7 insiders reported 39 Form 4 transactions for ONE STOP SYSTEMS, INC. (OSS) over the past 18 months (most recent 2026-09-04). Recent activity: KNOWLES MICHAEL (Chief Executive Officer) Sell 8,621 shares, Gabel Daniel G. (Chief Financial Officer) Sell 3,832 shares, KNOWLES MICHAEL (Chief Executive Officer) Sell 8,621 shares, KNOWLES MICHAEL (Chief Executive Officer) Sell 19,675 shares, Gabel Daniel G. (Chief Financial Officer) Sell 1,613 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-04 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 8,621 | $114,832 |
| 2026-09-04 | Gabel Daniel G. | Chief Financial Officer | Sell | 3,832 | $51,042 |
| 2026-09-04 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 8,621 | $117,332 |
| 2026-06-12 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 19,675 | $332,311 |
| 2026-05-28 | Gabel Daniel G. | Chief Financial Officer | Sell | 1,613 | $25,292 |
| 2026-05-26 | Matz Gregory W | Director | Buy | 11,984 | $0 |
| 2026-05-26 | Matz Gregory W | Director | Sell | 8,000 | $140,160 |
| 2026-05-26 | Dumont Michael J. | Director | Buy | 11,984 | $0 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Buy | 21,000 | $0 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Buy | 11,984 | $0 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Sell | 8,000 | $141,120 |
| 2026-05-26 | Herbets Mitchell H | Director | Buy | 11,984 | $0 |
| 2026-05-26 | Herbets Mitchell H | Director | Sell | 5,000 | $88,100 |
| 2026-03-27 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 0 | $0 |
| 2026-03-02 | Ison James | CPO | Buy | 34,313 | $0 |
| 2026-03-02 | Ison James | CPO | Sell | 6,546 | $60,485 |
| 2026-03-02 | Ison James | CPO | Sell | 8,213 | $0 |
| 2026-03-02 | Ison James | CPO | Buy | 8,213 | $0 |
| 2026-03-02 | Ison James | CPO | Sell | 3,120 | $27,144 |
| 2026-03-02 | Ison James | CPO | Sell | 4,263 | $0 |
| 2026-03-02 | Ison James | CPO | Buy | 4,263 | $0 |
| 2026-03-02 | Gabel Daniel G. | Chief Financial Officer | Sell | 7,799 | $72,063 |
| 2026-03-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 13,298 | $122,874 |
| 2026-03-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 6,650 | $57,855 |
| 2026-02-11 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 101,862 | $0 |
Source: SEC Form 4 filings · as of 2026-09-04