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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
1595896	James Mandell	C/O Bluebird Bio, Inc. 150 Second Street Cambridge MA 02141		Yes	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	Acquisiton	2017-02-15	1,050	$25.16	2,050	No	4	M	Direct
Common Stock	Disposition	2017-02-15	1,050	$80.22	1,000	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
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	2017-02-15	1,050	$0.00	1,050	$25.16

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
4,500		2024-06-11	No	4	M	Direct

Footnotes

This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 13, 2016.
The range in prices for the transaction reported on this line was $80.00 to $80.50. The average weighted price was $80.2236. 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 option vests 100% on the earlier of June 11, 2015 or the date of the next annual meeting of stockholders.