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benzinga Corporate Catalyst Impact 85/100 ● positive

Ultragenyx Pharmaceutical Says FDA Grants Standard Full Approval Of FAYUVI For Treatment Of Pediatric Patients With Mucopolysaccharidosis Type IIIA

Sep 18, 2026, 11:42 AM UTC · Primary ticker $RARE

Ultragenyx Pharmaceutical announced full FDA approval for FAYUVI, its gene therapy for pediatric Sanfilippo syndrome Type A. This marks a significant milestone as the first-ever approved treatment for this rare, fatal neurodegenerative disease, positioning Ultragenyx for new revenue streams and market leadership in this specific therapeutic area.

Ultragenyx Pharmaceutical (RARE) announced the full FDA approval of FAYUVI for pediatric Sanfilippo syndrome Type A, a progressive and fatal neurodegenerative disease. This is a major positive catalyst as FAYUVI is the first-ever FDA-approved treatment for this condition, providing a new, highly anticipated revenue stream for Ultragenyx. The company also received a Priority Review Voucher, which can be sold or used for future drug applications, adding further value. This approval solidifies Ultragenyx's position in rare disease gene therapy, with commercial product expected within 30-60 days, indicating short-term revenue generation and long-term market leadership in this niche. For traders, this represents a significant opportunity due to the immediate market access and the 'first-in-class' nature of the drug.

$RARE positive FDA approval for first-in-class therapy
Source: benzinga
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