One Stop Systems's top three insider shareholders as of August 04, 2026 are Steve D Cooper (TenPercentOwner, 1.92Mn shares), Joseph M. Jr. Manko (Director, 1.17Mn shares), Michael Knowles (Chief Executive Officer, 648.06K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Steve D Cooper | TenPercentOwner | 0 | 1,923,572 | 1,923,572 | 33.9% | 24 Jan, 2024 |
| 2 | Joseph M. Jr. Manko | Director | 0 | 1,174,899 | 1,174,899 | 20.7% | 15 Aug, 2024 |
| 3 | Michael Knowles | Chief Executive Officer | 648,058 | 0 | 648,058 | 11.4% | 24 Feb, 2026 |
| 4 | James Ison | Cpo | 141,907 | 445,549 | 587,456 | 10.4% | 24 Feb, 2026 |
| 5 | David Raun | President And Ceo | 583,556 | 0 | 583,556 | 10.3% | 03 Apr, 2024 |
| 6 | John W Jr. Morrison | Chief Financial Officer | 305,381 | 0 | 305,381 | 5.4% | 25 Sep, 2024 |
| 7 | Daniel G. Gabel | Chief Financial Officer | 155,509 | 0 | 155,509 | 2.7% | 24 Feb, 2026 |
| 8 | Gregory W Matz | Director | 74,930 | 0 | 74,930 | 1.3% | 23 May, 2025 |
| 9 | Jack Harrison | Director | 71,984 | 0 | 71,984 | 1.3% | 21 Mar, 2022 |
| 10 | Gioia Messinger | Director | 49,690 | 0 | 49,690 | 0.9% | 03 Jul, 2024 |
| 11 | Mitchell H Herbets | Director | 42,000 | 0 | 42,000 | 0.7% | 27 May, 2025 |
| 12 | Teresita M. Lowman | Director | 29,930 | 0 | 29,930 | 0.5% | 21 Mar, 2022 |
| 13 | Michael J. Dumont | Director | 21,000 | 0 | 21,000 | 0.4% | 23 May, 2025 |
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 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 |
| 07 Feb, 2026 | Michael Knowles | Chief Executive Officer | Acquired A | 101,862 | $0.00 | $0 | 668,006 | Direct |
| 07 Feb, 2026 | Daniel G. Gabel | Chief Financial Officer | Acquired A | 55,239 | $0.00 | $0 | 163,308 | Direct |
| 31 Dec, 2025 | Michael Knowles | Chief Executive Officer | Disposed F | 19,075 | $7.18 | $136.96K | 566,144 | Direct |
| 31 Dec, 2025 | Daniel G. Gabel | Chief Financial Officer | Disposed F | 3,215 | $7.18 | $23.08K | 108,069 | Direct |
| 20 Aug, 2025 | James Ison | Cpo | Disposed F | 3,113 | $5.26 | $16.37K | 125,794 | Direct |
| 20 Aug, 2025 | James Ison | Cpo | Disposed G | 4,271 | $0.00 | $0 | 121,523 | Direct |
| 20 Aug, 2025 | James Ison | Cpo | Acquired G | 4,271 | $0.00 | $0 | 218,672 | Indirect |
| 21 May, 2025 | Mitchell H Herbets | Director | Acquired A | 21,000 | $0.00 | $0 | 42,000 | Direct |
| 21 May, 2025 | Michael J. Dumont | Director | Acquired F | 21,000 | $0.00 | $0 | 21,000 | Direct |
| 21 May, 2025 | Gregory W Matz | Director | Acquired A | 21,000 | $0.00 | $0 | 74,930 | Direct |