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ONE STOP SYSTEMS, INC.

OSS Net selling
CIK 0001394056 #3645 in the set updated 21 Sep 2026
Bought (120 mo)
$355.53K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$6.49M
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$6.49M
63 of 63 sales
Net
−$6.13M
−$6.13M against sales at will

By person

21 insiders · 127 transactions
21.2×

Mike Knowles holds 21.2 times base salary in stock. $10.40M of shares against $490.33K in salary for 2025.

Salary from the company's own proxy. The shares are what Mike Knowles last reported holding, valued at $17.62, the price Common Stock was last bought or sold at on the open market here, on 26 May 2026.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Cooper Steve D
10% owner
$26.06K (1)
$4.49M (33)
−$4.47M
10,884,896
$191.79M
−8.8%
Reardon James M
VP of Sales
—
$1.05M (12)
−$1.05M
1,019,312
$17.96M
+1,489%
POTASHNER KENNETH F
Director
—
$283.77K (2)
−$283.77K
398,601
$7.02M
+785.8%
Ison James
CPO
—
$175.43K (4)
−$175.43K
427,695
$7.54M
+221.4%
Manko Joseph M. Jr.
Director
$146.75K (2)
—
+$146.75K
1,195,899
$21.07M
+8.7%
BASSETT DAVID GEORGE
Director
—
$141.12K (1)
−$141.12K
24,984
$440.22K
—
RAUN DAVID
Director
$139.83K (24)
—
+$139.83K
583,556
$10.28M
+269.4%
Matz Gregory W
Director
$10.13K (2)
$140.16K (1)
−$130.04K
81,414
$1.43M
+3,157%
REARDON JOHN RALPH
Director
—
$114.59K (9)
−$114.59K
392,965
$6.92M
+2.4%
Herbets Mitchell H
Director
—
$88.10K (1)
−$88.10K
48,984
$863.10K
—
Lowman Teresita M.
Director
$11.82K (1)
—
+$11.82K
29,930
$527.37K
—
Harrison Jack
Director
$11.35K (1)
—
+$11.35K
92,435
$1.63M
+342.2%
Messinger Gioia
Director
$7.56K (2)
—
+$7.56K
49,690
$875.54K
—
KNOWLES MICHAEL
Chief Executive Officer
$2.03K (1)
—
+$2.03K
590,141
$10.40M
—
JONES RANDY G
Director
—
—
—
1,271,249
$22.40M
+0.6%
Morrison John W Jr.
Chief Financial Officer
—
—
—
305,381
$5.38M
—
Bressner Josef
Managing Director, Bressner
—
—
—
216,260
$3.81M
+103.1%
Carpenter William
Director
—
—
—
199,236
$3.51M
+11.7%
Gabel Daniel G.
Chief Financial Officer
—
—
—
150,064
$2.64M
—
Dumont Michael J.
Director
—
—
—
119,833
$2.11M
+82.0%
Sentovich Kimberly C.
Director
—
—
—
39,266
$691.87K
—

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.

