Andrew Obenshain - Aug 2, 2021 Form 4 Insider Report for bluebird bio, Inc. (BLUE)

Role: President of SGD
Signature: /s/ Helen C. Fu, Attorney-in-Fact
Stock symbol: BLUE
Transactions as of: Aug 2, 2021
Transactions value $: $0
Form type: 4
Date filed: 8/4/2021, 04:52 PM
Previous filing: Jun 8, 2021
Next filing: Nov 17, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLUE	Common Stock	Award	$0	+100K	+252.54%	$0.00	140K	Aug 2, 2021	Direct	F1

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	BLUE	Stock Option (right to buy)	Award	$0	+200K		$0.00	200K	Aug 2, 2021	Common Stock	200K	$25.60	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Subject to certain performance criteria, this restricted stock unit award shall vest over a 4-year period at the rate of 25% on each of 8/2/2022, 8/2/2023, 8/2/2024 and 8/2/2025.
F2	Subject to certain performance criteria, this stock option shall vest over a 4-year period at the rate of 25% on 8/2/2022 and then in 36 equal monthly installments thereafter.