BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Mitsubishi UFJ Kokusai Asset Management Co., Ltd.'s Holding History (CIK: 0001466546)

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

Q4 2025

Shares 319,909 Value ($000) $56,886 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 307,379 Value ($000) $43,058 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 294,269 Value ($000) $36,957 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 273,548 Value ($000) $37,432 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 245,814 Value ($000) $37,415 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 223,632 Value ($000) $43,349 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 203,096 Value ($000) $47,082 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 179,419 Value ($000) $38,688 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 149,428 Value ($000) $39,364 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 141,745 Value ($000) $36,430 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 127,771 Value ($000) $36,396 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 119,576 Value ($000) $33,246 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 111,469 Value ($000) $30,390 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 97,688 Value ($000) $26,083 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 90,397 Value ($000) $18,436 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 84,566 Value ($000) $17,810 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 77,765 Value ($000) $18,986 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 66,991 Value ($000) $18,958 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 59,896 Value ($000) $20,740 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 53,657 Value ($000) $15,011 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 47,540 Value ($000) $11,641 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 46,830 Value ($000) $13,285 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 44,052 Value ($000) $11,786 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 39,838 Value ($000) $12,604 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 41,079 Value ($000) $11,948 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 36,053 Value ($000) $8,394 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 35,354 Value ($000) $8,268 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 28,857 Value ($000) $6,821 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 27,097 Value ($000) $8,319 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 30,374 Value ($000) $10,731 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 32,224 Value ($000) $9,353 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 41,551 Value ($000) $11,377 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 34,840 Value ($000) $11,840 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 34,538 Value ($000) $10,815 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 35,660 Value ($000) $9,677 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 69,612 Value ($000) $19,033 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 66,094 Value ($000) $19,280 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 71,513 Value ($000) $22,386 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 71,248 Value ($000) $17,229 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 65,783 Value ($000) $17,125 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 60,381 Value ($000) $18,498 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 80,597 Value ($000) $23,519 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 65,697 Value ($000) $26,538 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 74,573 Value ($000) $31,488 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 61,947 Value ($000) $21,186 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 59,219 Value ($000) $19,590 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 72,622 Value ($000) $22,898 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 57,205 Value ($000) $17,497 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 54,018 Value ($000) $14,985 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 68,640 Value ($000) $16,526 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 60,450 Value ($000) $13,009 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	319,909	$56,886	$163.37	$138.00 - $185.17
Q3 2025	307,379	$43,058	$135.17	$121.05 - $150.28
Q2 2025	294,269	$36,957	$124.60	$110.04 - $137.32
Q1 2025	273,548	$37,432	$142.96	$128.51 - $157.09
Q4 2024	245,814	$37,415	$168.67	$145.07 - $195.00
Q3 2024	223,632	$43,349	$209.21	$188.78 - $238.00
Q2 2024	203,096	$47,082	$217.32	$189.44 - $237.54
Q1 2024	179,419	$38,688	$234.20	$211.02 - $268.30
Q4 2023	149,428	$39,364	$245.62	$220.86 - $269.43
Q3 2023	141,745	$36,430	$267.47	$251.85 - $287.60
Q2 2023	127,771	$36,396	$297.86	$273.39 - $319.76
Q1 2023	119,576	$33,246	$276.70	$254.80 - $295.90
Q4 2022	111,469	$30,390	$282.44	$250.31 - $311.88
Q3 2022	97,688	$26,083	$212.38	$193.65 - $283.44
Q2 2022	90,397	$18,436	$204.43	$187.16 - $225.50
Q1 2022	84,566	$17,810	$217.46	$192.67 - $249.00
Q4 2021	77,765	$18,986	$257.12	$221.72 - $290.76
Q3 2021	66,991	$18,958	$327.75	$282.64 - $372.12
Q2 2021	59,896	$20,740	$302.94	$257.03 - $468.55
Q1 2021	53,657	$15,011	$269.69	$238.40 - $296.38
Q4 2020	47,540	$11,641	$259.08	$223.25 - $363.92
Q3 2020	46,830	$13,285	$278.91	$261.87 - $312.00
Q2 2020	44,052	$11,786	$300.59	$257.60 - $350.24
Q1 2020	39,838	$12,604	$303.47	$262.25 - $374.99
Q4 2019	41,079	$11,948	$277.46	$219.70 - $318.00
Q3 2019	36,053	$8,394	$232.85	$215.78 - $246.99
Q2 2019	35,354	$8,268	$230.90	$219.20 - $245.35
Q1 2019	28,857	$6,821	$314.89	$216.12 - $344.00
Q4 2018	27,097	$8,319	$319.14	$278.46 - $358.41
Q3 2018	30,374	$10,731	$344.30	$288.13 - $388.67
Q2 2018	32,224	$9,353	$281.15	$249.17 - $310.91
Q1 2018	41,551	$11,377	$310.41	$259.76 - $370.57
Q4 2017	34,840	$11,840	$320.80	$301.81 - $348.84
Q3 2017	34,538	$10,815	$296.11	$269.50 - $330.00
Q2 2017	35,660	$9,677	$264.42	$244.28 - $291.90
Q1 2017	69,612	$19,033	$282.75	$260.50 - $301.42
Q4 2016	66,094	$19,280	$296.43	$268.00 - $329.83
Q3 2016	71,513	$22,386	$296.18	$240.07 - $333.65
Q2 2016	71,248	$17,229	$263.54	$223.02 - $292.69
Q1 2016	65,783	$17,125	$264.15	$242.07 - $301.02
Q4 2015	60,381	$18,498	$287.35	$254.00 - $311.65
Q3 2015	80,597	$23,519	$330.23	$265.00 - $412.24
Q2 2015	65,697	$26,538	$401.33	$368.88 - $432.88
Q1 2015	74,573	$31,488	$394.14	$334.40 - $480.18
Q4 2014	61,947	$21,186	$323.51	$290.85 - $361.93
Q3 2014	59,219	$19,590	$329.72	$298.31 - $349.00
Q2 2014	72,622	$22,898	$300.97	$272.02 - $322.25
Q1 2014	57,205	$17,497	$317.43	$270.62 - $358.89
Q4 2013	54,018	$14,985	$258.65	$221.07 - $298.82
Q3 2013	68,640	$16,526	$223.81	$203.55 - $248.95
Q2 2013	60,450	$13,009	$213.68	$191.80 - $242.64