The FDA granted Breakthrough Therapy designation to NGN-401, Neurogene's gene therapy for Rett syndrome, based on interim data showing durable functional improvements. The company expects to complete pivotal trial dosing in Q2 2026.
Ultragenyx Pharmaceutical announced positive long-term clinical data for UX111 gene therapy for Sanfilippo syndrome Type A, with up to 8.5 years of follow-up showing sustained biomarker reductions and functional improvements. The company resubmitted its BLA to the FDA in January 2026.
Ultragenyx Pharmaceutical received an Incomplete Response Letter from the FDA for its UX111 gene therapy resubmission for Sanfilippo syndrome type A, requesting additional documentation. The company announced a 10% workforce reduction and expects profitability by 2027.
Ultragenyx reported Q4 2025 revenues of $207 million, up 25% year-over-year, while announcing a 10% workforce reduction and resubmission of its UX111 gene therapy application following positive long-term clinical data.
