bluebird bio(BLUE) - 2019 Q4 - Annual Report
bluebird bio(BLUE)2020-02-19 05:15
UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 ___________________________________________________________________________ FORM 10-K ___________________________________________________________________________ (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission ...