Regenxbio IncFDA alignment and planned resubmission of BLA for Navsunli gene therapy for MPS II

Regenxbio shares rose 16.3% after the company announced alignment with the FDA on the next regulatory steps for the potential accelerated approval of Navsunli, a one-time investigational gene therapy for Mucopolysaccharidosis II, also known as Hunter syndrome. The FDA acknowledged that existing clinical data are sufficient to support accelerated approval and asked the company to request a Type A meeting to review longer-term biomarker and clinical data. Regenxbio plans to resubmit the biologics license application in the third quarter of 2026, with the Type A meeting expected in July. The development follows a complete response letter from the FDA in February 2026 and the lifting of a clinical hold last month. Year to date, Regenxbio shares have declined 37%, compared with a 1.1% decrease for the industry.
Regenxbio IncFDA alignment and planned resubmission of BLA for Navsunli gene therapy for MPS II
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