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Press release September 17, 2026

Ultragenyx Announces Approval of FAYUVI™ Gene Therapy, the First-Ever FDA-Approved Treatment for Sanfilippo Syndrome Type A (MPS IIIA)

Ultragenyx Pharmaceutical Inc. (RARE)

FAYUVI is a highly anticipated, first-ever treatment option with the potential to stop or slow the devastating, irreversible neurologic progression and loss of function associated with Sanfilippo syndrome Type A Ultragenyx’s UltraCare® program will support access, and commercial product is expected
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