Individual transactions

63
Insider
Date
Role
Action
Shares
Price
Amount
Herbets Mitchell H
26 May 2026
Director
Sell
5,000
$17.62
$88.10K
Matz Gregory W
26 May 2026
Director
Sell
8,000
$17.52
$140.16K
BASSETT DAVID GEORGE
26 May 2026
Director
Sell
8,000
$17.64
$141.12K
Cooper Steve D
22 Jan 2024
10% owner
Sell indirect
206,040
$1.81
$372.93K
Cooper Steve D
31 Jul 2023
10% owner
Sell indirect
203,591
$2.80
$570.05K
Cooper Steve D
21 Apr 2023
10% owner
Sell indirect
203,591
$2.32
$472.78K
Cooper Steve D
20 Dec 2022
10% owner
Sell indirect
200,324
$2.70
$540.87K
Cooper Steve D
25 Aug 2022
10% owner
Sell indirect
21
$4.05
$85.05
Cooper Steve D
15 Aug 2022
10% owner
Sell indirect
2,898
$4.05
$11.74K
Cooper Steve D
22 Jul 2022
10% owner
Sell indirect
2,210
$3.95
$8.73K
Cooper Steve D
21 Jul 2022
10% owner
Sell indirect
1,914
$3.95
$7.56K
Cooper Steve D
20 Jul 2022
10% owner
Sell indirect
10,076
$3.95
$39.80K
Cooper Steve D
11 Apr 2022
10% owner
Sell indirect
30,000
$4.71
$141.30K
Cooper Steve D
8 Apr 2022
10% owner
Sell indirect
47,900
$4.16
$199.26K
Cooper Steve D
29 Mar 2022
10% owner
Sell indirect
2,100
$4.12
$8.65K
Cooper Steve D
31 Dec 2021
10% owner
Sell indirect
10,000
$5.15
$51.50K
Cooper Steve D
24 Nov 2021
10% owner
Sell indirect
10,000
$5.40
$54.00K
Cooper Steve D
23 Nov 2021
10% owner
Sell indirect
10,000
$5.30
$53.00K
Cooper Steve D
2 Nov 2021
10% owner
Sell indirect
8,254
$5.25
$43.33K
Cooper Steve D
27 Sep 2021
10% owner
Sell indirect
1,746
$5.25
$9.17K
Cooper Steve D
10 Sep 2021
10% owner
Sell indirect
10,000
$5.83
$58.30K
Cooper Steve D
8 Sep 2021
10% owner
Sell indirect
2,988
$6.10
$18.23K
Cooper Steve D
7 Sep 2021
10% owner
Sell indirect
1,030
$6.10
$6.28K
Cooper Steve D
3 Sep 2021
10% owner
Sell indirect
30,000
$6.10
$183.00K
Cooper Steve D
2 Sep 2021
10% owner
Sell indirect
20,000
$5.93
$118.60K
Cooper Steve D
27 Aug 2021
10% owner
Sell indirect
50,000
$5.66
$283.00K
Cooper Steve D
10 Aug 2021
10% owner
Sell indirect
4,420
$6.25
$27.63K
Cooper Steve D
9 Aug 2021
10% owner
Sell indirect
49,527
$6.21
$307.56K
Cooper Steve D
6 Aug 2021
10% owner
Sell indirect
473
$6.05
$2.86K
Reardon James M
31 Mar 2021
VP of Sales
Sell
60,000
$6.02
$361.20K
Reardon James M
30 Mar 2021
VP of Sales
Sell
40,000
$5.69
$227.60K
POTASHNER KENNETH F
8 Feb 2021
Director
Sell
21,753
$6.07
$132.04K
POTASHNER KENNETH F
14 Jan 2021
Director
Sell
32,630
$4.65
$151.73K
Cooper Steve D
2 Sep 2020
10% owner
Sell indirect
10,000
$2.72
$27.20K
Cooper Steve D
31 Aug 2020
10% owner
Sell indirect
10,000
$2.60
$26.00K
Reardon James M
25 Aug 2020
President, CDI
Sell
61,723
$2.59
$159.86K
Cooper Steve D
25 Aug 2020
10% owner
Sell indirect
27,750
$2.70
$74.93K
Reardon James M
24 Aug 2020
President, CDI
Sell
11,942
$2.47
$29.50K
Reardon James M
21 Aug 2020
President, CDI
Sell
6,954
$2.51
$17.45K
Reardon James M
20 Aug 2020
President, CDI
Sell
18,537
$2.51
$46.53K
Cooper Steve D
20 Aug 2020
10% owner
Sell indirect
12,250
$2.52
$30.87K
Reardon James M
19 Aug 2020
President, CDI
Sell
844
$2.35
$1.98K
Reardon James M
22 Jun 2020
President, CDI
Sell
20,000
$2.11
$42.21K
Cooper Steve D
22 Jun 2020
10% owner
Sell indirect
78,339
$2.32
$181.75K
Reardon James M
19 Jun 2020
President, CDI
Sell
3,519
$2.00
$7.04K
Cooper Steve D
19 Jun 2020
10% owner
Sell indirect
31,661
$1.95
$61.74K
Reardon James M
16 Jun 2020
President, CDI
Sell
731
$2.00
$1.46K
Reardon James M
15 Jun 2020
President, CDI
Sell
25,750
$1.99
$51.17K
REARDON JOHN RALPH
16 Dec 2019
Director
Sell indirect
82
$1.80
$147.60
REARDON JOHN RALPH
16 Dec 2019
Director
Sell indirect
191
$1.77
$338.07
REARDON JOHN RALPH
12 Dec 2019
Director
Sell indirect
1,000
$1.77
$1.77K
REARDON JOHN RALPH
12 Dec 2019
Director
Sell indirect
720
$1.76
$1.27K
REARDON JOHN RALPH
6 Sep 2019
Director
Sell indirect
10,000
$2.46
$24.60K
REARDON JOHN RALPH
5 Sep 2019
Director
Sell indirect
10,000
$2.38
$23.80K
Reardon James M
12 Aug 2019
President, CDI
Sell
64,132
$1.69
$108.17K
Ison James
29 Mar 2019
Vice President of Sales
Sell
9,201
$2.07
$19.05K
Ison James
14 Dec 2018
Vice President of Sales
Sell
33,056
$2.24
$74.05K
Ison James
13 Dec 2018
Vice President of Sales
Sell
3,066
$2.65
$8.12K
REARDON JOHN RALPH
13 Dec 2018
Director
Sell indirect
4,610
$2.83
$13.05K
Ison James
12 Dec 2018
Vice President of Sales
Sell
27,901
$2.66
$74.22K
REARDON JOHN RALPH
10 Dec 2018
Director
Sell indirect
7,500
$2.83
$21.23K
REARDON JOHN RALPH
7 Dec 2018
Director
Sell indirect
10,000
$2.84
$28.40K
Cooper Steve D
9 Feb 2018
President, CEO
Sell indirect
100,000
$5.00
$500.00K
Show all 127 transactions →

What was left out

Form 4 filings counted 284
Amendments (4/A) skipped 2
Filings about a different issuer 0
Unreadable filings 0
Joint filings 12
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 63
Transactions with no price 0
Shares from compensation/vesting 5,974,820
Sales filed before the plan box existed 57
History held since 9 Feb 2018