James Cho - 08 Mar 2021 Form 4 Insider Report for Gritstone bio, Inc.

Role: Chief Accounting Officer
Signature: /s/ Rahsaan Thompson, Attorney-in-Fact for James Cho
Issuer symbol: N/A
Transactions as of: 08 Mar 2021
Net transactions value: $0
Form type: 4
Filing time: 19 Nov 2021, 16:07:25 UTC
Previous filing: 19 Nov 2021
Next filing: 20 Apr 2022
SEC: View on sec.gov

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	+25,000		$0.000000	25,000	08 Mar 2021	Common Stock	25,000	$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.