SEC Form 4 · accession 0001209191-18-054899

bluebird bio, Inc. · BLUE

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Chief Financial · Other

Period of report

Oct 10, 2018

Accepted (ET)

Oct 12, 2018 · 4:53 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001293971

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock	Oct 10, 2018	M	1,500	$24.47	A	36,995	D
Common Stock^F2	Oct 10, 2018	S	1,100	$134.9518	D	35,895	D
Common Stock^F3	Oct 10, 2018	S	300	$135.6967	D	35,595	D
Common Stock	Oct 10, 2018	S	100	$136.83	D	35,495	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Option (right to buy)^F4	$24.47	Oct 10, 2018	M	1,500	D	—	Mar 3, 2024	Common Stock	1,500	22,021	D

F1The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 2, 2018.
F2The range of prices for the transaction reported on this line was $134.50 to $135.33. The average weighted price was $134.9518. 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.
F3The range of prices for the transaction reported on this line was $135.55 to $135.99. The average weighted price was $135.6967. 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.
F4This option vested over a four-year period, at a rate of twenty-five percent (25%) on January 1, 2015 and in 36 equal monthly installments thereafter.