Nasdaq · CIK 0001394056
OSS ONE STOP SYSTEMS, INC.
Insider trading from SEC Form 4. Last filing 39 d ago. Close $7.74 on Oct 9, 2026, +78% from the 52-week low and -61% from the high.
In brief
ONE STOP SYSTEMS, INC. (OSS) has 27 SEC Form 4 filings on file from 7 insiders, the latest filed on Sep 4, 2026. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.
3 open-market trades have been scored at OSS. The newest: David George Bassett (director) sold $141k of stock on May 26, 2026, filed May 26, 2026, scored 46 (moderate). 3 insiders sold within 14 days of each other around May 26, 2026.
3 Form 144 notices of planned sales are on file, the latest filed May 26, 2026.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at ONE STOP SYSTEMS, INC., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 46Moderate | David George Bassett director sell | $141k 8,000 shares | -24% | +532% from low-2% from high | |
| 39Weak | Mitchell H Herbets director sell | $88k 5,000 shares | -9% | +532% from low-2% from high | |
| 41Moderate | Gregory W Matz director sell | $140k 8,000 shares | -9% | +532% from low-2% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| May 26, 2026 | BASSETT DAVID GEORGE Director | 8,000 0.03% of outstanding | $143k | May 26, 2026 | none |
| May 26, 2026 | MITCHELL HERBETS Director | 5,000 0.02% of outstanding | $88k | May 26, 2026 | none |
| May 26, 2026 | Matz Gregory W Director | 8,000 0.03% of outstanding | $138k | May 26, 2026 | none |
Transactions
Every row filed, 46 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 7, 2026 | Daniel G. Gabel Chief Financial Officer | FTax withholding Common Stock | -3,832 | $13.32 | $51k | 150,064 | 39 d ago |
| Aug 7, 2026 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -8,621 | $13.32 | $115k | 598,762 | 39 d ago |
| Aug 15, 2026 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -8,621 | $13.61 | $117k | 590,141 | 39 d ago |
| Jun 5, 2026 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -19,675 | $16.89 | $332k | 607,383 | Jun 12, 2026 |
| May 11, 2026 | Daniel G. Gabel Chief Financial Officer | FTax withholding Common Stock | -1,613 | $15.68 | $25k | 153,896 | May 28, 2026 |
| May 20, 2026 | Michael J. Dumont director | AGrant or award Common Stock | +11,984 | $0.00 | $0 | 119,833 | May 26, 2026 |
| May 21, 2025 | David George Bassett director | AGrant or award Common Stock | +21,000 | $0.00 | $0 | 21,000 | May 26, 2026 |
| May 20, 2026 | Gregory W Matz director | AGrant or award Common Stock | +11,984 | $0.00 | $0 | 86,914 | May 26, 2026 |
| May 20, 2026 | Mitchell H Herbets director | AGrant or award Common Stock | +11,984 | $0.00 | $0 | 53,984 | May 26, 2026 |
| May 20, 2026 | David George Bassett director | AGrant or award Common Stock | +11,984 | $0.00 | $0 | 32,984 | May 26, 2026 |
| May 26, 2026 | Gregory W Matz director | SOpen-market sale Common Stock | -8,000 | $17.52 | $140k | 78,914 | May 26, 2026 |
| May 26, 2026 | Mitchell H Herbets director | SOpen-market sale Common Stock | -5,000 | $17.62 | $88k | 48,984 | May 26, 2026 |
| May 26, 2026 | David George Bassett director | SOpen-market sale Common Stock | -8,000 | $17.64 | $141k | 24,984 | May 26, 2026 |
| May 21, 2025 | Michael Knowles Chief Executive Officer | AGrant or award Common Stock | +0 | $0.00 | $0 | 591,653 | Mar 27, 2026 |
| Feb 7, 2026 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -13,298 | $9.24 | $123k | 654,708 | Mar 2, 2026 |
| Feb 7, 2026 | James Ison CPO | AGrant or award Common Stock | +34,313 | $0.00 | $0 | 155,836 | Mar 2, 2026 |
| Feb 7, 2026 | Daniel G. Gabel Chief Financial Officer | FTax withholding Common Stock | -7,799 | $9.24 | $72k | 155,509 | Mar 2, 2026 |
| Feb 15, 2026 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -6,650 | $8.70 | $58k | 648,058 | Mar 2, 2026 |
| Feb 7, 2026 | James Ison CPO | FTax withholding Common Stock | -6,546 | $9.24 | $60k | 149,290 | Mar 2, 2026 |
| Feb 7, 2026 | James Ison CPO | GGift Common Stock | -8,213 | $0.00 | $0 | 141,077 | Mar 2, 2026 |
| Feb 7, 2026 | James Ison CPO | GGift Common Stockindirect: By Trust | +8,213 | $0.00 | $0 | 226,885 | Mar 2, 2026 |
