Lawrence Corey - Aug 12, 2022 Form 4 Insider Report for Gritstone bio, Inc. (GRTS)

Role: Director
Signature: /s/ Rahsaan Thompson, Attorney-in-Fact for Lawrence Corey
Stock symbol: GRTS
Transactions as of: Aug 12, 2022
Transactions value $: $0
Form type: 4
Date filed: 8/16/2022, 04:21 PM
Next filing: Jun 21, 2023

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	+38K		$0.00	38K	Aug 12, 2022	Common Stock	38K	$4.10	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The Stock Option shall vest and become exercisable as to 1/36 of the total number of shares subject thereto on each monthly anniversary of the grant date such that the entire number of shares subject to the Stock Option are fully vested and exercisable on the third anniversary of the grant date, subject to Reporting Person's continuing service on the Issuer's board of directors through each vesting date.

Content

The Stock Option shall vest and become exercisable as to 1/36 of the total number of shares subject thereto on each monthly anniversary of the grant date such that the entire number of shares subject to the Stock Option are fully vested and exercisable on the third anniversary of the grant date, subject to Reporting Person's continuing service on the Issuer's board of directors through each vesting date.