BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

FIRST TRUST ADVISORS LP's Holding History (CIK: 0001125816)

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

Q4 2025

Shares 565,847 Value ($000) $99,583 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 840,557 Value ($000) $117,745 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 873,823 Value ($000) $109,744 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 661,420 Value ($000) $90,509 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 511,280 Value ($000) $78,185 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 358,491 Value ($000) $69,490 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 389,951 Value ($000) $90,398 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 334,296 Value ($000) $72,084 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 977,308 Value ($000) $252,898 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 405,513 Value ($000) $104,221 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 411,699 Value ($000) $117,272 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 385,592 Value ($000) $107,206 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 275,283 Value ($000) $76,230 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 388,976 Value ($000) $103,856 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 439,401 Value ($000) $89,611 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 397,521 Value ($000) $83,718 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 345,349 Value ($000) $82,856 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 328,808 Value ($000) $93,049 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 432,106 Value ($000) $149,625 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 421,659 Value ($000) $117,959 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 413,218 Value ($000) $101,181 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 433,441 Value ($000) $122,959 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 397,666 Value ($000) $106,396 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 480,588 Value ($000) $152,048 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 542,423 Value ($000) $160,953 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 423,912 Value ($000) $98,695 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 578,406 Value ($000) $135,272 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 406,551 Value ($000) $96,101 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 381,816 Value ($000) $114,896 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 341,459 Value ($000) $120,641 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 255,954 Value ($000) $74,288 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 235,346 Value ($000) $64,442 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 209,345 Value ($000) $66,691 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 222,160 Value ($000) $69,563 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 146,965 Value ($000) $39,880 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 160,061 Value ($000) $43,764 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 199,061 Value ($000) $56,450 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 126,228 Value ($000) $39,513 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 134,116 Value ($000) $32,432 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 137,145 Value ($000) $35,702 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 408,831 Value ($000) $125,245 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 458,300 Value ($000) $133,737 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 508,733 Value ($000) $205,498 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 341,875 Value ($000) $144,353 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 383,756 Value ($000) $130,266 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 364,173 Value ($000) $120,472 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 353,501 Value ($000) $111,462 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 350,879 Value ($000) $107,323 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 267,792 Value ($000) $74,867 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 291,367 Value ($000) $70,150 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 241,367 Value ($000) $51,942 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	565,847	$99,583	$163.37	$138.00 - $185.17
Q3 2025	840,557	$117,745	$135.17	$121.05 - $150.28
Q2 2025	873,823	$109,744	$124.60	$110.04 - $137.32
Q1 2025	661,420	$90,509	$142.96	$128.51 - $157.09
Q4 2024	511,280	$78,185	$168.67	$145.07 - $195.00
Q3 2024	358,491	$69,490	$209.21	$188.78 - $238.00
Q2 2024	389,951	$90,398	$217.32	$189.44 - $237.54
Q1 2024	334,296	$72,084	$234.20	$211.02 - $268.30
Q4 2023	977,308	$252,898	$245.62	$220.86 - $269.43
Q3 2023	405,513	$104,221	$267.47	$251.85 - $287.60
Q2 2023	411,699	$117,272	$297.86	$273.39 - $319.76
Q1 2023	385,592	$107,206	$276.70	$254.80 - $295.90
Q4 2022	275,283	$76,230	$282.44	$250.31 - $311.88
Q3 2022	388,976	$103,856	$212.38	$193.65 - $283.44
Q2 2022	439,401	$89,611	$204.43	$187.16 - $225.50
Q1 2022	397,521	$83,718	$217.46	$192.67 - $249.00
Q4 2021	345,349	$82,856	$257.12	$221.72 - $290.76
Q3 2021	328,808	$93,049	$327.75	$282.64 - $372.12
Q2 2021	432,106	$149,625	$302.94	$257.03 - $468.55
Q1 2021	421,659	$117,959	$269.69	$238.40 - $296.38
Q4 2020	413,218	$101,181	$259.08	$223.25 - $363.92
Q3 2020	433,441	$122,959	$278.91	$261.87 - $312.00
Q2 2020	397,666	$106,396	$300.59	$257.60 - $350.24
Q1 2020	480,588	$152,048	$303.47	$262.25 - $374.99
Q4 2019	542,423	$160,953	$277.46	$219.70 - $318.00
Q3 2019	423,912	$98,695	$232.85	$215.78 - $246.99
Q2 2019	578,406	$135,272	$230.90	$219.20 - $245.35
Q1 2019	406,551	$96,101	$314.89	$216.12 - $344.00
Q4 2018	381,816	$114,896	$319.14	$278.46 - $358.41
Q3 2018	341,459	$120,641	$344.30	$288.13 - $388.67
Q2 2018	255,954	$74,288	$281.15	$249.17 - $310.91
Q1 2018	235,346	$64,442	$310.41	$259.76 - $370.57
Q4 2017	209,345	$66,691	$320.80	$301.81 - $348.84
Q3 2017	222,160	$69,563	$296.11	$269.50 - $330.00
Q2 2017	146,965	$39,880	$264.42	$244.28 - $291.90
Q1 2017	160,061	$43,764	$282.75	$260.50 - $301.42
Q4 2016	199,061	$56,450	$296.43	$268.00 - $329.83
Q3 2016	126,228	$39,513	$296.18	$240.07 - $333.65
Q2 2016	134,116	$32,432	$263.54	$223.02 - $292.69
Q1 2016	137,145	$35,702	$264.15	$242.07 - $301.02
Q4 2015	408,831	$125,245	$287.35	$254.00 - $311.65
Q3 2015	458,300	$133,737	$330.23	$265.00 - $412.24
Q2 2015	508,733	$205,498	$401.33	$368.88 - $432.88
Q1 2015	341,875	$144,353	$394.14	$334.40 - $480.18
Q4 2014	383,756	$130,266	$323.51	$290.85 - $361.93
Q3 2014	364,173	$120,472	$329.72	$298.31 - $349.00
Q2 2014	353,501	$111,462	$300.97	$272.02 - $322.25
Q1 2014	350,879	$107,323	$317.43	$270.62 - $358.89
Q4 2013	267,792	$74,867	$258.65	$221.07 - $298.82
Q3 2013	291,367	$70,150	$223.81	$203.55 - $248.95
Q2 2013	241,367	$51,942	$213.68	$191.80 - $242.64