REGENXBIO Inc., a clinical-stage biotechnology company, provides gene therapy product candidates to deliver genes to cells to address genetic defects or to enable cells in the body to produce therapeutic proteins or antibodies that are intended to impact disease. Its gene therapy product candidates are based on NAV Technology Platform, a proprietary adeno-associated virus gene delivery platform. The company's lead product candidate is RGX-314, which is in Phase I/IIa clinical trial for the treatment of wet age-related macular degeneration. It is also developing RGX-121 that is in Phase I/II clinical trial to treat mucopolysaccharidosis type II; RGX-111, which is in Phase I clinical trial for treating mucopolysaccharidosis type I; RGX-181 for the treatment of late infantile neuronal ceroid lipofuscinosis type II disease; and RGX-501, which is in Phase I/II clinical trials to treat homozygous familial hypercholesterolemia. REGENXBIO Inc. also licenses its NAV Technology Platform to other