7 insiders reported 40 Form 4 transactions for ONE STOP SYSTEMS, INC. (OSS) over the past 18 months (most recent 2026-06-12). Recent activity: KNOWLES MICHAEL (Chief Executive Officer) Sell 19,675 shares, Gabel Daniel G. (Chief Financial Officer) Sell 1,613 shares, Dumont Michael J. (Director) Buy 11,984 shares, Herbets Mitchell H (Director) Buy 11,984 shares, BASSETT DAVID GEORGE (Director) Buy 21,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 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 | Dumont Michael J. | Director | Buy | 11,984 | $0 |
| 2026-05-26 | Herbets Mitchell H | Director | Buy | 11,984 | $0 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Buy | 21,000 | $0 |
| 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 | Herbets Mitchell H | Director | Sell | 5,000 | $88,100 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Buy | 11,984 | $0 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Sell | 8,000 | $141,120 |
| 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 | 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 |
| 2026-03-02 | Ison James | CPO | Sell | 6,546 | $60,485 |
| 2026-02-11 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 101,862 | $0 |
| 2026-02-11 | Gabel Daniel G. | Chief Financial Officer | Buy | 55,239 | $0 |
| 2026-01-12 | Gabel Daniel G. | Chief Financial Officer | Sell | 3,215 | $23,084 |
| 2026-01-07 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 19,075 | $136,958 |
Source: SEC Form 4 filings · as of 2026-06-12