Sean Godbout - 06 Feb 2026 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
06 Feb 2026
Net transactions value
-$72,224
Form type
4
Filing time
10 Feb 2026, 16:56:59 UTC
Previous filing
06 Oct 2025
Next filing
17 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 10 Feb 2026 0002057736

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction BIIB Common Stock Options Exercise $0 +257 +52% $0.000000 752 06 Feb 2026 Direct
transaction BIIB Common Stock Tax liability $15,290 -76 -10% $201.18 676 06 Feb 2026 Direct
transaction BIIB Common Stock Options Exercise $0 +305 +45% $0.000000 981 06 Feb 2026 Direct
transaction BIIB Common Stock Tax liability $20,722 -103 -11% $201.18 878 06 Feb 2026 Direct
transaction BIIB Common Stock Options Exercise $0 +517 +59% $0.000000 1,395 06 Feb 2026 Direct
transaction BIIB Common Stock Tax liability $36,212 -180 -13% $201.18 1,215 06 Feb 2026 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 -257 -100% $0.000000 0 06 Feb 2026 Common Stock 257 $0.000000 Direct F1
transaction BIIB Restricted Stock Unit Options Exercise $0 -305 -50% $0.000000 305 06 Feb 2026 Common Stock 305 $0.000000 Direct F2
transaction BIIB Restricted Stock Unit Options Exercise $0 -517 -33% $0.000000 1,035 06 Feb 2026 Common Stock 517 $0.000000 Direct F3
* 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 02/08/2023.
F2 The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/07/2024.
F3 The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/06/2025.