Tracy Zimmermann - Jan 29, 2024 Form 4 Insider Report for Generation Bio Co. (GBIO)

Role
CHIEF DEVELOPMENT OFFICER
Signature
/s/ Benjamin Waters, Attorney-in-Fact
Stock symbol
GBIO
Transactions as of
Jan 29, 2024
Transactions value $
-$2,804
Form type
4
Date filed
1/31/2024, 04:30 PM
Previous filing
Jan 17, 2024

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction GBIO Common Stock Options Exercise +5.02K +11.01% 50.6K Jan 29, 2024 Direct F1
transaction GBIO Common Stock Tax liability -$2.8K -1.48K -2.91% $1.90 49.2K Jan 29, 2024 Direct

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 Restricted Stock Units Options Exercise $0 -5.02K -100% $0.00* 0 Jan 29, 2024 Common Stock 5.02K Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

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

Explanation of Responses:

Id Content
F1 Each restricted stock unit represents the right to receive one share of the company's common stock.
F2 On January 20, 2023, the reporting person was granted 26,775 restricted stock units. The shares underlying the restricted stock units vest over four years, with 25% of the shares vested on January 15, 2024 and the remaining shares vesting in equal quarterly installments thereafter.
F3 Reflects the forfeit of 15,060 restricted stock units in connection with the reporting person's separation from the company.