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PERMA FIX ENVIRONMENTAL SERVICES INC

PESI Net buying
CIK 0000891532 #3383 in the set updated 22 Sep 2026
Bought (120 mo)
$528.95K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$341.66K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$341.66K
4 of 4 sales
Net
+$187.29K
+$187.29K against sales at will

By person

16 insiders · 163 transactions
2.7×

Mark Duff holds only 2.7 times base salary in stock. $1.16M of shares against $417.16K in salary for 2025.

Salary from the company's own proxy. The shares are what Mark Duff last reported holding, valued at $8.60, the price Common Stock was last bought or sold at on the open market here, on 16 Sep 2025.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
REEDER JOE
Director
$100.46K (2)
$293.05K (2)
−$192.59K
239,345
$2.06M
+104.1%
Duff Mark
President and CEO
$176.91K (48)
+$176.91K
134,556
$1.16M
CENTOFANTI LOUIS F
EVP of Strategic Initiatives
$131.85K (45)
+$131.85K
435,090
$3.74M
+17.0%
Shelton Larry
Director
$55.15K (7)
+$55.15K
198,983
$1.71M
+205.9%
Duggan Kerry C
Director
$48.62K (2)
−$48.62K
7,640
$65.70K
Lombardo Andy
EVP of Nuclear & Technical Svc
$33.11K (11)
+$33.11K
17,448
$150.05K
+1,146%
Naccarato Ben
Chief Financial Officer
$16.69K (9)
+$16.69K
48,811
$419.78K
+4,781%
Eshleman Troy
Chief Operating Officer
$9.92K (1)
+$9.92K
1,350
$11.61K
Grondin Richard
EVP of Hanford & Int. Waste Op
$4.87K (1)
+$4.87K
41,308
$355.25K
+114,644%
ZWECKER MARK A
Director
247,606
$2.13M
+76.2%
LAHAV JACK
resigned as Director 10/27/16
197,433
$1.70M
+1.8%
Grumski Joseph Timothy
Director
67,661
$581.89K
Wamp Zach Paul
Director
53,473
$459.87K
Bostick Thomas
Director
50,610
$435.25K
+3,234%
Kugler Gary
Director
46,013
$395.72K
+57.3%
Cochran Stanley Robert
Director
34,711
$298.52K

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Insider
Date
Role
Action
Shares
Price
Amount
Shelton Larry
13 Jul 2026
Director
Exercised, kept
2,400
$4.60
$11.04K
Grondin Richard
20 Jan 2026
EVP of Hanford & Int. Waste Op
Exercised, kept
6,000
$3.95
$23.70K
Grondin Richard
20 Jan 2026
EVP of Hanford & Int. Waste Op
Exercised, kept
5,000
$7.01
$35.03K
Shelton Larry
2 Sep 2025
Director
Exercised, kept
2,400
$4.19
$10.06K
ZWECKER MARK A
28 Aug 2025
Director
Exercised, kept
2,400
$4.19
$10.06K
Grondin Richard
14 Jul 2025
EVP of Hanford & Int. Waste Op
Exercised, kept
6,000
$3.95
$23.70K
Grondin Richard
14 Jul 2025
EVP of Hanford & Int. Waste Op
Exercised, kept
5,000
$7.01
$35.03K
Duff Mark
8 Jan 2025
President and CEO
Exercised, kept
25,000
$3.15
$78.75K
Naccarato Ben
8 Jan 2025
Chief Financial Officer
Exercised, kept
15,000
$3.15
$47.25K
CENTOFANTI LOUIS F
14 Nov 2024
EVP of Strategic Initiatives
Exercised, kept
15,000
$3.15
$47.25K
ZWECKER MARK A
9 Sep 2024
Director
Exercised, kept
2,400
$3.70
$8.88K
Shelton Larry
28 Aug 2024
Director
Exercised, kept
2,400
$3.70
$8.88K
Grondin Richard
26 Mar 2024
EVP of Waste Treatment Ops
Exercised, kept
6,000
$3.95
$23.70K
Grondin Richard
26 Mar 2024
EVP of Waste Treatment Ops
Exercised, kept
10,000
$7.01
$70.05K
Grondin Richard
26 Mar 2024
EVP of Waste Treatment Ops
Exercised, kept
2,000
$3.15
$6.30K
REEDER JOE
11 Jan 2024
Director
Exercised, kept
2,500
$5.15
$12.88K
REEDER JOE
11 Jan 2024
Director
Exercised, kept
5,000
$5.93
$29.65K
Grondin Richard
2 Oct 2023
EVP of Waste Treatment Ops
Exercised, kept
8,000
$3.15
$25.20K
Grondin Richard
2 Oct 2023
EVP of Waste Treatment Ops
Exercised, kept
20,000
$3.60
$72.00K
Shelton Larry
8 Sep 2023
Director
Exercised, kept
2,400
$2.79
$6.68K
Naccarato Ben
22 May 2023
Chief Financial Officer
Exercised, kept
50,000
$3.65
$182.50K
CENTOFANTI LOUIS F
22 May 2023
EVP of Strategic Initiatives
Exercised, kept
50,000
$3.65
$182.50K
Duff Mark
22 May 2023
President and CEO
Exercised, kept
100,000
$3.65
$365.00K
ZWECKER MARK A
25 Apr 2023
Director
Exercised, kept
2,400
$2.79
$6.68K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$6.70
$16.08K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$3.31
$7.94K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$4.30
$10.32K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$3.55
$8.52K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$4.60
$11.04K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$4.19
$10.06K
REEDER JOE
4 Apr 2023
Director
Exercised, kept
2,400
$3.70
$8.88K
REEDER JOE
29 Mar 2023
Director
Exercised, kept
2,400
$2.79
$6.68K
Lombardo Andy
28 Mar 2023
EVP of Nuclear & Technical Svc
Exercised, kept
12,000
$3.60
$43.20K
Duff Mark
9 May 2022
President and CEO
Exercised, kept
50,000
$3.97
$198.50K
Lombardo Andy
3 Feb 2020
EVP of Nuclear & Technical Svs
Exercised, kept
2,000
$3.15
$6.30K

What was left out

Form 4 filings counted 429
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 1
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 4
Transactions with no price 1
Shares from compensation/vesting 1,189,000
History held since 3 Oct 2016