GlobeNewswire·Feb 3, 2026, 8:00 AM ET

Ultragenyx Announces Positive Longer-Term Data Demonstrating Treatment with UX111 Gene Therapy Results in Sustained, Significant Reductions in CSF-HS and Continued Meaningful Improvements in Clinical Function Across Multiple Developmental Domains in Children with Sanfilippo Syndrome (MPS IIIA)

Data represents up to 8.5 years of follow-up and are consistent across age, dose, and genotype BLA resubmitted to U.S. FDA in January 2026; Company expects up to six-month review period per FDA guidelines NOVATO,