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HUDSON TECHNOLOGIES INC /NY

HDSN Net selling
CIK 0000925528 #3808 in the set updated 17 Sep 2026
Bought (120 mo)
$6.36M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$12.97M
$0.00 on a plan · $885.29K straight out of an exercise
Sold at will
$12.09M
59 of 64 sales
Net
−$6.61M
−$5.72M against sales at will

By person

20 insiders · 176 transactions
8.3×

Kenneth Gaglione holds 8.3 times base salary in stock. $445.51K of shares against $53.46K in salary for 2025.

Salary from the company's own proxy. The shares are what Kenneth Gaglione last reported holding, valued at $5.10, the price Common Stock, par value $0.01 was last bought or sold at on the open market here, on 2 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Hartree Partners, LP entity
10% owner
$5.82M (12)
—
+$5.82M
5,205,317
12.37%
$26.55M
+23.7%
MANDRACCHIA STEPHEN P
Director
$11.02K (1)
$4.19M (17)
−$4.18M
4,596,627
10.92%
$23.44M
−11.6%
COLEMAN BRIAN F
Director
$83.27K (4)
$3.59M (1)
−$3.50M
1,944,312
4.62%
$9.92M
−1.0%
Krishnamurti Nat
CFO
—
$1.90M (3)
−$1.90M
25,207
0.0599%
$128.56K
+187.0%
ABBATECOLA VINCENT P
Director
$63.99K (5)
$890.67K (8)
−$826.69K
280,994
0.6676%
$1.43M
+66.7%
Parrillo Richard
Director
$139.62K (9)
$943.62K (14)
−$804.00K
25,595
0.0608%
$130.53K
—
Prouty Eric A
Director
$62.55K (5)
$866.20K (2)
−$803.65K
158,292
0.3761%
$807.29K
+432.9%
MORCH OTTO C
Director
—
$252.84K (4)
−$252.84K
87,366
0.2076%
$445.57K
+273.3%
Gaglione Kenneth
President and CEO
$24.48K (1)
$219.07K (1)
−$194.60K
87,354
0.2075%
$445.51K
+3,394%
MONETTA DOMINIC J
Director
—
$77.04K (5)
−$77.04K
203,049
0.4824%
$1.04M
+94.6%
ZUGIBE KEVIN J
Chairman, CEO
$69.81K (4)
—
+$69.81K
3,604,923
8.57%
$18.39M
+6.3%
Houghton Kathleen
Sr. VP-Sales and Marketing
—
$49.34K (9)
−$49.34K
158,618
0.3769%
$808.95K
—
Sheriff Alan
Director
$25.35K (1)
—
+$25.35K
12,484
0.0297%
$63.67K
—
Feeler Jeffrey R
Director
$25.09K (1)
—
+$25.09K
12,384
0.0294%
$63.16K
—
Mansy Loan Nguyen
Director
$24.81K (2)
—
+$24.81K
34,476
0.0819%
$175.83K
—
Bertaux Brian J.
