BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Rafferty Asset Management, LLC's Holding History (CIK: 0001389426)

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

Q4 2025

Shares 48,559 Value ($000) $8,546 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 158,627 Value ($000) $22,220 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 180,440 Value ($000) $22,661 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 180,775 Value ($000) $24,737 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 189,520 Value ($000) $28,981 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 160,201 Value ($000) $31,053 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 151,295 Value ($000) $35,073 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 112,816 Value ($000) $24,327 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 95,882 Value ($000) $24,811 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 82,547 Value ($000) $21,215 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 64,793 Value ($000) $18,456 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 59,165 Value ($000) $16,450 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 56,371 Value ($000) $15,610 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 72,830 Value ($000) $19,446 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 54,935 Value ($000) $11,203 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 63,234 Value ($000) $13,317 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 44,960 Value ($000) $10,787 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 29,167 Value ($000) $8,254 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 19,449 Value ($000) $6,735 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 29,096 Value ($000) $8,140 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 21,741 Value ($000) $5,324 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 20,884 Value ($000) $5,924 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 18,069 Value ($000) $4,834 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 11,213 Value ($000) $3,548 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 26,046 Value ($000) $7,729 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 36,657 Value ($000) $8,534 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 40,096 Value ($000) $9,377 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 28,859 Value ($000) $6,822 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 5,578 Value ($000) $1,679 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 6,069 Value ($000) $2,144 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 14,667 Value ($000) $4,257 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 8,915 Value ($000) $2,441 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 4,532 Value ($000) $1,444 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 4,867 Value ($000) $1,524 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 5,681 Value ($000) $1,542 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 4,165 Value ($000) $1,139 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 3,516 Value ($000) $997 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 2,412 Value ($000) $755 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 2,468 Value ($000) $0 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 3,106 Value ($000) $809 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 9,277 Value ($000) $2,860 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 7,744 Value ($000) $2,260 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 2,539 Value ($000) $1,026 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 2,770 Value ($000) $1,170 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 1,616 Value ($000) $549 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 1,320 Value ($000) $437 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 763 Value ($000) $241 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 1,283 Value ($000) $392 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 1,444 Value ($000) $404 Avg Close $258.65 Range $221.07 - $298.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	48,559	$8,546	$163.37	$138.00 - $185.17
Q3 2025	158,627	$22,220	$135.17	$121.05 - $150.28
Q2 2025	180,440	$22,661	$124.60	$110.04 - $137.32
Q1 2025	180,775	$24,737	$142.96	$128.51 - $157.09
Q4 2024	189,520	$28,981	$168.67	$145.07 - $195.00
Q3 2024	160,201	$31,053	$209.21	$188.78 - $238.00
Q2 2024	151,295	$35,073	$217.32	$189.44 - $237.54
Q1 2024	112,816	$24,327	$234.20	$211.02 - $268.30
Q4 2023	95,882	$24,811	$245.62	$220.86 - $269.43
Q3 2023	82,547	$21,215	$267.47	$251.85 - $287.60
Q2 2023	64,793	$18,456	$297.86	$273.39 - $319.76
Q1 2023	59,165	$16,450	$276.70	$254.80 - $295.90
Q4 2022	56,371	$15,610	$282.44	$250.31 - $311.88
Q3 2022	72,830	$19,446	$212.38	$193.65 - $283.44
Q2 2022	54,935	$11,203	$204.43	$187.16 - $225.50
Q1 2022	63,234	$13,317	$217.46	$192.67 - $249.00
Q4 2021	44,960	$10,787	$257.12	$221.72 - $290.76
Q3 2021	29,167	$8,254	$327.75	$282.64 - $372.12
Q2 2021	19,449	$6,735	$302.94	$257.03 - $468.55
Q1 2021	29,096	$8,140	$269.69	$238.40 - $296.38
Q4 2020	21,741	$5,324	$259.08	$223.25 - $363.92
Q3 2020	20,884	$5,924	$278.91	$261.87 - $312.00
Q2 2020	18,069	$4,834	$300.59	$257.60 - $350.24
Q1 2020	11,213	$3,548	$303.47	$262.25 - $374.99
Q4 2019	26,046	$7,729	$277.46	$219.70 - $318.00
Q3 2019	36,657	$8,534	$232.85	$215.78 - $246.99
Q2 2019	40,096	$9,377	$230.90	$219.20 - $245.35
Q1 2019	28,859	$6,822	$314.89	$216.12 - $344.00
Q4 2018	5,578	$1,679	$319.14	$278.46 - $358.41
Q3 2018	6,069	$2,144	$344.30	$288.13 - $388.67
Q2 2018	14,667	$4,257	$281.15	$249.17 - $310.91
Q1 2018	8,915	$2,441	$310.41	$259.76 - $370.57
Q4 2017	4,532	$1,444	$320.80	$301.81 - $348.84
Q3 2017	4,867	$1,524	$296.11	$269.50 - $330.00
Q2 2017	5,681	$1,542	$264.42	$244.28 - $291.90
Q1 2017	4,165	$1,139	$282.75	$260.50 - $301.42
Q4 2016	3,516	$997	$296.43	$268.00 - $329.83
Q3 2016	2,412	$755	$296.18	$240.07 - $333.65
Q2 2016	2,468	$0	$263.54	$223.02 - $292.69
Q1 2016	3,106	$809	$264.15	$242.07 - $301.02
Q4 2015	9,277	$2,860	$287.35	$254.00 - $311.65
Q3 2015	7,744	$2,260	$330.23	$265.00 - $412.24
Q2 2015	2,539	$1,026	$401.33	$368.88 - $432.88
Q1 2015	2,770	$1,170	$394.14	$334.40 - $480.18
Q4 2014	1,616	$549	$323.51	$290.85 - $361.93
Q3 2014	1,320	$437	$329.72	$298.31 - $349.00
Q2 2014	763	$241	$300.97	$272.02 - $322.25
Q1 2014	1,283	$392	$317.43	$270.62 - $358.89
Q4 2013	1,444	$404	$258.65	$221.07 - $298.82