James Cho - Jan 27, 2021 Form 3 Insider Report for Gritstone bio, Inc. (GRTS)

Role: Chief Accounting Officer
Signature: /s/ Rahsaan Thompson, Attorney-in-Fact for James Cho
Stock symbol: GRTS
Transactions as of: Jan 27, 2021
Transactions value $: $0
Form type: 3
Date filed: 11/19/2021, 03:11 PM
Next filing: Nov 19, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	GRTS	Common Stock						33.4K	Jan 27, 2021	Direct	F1

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
holding	GRTS	Stock Option (Right to Buy)							Jan 27, 2021	Common Stock	40K	$7.14	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Includes 30,200 Restricted Stock Units ("RSUs") which are subject to vesting. Each RSU represents a contingent right to receive one share of common stock of the Issuer.
F2	The stock option vests and becomes exercisable with respect to 25% of the total number of shares on November 13, 2020. The remaining shares vest and become exercisable in equal monthly installments over the following 36 months.