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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
1578408	Nick Leschly	C/O Bluebird Bio, Inc. 60 Binney Street Cambridge MA 02142	President And Ceo	Yes	Yes	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	2017-10-20	3,350	$145.02	259,059	No	4	S	Direct
Common Stock	Disposition	2017-10-23	3,700	$145.26	255,359	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	17,186	Indirect	Nick Leschly 2001 Trust

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 22, 2016.
The range of prices for the transaction reported on this line was $145.00 to $145.15. The average weighted price was $145.0187. The reporting person will provide, upon request by the SEC, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
The range of prices for the transaction reported on this line was $145.00 to $145.60. The average weighted price was $145.2581. The reporting person will provide, upon request by the SEC, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.