- Business
- Biogen Inc. (Nasdaq: BIIB; SIX: BIIB) is a leading biotechnology company that discovers, develops, manufactures and commercializes therapies primarily for neurological and neurodegenerative diseases, as well as immunology and rare diseases; its core products include Tecfidera (dimethyl fumarate) and Vumerity (diroximel fumarate) for multiple sclerosis, Avonex (interferon beta-1a) and Plegridy (peginterferon beta-1a) for relapsing multiple sclerosis, Tysabri (natalizumab) for relapsing-remitting multiple sclerosis and Crohn's disease, Spinraza (nusinersen) for spinal muscular atrophy, and Leqembi (lecanemab-irmb, co-developed with Eisai) for early Alzheimer's disease. The company operates globally in the United States, Europe, Asia and other regions through direct sales forces, distributors and marketing groups, with manufacturing capabilities for complex biologics; it also offers biosimilars via its Samsung Bioepis joint venture. Founded in 1978 in Geneva, Switzerland by Nobel laureates Walter Gilbert and Phillip Sharp among others, with principal executive offices relocated to Cambridge, Massachusetts in 1982, Biogen merged with IDEC Pharmaceuticals in 2003 to form Biogen Idec, later reverting to Biogen Inc. Recent developments include the November 2025 completion of its acquisition of Alcyone Therapeutics for an upfront $85 million plus milestones to gain the ThecaFlex DRx drug delivery system under clinical study; a November 2025 partnership with Dayra Therapeutics featuring a $50 million upfront payment to develop oral macrocyclic peptides for immunological targets, with options to acquire candidates; a June 2025 R&D funding collaboration with Royalty Pharma providing up to $250 million for litifilimab development in exchange for royalties; and a prior $1.15 billion deal to acquire HI-Bio for immune therapies.