Andrew Obenshain - 01 Feb 2022 Form 4 Insider Report for bluebird bio, Inc. (BLUE)

Role: President and CEO, Director
Signature: /s/ Helen C. Fu, Attorney-in-Fact
Issuer symbol: BLUE
Transactions as of: 01 Feb 2022
Net transactions value: $0
Form type: 4
Filing time: 03 Feb 2022, 17:08:20 UTC
Previous filing: 12 Jan 2022
Next filing: 08 Aug 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLUE	Common Stock	Award	$0	+18,000	+7.2%	$0.000000	268,936	01 Feb 2022	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	BLUE	Stock Option (right to buy)	Award	$0	+90,000		$0.000000	90,000	01 Feb 2022	Common Stock	90,000	$7.80	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Restricted stock unit awards vest over a four-year period at the rate of 25% on 01/04/2023, 25% on 01/04/2024, 25% on 01/04/2025, and 25% on 01/04/2026.
F2	Reflects a correction to the balance of securities beneficially owned to increase the balance by 4,240 shares, with respect to shares incorrectly reported as sold to satisfy tax withholding obligations of the reporting person in connection with the vesting of Restricted Stock Units.
F3	This stock option vests over a four-year period at the rate of 25% on 01/04/2023 and then in 36 equal monthly installments thereafter.