BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Fortitude Family Office, LLC's Holding History (CIK: 0001950506)

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

Q4 2025

Shares 32 Value ($000) $6 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 20 Value ($000) $3 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 20 Value ($000) $3 Avg Close $124.60 Range $110.04 - $137.32

Q3 2024

Shares 12 Value ($000) $2 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 12 Value ($000) $3 Avg Close $217.32 Range $189.44 - $237.54

Q4 2023

Shares 7 Value ($000) $2 Avg Close $245.62 Range $220.86 - $269.43

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	32	$6	$163.37	$138.00 - $185.17
Q3 2025	20	$3	$135.17	$121.05 - $150.28
Q2 2025	20	$3	$124.60	$110.04 - $137.32
Q3 2024	12	$2	$209.21	$188.78 - $238.00
Q2 2024	12	$3	$217.32	$189.44 - $237.54
Q4 2023	7	$2	$245.62	$220.86 - $269.43