Antoinette Paone - Jan 2, 2024 Form 4 Insider Report for Generation Bio Co. (GBIO)

Signature
/s/ Benjamin Waters, Attorney-in-Fact
Stock symbol
GBIO
Transactions as of
Jan 2, 2024
Transactions value $
-$3,961
Form type
4
Date filed
1/3/2024, 04:35 PM
Previous filing
Dec 5, 2023
Next filing
Jan 17, 2024

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction GBIO Common Stock Sale -$3.96K -2.45K -29.55% $1.62 5.83K Jan 2, 2024 Direct F1, F2

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 +161K $0.00 161K Jan 2, 2024 Common Stock 161K $1.86 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 24, 2023.
F2 Includes 2,445 shares acquired under the company's employee stock purchase plan since December 5, 2023.
F3 The option to purchase 160,650 shares of common stock was granted on January 2, 2024. The shares underlying the option vest over four years, with 25% of the shares vesting on January 2, 2025 and the remaining shares vesting in equal quarterly installments thereafter.