As of September 29, 2026, One Stop Systems's top three insider holders are Steve D Cooper (TenPercentOwner, 1.92Mn shares), Joseph M. Jr. Manko (Director, 1.17Mn shares), Michael Knowles (Chief Executive Officer, 590.14K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Steve D Cooper | TenPercentOwner | 0 | 1,923,572 | 1,923,572 | 31.3% | 24 Jan, 2024 |
| 2 | Joseph M. Jr. Manko | Director | 0 | 1,174,899 | 1,174,899 | 19.1% | 15 Aug, 2024 |
| 3 | Michael Knowles | Chief Executive Officer | 590,141 | 0 | 590,141 | 9.6% | 04 Sep, 2026 |
| 4 | James Ison | Cpo | 141,907 | 445,549 | 587,456 | 9.5% | 24 Feb, 2026 |
| 5 | David Raun | President And Ceo | 583,556 | 0 | 583,556 | 9.5% | 03 Apr, 2024 |
| 6 | Kenneth F Potashner | Director | 398,601 | 0 | 398,601 | 6.5% | 11 Jul, 2024 |
| 7 | John W Jr. Morrison | Chief Financial Officer | 305,381 | 0 | 305,381 | 5.0% | 25 Sep, 2024 |
| 8 | Daniel G. Gabel | Chief Financial Officer | 150,064 | 0 | 150,064 | 2.4% | 04 Sep, 2026 |
| 9 | Michael J. Dumont | Director | 119,833 | 0 | 119,833 | 1.9% | 26 May, 2026 |
| 10 | Gregory W Matz | Director | 78,914 | 0 | 78,914 | 1.3% | 26 May, 2026 |
| 11 | Jack Harrison | Director | 71,984 | 0 | 71,984 | 1.2% | 21 Mar, 2022 |
| 12 | Gioia Messinger | Director | 49,690 | 0 | 49,690 | 0.8% | 03 Jul, 2024 |
| 13 | Mitchell H Herbets | Director | 48,984 | 0 | 48,984 | 0.8% | 26 May, 2026 |
| 14 | Kimberly C. Sentovich | Director | 39,266 | 0 | 39,266 | 0.6% | 21 Mar, 2022 |
| 15 | Teresita M. Lowman | Director | 29,930 | 0 | 29,930 | 0.5% | 21 Mar, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2026 | Michael Knowles | Chief Executive Officer | Disposed F | 8,621 | $13.32 | $114.83K | 598,762 | Direct |
| 07 Aug, 2026 | Daniel G. Gabel | Chief Financial Officer | Disposed F | 3,832 | $13.32 | $51.04K | 150,064 | Direct |
| 15 Aug, 2026 | Michael Knowles | Chief Executive Officer | Disposed F | 8,621 | $13.61 | $117.33K | 590,141 | Direct |
| 05 Jun, 2026 | Michael Knowles | Chief Executive Officer | Disposed F | 19,675 | $16.89 | $332.31K | 607,383 | Direct |
| 11 May, 2026 | Daniel G. Gabel | Chief Financial Officer | Disposed F | 1,613 | $15.68 | $25.29K | 153,896 | Direct |
| 20 May, 2026 | Mitchell H Herbets | Director | Acquired A | 11,984 | $0.00 | $0 | 53,984 | Direct |
| 20 May, 2026 | Michael J. Dumont | Director | Acquired A | 11,984 | $0.00 | $0 | 119,833 | Direct |
| 20 May, 2026 | Gregory W Matz | Director | Acquired A | 11,984 | $0.00 | $0 | 86,914 | Direct |
| 26 May, 2026 | Mitchell H Herbets | Director | Disposed S | 5,000 | $17.62 | $88.10K | 48,984 | Direct |
| 26 May, 2026 | Gregory W Matz | Director | Disposed S | 8,000 | $17.52 | $140.16K | 78,914 | Direct |
| 07 Feb, 2026 | Michael Knowles | Chief Executive Officer | Disposed F | 13,298 | $9.24 | $122.87K | 654,708 | Direct |
| 07 Feb, 2026 | James Ison | Cpo | Acquired A | 34,313 | $0.00 | $0 | 155,836 | Direct |
| 07 Feb, 2026 | Daniel G. Gabel | Chief Financial Officer | Disposed F | 7,799 | $9.24 | $72.06K | 155,509 | Direct |
| 07 Feb, 2026 | James Ison | Cpo | Disposed F | 6,546 | $9.24 | $60.49K | 149,290 | Direct |
| 15 Feb, 2026 | Michael Knowles | Chief Executive Officer | Disposed F | 6,650 | $8.70 | $57.85K | 648,058 | Direct |
| 07 Feb, 2026 | James Ison | Cpo | Disposed G | 8,213 | $0.00 | $0 | 141,077 | Direct |
| 07 Feb, 2026 | James Ison | Cpo | Acquired G | 8,213 | $0.00 | $0 | 226,885 | Indirect |
| 15 Feb, 2026 | James Ison | Cpo | Disposed F | 3,120 | $8.70 | $27.14K | 146,170 | Direct |
| 15 Feb, 2026 | James Ison | Cpo | Disposed G | 4,263 | $0.00 | $0 | 141,907 | Direct |
| 15 Feb, 2026 | James Ison | Cpo | Acquired G | 4,263 | $0.00 | $0 | 231,148 | Indirect |