Priya Singhal - 31 Jan 2025 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Head of Development
Signature: /s/ Samuel Ntonme, attorney-in-fact for Priya Singhal
Issuer symbol: BIIB
Transactions as of: 31 Jan 2025
Net transactions value: -$83,192
Form type: 4
Filing time: 03 Feb 2025, 18:02:49 UTC
Previous filing: 09 Dec 2024
Next filing: 10 Feb 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BIIB	Common Stock	Options Exercise	$0	+1,828	+34%	$0.000000	7,254	31 Jan 2025	Direct
transaction	BIIB	Common Stock	Tax liability	$83,192	-578	-8%	$143.93	6,676	31 Jan 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	-1,828	-50%	$0.000000	1,829	31 Jan 2025	Common Stock	1,828	$0.000000	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This award was granted to the reporting person on February 1, 2023 and will vest in three equal installments on each anniversary of the grant date.