Company profile
One Stop Systems, Inc. Insider Trading
OSSEvery SEC Form 4 insider trading filing for One Stop Systems, Inc. (OSS) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Electronic Computers
- CIK
- 0001394056
- Filings
- 71
- Insiders
- 13
- Last filing
- 2026-06-05
Activity summary
No insider transactions in the last 30 days. The most recent was on June 5, 2026, when Knowles Michael sold 19,675 shares. 71 filings from 13 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. One Stop Systems, Inc. insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $1.0M.
90 day insight
Over the last 90 days, One Stop Systems, Inc. insiders sold $332K across 1 transaction with no open-market purchases.
- Most active insider: Knowles Michael with 1 transaction totaling $332K.
- Largest single sale: $332K by Knowles Michael on Jun 5, 2026.
Activity skews bearish — sales outpace buys.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 5, 2026 | Knowles Michael | OSS | Tax Withholding | 19,675 | $16.89 | $332K |
| May 26, 2026 | Herbets Mitchell H | OSS | Sale | 5,000 | $17.62 | $88K |
| May 26, 2026 | Matz Gregory W | OSS | Sale | 8,000 | $17.52 | $140K |
| May 20, 2026 | Bassett David George | OSS | Award | 11,984 | — | — |
| May 20, 2026 | Dumont Michael J. | OSS | Award | 11,984 | — | — |
45 more transactions hidden
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Query this yourself
The same rows, over the API.
curl "https://api.form4api.com/v1/transactions?ticker=OSS" \
-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of One Stop Systems, Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →