Ultragenyx Pharmaceutical Inc.

09/17/2026 | Press release | Distributed by Public on 09/17/2026 13:56

Material Event (Form 8-K)

Item 8.01

Other Events.

On September 17, 2026, Ultragenyx Pharmaceutical Inc. ("Ultragenyx" or the "Company") announced that the U.S. Food and Drug Administration (the "FDA") granted standard full approval of FAYUVIâ„¢ (rebisufligene etisparvovec-hopf), also known as UX111, for the treatment of pediatric patients with mucopolysaccharidosis type IIIA (MPS IIIA, Sanfilippo syndrome Type A). FAYUVI is the first-ever FDA-approved treatment for Sanfilippo syndrome Type A, a progressive and fatal neurodegenerative disease, and the second gene therapy approval for Ultragenyx. The Company received a Priority Review Voucher upon this approval.

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