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

Role: CHIEF OPERATING OFFICER
Signature: /s/ Shawna-Gay White, Attorney-in-Fact
Issuer symbol: GBIO
Transactions as of: 31 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 31 Oct 2025, 16:05:05 UTC
Previous filing: 17 Oct 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	31 Oct 2025	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.