0001193125-15-320650 Sample Contracts

BIOGEN INC. and U.S. BANK NATIONAL ASSOCIATION, as Trustee INDENTURE Debt Securities Dated as of September 15, 2015

Indenture • September 16th, 2015 • Biogen Inc. • Biological products, (no disgnostic substances) • New York

• Contract Type
  Indenture
• Filed
  September 16th, 2015
• Company
  Biogen Inc.
• Industry
  Biological products, (no disgnostic substances)
• Jurisdiction
  New York

INDENTURE, dated as of September 15, 2015, by and between Biogen Inc., a Delaware corporation, as Issuer (the “Company”), and U.S. Bank National Association, a national association, as Trustee (the “Trustee”).

BIOGEN INC., as Issuer and U.S. Bank National Association, as Trustee First Supplemental Indenture Dated as of September 15, 2015

First Supplemental Indenture • September 16th, 2015 • Biogen Inc. • Biological products, (no disgnostic substances) • New York

• Contract Type
  First Supplemental Indenture
• Filed
  September 16th, 2015
• Company
  Biogen Inc.
• Industry
  Biological products, (no disgnostic substances)
• Jurisdiction
  New York

SUPPLEMENTAL INDENTURE (this “First Supplemental Indenture”), dated as of September 15, 2015, between BIOGEN INC., a Delaware corporation (the “Company”), and U.S. Bank National Association, a national association, as Trustee (the “Trustee”).