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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
__________________________
FORM 8-K
__________________________
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): December 19, 2022
__________________________
bluebird bio, Inc.
(Exact name of Registrant as Specified in Its Charter)
_____________________________________________________________
Delaware
001-35966
13-3680878
(State or Other Jurisdiction
of Incorporation)
(Commission File Number)(IRS Employer
Identification No.)
455 Grand Union Boulevard,
Somerville, MA
02145
(Address of Principal Executive Offices)(Zip Code)
(339) 499-9300
(Registrant’s telephone number, including area code)
Not Applicable
(Former Name or Former Address, if Changed Since Last Report)
_____________________________________________________________
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below):
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading
Symbol(s)
Name of each exchange on which registered
Common Stock, $0.01 par value per shareBLUEThe NASDAQ Stock Market LLC
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company 
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. 




Item 8.01
Other Events.

On December 19, 2022, bluebird bio, Inc. (the “Company”) announced that the U.S. Food and Drug Administration lifted its partial clinical hold for patients under the age of 18 in studies evaluating lovotibeglogene autotemcel (lovo-cel) for sickle cell disease.

In December 2021, lovo-cel clinical studies were placed on a partial hold for patients under the age of 18. The hold related to an investigation by the Company into an adolescent patient with persistent, non-transfusion-dependent anemia following treatment with lovo-cel. Based on an investigation of the case and an investigation of an adult patient with persistent anemia following treatment with lovo-cel, patients with a specific genotype known as an alpha-thalassemia trait were added to the exclusion criteria for ongoing studies.





SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
bluebird bio, Inc.
Date: December 19, 2022By:/s/ Andrew Obenshain
Name:Andrew Obenshain
Title:
President and Chief Executive Officer