Chief Financial Officer
$9.74K (1)
—
+$9.74K
2,000
0.0048%
$10.20K
—
Bulgarino Nicole E
Director
$2.66K (1)
—
+$2.66K
11,048
0.0262%
$56.34K
—
Estate of Kevin J. Zugibe entity
10% owner
—
—
—
4,203,536
9.99%
$21.44M
+16.6%
Frizzley Jill Kathleen
Director
—
—
—
10,204
0.0242%
$52.04K
—
Caruso Richard Damian
Director
—
—
—
6,573
0.0156%
$33.52K
—

Individual transactions

176
Insider
Date
Role
Action
Shares
Price
Amount
Hartree Partners, LP
2 Sep 2026
10% owner
Buy
5,317
$5.10
$27.12K
Hartree Partners, LP
25 Aug 2026
10% owner
Buy
91,166
$5.50
$501.09K
Hartree Partners, LP
24 Aug 2026
10% owner
Buy
9,446
$5.50
$51.95K
Hartree Partners, LP
12 Aug 2026
10% owner
Buy
5,198
$5.50
$28.59K
Hartree Partners, LP
29 Jul 2026
10% owner
Buy
52,104
$5.99
$312.10K
Hartree Partners, LP
21 Jul 2026
10% owner
Buy
47,708
$5.99
$285.74K
Hartree Partners, LP
20 Jul 2026
10% owner
Buy
17,842
$5.99
$106.86K
Hartree Partners, LP
7 Jul 2026
10% owner
Buy
600
$5.99
$3.59K
Hartree Partners, LP
6 Jul 2026
10% owner
Buy
4,634
$5.99
$27.76K
Hartree Partners, LP
2 Jul 2026
10% owner
Buy
271,302
$5.97
$1.62M
Hartree Partners, LP
1 Jul 2026
10% owner
Buy
288,111
$5.88
$1.70M
Hartree Partners, LP
30 Jun 2026
10% owner
Buy
204,789
$5.68
$1.16M
Bertaux Brian J.
19 May 2026
Chief Financial Officer
Buy
2,000
$4.87
$9.74K
Feeler Jeffrey R
14 May 2026
Director
Buy
5,100
$4.92
$25.09K
Bulgarino Nicole E
14 May 2026
Director
Buy
550
$4.85
$2.66K
Parrillo Richard
14 May 2026
Director
Buy
1,400
$4.97
$6.96K
Parrillo Richard
14 May 2026
Director
Buy
3,600
$4.96
$17.86K
Mansy Loan Nguyen
14 May 2026
Director
Buy
1,400
$4.97
$6.96K
Mansy Loan Nguyen
14 May 2026
Director
Buy
3,600
$4.96
$17.86K
Gaglione Kenneth
13 May 2026
President and CEO
Buy indirect
5,000
$4.90
$24.48K
Sheriff Alan
13 May 2026
Director
Buy
5,200
$4.88
$25.35K
Prouty Eric A
13 May 2026
Director
Buy
5,000
$4.84
$24.20K
Houghton Kathleen
8 Jan 2026
Sr. VP-Sales and Marketing
Exercised, kept
50,888
$3.81
$193.88K
Houghton Kathleen
8 Jan 2026
Sr. VP-Sales and Marketing
Exercised, kept
47,619
$1.60
$76.19K
Houghton Kathleen
8 Jan 2026
Sr. VP-Sales and Marketing
Exercised, kept
120,000
$0.75
$90.00K
COLEMAN BRIAN F
5 Dec 2025
Director
Sell
484,616
$7.40
$3.59M
ABBATECOLA VINCENT P
17 Nov 2025
Director
Buy
3,500
$6.79
$23.75K
ABBATECOLA VINCENT P
24 Sep 2025
Director
Exercised, kept
4,744
$7.35
$34.87K
Prouty Eric A
31 Jul 2025
Director
Exercised, kept
4,744
$7.35
$34.87K
ABBATECOLA VINCENT P
7 Nov 2024
Director
Buy
2,500
$5.98
$14.95K
ABBATECOLA VINCENT P
14 Jun 2024
Director
Sell
10,000
$9.20
$92.00K
ABBATECOLA VINCENT P
12 Jun 2024
Director
Exercised, kept
8,276
$3.40
$28.14K
Parrillo Richard
14 Dec 2023
Director
Sell
