Nicole Murphy - 06 Feb 2026 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role
Head of Pharm Ops and Tech
Signature
/s/ Wendell Taylor, attorney in fact for Nicole Murphy
Issuer symbol
BIIB
Transactions as of
06 Feb 2026
Net transactions value
-$671,740
Form type
4
Filing time
10 Feb 2026, 17:03:41 UTC
Previous filing
12 Feb 2025
Next filing
17 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Murphy Nicole Head of Pharm Ops and Tech 225 BINNEY STREET, CAMBRIDGE /s/ Wendell Taylor, attorney in fact for Nicole Murphy 10 Feb 2026 0001910644

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction BIIB Common Stock Options Exercise $0 +2,102 +15% $0.000000 16,324 06 Feb 2026 Direct F1
transaction BIIB Common Stock Tax liability $204,600 -1,017 -6.2% $201.18 15,307 06 Feb 2026 Direct
transaction BIIB Common Stock Options Exercise $0 +1,940 +13% $0.000000 17,247 06 Feb 2026 Direct
transaction BIIB Common Stock Tax liability $183,879 -914 -5.3% $201.18 16,333 06 Feb 2026 Direct
transaction BIIB Common Stock Options Exercise $0 +4,683 +29% $0.000000 21,016 06 Feb 2026 Direct
transaction BIIB Common Stock Tax liability $283,261 -1,408 -6.7% $201.18 19,608 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 -2,102 -100% $0.000000 0 06 Feb 2026 Common Stock 2,102 $0.000000 Direct F2
transaction BIIB Restricted Stock Unit Options Exercise $0 -1,940 -50% $0.000000 1,940 06 Feb 2026 Common Stock 1,940 $0.000000 Direct F3
transaction BIIB Restricted Stock Unit Options Exercise $0 -4,683 -33% $0.000000 9,367 06 Feb 2026 Common Stock 4,683 $0.000000 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025.
F2 The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/8/2023.
F3 The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.
F4 The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.