Andrew Allen - Feb 1, 2024 Form 4 Insider Report for Gritstone bio, Inc. (GRTS)

Role: PRESIDENT AND CEO, Director
Signature: /s/ Vassiliki Economides, Attorney-in-Fact for Andrew R. Allen
Stock symbol: GRTS
Transactions as of: Feb 1, 2024
Transactions value $: $0
Form type: 4
Date filed: 2/5/2024, 06:57 PM
Previous filing: Jul 5, 2023
Next filing: May 17, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GRTS	Common Stock	Award	$0	+105K	+13.22%	$0.00	899K	Feb 1, 2024	Direct	F1, F2
holding	GRTS	Common Stock						1.45M	Feb 1, 2024	See footnote	F3

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	+615K		$0.00	615K	Feb 1, 2024	Common Stock	615K	$2.46	Direct	F4

* 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") of which 1/2 vests on the first anniversary of the grant date, with the remainder of grant vesting on the second anniversary of the grant date, subject to the continued service of the Reporting Person on each vesting date. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.
F2	Includes 781,145 RSUs which are subject to vesting.
F3	The shares are held in the name of the Reporting Person's revocable trust of which the Reporting Person is a co-trustee. The Reporting person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.
F4	The option vests as to 1/24th of the total grant monthly beginning February 1, 2024 until such time as the option is 100% vested, subject to the continued service of the Reporting Person on each vesting date.