5,103
$13.25
$67.61K
Parrillo Richard
14 Dec 2023
Director
Sell
51
$13.26
$676.26
Parrillo Richard
14 Dec 2023
Director
Sell
51
$13.27
$676.77
Parrillo Richard
14 Dec 2023
Director
Sell
12,686
$13.30
$168.72K
Parrillo Richard
14 Dec 2023
Director
Sell
55
$13.32
$732.60
Parrillo Richard
14 Dec 2023
Director
Sell
2,259
$13.31
$30.07K
Parrillo Richard
13 Dec 2023
Director
Sell
1,000
$12.91
$12.91K
Parrillo Richard
13 Dec 2023
Director
Sell
134
$12.92
$1.73K
Parrillo Richard
13 Dec 2023
Director
Sell
300
$12.96
$3.89K
Parrillo Richard
13 Dec 2023
Director
Sell
9,865
$12.91
$127.36K
Parrillo Richard
13 Dec 2023
Director
Sell
11,100
$12.95
$143.75K
Parrillo Richard
12 Dec 2023
Director
Sell
10,000
$12.85
$128.50K
Parrillo Richard
12 Dec 2023
Director
Sell
10,000
$12.95
$129.50K
Parrillo Richard
12 Dec 2023
Director
Sell
10,000
$12.75
$127.50K
ABBATECOLA VINCENT P
25 Oct 2023
Director
Exercised, kept
21,118
$1.88
$39.70K
Gaglione Kenneth
12 Sep 2023
VP-Operations
Exercised, kept
33,379
$10.09
$336.79K
Gaglione Kenneth
12 Sep 2023
VP-Operations
Exercised, kept
23,902
$3.81
$91.07K
Gaglione Kenneth
12 Sep 2023
VP-Operations
Exercised, kept
23,810
$1.60
$38.10K
Gaglione Kenneth
12 Sep 2023
VP-Operations
Exercised, kept
90,135
$1.23
$110.87K
Parrillo Richard
19 Jul 2023
Director
Exercised, kept
21,739
$0.98
$21.30K
ABBATECOLA VINCENT P
19 Jul 2023
Director
Exercised, kept
21,739
$0.98
$21.30K
Prouty Eric A
14 Jun 2023
Director
Sell
20,000
$9.56
$191.20K
Prouty Eric A
2 Jun 2023
Director
Exercised, kept
43,478
$0.98
$42.61K
ABBATECOLA VINCENT P
14 Mar 2023
Director
Buy
1,000
$8.27
$8.27K
Gaglione Kenneth
13 Dec 2022
VP-Operations
Exercised, kept
23,902
$3.81
$91.07K
Gaglione Kenneth
12 Dec 2022
VP-Operations
Sell
19,000
$11.53
$219.07K
Krishnamurti Nat
9 Nov 2022
CFO
Sell
46,194
$10.13
$467.95K
Krishnamurti Nat
8 Nov 2022
CFO
Sold after exercise
45,000
$10.66
$479.70K
MORCH OTTO C
5 Jul 2022
Director
Exercised, kept
40,000
$0.62
$24.80K
MORCH OTTO C
5 Jul 2022
Director
Exercised, kept
10,281
$3.27
$33.62K
ABBATECOLA VINCENT P
15 Jun 2022
Director
Sell
20,000
$9.75
$194.92K
ABBATECOLA VINCENT P
3 Jun 2022
Director
Sold after exercise
20,000
$9.79
$195.82K
MANDRACCHIA STEPHEN P
31 May 2022
Director
Sell indirect
55,785
$9.70
$541.11K
MANDRACCHIA STEPHEN P
31 May 2022
Director
Sell
27,892
$9.70
$270.55K
MANDRACCHIA STEPHEN P
27 May 2022
Director
Sell indirect
44,215
$9.73
$430.14K
MANDRACCHIA STEPHEN P
27 May 2022
Director
Sell
22,108
$9.73
$215.07K
Prouty Eric A
9 May 2022
Director
Sell
75,000
$9.00
$675.00K
Prouty Eric A
6 May 2022
Director
Exercised, kept
80,000
$0.62
$49.60K
Parrillo Richard
31 Mar 2022
Director
Exercised, kept
1,300
$1.70
$2.21K
