BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PEAK6 LLC's Holding History (CIK: 0001389958)

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

Q2 2025

Shares 17,286 Value ($000) $2,171 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 30,622 Value ($000) $4,190 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 8,751 Value ($000) $1,338 Avg Close $168.67 Range $145.07 - $195.00

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	17,286	$2,171	$124.60	$110.04 - $137.32
Q1 2025	30,622	$4,190	$142.96	$128.51 - $157.09
Q4 2024	8,751	$1,338	$168.67	$145.07 - $195.00