State Street Corp - Sep 30, 2025 SCHEDULE 13G Report for BIOGEN INC COMMON STOCK (BIIB)

Filing Manager: STATE STREET CORP
Reporting Manager: STATE STREET CORPORATION
Security: BIOGEN INC COMMON STOCK
Symbol: BIIB
Shares outstanding: 146M shares
Disclosed Ownership: 7.32M shares
Ownership: 5%
Form type: SCHEDULE 13G
Date filed: 11/10/2025, 08:15 AM
Date of event: Sep 30, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
STATE STREET CORPORATION	5%	7.32M	0	4.67M	ELIZABETH SCHAEFER	SENIOR VICE PRESIDENT, CHIEF ACCOUNTING OFFICER