Parrillo Richard
31 Mar 2022
Director
Exercised, kept
80,000
$0.62
$49.60K
MANDRACCHIA STEPHEN P
11 Mar 2022
Director
Sell indirect
100,000
$5.78
$578.00K
MANDRACCHIA STEPHEN P
11 Mar 2022
Director
Sell
100,000
$5.75
$575.00K
MANDRACCHIA STEPHEN P
15 Feb 2022
Director
Exercised, kept
25,000
$1.70
$42.50K
Houghton Kathleen
3 Feb 2022
VP - Sales and Marketing
Exercised, kept
20,000
$1.25
$25.00K
ABBATECOLA VINCENT P
16 Dec 2021
Director
Sell
10,000
$3.76
$37.59K
ABBATECOLA VINCENT P
15 Dec 2021
Director
Sell
23,000
$3.84
$88.37K
ABBATECOLA VINCENT P
10 Dec 2021
Director
Sell
35,320
$4.04
$142.80K
Gaglione Kenneth
9 Dec 2021
VP-Operations
Exercised, kept
45,000
$1.23
$55.35K
ABBATECOLA VINCENT P
26 Nov 2021
Director
Exercised, kept
42,553
$1.09
$46.38K
ABBATECOLA VINCENT P
26 Nov 2021
Director
Exercised, kept
39,136
$1.09
$42.66K
MANDRACCHIA STEPHEN P
19 Nov 2021
Director
Sell indirect
7,900
$4.67
$36.89K
MANDRACCHIA STEPHEN P
19 Nov 2021
Director
Sell
7,900
$4.70
$37.15K
MANDRACCHIA STEPHEN P
18 Nov 2021
Director
Sell indirect
92,100
$4.71
$433.79K
MANDRACCHIA STEPHEN P
18 Nov 2021
Director
Sell
92,100
$4.71
$433.79K
Krishnamurti Nat
17 Nov 2021
CFO
Sell
200,000
$4.76
$952.00K
COLEMAN BRIAN F
15 Nov 2021
President, CEO
Exercised, kept
507,100
$1.09
$552.74K
COLEMAN BRIAN F
15 Nov 2021
President, CEO
Exercised, kept
403,300
$1.09
$439.60K
Krishnamurti Nat
15 Nov 2021
CFO
Exercised, kept
247,100
$1.09
$269.34K
Krishnamurti Nat
15 Nov 2021
CFO
Exercised, kept
195,700
$1.09
$213.31K
MONETTA DOMINIC J
13 Sep 2021
Director
Exercised, kept
25,000
$0.75
$18.75K
MONETTA DOMINIC J
13 Sep 2021
Director
Exercised, kept
35,000
$0.75
$26.25K
MONETTA DOMINIC J
13 Sep 2021
Director
Exercised, kept
42,553
$1.09
$46.38K
MONETTA DOMINIC J
13 Sep 2021
Director
Exercised, kept
31,610
$1.09
$34.45K
MONETTA DOMINIC J
13 Sep 2021
Director
Exercised, kept
21,118
$1.88
$39.70K
Prouty Eric A
30 Aug 2021
Director
Exercised, kept
42,553
$1.09
$46.38K
MONETTA DOMINIC J
24 Aug 2021
Director
Exercised, kept
25,000
$1.31
$32.75K
COLEMAN BRIAN F
17 Aug 2021
President, CEO
Buy
5,000
$2.90
$14.50K
COLEMAN BRIAN F
17 Aug 2021
President, CEO
Buy
15,000
$2.89
$43.35K
COLEMAN BRIAN F
17 Aug 2021
President, CEO
Buy
5,000
$2.88
$14.40K
MORCH OTTO C
9 Aug 2021
Director
Sell
57,211
$3.20
$182.90K
MORCH OTTO C
29 Jul 2021
Director
Exercised, kept
83,195
$1.09
$90.68K
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
9,100
$2.89
$26.30K
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
200
$2.90
$579.00
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
700
$2.90
$2.03K
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
2,015
$2.92
$5.88K
