SEC Form 4 · accession 0001209191-15-033117

bluebird bio, Inc. · BLUE

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

Reporting owner

Mitchell H. Finer

Officer — Chief Scientific Officer

Period of report

Apr 6, 2015

Accepted (ET)

Apr 8, 2015 · 4:13 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	Apr 6, 2015	M	8,522	$2.0864	A	8,522	D
Common Stock	Apr 6, 2015	M	6,478	$5.5004	A	15,000	D
Common Stock^F2	Apr 6, 2015	S	679	$117.589	D	14,321	D
Common Stock^F3	Apr 6, 2015	S	11,638	$118.6195	D	2,683	D
Common Stock^F4	Apr 6, 2015	S	2,683	$119.4638	D	0	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Option (right to buy)^F5	$2.0864	Apr 6, 2015	M	2,039	D	—	Jul 13, 2021	Common Stock	2,039	900	D
Stock Option (right to buy)^F5	$2.0864	Apr 6, 2015	M	1,594	D	—	Jul 13, 2021	Common Stock	1,594	266	D
Stock Option (right to buy)^F5	$2.0864	Apr 6, 2015	M	1,594	D	—	Jul 13, 2021	Common Stock	1,594	3,454	D
Stock Option (right to buy)^F6	$2.0846	Apr 6, 2015	M	3,295	D	—	Jun 4, 2022	Common Stock	3,295	7,140	D
Stock Option (right to buy)^F7	$5.5004	Apr 6, 2015	M	6,478	D	—	Jan 16, 2023	Common Stock	6,478	38,755	D

Explanation of responses

F1The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 22, 2014.
F2The range of prices for the transaction reported on this line was $117.10 to $118.00. The average weighted price was $117.5890. 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 $118.19 to $119.1750. The average weighted price was $117.3949. 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.
F4The range of prices for the transaction reported on this line was $119.22 to $119.9050. The average weighted price was $119.4638. 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.
F5This option vests at a rate of twenty-five percent (25%) on April 15, 2012 and in 36 equal monthly installments thereafter.
F6This option vests at a rate of twenty-five percent (25%) on May 1, 2013 and in 36 equal monthly installments thereafter.
F7This option vests as follows: (i) 107,281 shares vest at a rate of twenty-five percent (25%) on January 1, 2014 and in 36 equal monthly installments thereafter, and (ii) 16,504 shares vest at a rate of twenty-five percent (25%) on April 1, 2014 and in 36 equal monthly installments thereafter, and (iii) 41,262 shares vest at a rate of twenty-five percent (25%) on May 1, 2014 and in 36 equal monthly installment thereafter.