BioMarin Pharmaceutical — May 1, 2025 release

• Additionally, BioMarin recently met with FDA and reached agreement on an overall clinical development plan for BMN 333 in achondroplasia. Assuming the Phase 1 data are supportive, the company plans to initiate a registration-enabling study in 2026, supporting a previously disclosed target for 2030 approval. BioMarin plans to seek similar agreements with additional global regulators in the coming months. • The company announced in April that its pivotal study with PALYNZIQ for the treatment of adolescents between the ages of 12 and 17 met its primary efficacy endpoint, demonstrating a statistically significant lowering in blood Phe levels. These data will support the planned submission of applications in the second half of 2025 to expand PALYNZIQ age eligibility in the United States and Europe. 2 • Other Clinical Pipeline Programs: BMN 351, BioMarin’s next generation oligonucleotide for Duchenne Muscular Dystrophy, and BMN 349, an oral therapeutic for Alpha-1 antitrypsin deficiency (AATD)-associated liver disease, continue to advance. Initial data for BMN 351 is anticipated to be presented at a scientific congress in the second half of 2025 (including muscle dystrophin levels from the 6 mg/kg cohort after 25 weeks of dosing). • During a recent strategic portfolio assessment of R&D programs, BioMarin determined that the evolving profile for BMN 370, a pre-clinical candidate for the treatment of von Willebrand disease, did not meet its threshold for further development and com