STEVENSON, Md.--(BUSINESS WIRE)--The securities litigation law firm of Brower Piven, A Professional Corporation, announces that a class action lawsuit has been commenced in the United States District Court for the District of Massachusetts on behalf of purchasers of Biogen Inc. (“Biogen” or the “Company”) (Nasdaq: BIIB) securities during the period between January 29, 2015 and July 23, 2015, inclusive (the “Class Period”). Investors who wish to become proactively involved in the litigation have