BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q4 2025

Shares 30,878 Value ($000) $5,434 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 1,116 Value ($000) $0 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 6,599 Value ($000) $1 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 3,159 Value ($000) $0 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 33,542 Value ($000) $5 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 53,118 Value ($000) $10 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 20,713 Value ($000) $5 Avg Close $217.32 Range $189.44 - $237.54

Q3 2023

Shares 1,447 Value ($000) $0 Avg Close $267.47 Range $251.85 - $287.60

Q2 2022

Shares 3,774 Value ($000) $769 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 9,350 Value ($000) $1,969 Avg Close $217.46 Range $192.67 - $249.00

Q1 2021

Shares 43,137 Value ($000) $0 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 45,903 Value ($000) $11,239 Avg Close $259.08 Range $223.25 - $363.92

Q3 2019

Shares 68,075 Value ($000) $15,849 Avg Close $232.85 Range $215.78 - $246.99

Q2 2018

Shares 1,620 Value ($000) $470 Avg Close $281.15 Range $249.17 - $310.91

Q4 2017

Shares 13,807 Value ($000) $4,398 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 7,879 Value ($000) $2,467 Avg Close $296.11 Range $269.50 - $330.00

Q1 2017

Shares 22,270 Value ($000) $6,089 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 17,930 Value ($000) $5,084 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 43,761 Value ($000) $13,698 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 56,467 Value ($000) $13,654 Avg Close $263.54 Range $223.02 - $292.69

Q3 2015

Shares 16,253 Value ($000) $4,742 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 28,956 Value ($000) $11,696 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 6,826 Value ($000) $2,882 Avg Close $394.14 Range $334.40 - $480.18

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	30,878	$5,434	$163.37	$138.00 - $185.17
Q3 2025	1,116	$0	$135.17	$121.05 - $150.28
Q2 2025	6,599	$1	$124.60	$110.04 - $137.32
Q1 2025	3,159	$0	$142.96	$128.51 - $157.09
Q4 2024	33,542	$5	$168.67	$145.07 - $195.00
Q3 2024	53,118	$10	$209.21	$188.78 - $238.00
Q2 2024	20,713	$5	$217.32	$189.44 - $237.54
Q3 2023	1,447	$0	$267.47	$251.85 - $287.60
Q2 2022	3,774	$769	$204.43	$187.16 - $225.50
Q1 2022	9,350	$1,969	$217.46	$192.67 - $249.00
Q1 2021	43,137	$0	$269.69	$238.40 - $296.38
Q4 2020	45,903	$11,239	$259.08	$223.25 - $363.92
Q3 2019	68,075	$15,849	$232.85	$215.78 - $246.99
Q2 2018	1,620	$470	$281.15	$249.17 - $310.91
Q4 2017	13,807	$4,398	$320.80	$301.81 - $348.84
Q3 2017	7,879	$2,467	$296.11	$269.50 - $330.00
Q1 2017	22,270	$6,089	$282.75	$260.50 - $301.42
Q4 2016	17,930	$5,084	$296.43	$268.00 - $329.83
Q3 2016	43,761	$13,698	$296.18	$240.07 - $333.65
Q2 2016	56,467	$13,654	$263.54	$223.02 - $292.69
Q3 2015	16,253	$4,742	$330.23	$265.00 - $412.24
Q2 2015	28,956	$11,696	$401.33	$368.88 - $432.88
Q1 2015	6,826	$2,882	$394.14	$334.40 - $480.18