Jason P. Rhodes - Jun 8, 2023 Form 4 Insider Report for Generation Bio Co. (GBIO)

Role: Director
Signature: /s/ Ommer Chohan, Attorney-in-Fact
Stock symbol: GBIO
Transactions as of: Jun 8, 2023
Transactions value $: $0
Form type: 4
Date filed: 6/12/2023, 04:15 PM
Previous filing: May 25, 2023
Next filing: Feb 20, 2024

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	+25K		$0.00	25K	Jun 8, 2023	Common Stock	25K	$4.83	Direct	F1, F2

* 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 8, 2023. The shares underlying the option will fully vest on the earlier of: June 8, 2024 and the date of Generation Bio's 2024 annual meeting of stockholders.
F2	The Reporting Person is a member of Atlas Venture Associates X, LLC and is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the option to Atlas Venture Life Science Advisors, LLC. As such, the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.

Content

This option was granted on June 8, 2023. The shares underlying the option will fully vest on the earlier of: June 8, 2024 and the date of Generation Bio's 2024 annual meeting of stockholders.

The Reporting Person is a member of Atlas Venture Associates X, LLC and is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the option to Atlas Venture Life Science Advisors, LLC. As such, the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.