James Cho - 31 Jan 2022 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: 31 Jan 2022
Net transactions value: $0
Form type: 4
Filing time: 20 Apr 2022, 16:24:16 UTC
Previous filing: 19 Nov 2021
Next filing: 06 Feb 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GRTS	Common Stock	Award	$0	+4,400	+11%	$0.000000	43,505	31 Jan 2022	Direct	F1, F2

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	+26,300		$0.000000	26,300	31 Jan 2022	Common Stock	26,300	$5.46	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Represents Restricted Stock Units ("RSUs") which vest on the first anniversary of the grant date. Each RSU represents a contingent right to receive one share of common stock of the Issuer.
F2	Includes 5,669 shares of common stock purchased under the Issuer's Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c) and 19,500 RSUs which vest over time measured from the grant date.
F3	One forty-eighth (1/48th) of the shares initially subject to the option will vest on each monthly anniversary measured from January 31, 2022 (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.