Elisabeth Leiderman - Oct 17, 2022 Form 4 Insider Report for bluebird bio, Inc. (BLUE)

Role: Director
Signature: /s/ Elisabeth Leiderman
Stock symbol: BLUE
Transactions as of: Oct 17, 2022
Transactions value $: -$6,490
Form type: 4
Date filed: 3/9/2023, 03:06 PM
Previous filing: Jun 23, 2022
Next filing: Jun 20, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLUE	Common Stock	Sale	-$6.49K	-1K	-8.05%	$6.46	11.5K	Oct 17, 2022	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Shares were mistakenly sold to cover tax withholding obligations incurred in connection with the vesting of restricted stock units.
F2	The range in prices for the transaction reported on this line was $6.4614 to $6.4671. The average weighted price was $6.4643. The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price.

Remarks:

Due to an administrative oversight, shares were inadvertently sold to cover tax withholding obligations incurred in connection with the vesting of Restricted Stock Units on behalf of the Reporting Person, a non-employee director.