BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Koss-Olinger Consulting, LLC's Holding History (CIK: 0001861163)

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

Q3 2025

Shares 7,256 Value ($000) $911 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 7,256 Value ($000) $911 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 7,298 Value ($000) $999 Avg Close $142.96 Range $128.51 - $157.09

Q1 2021

Shares 3,608 Value ($000) $1,009 Avg Close $269.69 Range $238.40 - $296.38

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	7,256	$911	$135.17	$121.05 - $150.28
Q2 2025	7,256	$911	$124.60	$110.04 - $137.32
Q1 2025	7,298	$999	$142.96	$128.51 - $157.09
Q1 2021	3,608	$1,009	$269.69	$238.40 - $296.38