BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Advisors Asset Management, Inc.'s Holding History (CIK: 0001297376)

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

Q4 2025

Shares 6,212 Value ($000) $1,093 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 6,080 Value ($000) $852 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 5,713 Value ($000) $717 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 6,384 Value ($000) $874 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 6,623 Value ($000) $1,013 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 6,696 Value ($000) $1,298 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 6,549 Value ($000) $1,518 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 7,441 Value ($000) $1,605 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 6,990 Value ($000) $1,809 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 5,870 Value ($000) $1,509 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 5,886 Value ($000) $1,677 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 5,314 Value ($000) $1,477 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 5,472 Value ($000) $1,515 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 5,706 Value ($000) $1,524 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 5,371 Value ($000) $1,095 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 4,373 Value ($000) $921 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 5,284 Value ($000) $1,268 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 5,048 Value ($000) $1,429 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 4,993 Value ($000) $1,729 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 4,486 Value ($000) $1,255 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 3,126 Value ($000) $765 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 1,664 Value ($000) $472 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 1,588 Value ($000) $425 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 1,954 Value ($000) $618 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 2,442 Value ($000) $725 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 3,012 Value ($000) $701 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 4,508 Value ($000) $1,054 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 5,093 Value ($000) $1,204 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 6,380 Value ($000) $1,920 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 14,267 Value ($000) $5,041 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 15,096 Value ($000) $4,381 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 13,981 Value ($000) $4,030 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 13,802 Value ($000) $4,397 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 13,337 Value ($000) $4,176 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 8,177 Value ($000) $2,219 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 8,158 Value ($000) $2,231 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 13,737 Value ($000) $3,896 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 19,140 Value ($000) $5,991 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 23,125 Value ($000) $5,592 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 24,619 Value ($000) $6,409 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 27,925 Value ($000) $8,555 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 26,442 Value ($000) $7,716 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 20,324 Value ($000) $8,210 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 17,466 Value ($000) $7,375 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 15,876 Value ($000) $5,389 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 15,133 Value ($000) $5,006 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 14,604 Value ($000) $4,605 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 15,843 Value ($000) $4,846 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 16,748 Value ($000) $4,685 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 17,947 Value ($000) $4,321 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 19,847 Value ($000) $4,271 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,212	$1,093	$163.37	$138.00 - $185.17
Q3 2025	6,080	$852	$135.17	$121.05 - $150.28
Q2 2025	5,713	$717	$124.60	$110.04 - $137.32
Q1 2025	6,384	$874	$142.96	$128.51 - $157.09
Q4 2024	6,623	$1,013	$168.67	$145.07 - $195.00
Q3 2024	6,696	$1,298	$209.21	$188.78 - $238.00
Q2 2024	6,549	$1,518	$217.32	$189.44 - $237.54
Q1 2024	7,441	$1,605	$234.20	$211.02 - $268.30
Q4 2023	6,990	$1,809	$245.62	$220.86 - $269.43
Q3 2023	5,870	$1,509	$267.47	$251.85 - $287.60
Q2 2023	5,886	$1,677	$297.86	$273.39 - $319.76
Q1 2023	5,314	$1,477	$276.70	$254.80 - $295.90
Q4 2022	5,472	$1,515	$282.44	$250.31 - $311.88
Q3 2022	5,706	$1,524	$212.38	$193.65 - $283.44
Q2 2022	5,371	$1,095	$204.43	$187.16 - $225.50
Q1 2022	4,373	$921	$217.46	$192.67 - $249.00
Q4 2021	5,284	$1,268	$257.12	$221.72 - $290.76
Q3 2021	5,048	$1,429	$327.75	$282.64 - $372.12
Q2 2021	4,993	$1,729	$302.94	$257.03 - $468.55
Q1 2021	4,486	$1,255	$269.69	$238.40 - $296.38
Q4 2020	3,126	$765	$259.08	$223.25 - $363.92
Q3 2020	1,664	$472	$278.91	$261.87 - $312.00
Q2 2020	1,588	$425	$300.59	$257.60 - $350.24
Q1 2020	1,954	$618	$303.47	$262.25 - $374.99
Q4 2019	2,442	$725	$277.46	$219.70 - $318.00
Q3 2019	3,012	$701	$232.85	$215.78 - $246.99
Q2 2019	4,508	$1,054	$230.90	$219.20 - $245.35
Q1 2019	5,093	$1,204	$314.89	$216.12 - $344.00
Q4 2018	6,380	$1,920	$319.14	$278.46 - $358.41
Q3 2018	14,267	$5,041	$344.30	$288.13 - $388.67
Q2 2018	15,096	$4,381	$281.15	$249.17 - $310.91
Q1 2018	13,981	$4,030	$310.41	$259.76 - $370.57
Q4 2017	13,802	$4,397	$320.80	$301.81 - $348.84
Q3 2017	13,337	$4,176	$296.11	$269.50 - $330.00
Q2 2017	8,177	$2,219	$264.42	$244.28 - $291.90
Q1 2017	8,158	$2,231	$282.75	$260.50 - $301.42
Q4 2016	13,737	$3,896	$296.43	$268.00 - $329.83
Q3 2016	19,140	$5,991	$296.18	$240.07 - $333.65
Q2 2016	23,125	$5,592	$263.54	$223.02 - $292.69
Q1 2016	24,619	$6,409	$264.15	$242.07 - $301.02
Q4 2015	27,925	$8,555	$287.35	$254.00 - $311.65
Q3 2015	26,442	$7,716	$330.23	$265.00 - $412.24
Q2 2015	20,324	$8,210	$401.33	$368.88 - $432.88
Q1 2015	17,466	$7,375	$394.14	$334.40 - $480.18
Q4 2014	15,876	$5,389	$323.51	$290.85 - $361.93
Q3 2014	15,133	$5,006	$329.72	$298.31 - $349.00
Q2 2014	14,604	$4,605	$300.97	$272.02 - $322.25
Q1 2014	15,843	$4,846	$317.43	$270.62 - $358.89
Q4 2013	16,748	$4,685	$258.65	$221.07 - $298.82
Q3 2013	17,947	$4,321	$223.81	$203.55 - $248.95
Q2 2013	19,847	$4,271	$213.68	$191.80 - $242.64