# EDGAR Filing Document

**Accession Number:** 0001755059
**File Stem:** 0000950170-25-112624
**Filing Date:** 2025-9
**Character Count:** 8549
**Document Hash:** 3047e5d93ef3a768218a7b5472842686
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950170-25-112624.hdr.sgml**: 20250902

**ACCESSION NUMBER**: 0000950170-25-112624

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250207

**FILED AS OF DATE**: 20250902

**DATE AS OF CHANGE**: 20250902

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KNOWLES MICHAEL
- **CENTRAL INDEX KEY:** 0001755059

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38371
- **FILM NUMBER:** 251287334

**MAIL ADDRESS:**
- **STREET 1:** 9333 BALBOA AVENUE
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92123
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ONE STOP SYSTEMS, INC.
- **CENTRAL INDEX KEY:** 0001394056
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRONIC COMPUTERS [3571]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 330885351
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2235 ENTERPRISE ST STE 110
- **CITY:** ESCONDIDO
- **STATE:** CA
- **ZIP:** 92029
- **BUSINESS PHONE:** 760-745-9883

**MAIL ADDRESS:**
- **STREET 1:** 2235 ENTERPRISE ST STE 110
- **CITY:** ESCONDIDO
- **STATE:** CA
- **ZIP:** 92029

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ONE STOP SYSTEMS INC
- **DATE OF NAME CHANGE:** 20070322

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KNOWLES MICHAEL<br><sub>(Last) (First) (Middle)</sub><br>2235 ENTERPRISE STREET, SUITE 110<br><sub>(Street)</sub><br>ESCONDIDO, CA 92029<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-02-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ONE STOP SYSTEMS, INC. [ OSS ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-02-07 |  | A |  | 131448<sup>(1)</sup> | A | $4.06 | 608453<sup>(2)</sup> | D |  |
| Common Stock | 2025-02-20 |  | F |  | 16800<sup>(3)</sup> | D | $3.76 | 591653<sup>(4)</sup> | D |  |
| Common Stock | 2025-05-21 |  | A |  | 21000<sup>(5)</sup> | A | $0 | 612653<sup>(6)</sup> | D |  |
| Common Stock | 2025-06-05 |  | F |  | 19075<sup>(7)</sup> | D | $3.06 | 593578<sup>(8)</sup> | D |  |
| Common Stock | 2025-08-20 |  | F |  | 8359<sup>(9)</sup> | D | $5.26 | 585219<sup>(10)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Represents 131,448 restricted stock units granted to the Reporting Person under the Company's 2017 Equity Incentive Plan (the "Plan") in connection with the Reporting Person's ongoing service of the executive management team.

(2) Includes 512,898 unvested restriced stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.

(3) The Reporting Person forfeited 16,800 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 June 6, 2023.

(4) Includes 469,082 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.

(5) Represents 21,000 restricted stock units granted to the Reporting Person under the Company's 2017 Equity Incentive Plan (the "Plan") in connection with the Reporting Person's ongoing service of the executive management team.

(6) Includes 490,082 unvested restriced stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.

(7) 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.

(8) Includes 440,082 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.

(9) The Reporting Person forfeited 8,359 shares of common stock upon conversion of an aggregate 21,909 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.

(10) Includes 418,173 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.

**Signature:** /s/ Michael Knowles  
**Date:** 2025-08-22

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**