Biogen acquires TJ Biopharma's felzartamab rights in China for $850M

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TJ Biopharma Enters into Agreement with Biogen for Felzartamab Assets in the Greater China Region

April 20, 2026 7:30 AM EDT

With this transaction, Biogen now owns exclusive worldwide development and commercialization rights to felzartamab, consolidating global rights under one ownerAdvancing felzartamab a CD38-directed antibody with potential broad applicability across a range of immune-mediated conditions in the Greater China Region presents an important opportunity in a key global marketAgreement builds on TJ Biopharma's development success of felzartamab in China and productive clinical collaboration in Biogen-led Phase 3 trials for IgAN and PMN since April... More