Amgen and Celltrion settle biosimilars patent dispute

29 January 2025

US biotech major Amgen (Nasdaq: AMGN) announced that it has reached resolution of its patent infringement litigation related to South Korea-based Celltrion’s (Kosdaq: 068270) denosumab biosimilar products, Amgen brands Prolia and Xgeva.

The court’s order issued on January 24, 2025, holds the claims of Amgen’s US patents asserted against Celltrion valid, enforceable and infringed by Celltrion's denosumab biosimilars in the USA.

In addition, Amgen and Celltrion have reached a confidential settlement that allows Celltrion to launch its biosimilar products in the U.S. as early as June 1, 2025. Specific financial terms remain confidential. The settlement and court decision affirm the strength of Amgen's patent rights for denosumab.

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