BIOGEN INC. — Director's Dealing 2024

Nov 7, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2024-11-05

Reporting Person: ALEXANDER SUSAN H (EVP Chief Legal Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-11-05	Common Stock	G	20082	—	Disposed	31601	Direct
2024-11-05	Common Stock	G	20082	—	Acquired	20082	Indirect

Footnotes

F1: This transaction involved a gift of securities by the reporting person to an irrevocable trust for the benefit of the reporting person's children on November 5, 2024. The reporting person's spouse is the trustee of the trust.