form 4
May 13	Richard Parrillo Director	Bought	10,000	$4.83	$48k	5.4%	Form 4
May 13	Eric A Prouty Director	Bought	5,000	$4.84	$24k	3.4%	Form 4
May 13	Alan Sheriff Director	Bought	5,200	$4.88	$25k	128%	Form 4
May 13	Kenneth Gaglione President and CEO	Bought	5,000	$4.90	$25k	13%	Form 4
Dec 5, 2025	Brian F Coleman Other	SoldNo plan	484,616	$7.40	$3.59M	53%	Form 4
Nov 17, 2025	Vincent P Abbatecola Director	Bought	3,500	$6.79	$24k	2.1%	Form 4
Nov 7, 2024	Vincent P Abbatecola Director	Bought	2,500	$5.98	$15k	1.6%	Form 4

Sep 24
Hartree Partners, LP
Large holder · bought 118,549 at $5.10
$605k
2.3% of stake
Sep 21 – 23
Hartree Partners, LP
Large holder · bought 13,515 at avg $5.10
$69k
0.3% of stake
Sep 16
Hartree Partners, LP
Large holder · bought 11,136 at $5.10
$57k
0.2% of stake
Sep 2
Hartree Partners, LP
Large holder · bought 5,317 at $5.10
$27k
0.1% of stake
Aug 24 – 25
Hartree Partners, LP
Large holder · bought 100,612 at avg $5.50
$553k
2.0% of stake
Aug 12
Hartree Partners, LP
Large holder · bought 5,198 at $5.50
$29k
0.1% of stake
Jul 29
Hartree Partners, LP
Large holder · bought 52,104 at $5.99
$312k
1.0% of stake
Jul 20 – 21
Hartree Partners, LP
Large holder · bought 65,550 at avg $5.99
$393k
1.3% of stake
Jul 6 – 7
Hartree Partners, LP
Large holder · bought 5,234 at avg $5.99
$31k
0.1% of stake
Jun 30 – Jul 2
Hartree Partners, LP
Large holder · bought 764,202 at avg $5.86
$4.48M
18% of stake
May 19
Brian J. Bertaux
Chief Financial Officer · bought 2,000 at $4.87
$10k
New position
May 14
Loan Nguyen Mansy
Director · bought 5,000 at avg $4.96
$25k
24% of stake
May 14
Richard Parrillo
Director · bought 5,000 at avg $4.96
$25k
24% of stake
May 14
Nicole E Bulgarino
Director · bought 550 at $4.85
$3k
5.2% of stake
May 14
Jeffrey R Feeler
Director · bought 5,100 at $4.92
$25k
125% of stake
May 13
Richard Parrillo
Director · bought 10,000 at $4.83
$48k
5.4% of stake
May 13
Eric A Prouty
Director · bought 5,000 at $4.84
$24k
3.4% of stake
May 13
Alan Sheriff
Director · bought 5,200 at $4.88
$25k
128% of stake
May 13
Kenneth Gaglione
President and CEO · bought 5,000 at $4.90
$25k
13% of stake
Dec 5, 2025No plan
Brian F Coleman
Other · sold 484,616 at $7.40
$3.59M
53% of stake
Nov 17, 2025
Vincent P Abbatecola
Director · bought 3,500 at $6.79
$24k
2.1% of stake
Nov 7, 2024
Vincent P Abbatecola
Director · bought 2,500 at $5.98
$15k
1.6% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch HDSN, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in HDSN's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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