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BMRNBullishCorporate Developmentsnews
High materiality7/10

BioMarin secures worldwide Fabry license for HM15421/GC1134A with GC Hanmi

Oct 29, 2026, 9:04 AM EDT1 sourcesAI-analyzed
Why it may matterVerify against the original reporting

Adds a meaningful pipeline asset with milestone/royalty upside; small upfront but potential long-term revenue and competitive differentiation via subcutaneous dosing. Limited near-term revenue; however, positive pipeline optics could lift BioMarin's valuation as data emerge.

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What happened, with direct paths to the underlying reporting

BioMarin signed an exclusive worldwide license outside Korea for HM15421/GC1134A, a long-acting subcutaneous enzyme replacement therapy for Fabry disease. The deal provides BioMarin with an upfront $70 million and potential milestones up to $405 million plus royalties, expanding its Fabry portfolio post-Amicus acquisition. The program is in Phase 1/2, with Korea rights retained by GC/Hanmi, and could yield a first subcutaneous Fabry treatment if successful.

  • BioMarin licenses HM15421/GC1134A for Fabry outside Korea. Upfront $70M; up to $405M milestones.
  • GC Biopharma and Hanmi retain Korea rights; BioMarin leads outside Korea after Phase 1/2.
  • HM15421/GC1134A is a long-acting, subcutaneous enzyme replacement therapy (a-Gal A) for Fabry.
  • Orphan Drug Designation granted to HM15421/GC1134A in 2024, potential first subcutaneous Fabry ERT.
  • Deal builds on BioMarin's Amicus acquisition and expands Fabry portfolio and patient reach.

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