FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Ison Jim
  2. Issuer Name and Ticker or Trading Symbol
ONE STOP SYSTEMS, INC. [OSS]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Sales/Marketing Officer
(Last)
(First)
(Middle)
2235 ENTERPRISE STREET #110
3. Date of Earliest Transaction (Month/Day/Year)
02/13/2020
(Street)

ESCONDIDO, CA 92029
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 02/13/2020   F(1)   667 A $ 2.73 14,763 D  
Common Stock 02/13/2020   F(2)   1,211 A $ 2.73 15,974 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Unit (3) 02/13/2020   M     833   (4)   (4) Common Stock 833 $ 0 4,169 D  
Restricted Stock Unit (3) 02/13/2020   M     1,667   (5)   (5) Common Stock 1,667 $ 0 6,666 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Ison Jim
2235 ENTERPRISE STREET #110
ESCONDIDO, CA 92029
      Chief Sales/Marketing Officer  

Signatures

 /s/Jim Ison   02/18/2020
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Represents a "net stock issuance" of vested and outstanding Restricted Stock Units. The reporting person received 667 shares of common stock on the net stock issuance of 833 shares of common stock. The reporting person forfeited 166 shares of common stock underlying the vested and outstanding Restricted Stock Units to cover tax withholdings, using the closing stock price on February 13, 2020 of $2.73.
(2) Represents a "net stock issuance" of vested and outstanding Restricted Stock Units. The reporting person received 1,211 shares of common stock on the net stock issuance of 1,667 shares of common stock. The reporting person forfeited 456 shares of common stock underlying the vested and outstanding Restricted Stock Units to cover tax withholdings, using the closing stock price on February 13, 2020 of $2.73.
(3) Restricted stock units convert into common stock on a one-for-one basis.
(4) On April 11, 2018, the reporting person was granted 10,000 restricted stock units, vesting in twelve equal quarterly installments beginning the first quarter after the grant date.
(5) Prior to the Initial Vesting Date, the Vested Ratio shall be zero. On the Initial Vesting Date, the Vested Ratio shall be 1/6, provided the Grantee's service has not been terminated prior to the Initial Vesting Date. For each six month period of Grantee service from the Initial Vesting Date until the Vested Ratio equals 1/1, the Vested Ratio shall be increased by 1/6. This Restricted Stock Unit will be fully vested after three (3) years of service. The Initial Vesting Date shall be six months following the Date of Restricted Stock Unit Grant.

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