Biogen Inc. (BIIB)

Last Closing Price: 181.55 (2026-03-13)

Forward Price (120-Day)

Forward Price: The price at which a synthetic long stock position (i.e., buying an at-the-money call and selling an at-the-money put) would break even at expiration.

Biogen Inc. (BIIB) had 120-Day Forward Price of 185.08 for 2026-03-13.