ONE STOP SYSTEMS, INC. — Director's Dealing 2025

May 23, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ONE STOP SYSTEMS, INC. (OSS)
CIK: 0001394056
Period of Report: 2025-05-21

Reporting Person: Matz Gregory W (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-21	Common Stock	A	21000	—	Acquired	74930	Direct

Footnotes

F1: Represents 21,000 restricted stock units granted to the Reporting Person under the Issuer's 2017 Equity Incentive Plan, as amended (the "Plan"), in connection with the Reporting Person's service as a director of the Issuer, which restricted stock units are subject to vesting conditions.

F2: Includes 21,000 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions and 53,930 shares of common stock.