BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

GF FUND MANAGEMENT CO. LTD.'s Holding History (CIK: 0002057060)

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

Q4 2025

Shares 6,880 Value ($000) $1,211 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 36,409 Value ($000) $5,100 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 36,453 Value ($000) $4,578 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 35,435 Value ($000) $4,849 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 34,242 Value ($000) $5,236 Avg Close $168.67 Range $145.07 - $195.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,880	$1,211	$163.37	$138.00 - $185.17
Q3 2025	36,409	$5,100	$135.17	$121.05 - $150.28
Q2 2025	36,453	$4,578	$124.60	$110.04 - $137.32
Q1 2025	35,435	$4,849	$142.96	$128.51 - $157.09
Q4 2024	34,242	$5,236	$168.67	$145.07 - $195.00