Michael J. Dumont - 20 May 2026 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Reporting relationship: Director
Issuer ticker: OSS
Reported as of: 20 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 May 2026, 17:19:36 UTC
Prior SEC filing: 27 May 2025
Source filing: View source filing
Reporting owner signature: /s/ Michael Dumont

Key filing fact

Michael J. Dumont filed Form 4 for ONE STOP SYSTEMS, INC. (OSS) on 26 May 2026.

Key facts

This page summarizes Michael J. Dumont's Form 4 filing for ONE STOP SYSTEMS, INC. (OSS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 17:19.

Change

Previous filing in this sequence was filed on 27 May 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001994330 Primary reporting owner

Dumont Michael J.

Relationship: Director
Address: 2235 ENTERPRISE STREET, SUITE 110, ESCONDIDO
Signature: /s/ Michael Dumont
Signature date: 26 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OSS transaction

Common Stock

Award

Transaction value
Shares: +11,984
Change %: +11%
Price: $0.000000^*
Shares after: 119,833
Date: 20 May 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Represents 11,984 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.

Footnote F2

Includes 11,984 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions and 107,849 shares of common stock.