STOCK TITAN

One Stop Systems CFO withholds 3,832 shares

OSS’s CFO had shares withheld to cover taxes on vested RSUs and continues to hold a significant equity position.

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

ONE STOP SYSTEMS, INC. (OSS) reported that its Chief Financial Officer, Daniel G. Gabel, had 3,832 shares of common stock withheld on August 7, 2026 to pay tax liabilities upon conversion of 11,881 vested restricted stock units into common shares. After this tax-withholding disposition, he holds 150,064 shares directly, including 115,881 unvested restricted stock units that remain subject to vesting conditions. No Rule 10b5-1 trading plan is reported for this transaction.

Positive

  • None.

Negative

  • None.
Insider Gabel Daniel G.
Role Chief Financial Officer
Type Security Shares Price Value
Tax Withholding Common Stock F1, F2 3,832 $13.32 $51K
Holdings After Transaction: Common Stock — 150,064 shares (Direct)
Footnotes (2)
  1. F1. The Reporting Person forfeited 3,832 shares of common stock upon conversion of an aggregate 11,881 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 February 7, 2025.
  2. F2. Includes 115,881 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
Shares withheld for taxes 3,832 shares Common stock forfeited on August 7, 2026 to cover tax liabilities
Price used for tax-withholding shares $13.32 per share Market price applied to the 3,832 withheld shares
RSUs converted 11,881 restricted stock units Vested RSUs converted into common stock on August 7, 2026
Holdings after transaction 150,064 shares Common stock directly held by the CFO following the disposition
Unvested restricted stock units 115,881 RSUs Unvested RSUs that remain subject to vesting conditions
restricted stock units financial
"conversion of 11,881 vested and outstanding restricted stock units into shares"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax withholdings financial
"to cover tax withholdings, using the market price of the issuer's"
vesting conditions financial
"unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions"
Vesting conditions are the rules that determine when someone earning company stock or stock options actually gains the right to keep or sell them, typically based on staying with the company for a set time or meeting performance targets. Think of it like keys that unlock gradually — some unlock by calendar date, others only after agreed milestones. Investors care because vesting shapes management incentives, the timing of share sales, and the number of shares that can enter the market, which can affect a company's valuation and ownership mix.
Form 4 regulatory
"grant reported in Table I of the Form 4 filed by the Reporting Person"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

What insider transaction did OSS CFO Daniel G. Gabel report on this Form 4 for OSS?

He reported a disposition of 3,832 shares of ONE STOP SYSTEMS, INC. common stock on August 7, 2026, through withholding of shares to cover tax liabilities tied to the conversion of vested restricted stock units.

Why were 3,832 OSS shares disposed of in the CFO’s August 7, 2026 transaction?

The 3,832 shares of ONE STOP SYSTEMS, INC. common stock were forfeited to cover tax withholdings when an aggregate of 11,881 vested restricted stock units converted into shares of common stock.

How many OSS shares does the CFO hold after the reported transaction?

Following the August 7, 2026 tax-withholding disposition, Daniel G. Gabel holds 150,064 shares of ONE STOP SYSTEMS, INC. common stock directly, which includes 115,881 unvested restricted stock units that remain subject to vesting conditions.

Was the OSS CFO’s August 7, 2026 transaction made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates that no Rule 10b5-1 trading plan is associated with the August 7, 2026 tax-withholding disposition reported by the ONE STOP SYSTEMS, INC. Chief Financial Officer.

What equity award activity underlies the OSS CFO’s reported tax-withholding disposition?

The transaction relates to the conversion of 11,881 vested and outstanding restricted stock units into common shares of ONE STOP SYSTEMS, INC., from which 3,832 shares were forfeited to satisfy tax withholdings.

What portion of the OSS CFO’s reported holdings remains unvested after this Form 4 event?

Within his reported holdings, 115,881 restricted stock units remain unvested and continue to be subject to vesting conditions, according to the footnote describing his equity awards.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
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*
Gabel Daniel G.

(Last)(First)(Middle)
2235 ENTERPRISE STREET #110

(Street)
ESCONDIDO CALIFORNIA 92029

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
ONE STOP SYSTEMS, INC. [ OSS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Stock08/07/2026F3,832(1)D$13.32150,064(2)D
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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The Reporting Person forfeited 3,832 shares of common stock upon conversion of an aggregate 11,881 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 February 7, 2025.
2. Includes 115,881 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
/s/ Daniel G. Gabel09/04/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)