Insider Trading & Ownership of Andrew R. Allen

Location: Boulder, CO
Summary: The estimated net worth of Andrew R. Allen is at least $1.85M dollars as of August 8, 2025. Andrew R. Allen is the PRESIDENT AND CEO, Director of Gritstone bio, Inc. and owns shares of Gritstone bio, Inc. stock worth about $1.82M. Andrew R. Allen is the Director of Epizyme, Inc. and owns shares of Epizyme, Inc. stock worth about $29K.
Signature: /s/ Jacquelyn Sumer, Attorney-in-Fact
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Ownership of Andrew R. Allen

Symbol	Company	Relationship	Holdings Value	Report Period
GRTS	Gritstone bio, Inc.	PRESIDENT AND CEO, Director	$1.82M	Jun 24, 2024
EPZM	Epizyme, Inc.	Director	$29K	Jun 11, 2021
ADAP	Adaptimmune Therapeutics PLC	Director		Jul 1, 2024
CGEM	Cullinan Therapeutics, Inc.	Director		Aug 7, 2025
SRRA	Sierra Oncology, Inc.	Director, 10%+ Owner		Jul 1, 2022
TCRR	TCR2 THERAPEUTICS INC.	Director		Jun 1, 2023

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

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