Read More Pharma Industry News Biogen (BIIB) buys felzartamab rights in China from TJ Biopharma for up to $850m, completing global ownership Biogen pays $100M upfront for felzartamab's China rights from TJ Biopharma, completing global ownership of the CD38 antibody with up to $850M at stake. Read the full analysis. byVenkateshApril 21, 2026