Members of Congress who disclosed trading BIIB

Biogen Inc. CMN (BIIB)

27 members of Congress reported a total of 180 transactions in Biogen Inc. CMN (BIIB) on their STOCK Act periodic transaction reports between December 20, 2013 and June 5, 2026: 93 purchases, 87 sales.

Each filing reports a dollar range, not an amount, so this page counts filings and prints every range exactly as filed. No total is calculated anywhere on this page, because the disclosures do not support one.