Christopher Krawtschuk - 01 Dec 2022 Form 4 Insider Report for bluebird bio, Inc. (BLUE)

Role: Chief Financial Officer
Signature: /s/ Christopher Krawtschuk
Issuer symbol: BLUE
Transactions as of: 01 Dec 2022
Net transactions value: $0
Form type: 4
Filing time: 05 Dec 2022, 15:49:28 UTC
Previous filing: 07 Nov 2022
Next filing: 08 Dec 2023
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	+50,000		$0.000000	50,000	01 Dec 2022	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 Options (Right to buy)	Award	$0	+100,000		$0.000000	100,000	01 Dec 2022	Common Stock	100,000	$7.61	Direct	F2

* 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 12/1/2023, 25% on 12/1/2024, 25% on 12/1/2025, and 25% on 12/1/2026.
F2	The stock option vests over a four-year period at the rate of 25% on 12/1/2023 and then in 36 equal monthly installments thereafter.