Antoinette Paone - Oct 31, 2025 Form 4 Insider Report for Generation Bio Co. (GBIO)

Role: CHIEF OPERATING OFFICER
Signature: /s/ Shawna-Gay White, Attorney-in-Fact
Stock symbol: GBIO
Transactions as of: Oct 31, 2025
Transactions value $: $0
Form type: 4
Date filed: 10/31/2025, 04:05 PM
Previous filing: Oct 17, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Paone Antoinette	CHIEF OPERATING OFFICER	C/O GENERATION BIO CO., 301 BINNEY ST, CAMBRIDGE	/s/ Shawna-Gay White, Attorney-in-Fact	2025-10-31	0001907682

Antoinette Paone is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Remarks:

The reporting person will no longer serve as Generation Bio Co.'s chief operating officer effective October 31, 2025. As a result, the reporting person is no longer subject to Section 16 in connection with her transactions in the equity securities of Generation Bio Co. and therefore will no longer report any such transactions on Form 4 or Form 5.