John Morrison - Aug 10, 2021 Form 4 Insider Report for ONE STOP SYSTEMS, INC. (OSS)

Role: Chief Financial Officer
Signature: /s/ John Morrison
Stock symbol: OSS
Transactions as of: Aug 10, 2021
Transactions value $: -$9,112
Form type: 4
Date filed: 8/16/2021, 06:55 PM
Previous filing: Jun 22, 2021
Next filing: Nov 15, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OSS	Common Stock	Options Exercise		+2.5K	+1.97%		129K	Aug 10, 2021	Direct	F1
transaction	OSS	Common Stock	Tax liability	-$4.85K	-761	-0.59%	$6.37	129K	Aug 10, 2021	Direct	F2
transaction	OSS	Common Stock	Options Exercise		+2.5K	+1.94%		131K	Aug 12, 2021	Direct	F1
transaction	OSS	Common Stock	Tax liability	-$4.26K	-729	-0.56%	$5.85	130K	Aug 12, 2021	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	OSS	Restricted Stock Unit	Options Exercise	$0	-2.5K	-50%	$0.00	2.5K	Aug 10, 2021	Common Stock	2.5K		Direct	F1, F4
transaction	OSS	Restricted Stock Unit	Options Exercise	$0	-2.5K	-100%	$0.00^*	0	Aug 12, 2021	Common Stock	2.5K		Direct	F1, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units convert into common stock on a one-for-one basis.
F2	The reporting person received 2,500 shares of common stock upon vesting of the Restricted Stock Units, as reported in this Form 4. The reporting person forfeited 761 shares of common stock underlying the vested and outstanding Restricted Stock Units to cover tax withholdings, using the market price of the issuer's common stock at the time of forfeiture.
F3	The reporting person received 2,500 shares of common stock upon vesting of the Restricted Stock Units, as reported in this Form 4. The reporting person forfeited 729 shares of common stock underlying the vested and outstanding Restricted Stock Units to cover tax withholdings, using the market price of the issuer's common stock at the time of forfeiture.
F4	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.