Re-submission of BLA for valoctocogene roxaparvovec for adults with severe hemophilia A

The resubmission incorporates the Company's response to the FDA Complete Response (CR) Letter for valoctocogene roxaparvovec gene therapy issued on August 18, 2020, and subsequent feedback, including two-year outcomes from the global GENEr8-1 Phase III study and supportive data from five years of follow-up from the ongoing Phase 1/II dose escalation study.

BioMarin anticipates an FDA response by the end of October on whether the BLA resubmission is complete and acceptable for review. Typically, BLA resubmissions are followed by a six-month review procedure. However, the Company anticipates three additional months of review may be necessary based on the number of data read-outs that will emerge during the procedure. If approved, valoctocogene roxaparvovec would be the first commercially-available gene therapy in the U.S. for the treatment of severe hemophilia A..

The resubmission includes a substantial body of data from the valoctocogene roxaparvovec clinical development program, the most extensively studied gene therapy for severe hemophilia A, including two-year outcomes from the global GENEr8-1 Phase III study. The GENEr8-1 Phase III study demonstrated stable and durable bleed control, including a reduction in the mean annualized bleeding rate (ABR) and the mean annualized Factor VIII infusion rate. In addition, the data package included supportive evidence from five years of follow-up from the 6e13 vg/kg dose cohort in the ongoing Phase 1/II dose escalation study. The resubmission also includes a proposed long-term extension study following all clinical trial participants for up to 15 years, as well as two post-approval registry studies.