Pappas Capital Announces the Passing of…

NOVATO, CA – July 1, 2014 – Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development of novel products for rare and ultra-rare diseases, announced the first patient screened and enrolled in the Phase 2 study of the human monoclonal anti-FGF23 antibody KRN23 (UX023) in pediatric patients with X-linked hypophosphatemia (XLH). XLH is an inherited metabolic bone disease characterized by short stature, skeletal deformities, bone pain, fractures, and muscle weakness.