Priya Singhal - 10 Feb 2023 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Head of Development
Signature: /s/ Wendell Taylor, attorney-in-fact for Priya Singhal
Issuer symbol: BIIB
Transactions as of: 10 Feb 2023
Net transactions value: -$106,504
Form type: 4
Filing time: 14 Feb 2023, 20:21:52 UTC
Previous filing: 03 Feb 2023
Next filing: 22 Feb 2023
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	+1,211	+46%	$0.000000	3,863	10 Feb 2023	Direct
transaction	BIIB	Common Stock	Tax liability	$106,504	-372	-9.6%	$286.30	3,491	10 Feb 2023	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	-1,211	-33%	$0.000000	2,424	10 Feb 2023	Common Stock	1,211	$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.