| Feb 15, 2026 | James Ison CPO | FTax withholding Common Stock | -3,120 | $8.70 | $27k | 146,170 | Mar 2, 2026 |
| Feb 15, 2026 | James Ison CPO | GGift Common Stock | -4,263 | $0.00 | $0 | 141,907 | Mar 2, 2026 |
| Feb 15, 2026 | James Ison CPO | GGift Common Stockindirect: By Trust | +4,263 | $0.00 | $0 | 231,148 | Mar 2, 2026 |
| Feb 7, 2026 | Michael Knowles Chief Executive Officer | AGrant or award Common Stock | +101,862 | $0.00 | $0 | 668,006 | Feb 11, 2026 |
| Feb 7, 2026 | Daniel G. Gabel Chief Financial Officer | AGrant or award Common Stock | +55,239 | $0.00 | $0 | 163,308 | Feb 11, 2026 |
| Dec 31, 2025 | Daniel G. Gabel Chief Financial Officer | FTax withholding Common Stock | -3,215 | $7.18 | $23k | 108,069 | Jan 12, 2026 |
| Dec 31, 2025 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -19,075 | $7.18 | $137k | 566,144 | Jan 7, 2026 |
| Feb 7, 2025 | Michael Knowles Chief Executive Officer | AGrant or award Common Stock | +131,448 | $4.06 | $534k | 608,453 | Sep 2, 2025 |
| Feb 20, 2025 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -16,800 | $3.76 | $63k | 591,653 | Sep 2, 2025 |
| May 21, 2025 | Michael Knowles Chief Executive Officer | AGrant or award Common Stock | +21,000 | $0.00 | $0 | 612,653 | Sep 2, 2025 |
| Jun 5, 2025 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -19,075 | $3.06 | $58k | 593,578 | Sep 2, 2025 |
| Aug 20, 2025 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -8,359 | $5.26 | $44k | 585,219 | Sep 2, 2025 |
| Aug 20, 2025 | James Ison CPO | FTax withholding Common Stock | -3,113 | $5.26 | $16k | 125,794 | Aug 25, 2025 |
| Aug 20, 2025 | James Ison CPO | GGift Common Stock | -4,271 | $0.00 | $0 | 121,523 | Aug 25, 2025 |
| Aug 20, 2025 | James Ison CPO | GGift Common Stockindirect: By Trust | +4,271 | $0.00 | $0 | 218,672 | Aug 25, 2025 |
| May 21, 2025 | Mitchell H Herbets director | AGrant or award Common Stock | +21,000 | $0.00 | $0 | 42,000 | May 28, 2025 |
| May 21, 2025 | Michael J. Dumont director | FTax withholding Common Stock | +21,000 | $0.00 | $0 | 21,000 | May 27, 2025 |
| May 21, 2025 | Gregory W Matz director | AGrant or award Common Stock | +21,000 | $0.00 | $0 | 74,930 | May 23, 2025 |
| Feb 20, 2025 | James Ison CPO | FTax withholding Common Stock | -7,006 | $3.76 | $26k | 136,667 | Mar 13, 2025 |
| Feb 20, 2025 | James Ison CPO | GGift Common Stock | -7,760 | $0.00 | $0 | 128,907 | Mar 13, 2025 |
| Feb 20, 2025 | James Ison CPO | GGift Commonindirect: By Trust | +7,760 | $0.00 | $0 | 214,401 | Mar 13, 2025 |
| Feb 7, 2025 | Daniel G. Gabel Chief Financial Officer | AGrant or award Common Stock | +71,284 | $4.06 | $289k | 111,284 | Mar 5, 2025 |
| Feb 7, 2025 | James Ison CPO | AGrant or award Common Stock | +44,279 | $4.06 | $180k | 135,913 | Feb 24, 2025 |
| Dec 5, 2020 | Michael Knowles Chief Executive Officer | FTax withholding Common Stock | -17,525 | $2.41 | $42k | 477,530 | Dec 30, 2024 |
| Nov 11, 2024 | Daniel G. Gabel Chief Financial Officer | AGrant or award Common Stock | +40,000 | $0.00 | $0 | 40,000 | Nov 12, 2024 |
Insiders
Everyone who has filed a Form 4 here.
- David George Bassettdirector
- Michael J. Dumontdirector
- Daniel G. GabelChief Financial Officer
- Mitchell H Herbetsdirector
- James IsonCPO
- Michael KnowlesChief Executive Officer
- Gregory W Matzdirector
Questions about OSS
Answered from the filings on this page, as of the latest one.
Are insiders buying OSS?
No. In the last 90 days no insider at ONE STOP SYSTEMS, INC. bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.
Who was the last insider to trade OSS on the open market?
David George Bassett (director) sold $141k of OSS on May 26, 2026 and filed the Form 4 on May 26, 2026. InsiderTell scored 46 (moderate), with 3 insiders on the same side within 14 days.
How many insiders file Form 4 at ONE STOP SYSTEMS, INC.?
7 people have filed a Form 4 at ONE STOP SYSTEMS, INC., among them David George Bassett (director), Michael J. Dumont (director), Daniel G. Gabel (Chief Financial Officer). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.