Regenxbio (RGNX) Earnings Call Presentation

RGX-202 Therapeutic Approach - RGX-202 is designed to improve function and preserve muscle health, delivered by proprietary NAV® AAV8 vector[24] - The trial is designed to demonstrate meaningful change in disease trajectory in pursuit of broad label, with positive interim efficacy and safety outcomes reported in Phase I/II[25] - RGX-202 has product purity levels of more than 80% full capsids due to industry-leading manufacturing[21] - A proactive, short-course immune modulation regimen is designed to counter safety concerns common with high-dose AAV gene therapy and to improve safety outcomes[22] AFFINITY DUCHENNE Phase I/II Trial Results - RGX-202 was well-tolerated in 13 patients across both dose levels with no SAEs or AESIs[62] - Biomarker data support consistent robust expression, transduction, and sarcolemmal localization of RGX-202 microdystrophin[62] - At 9 months, Dose Level 2 participants (n=5) demonstrated a mean change in NSAA of 4.8 compared to natural history external controls (n=65)[44] - At 12 months, Dose Level 2 participants (n=4) demonstrated a mean change in NSAA of 6.8 compared to natural history external controls (n=26)[47] - Dose Level 2 timed task velocity changes exceeded MCID benchmarks at 12 months[50] - Caregivers reported improved function in the home and community as measured by key dimensions of the PODCI at 12 months compared to expected decline in natural history[54] Future Development - The company plans for a mid-2026 BLA submission using accelerated approval pathway and a potential FDA approval in 1H 2027[18]