Biogen Chair Caroline Dorsa to step down; Dr. Maria C. Freire elected as new Chair

BIOGEN INC.

Chair Caroline Dorsa will not stand for re-election at the 2026 Annual Meeting; decision unrelated to any disagreement.
Board elected Dr. Maria C. Freire to serve as Chair, effective after the Annual Meeting.
Dr. Freire's appointment marks an orderly transition of Board leadership.

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