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
100
$2.93
$293.00
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
1,000
$2.93
$2.93K
Houghton Kathleen
9 Jun 2021
VP - Sales and Marketing
Sell
200
$2.93
$586.20
Houghton Kathleen
3 Jun 2021
VP - Sales and Marketing
Exercised, kept
125,000
$1.09
$136.25K
Houghton Kathleen
2 Jun 2021
VP - Sales and Marketing
Sell
1,300
$3.00
$3.89K
Houghton Kathleen
2 Jun 2021
VP - Sales and Marketing
Sell
2,282
$3.00
$6.85K
MORCH OTTO C
2 Jun 2021
Director
Sell
13,262
$2.95
$39.18K
Prouty Eric A
2 Jun 2021
Director
Exercised, kept
18,092
$1.76
$31.84K
ABBATECOLA VINCENT P
1 Jun 2021
Director
Sell
16,298
$2.95
$48.08K
Houghton Kathleen
28 May 2021
VP - Sales and Marketing
Exercised, kept
30,000
$2.31
$69.30K
ABBATECOLA VINCENT P
27 May 2021
Director
Exercised, kept
25,000
$1.31
$32.75K
ABBATECOLA VINCENT P
27 May 2021
Director
Exercised, kept
8,224
$1.76
$14.47K
MORCH OTTO C
27 May 2021
Director
Exercised, kept
25,000
$1.31
$32.75K
Parrillo Richard
27 May 2021
Director
Exercised, kept
42,553
$1.09
$46.38K
Parrillo Richard
27 May 2021
Director
Exercised, kept
39,136
$1.09
$42.66K
Parrillo Richard
27 May 2021
Director
Exercised, kept
18,092
$1.76
$31.84K
MANDRACCHIA STEPHEN P
26 May 2021
Director
Sold after exercise indirect
23,927
$2.48
$59.34K
MANDRACCHIA STEPHEN P
26 May 2021
Director
Sold after exercise
23,926
$2.48
$59.34K
MANDRACCHIA STEPHEN P
25 May 2021
Director
Sell indirect
76,073
$2.37
$180.29K
MANDRACCHIA STEPHEN P
25 May 2021
Director
Sell
76,074
$2.37
$180.30K
MANDRACCHIA STEPHEN P
12 Mar 2021
Director
Sell indirect
600
$1.58
$945.00
MANDRACCHIA STEPHEN P
12 Mar 2021
Director
Sell indirect
8,100
$1.57
$12.73K
MANDRACCHIA STEPHEN P
12 Mar 2021
Director
Sell indirect
91,300
$1.57
$143.34K
ABBATECOLA VINCENT P
15 Dec 2020
Director
Sold after exercise
75,000
$1.21
$91.10K
Estate of Kevin J. Zugibe
30 Nov 2020
10% owner
Exercised, kept
375,000
$0.75
$281.25K
Estate of Kevin J. Zugibe
30 Nov 2020
10% owner
Exercised, kept
600,000
$0.75
$450.00K
Estate of Kevin J. Zugibe
30 Nov 2020
10% owner
Exercised, kept
423,000
$1.09
$461.07K
Estate of Kevin J. Zugibe
30 Nov 2020
10% owner
Exercised, kept
484,562
$1.09
$528.17K
MONETTA DOMINIC J
16 Nov 2020
Director
Sell
15,000
$1.15
$17.28K
MONETTA DOMINIC J
10 Aug 2020
Director
Sell
15,000
$1.22
$18.30K
MONETTA DOMINIC J
22 May 2019
Director
Sell
10,000
$2.06
$20.59K
MONETTA DOMINIC J
14 May 2019
Director
Sell
5,801
$1.96
$11.37K
MONETTA DOMINIC J
9 May 2019
Director
Sell
5,000
$1.90
$9.50K
Prouty Eric A
8 May 2019
Director
Buy
5,000
$1.89
$9.45K
Prouty Eric A
12 Dec 2018
Director
Buy
5,000
$1.64
$8.20K
Prouty Eric A
15 Aug 2018
Director
Buy
5,000
$1.81
$9.05K
Parrillo Richard
