Info
Insider Ownership

Insider Trading & Ownership of Catherine Stehman-Breen

Location: Cambridge, MA
Summary: The estimated net worth of Catherine Stehman-Breen is at least $275K dollars as of 06 Jun 2025. Catherine Stehman-Breen is the Director of Generation Bio Co. and owns shares of Generation Bio Co. (GBIO) stock worth about $275K.
Signature: /s/ Shawna-Gay White, Attorney-in-Fact
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Ownership of Catherine Stehman-Breen

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
GBIO	Generation Bio Co.	Director	$275K			04 Jun 2025
DYN	Dyne Therapeutics, Inc.	Director				30 May 2025
TNYA	Tenaya Therapeutics, Inc.	Director				29 May 2025

Insider Transactions Reported by Catherine Stehman-Breen:

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.