Michael Knowles - 05 Jun 2026 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: OSS
Reported as of: 05 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 12 Jun 2026, 17:21:11 UTC
Prior SEC filing: 11 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael Knowles

Key filing fact

Michael Knowles filed Form 4 for ONE STOP SYSTEMS, INC. (OSS) on 12 Jun 2026.

Key facts

This page summarizes Michael Knowles's Form 4 filing for ONE STOP SYSTEMS, INC. (OSS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 12 Jun 2026, 17:21.

Change

Previous filing in this sequence was filed on 11 Feb 2026.
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 0001755059 Primary reporting owner

KNOWLES MICHAEL

Relationship: Chief Executive Officer, Director
Address: 2235 ENTERPRISE STREET, SUITE 110, ESCONDIDO
Signature: /s/ Michael Knowles
Signature date: 12 Jun 2026

Reported non-derivative transactions

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

OSS transaction

Common Stock

Tax liability

Transaction value
Shares: -19,675
Change %: -3.1%
Price: $16.89^*
Shares after: 607,383
Date: 05 Jun 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

The Reporting Person forfeited 19,675 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.

Footnote F2

Includes 333,311 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.