Transaction Details

Footnotes

Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025. | The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/08/2023. | The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024. | The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.