Jane Grogan - 01 Nov 2024 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Head of Research
Signature: /s/ Samuel Ntonme, attorney-in-fact for Dr. Grogan
Issuer symbol: BIIB
Transactions as of: 01 Nov 2024
Net transactions value: -$35,453
Form type: 4
Filing time: 04 Nov 2024, 16:39:18 UTC
Previous filing: 09 Feb 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	+695		$0.000000	695	01 Nov 2024	Direct
transaction	BIIB	Common Stock	Tax liability	$35,453	-204	-29%	$173.79	491	01 Nov 2024	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	-695	-33%	$0.000000	1,390	01 Nov 2024	Common Stock	695	$0.000000	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of November 1, 2023.