Biogen Inc. has finalized its acquisition of Apellis Pharmaceuticals for $5.6 billion, significantly enhancing its portfolio in immune disease therapies. This move follows recent announcements of a substantial $2 billion investment in North Carolina manufacturing and securing rights to felzartamab for $850 million in Greater China. Following the acquisition, Biogen's shares rose 1.3% in premarket trading, indicating investor confidence despite navigating a mixed market landscape and anticipated challenges in integrating Apellis.