BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Logos Global Management LP's Holding History (CIK: 0001792126)

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

Q4 2025

Shares 200,000 Value ($000) $35,198 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 100,000 Value ($000) $14,008 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 200,000 Value ($000) $25,118 Avg Close $124.60 Range $110.04 - $137.32

Q2 2023

Shares 100,000 Value ($000) $28,485 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 100,000 Value ($000) $27,803 Avg Close $276.70 Range $254.80 - $295.90

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	200,000	$35,198	$163.37	$138.00 - $185.17
Q3 2025	100,000	$14,008	$135.17	$121.05 - $150.28
Q2 2025	200,000	$25,118	$124.60	$110.04 - $137.32
Q2 2023	100,000	$28,485	$297.86	$273.39 - $319.76
Q1 2023	100,000	$27,803	$276.70	$254.80 - $295.90