Michael Knowles - 31 Dec 2025 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Role
Chief Executive Officer, Director
Signature
/s/ Michael Knowles
Issuer symbol
OSS
Transactions as of
31 Dec 2025
Net transactions value
-$136,958
Form type
4
Filing time
07 Jan 2026, 15:15:34 UTC
Previous filing
02 Sep 2025
Next filing
11 Feb 2026
SEC
View on sec.gov

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 05 Jan 2026 0001755059

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OSS Common Stock Tax liability $136,958 -19,075 -3.3% $7.18 566,144 31 Dec 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The Reporting Person forfeited 19,075 shares of common stock upon conversion of an aggregate 50,000 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 June 6, 2023.
F2 Includes 368,173 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.