Priya Singhal - 10 Feb 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: 10 Feb 2025
Net transactions value: -$50,887
Form type: 4
Filing time: 12 Feb 2025, 17:48:14 UTC
Previous filing: 10 Feb 2025
Next filing: 20 May 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	+1,212	+15%	$0.000000	9,423	10 Feb 2025	Direct
transaction	BIIB	Common Stock	Tax liability	$50,887	-357	-3.8%	$142.54	9,066	10 Feb 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	-1,212	-100%	$0.000000	0	10 Feb 2025	Common Stock	1,212	$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 10, 2022 and will vest in three equal installments on each anniversary of the grant date.