James Cho - Mar 8, 2021 Form 4 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: Mar 8, 2021
Transactions value $: $0
Form type: 4
Date filed: 11/19/2021, 04:07 PM
Previous filing: Nov 19, 2021
Next filing: Apr 20, 2022

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	GRTS	Stock Option (Right to Buy)	Award	$0	+25K		$0.00	25K	Mar 8, 2021	Common Stock	25K	$13.87	Direct	F1

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

Explanation of Responses:

Id	Content
F1	One forty-eighth (1/48th) of the shares initially subject to the option will vest on each monthly anniversary measured from March 8, 2021 (the "Vesting Commencement Date"), so that 100% of the shares subject to the option will be fully vested and exercisable as of the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service through each vesting date.

Content

One forty-eighth (1/48th) of the shares initially subject to the option will vest on each monthly anniversary measured from March 8, 2021 (the "Vesting Commencement Date"), so that 100% of the shares subject to the option will be fully vested and exercisable as of the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service through each vesting date.