KNOWLES MICHAEL 4

What Happened
Michael Knowles, CEO of ONE Stop Systems, forfeited shares to satisfy tax withholding when vested restricted stock units (RSUs) converted into common stock. On Feb 7, 2026 he had 13,298 shares withheld at $9.24 each ($122,874) and on Feb 15, 2026 he had 6,650 shares withheld at $8.70 each ($57,855). Combined, 19,948 shares were forfeited for approximately $180,729. These were withholding/share-forfeiture transactions tied to vested RSU conversions (not open-market sales).

Key Details

• Transaction dates and amounts:
  • 2026-02-07: 13,298 shares forfeited at $9.24 — $122,874 (Footnote F1)
  • 2026-02-15: 6,650 shares forfeited at $8.70 — $57,855 (Footnote F3)
  • Total forfeited: 19,948 shares for ~$180,729
• Shares owned after transaction: not specified in the provided filing excerpt.
• Footnotes:
  • F1/F3: Shares were forfeited to cover tax withholdings upon conversion of vested RSUs (grants referenced from Feb 7, 2025 and July 1, 2024).
  • F2/F4: Filing references substantial remaining unvested RSU balances (e.g., 426,219 and 404,311 unvested RSUs), which remain subject to vesting conditions.
• Filing timeliness: Form 4 was filed March 2, 2026. The Feb 7 and Feb 15 transactions were reported later than the typical two-business-day Form 4 deadline.

Context
These transactions are coded F (tax withholding/forfeiture). That means shares were withheld to satisfy taxes on RSU vesting — a routine administrative action rather than an open-market sale or purchase. For retail investors, withholding forfeitures generally do not signal CEO buying/selling intent; they reflect compensation tax mechanics.