BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Polymer Capital Management (US) LLC's Holding History (CIK: 0001973324)

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

Q4 2025

Shares 5,022 Value ($000) $884 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 2,674 Value ($000) $375 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 3,760 Value ($000) $472 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 3,880 Value ($000) $531 Avg Close $142.96 Range $128.51 - $157.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5,022	$884	$163.37	$138.00 - $185.17
Q3 2025	2,674	$375	$135.17	$121.05 - $150.28
Q2 2025	3,760	$472	$124.60	$110.04 - $137.32
Q1 2025	3,880	$531	$142.96	$128.51 - $157.09