Michael Knowles - 07 Feb 2026 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Signature
/s/ Michael Knowles
Issuer symbol
OSS
Transactions as of
07 Feb 2026
Net transactions value
-$180,729
Form type
4
Filing time
02 Mar 2026, 13:52:51 UTC
Previous filing
07 Jan 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
KNOWLES MICHAEL Chief Executive Officer, Director 2235 ENTERPRISE STREET, SUITE 110, ESCONDIDO /s/ Michael Knowles 24 Feb 2026 0001755059

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OSS Common Stock Tax liability $122,874 -13,298 -2% $9.24 654,708 07 Feb 2026 Direct F1, F2
transaction OSS Common Stock Tax liability $57,855 -6,650 -1% $8.70 648,058 15 Feb 2026 Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The Reporting Person forfeited 13,298 shares of common stock upon conversion of an aggregate 43,816 vested and outstanding restricted stock units into shares of common stock to cover tax withholdings, using the market price of the issuer's common stock at the time of forfeiture. These restricted stock units were part of the grant reported in Table I of the Form 4 filed by the Reporting Person with the Securities and Exchange Commission on February 7, 2025.
F2 Includes 426,219 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
F3 The Reporting Person forfeited 6,650 shares of common stock upon conversion of an aggregate 21,908 vested and outstanding restricted stock units into shares of common stock to cover tax withholdings, using the market price of the issuer's common stock at the time of forfeiture. These restricted stock units were part of the grant reported in Table I of the Form 4 filed by the Reporting Person with the Securities and Exchange Commission on July 1, 2024.
F4 Includes 404,311 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.