Herbets Mitchell H 4

What Happened Mitchell H. Herbets, a director of One Stop Systems, received a grant of 11,984 restricted stock units (RSUs) on May 20, 2026 (no cash paid). On May 26, 2026 he sold 5,000 shares in an open-market transaction at $17.62 per share, generating $88,100. The sale was made to cover tax withholdings related to the conversion of previously vested RSUs into shares.

Key Details

• Grant: 11,984 RSUs granted on 2026-05-20 under the 2017 Equity Incentive Plan; these RSUs are unvested and subject to vesting conditions (Footnote F1).
• Sale: 5,000 shares sold on 2026-05-26 at $17.62 — proceeds $88,100; sale executed to satisfy tax withholding upon conversion of 21,000 vested RSUs (Footnote F3).
• Holdings after transactions: 37,000 shares of common stock plus 11,984 unvested RSUs remain reported (Footnote F4).
• Filing: Form 4 filed May 26, 2026; transaction reported in the issuer’s Form 4 (timely filing).
• Transaction codes: A = Award/Grant (RSUs); S = Sale (tax withholding/cashless cover) (Footnotes F1–F4).

Context The sale was a tax-withholding transaction tied to RSU conversion (a common administrative action), not an open-market sell-off for investment reasons. The newly granted 11,984 RSUs are unvested and do not represent immediately tradable shares.