Donald William Nicholson - Jun 4, 2025 Form 4 Insider Report for Generation Bio Co. (GBIO)

Role
Director
Signature
/s/ Shawna-Gay White, Attorney-in-Fact
Stock symbol
GBIO
Transactions as of
Jun 4, 2025
Transactions value $
$0
Form type
4
Date filed
6/6/2025, 04:05 PM
Previous filing
Jun 14, 2024
Next filing
Jun 13, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Nicholson Donald William Director C/O GENERATION BIO CO., 301 BINNEY ST, CAMBRIDGE /s/ Shawna-Gay White, Attorney-in-Fact 2025-06-06 0001814617

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction GBIO Stock Option (right to buy) Award $0 +30K $0.00 30K Jun 4, 2025 Common Stock 30K $0.39 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 This option was granted on June 4, 2025. The shares underlying the option will fully vest on the earlier of: June 4, 2026 and the date of Generation Bio's 2026 annual meeting of stockholders.