MICHAEL KNOWLES - 07 Feb 2025 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Signature
/s/ Michael Knowles
Issuer symbol
OSS
Transactions as of
07 Feb 2025
Transactions value $
$368,173
Form type
4
Filing time
02 Sep 2025, 19:49:27 UTC
Previous filing
30 Dec 2024

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
KNOWLES MICHAEL Chief Executive Officer, Director 2235 ENTERPRISE STREET, SUITE 110, ESCONDIDO /s/ Michael Knowles 22 Aug 2025 0001755059

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OSS Common Stock Award $534K +131K +27.56% $4.06 608K 07 Feb 2025 Direct F1, F2
transaction OSS Common Stock Tax liability -$63.2K -16.8K -2.76% $3.76 592K 20 Feb 2025 Direct F3, F4
transaction OSS Common Stock Award $0 +21K +3.55% $0.00 613K 21 May 2025 Direct F5, F6
transaction OSS Common Stock Tax liability -$58.4K -19.1K -3.11% $3.06 594K 05 Jun 2025 Direct F7, F8
transaction OSS Common Stock Tax liability -$44K -8.36K -1.41% $5.26 585K 20 Aug 2025 Direct F9, F10
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 Includes 512,898 unvested restriced stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
F3 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.
F4 Includes 469,082 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
F5 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.
F6 Includes 490,082 unvested restriced stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
F7 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.
F8 Includes 440,082 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.
F9 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.
F10 Includes 418,173 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions.