Erin Jones - 08 Sep 2021 Form 4/A - Amendment Insider Report for Gritstone bio, Inc.

Role: Executive Vice President, Global Regulatory Affairs and Quality
Signature: /s/ Rahsaan Thompson, Attorney-in-Fact for Erin Jones
Issuer symbol: N/A
Transactions as of: 08 Sep 2021
Net transactions value: -$22,058
Form type: 4/A - Amendment
Filing time: 19 Nov 2021, 17:01:29 UTC
Date Of Original Report: 10 Sep 2021
Previous filing: 19 Nov 2021
Next filing: 03 Dec 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GRTS	Common Stock	Options Exercise	$690	+2,000	+4.4%	$0.3450^*	47,900	08 Sep 2021	Direct	F1, F2
transaction	GRTS	Common Stock	Sale	$22,748	-2,000	-4.2%	$11.37^*	45,900	08 Sep 2021	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)	Options Exercise	$0	-2,000	-5.3%	$0.000000	35,971	08 Sep 2021	Common Stock	2,000	$0.3450	Direct	F1, F3

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

Explanation of Responses:

Id	Content
F1	The transaction was made pursuant to a 10b5-1 plan in effect at the time of the transaction.
F2	Includes 25,900 Restricted Stock Units which are subject to vesting.
F3	Fully exercisable.

Remarks:

Executive Vice President, Global Regulatory Affairs and Quality