Vijay Yabannavar - Jan 7, 2021 Form 4 Insider Report for Gritstone bio, Inc. (GRTS)

Role: Executive Vice President, Manufacturing and Tech Ops
Signature: /s/ Rahsaan Thompson, Attorney-in-Fact for Vijay Yabannavar
Stock symbol: GRTS
Transactions as of: Jan 7, 2021
Transactions value $: $0
Form type: 4
Date filed: 11/19/2021, 04:57 PM

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GRTS	Common Stock	Award	$0	+28K	+757.58%	$0.00	31.7K	Jan 7, 2021	Direct	F1, F2

* 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 in two equal annual installments over a two year period measured from the grant date. Each RSU represents a contingent right to receive one share of Common Stock of the Issuer.
F2	Includes 3,696 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 28,000 RSUs which vest over time measured from the grant date.

Remarks:

Executive Vice President, Manufacturing and Tech Ops