ONE STOP SYSTEMS INC (OSS) — insider trading
Information Technology · NASDAQ
ONE STOP SYSTEMS INC (OSS) has 26 reported SEC Form 4 insider transactions in our data, including 3 open-market sales among the most recent 26 (latest 2026-08-15).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-15 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 8,621 | $13.61 | $117.3K | Form 4 |
| 2026-08-07 | Gabel Daniel G. | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 3,832 | $13.32 | $51.0K | Form 4 |
| 2026-08-07 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 8,621 | $13.32 | $114.8K | Form 4 |
| 2026-06-05 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 19,675 | $16.89 | $332.3K | Form 4 |
| 2026-05-26 | Herbets Mitchell H | Director | Open-market sale | 5,000 | $17.62 | $88.1K | Form 4 |
| 2026-05-26 | Matz Gregory W | Director | Open-market sale | 8,000 | $17.52 | $140.2K | Form 4 |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Open-market sale | 8,000 | $17.64 | $141.1K | Form 4 |
| 2026-05-20 | Herbets Mitchell H | Director | Grant / award / vesting | 11,984 | — | $0 | Form 4 |
| 2026-05-20 | Dumont Michael J. | Director | Grant / award / vesting | 11,984 | — | $0 | Form 4 |
| 2026-05-20 | Matz Gregory W | Director | Grant / award / vesting | 11,984 | — | $0 | Form 4 |
| 2026-05-20 | BASSETT DAVID GEORGE | Director | Grant / award / vesting | 11,984 | — | $0 | Form 4 |
| 2026-05-11 | Gabel Daniel G. | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 1,613 | $15.68 | $25.3K | Form 4 |
| 2026-02-15 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 6,650 | $8.70 | $57.9K | Form 4 |
| 2026-02-15 | Ison James | Officer (CPO) | Bona fide gift | 4,263 | — | $0 | Form 4 |
| 2026-02-15 | Ison James | Officer (CPO) | Bona fide gift | 4,263 | — | $0 | Form 4 |
| 2026-02-15 | Ison James | Officer (CPO) | Shares withheld for taxes / exercise cost | 3,120 | $8.70 | $27.1K | Form 4 |
| 2026-02-07 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 13,298 | $9.24 | $122.9K | Form 4 |
| 2026-02-07 | Gabel Daniel G. | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 7,799 | $9.24 | $72.1K | Form 4 |
| 2026-02-07 | Ison James | Officer (CPO) | Bona fide gift | 8,213 | — | $0 | Form 4 |
| 2026-02-07 | Ison James | Officer (CPO) | Bona fide gift | 8,213 | — | $0 | Form 4 |
| 2026-02-07 | Ison James | Officer (CPO) | Shares withheld for taxes / exercise cost | 6,546 | $9.24 | $60.5K | Form 4 |
| 2026-02-07 | Ison James | Officer (CPO) | Grant / award / vesting | 34,313 | — | $0 | Form 4 |
| 2026-02-07 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Grant / award / vesting | 101,862 | — | $0 | Form 4 |
| 2026-02-07 | Gabel Daniel G. | Officer (Chief Financial Officer) | Grant / award / vesting | 55,239 | — | $0 | Form 4 |
| 2025-05-21 | BASSETT DAVID GEORGE | Director | Grant / award / vesting | 21,000 | — | $0 | Form 4 |
| 2025-05-21 | KNOWLES MICHAEL | Director, Officer (Chief Executive Officer) | Grant / award / vesting | 0 | — | $0 | Form 4/A |
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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: ONE STOP SYSTEMS INC (OSS).
Last updated 2026-08-15 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.