30 May 2018
Director
Buy
2,000
$2.33
$4.66K
Parrillo Richard
30 May 2018
Director
Buy
5,000
$2.31
$11.55K
Parrillo Richard
30 May 2018
Director
Buy
4,000
$2.28
$9.12K
Parrillo Richard
30 May 2018
Director
Buy
9,000
$2.27
$20.43K
Parrillo Richard
30 May 2018
Director
Buy
5,000
$2.22
$11.10K
Prouty Eric A
24 May 2018
Director
Buy
5,000
$2.33
$11.65K
ZUGIBE KEVIN J
23 May 2018
Chairman, CEO
Buy
2,600
$2.13
$5.54K
ZUGIBE KEVIN J
23 May 2018
Chairman, CEO
Buy
1,100
$2.12
$2.33K
ZUGIBE KEVIN J
23 May 2018
Chairman, CEO
Buy
16,300
$2.11
$34.39K
MORCH OTTO C
18 May 2018
Director
Sell
7,224
$2.52
$18.20K
MORCH OTTO C
18 May 2018
Director
Sell
5,000
$2.51
$12.55K
ZUGIBE KEVIN J
15 Mar 2018
Chairman, CEO
Buy
5,000
$5.51
$27.55K
COLEMAN BRIAN F
15 Mar 2018
President, COO
Buy
2,000
$5.51
$11.02K
ABBATECOLA VINCENT P
15 Mar 2018
Director
Buy indirect
1,000
$5.50
$5.50K
MANDRACCHIA STEPHEN P
15 Mar 2018
VP Legal & Regulatory
Buy indirect
2,000
$5.51
$11.02K
ABBATECOLA VINCENT P
17 Dec 2017
Director
Buy
2,000
$5.76
$11.52K
Parrillo Richard
15 Dec 2017
Director
Buy
5,000
$5.78
$28.90K
Parrillo Richard
15 Dec 2017
Director
Buy
5,000
$5.81
$29.05K
ZUGIBE KEVIN J
17 Nov 2017
Chairman, CEO
Exercised, kept
195,000
$0.85
$165.75K
COLEMAN BRIAN F
17 Nov 2017
President, COO
Exercised, kept
100,300
$0.85
$85.26K
MANDRACCHIA STEPHEN P
17 Nov 2017
VP Legal & Regulatory
Exercised, kept indirect
125,000
$0.85
$106.25K
ABBATECOLA VINCENT P
13 Nov 2017
Director
Exercised, kept
40,000
$0.85
$34.00K
MORCH OTTO C
21 Aug 2017
Director
Exercised, kept
16,600
$8.41
$139.61K
ABBATECOLA VINCENT P
21 Aug 2017
Director
Exercised, kept
26,600
$3.23
$85.92K
Prouty Eric A
21 Aug 2017
Director
Exercised, kept
26,600
$3.23
$85.92K
Parrillo Richard
21 Aug 2017
Director
Exercised, kept
26,600
$3.23
$85.92K
ZUGIBE KEVIN J
18 Aug 2017
Chairman, CEO
Exercised, kept
28,145
$3.55
$99.91K
ZUGIBE KEVIN J
18 Aug 2017
Chairman, CEO
Exercised, kept
251,855
$3.23
$813.49K
MANDRACCHIA STEPHEN P
18 Aug 2017
VP Legal & Regulatory
Exercised, kept indirect
28,145
$3.55
$99.91K
MANDRACCHIA STEPHEN P
18 Aug 2017
VP Legal & Regulatory
Exercised, kept indirect
76,855
$3.23
$248.24K
MONETTA DOMINIC J
18 Aug 2017
Director
Exercised, kept
26,600
$3.23
$85.92K
MORCH OTTO C
14 Nov 2016
Director
Exercised, kept
10,000
$3.23
$32.30K
ZUGIBE KEVIN J
7 Oct 2016
Chairman, Chief Executive Off
Exercised, kept
9,300
$1.02
$9.49K

What was left out

Form 4 filings counted 217
Amendments (4/A) skipped 4
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 5
Sales at will 59
Transactions with no price 0
Shares from compensation/vesting 9,950,732
Sales filed before the plan box existed 42
History held since 7 Sep 2016