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Financial Results, Press Release
Earnings Release
Amended material disclosure
Biogen Inc. 2026 Annual Meeting Results: Ten Directors Elected
Completes Acquisition of Apellis Pharmaceuticals
Reports Strong First Quarter 2026 Results
Annual Report to Security Holders
Q2
Q1
FY 2024
Q3
FY 2023
Tender Offer Statement by Third Party
Tender Offer Statement by Issuer
Prospectus Filed Pursuant to Rule 424(b)(2)
S-3ASR
Definitive Proxy Statement
Additional Proxy Materials
PRE 14A
Initial Statement of Beneficial Ownership
Amended Schedule 13G - Ownership Report
Statement of Changes in Beneficial Ownership
Notice of Proposed Sale of Securities
Amended Tender Offer Statement by Third Party
Free Writing Prospectus
Schedule 13D - Ownership Report