Robin Kramer - 01 Jul 2021 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Chief Accounting Officer
Signature: /s/ Suzanne Murray, Attorney in Fact for Robin C. Kramer
Issuer symbol: BIIB
Transactions as of: 01 Jul 2021
Net transactions value: +$61,759
Form type: 4
Filing time: 02 Jul 2021, 16:34:26 UTC
Previous filing: 09 Jun 2021
Next filing: 07 Dec 2021
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	$87,579	+251	+36%	$348.92	945	01 Jul 2021	Direct
transaction	BIIB	Common Stock	Tax liability	$25,820	-74	-7.8%	$348.92	871	01 Jul 2021	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	Options Exercise	$0	-251	-33%	$0.000000	504	01 Jul 2021	Common Stock	251	$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 102.902 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2021.
F2	The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 07/01/2020.