Biogen Inc. (BIIB) Stock Moves -0.15%: What You Should Know Posted byZacks Equity Research August 26, 2021 Leave a comment on Biogen Inc. (BIIB) Stock Moves -0.15%: What You Should Know Biogen Inc. (BIIB) closed at $342.24 in the latest trading session, marking a -0.15% move from the prior day.