Jason P. Rhodes - Jun 9, 2021 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 9, 2021
Transactions value $: $0
Form type: 4
Date filed: 6/11/2021, 04:14 PM
Previous filing: May 27, 2021
Next filing: Jun 23, 2021

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	+15K		$0.00	15K	Jun 9, 2021	Common Stock	15K	$26.59	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 9, 2021. The shares underlying the option will fully vest on the earlier of: June 9, 2022 and the date of Generation Bio's 2022 annual meeting of stockholders.
F2	This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of1934, as amended, except to the extent of his pecuniary interest therein, if any.

Content

This option was granted on June 9, 2021. The shares underlying the option will fully vest on the earlier of: June 9, 2022 and the date of Generation Bio's 2022 annual meeting of stockholders.

This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of1934, as amended, except to the extent of his pecuniary interest therein, if any.