BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

MIZUHO SECURITIES USA LLC's Holding History (CIK: 0000812291)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 10,682 Value ($000) $1,945 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 10,678 Value ($000) $1,412 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 10,130 Value ($000) $1,272 Avg Close $124.60 Range $110.04 - $137.32

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	10,682	$1,945	$163.37	$138.00 - $185.17
Q3 2025	10,678	$1,412	$135.17	$121.05 - $150.28
Q2 2025	10,130	$1,272	$124.60	$110.04 - $137.32