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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1293971	Bluebird Bio Inc.	BLUE	Biological Products, (No Disgnostic Substances) (2836)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1629278	J Thomas Klima	C/O Bluebird Bio, Inc. 455 Grand Union Boulevard Somerville MA 02145	See Remarks	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2024-03-04	4,573	$1.53	124,840	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Acquisiton	2024-03-01	199,000	$0.00	199,000	$1.56

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
199,000		2034-03-01	No	4	A	Direct

Footnotes

Shares were sold to cover tax withholding obligations incurred in connection with the vesting of Restricted Stock Units.
The range in prices for the transaction reported on this line was $1.52 to $1.55. The average weighted price was $1.5276. 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.
This stock option will vest over a four-year period at the rate of 25% on the first anniversary of March 1, 2024, and then in equal monthly installments for the remaining 36 months.