Sean Godbout - 01 Apr 2025 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Chief Accounting Officer
Signature: /s/ Samuel Ntonme, attorney-in-fact for Mr. Godbout
Issuer symbol: BIIB
Transactions as of: 01 Apr 2025
Net transactions value: $0
Form type: 4
Filing time: 03 Apr 2025, 16:15:42 UTC
Previous filing: 10 Mar 2025
Next filing: 06 Oct 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	BIIB	Common Stock						477	01 Apr 2025	Direct	F1

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	Award	$0	+545		$0.000000	545	01 Apr 2025	Common Stock	545	$0.000000	Direct	F2

* 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 equal yearly installments beginning on the first anniversary of the grant date of April 1, 2025.