BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

SUVRETTA CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001569064)

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

Q4 2025

Shares 132,290 Value ($000) $23,282 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 168,190 Value ($000) $23,560 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 151,890 Value ($000) $19,076 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 120,736 Value ($000) $16,522 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 115,436 Value ($000) $17,652 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 29,946 Value ($000) $5,805 Avg Close $209.21 Range $188.78 - $238.00

Q4 2022

Shares 1,430 Value ($000) $396 Avg Close $282.44 Range $250.31 - $311.88

Q1 2020

Shares 153,670 Value ($000) $48,618 Avg Close $303.47 Range $262.25 - $374.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	132,290	$23,282	$163.37	$138.00 - $185.17
Q3 2025	168,190	$23,560	$135.17	$121.05 - $150.28
Q2 2025	151,890	$19,076	$124.60	$110.04 - $137.32
Q1 2025	120,736	$16,522	$142.96	$128.51 - $157.09
Q4 2024	115,436	$17,652	$168.67	$145.07 - $195.00
Q3 2024	29,946	$5,805	$209.21	$188.78 - $238.00
Q4 2022	1,430	$396	$282.44	$250.31 - $311.88
Q1 2020	153,670	$48,618	$303.47	$262.25 - $374.99