Sean Godbout - 02 Oct 2025 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role
Chief Accounting Officer
Signature
/s/ Wendell Taylor, attorney-in-fact for Mr. Godbout
Issuer symbol
BIIB
Transactions as of
02 Oct 2025
Net transactions value
-$1,242
Form type
4
Filing time
06 Oct 2025, 13:00:24 UTC
Previous filing
03 Apr 2025
Next filing
10 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Godbout Sean Chief Accounting Officer 225 BINNEY, CAMBRIDGE /s/ Wendell Taylor, attorney-in-fact for Mr. Godbout 06 Oct 2025 0002057736

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction BIIB Common Stock Options Exercise $0 +26 +5.5% $0.000000 503 02 Oct 2025 Direct
transaction BIIB Common Stock Tax liability $1,242 -8 -1.6% $155.25 495 02 Oct 2025 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction BIIB Restricted Stock Unit Options Exercise $0 -26 -49% $0.000000 27 02 Oct 2025 Common Stock 26 $0.000000 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 10/02/2023.