6 insiders reported 32 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, KNOWLES MICHAEL (Chief Executive Officer) Buy 0 shares, KNOWLES MICHAEL (Chief Executive Officer) Sell 6,650 shares, Ison James (CPO) Sell 6,546 shares, Ison James (CPO) Sell 8,213 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-12 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 19,675 | $332,311 |
| 2026-03-27 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 0 | $0 |
| 2026-03-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 6,650 | $57,855 |
| 2026-03-02 | Ison James | CPO | Sell | 6,546 | $60,485 |
| 2026-03-02 | 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 | Ison James | CPO | Buy | 34,313 | $0 |
| 2026-02-11 | Gabel Daniel G. | Chief Financial Officer | Buy | 55,239 | $0 |
| 2026-02-11 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 101,862 | $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 |
| 2025-09-02 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 131,448 | $533,679 |
| 2025-09-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 16,800 | $63,168 |
| 2025-09-02 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 21,000 | $0 |
| 2025-09-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 19,075 | $58,370 |
| 2025-09-02 | KNOWLES MICHAEL | Chief Executive Officer | Sell | 8,359 | $43,968 |
| 2025-08-25 | Ison James | CPO | Sell | 3,113 | $16,374 |
| 2025-08-25 | Ison James | CPO | Sell | 4,271 | $0 |
| 2025-08-25 | Ison James | CPO | Buy | 4,271 | $0 |
| 2025-05-28 | Herbets Mitchell H | Director | Buy | 21,000 | $0 |
Source: SEC Form 4 filings · as of 2026-06-12