BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q3 2024

Shares 3,504 Value ($000) $679 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 931 Value ($000) $216 Avg Close $217.32 Range $189.44 - $237.54

Q3 2022

Shares 330,000 Value ($000) $88,110 Avg Close $212.38 Range $193.65 - $283.44

Q1 2021

Shares 310,000 Value ($000) $86,723 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 448,000 Value ($000) $109,697 Avg Close $259.08 Range $223.25 - $363.92

Q3 2015

Shares 5,500 Value ($000) $1,605 Avg Close $330.23 Range $265.00 - $412.24

Q1 2014

Shares 11,750 Value ($000) $3,594 Avg Close $317.43 Range $270.62 - $358.89

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2024	3,504	$679	$209.21	$188.78 - $238.00
Q2 2024	931	$216	$217.32	$189.44 - $237.54
Q3 2022	330,000	$88,110	$212.38	$193.65 - $283.44
Q1 2021	310,000	$86,723	$269.69	$238.40 - $296.38
Q4 2020	448,000	$109,697	$259.08	$223.25 - $363.92
Q3 2015	5,500	$1,605	$330.23	$265.00 - $412.24
Q1 2014	11,750	$3,594	$317.43	$270.62 - $358.89