Stephen Sherwin - Mar 7, 2025 Form 4 Insider Report for BIOGEN INC. (BIIB)

Role: Director
Signature: /s/ Wendell Taylor, Attorney in Fact for Stephen Sherwin
Stock symbol: BIIB
Transactions as of: Mar 7, 2025
Transactions value $: -$1,314,142
Form type: 4
Date filed: 3/10/2025, 04:09 PM
Previous filing: Feb 14, 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	Sale	-$1.31M	-8.76K	-43.63%	$150.02	11.3K	Mar 7, 2025	Direct

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

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).