SEC Form 4 · accession 0001209191-15-074324

bluebird bio, Inc. · BLUE

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

Reporting owner

Officer — Principal Accounting Officer

Period of report

Oct 2, 2015

Accepted (ET)

Oct 6, 2015 · 4:06 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 2, 2015	M	250	$20.70	A	3,468	D
Common Stock	Oct 2, 2015	M	166	$24.47	A	3,634	D
Common Stock^F2	Oct 2, 2015	S	316	$85.9763	D	3,318	D
Common Stock	Oct 2, 2015	S	100	$86.51	D	3,218	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Options (right to buy)^F3	$20.70	Oct 2, 2015	M	250	D	—	Dec 2, 2023	Common Stock	250	6,250	D
Stock Option (right to buy)^F4	$24.47	Oct 2, 2015	M	166	D	—	Mar 3, 2024	Common Stock	166	4,506	D

F1The sales reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 5, 2015.
F2The range in prices for the transaction reported on this line was $85.45 to $86.28. The average weighted price was $85.9763. 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.
F3This option vests over a four-year period, at a rate of twenty-five percent(25%) on November 11, 2014 and in 36 equal monthly installments thereafter.
F4This option vests over a four-year period, at a rate of twenty-five percent(25%) on January 1, 2015 and in 36 equal monthly installments thereafter.