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March 12, 2026

Ultragenyx Announces Positive 36-Week Data from Phase 3 Study of DTX301 AAV8 Gene Therapy for the Treatment of Ornithine Transcarbamylase (OTC) Deficiency

Statistically significant improvements in primary endpoint of ammonia control compared with placebo at 36 weeks Clinically important changes observed in patient global impression scale for overall OTC symptoms, OTC deficiency symptoms, and OTC impact on daily living DTX301 was well tolerated with

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February 23, 2026

Ultragenyx to Participate at Investor Conferences in March

NOVATO, Calif., Feb. 23, 2026 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development and commercialization of novel therapies for serious rare and ultra-rare genetic diseases, today announced participation in three upcoming investor

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