bluebird bio, Inc. Loss Submission Form

(i) data supporting bluebird’s BLA submission for LentiGlobin for SCD was insufficient to demonstrate drug product comparability; (ii) Defendants downplayed the foreseeable impact of disruptions related to the COVID-19 pandemic on the Company’s BLA submission schedule for LentiGlobin for SCD, particularly with respect to manufacturing; (iii) as a result of all the foregoing, it was foreseeable that the Company would not submit the BLA for LentiGlobin for SCD in the second half of 2021; and (iv) as a result, the Company’s public statements were materially false and misleading at all relevant times.