David Arkowitz - Insider Trading & Ownership

Location: C/O Flexion Therapeutics, Inc., 10 Mall Road, Suite 301, Burlington, MA
Summary: The estimated net worth of David Arkowitz is at least $2.17M dollars as of November 24, 2025. David Arkowitz is the Chief Financial Officer of Flexion Therapeutics Inc and owns shares of Flexion Therapeutics Inc stock worth about $1.88M. David Arkowitz is the Chief Financial Officer of Seres Therapeutics, Inc. and owns shares of Seres Therapeutics, Inc. (MCRB) stock worth about $240K. David Arkowitz is the Director of iBio, Inc. and owns shares of iBio, Inc. (IBIO) stock worth about $50K.
Signature: /s/ Marc Banjak, Attorney-in-fact
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Ownership of David Arkowitz

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Report Period
FLXN	Flexion Therapeutics Inc	Chief Financial Officer	$1.88M		May 10, 2021
MCRB	Seres Therapeutics, Inc.	Chief Financial Officer	$240K		Feb 14, 2024
IBIO	iBio, Inc.	Director	$50K	+$50K	Nov 20, 2025
KANT	KINETA, INC./DE	Director	$0		Jun 30, 2025
FSTX	F-star Therapeutics, Inc.	Director			Jun 17, 2022

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.