Info
Insider Ownership

Insider Trading & Ownership of Christopher Viehbacher

Location: Cambridge, MA
Summary: The estimated net worth of Christopher Viehbacher is at least $5,469,939 dollars as of 03 Dec 2025. Christopher Viehbacher is the President and CEO, Director of BIOGEN INC. and owns shares of BIOGEN INC. (BIIB) stock worth about $5.47M.
Signature: /s/ Wendell Taylor, attorney-in-fact for Christopher A. Viehbacher
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Ownership of Christopher Viehbacher

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
BIIB	BIOGEN INC.	President and CEO, Director	$5,469,939			01 Dec 2025

Insider Transactions Reported by Christopher Viehbacher:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

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