Biogen Inc. discovers, develops, manufactures, and delivers therapies for treating neurological and neurodegenerative diseases worldwide. The company offers TECFIDERA, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA for multiple sclerosis (MS); SPINRAZA for spinal muscular atrophy; and FUMADERM to treat plaque psoriasis. It also provides BENEPALI, an etanercept biosimilar referencing ENBREL; IMRALDI, an adalimumab biosimilar referencing HUMIRA; and FLIXABI, an infliximab biosimilar referencing REMICADE. In addition, the company offers RITUXAN for treating non-Hodgkin's lymphoma, chronic lymphocytic leukemia (CLL), rheumatoid arthritis, two forms of ANCA-associated vasculitis, and pemphigus vulgaris; RITUXAN HYCELA for non-Hodgkin's lymphoma and CLL; GAZYVA to treat CLL and follicular lymphoma; and OCREVUS for treating relapsing MS and primary progressive MS; and other anti-CD20 therapies. Further, it develops Opicinumab, BIIB061, and BIIB091 for MS and neuroimmunology; Aducanumab, BAN2401, BIIB092, BIIB076, and BIIB080 to treat Alzheimer's disease and dementia; BIIB067, BIIB078, BIIB110, and BIIB100 to treat neuromuscular disorders; BIIB054 and BIIB094 for treating movement disorders; BIIB111 and BIIB112 for ophthalmology; Dapirolizumab pegol and BIIB059 to treat immunology and others; BIIB104 for neurocognitive disorders; BIIB093, TMS-007, and Natalizumab to treat acute neurology; BIIB074 and BIIB095 for pain; and SB11 biosimilar, which are under various stages of development. The company offers products through its sales force and marketing groups. It has collaborations with Genentech, Inc.; Ionis Pharmaceuticals, Inc.; Eisai Co., Ltd.; Alkermes Pharma Ireland Limited; Bristol-Myers Squibb Company; Acorda Therapeutics, Inc.; AbbVie Inc.; Skyhawk Therapeutics, Inc.; Neurimmune SubOne AG; Scribe Therapeutics Inc.; Sangamo Therapeutics Inc.; ISD Immunotech; and Sage Therapeutics, Inc. The company was founded in 1978 and is headquartered in Cambridge, Massachusetts.