BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

TOKIO MARINE ASSET MANAGEMENT CO LTD's Holding History (CIK: 0001504169)

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

Q4 2025

Shares 5,569 Value ($000) $980 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 5,569 Value ($000) $780 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 5,569 Value ($000) $699 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 5,173 Value ($000) $708 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 4,272 Value ($000) $653 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 4,272 Value ($000) $828 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 3,518 Value ($000) $816 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 3,408 Value ($000) $735 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 2,943 Value ($000) $762 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 2,943 Value ($000) $756 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 2,943 Value ($000) $838 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 2,769 Value ($000) $770 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 2,526 Value ($000) $700 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 2,217 Value ($000) $592 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 1,932 Value ($000) $394 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 1,747 Value ($000) $368 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 1,805 Value ($000) $433 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 1,538 Value ($000) $435 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 1,362 Value ($000) $472 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 1,083 Value ($000) $303 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 2,478 Value ($000) $607 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 2,408 Value ($000) $683 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 908 Value ($000) $243 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 855 Value ($000) $271 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 684 Value ($000) $203 Avg Close $277.46 Range $219.70 - $318.00

Q4 2018

Shares 13,016 Value ($000) $3,917 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 12,977 Value ($000) $4,585 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 13,017 Value ($000) $3,778 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 13,015 Value ($000) $3,564 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 8,196 Value ($000) $2,611 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 8,649 Value ($000) $2,708 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 9,355 Value ($000) $2,539 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 10,515 Value ($000) $2,875 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 15,570 Value ($000) $4,415 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 21,393 Value ($000) $6,697 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 24,198 Value ($000) $5,852 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 24,440 Value ($000) $6,362 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 23,384 Value ($000) $7,164 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 27,160 Value ($000) $7,926 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 24,387 Value ($000) $9,851 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 22,769 Value ($000) $9,614 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 28,585 Value ($000) $9,703 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 42,870 Value ($000) $14,182 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 45,252 Value ($000) $14,268 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 26,433 Value ($000) $8,085 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 27,304 Value ($000) $7,633 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 28,740 Value ($000) $6,919 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 32,251 Value ($000) $6,940 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5,569	$980	$163.37	$138.00 - $185.17
Q3 2025	5,569	$780	$135.17	$121.05 - $150.28
Q2 2025	5,569	$699	$124.60	$110.04 - $137.32
Q1 2025	5,173	$708	$142.96	$128.51 - $157.09
Q4 2024	4,272	$653	$168.67	$145.07 - $195.00
Q3 2024	4,272	$828	$209.21	$188.78 - $238.00
Q2 2024	3,518	$816	$217.32	$189.44 - $237.54
Q1 2024	3,408	$735	$234.20	$211.02 - $268.30
Q4 2023	2,943	$762	$245.62	$220.86 - $269.43
Q3 2023	2,943	$756	$267.47	$251.85 - $287.60
Q2 2023	2,943	$838	$297.86	$273.39 - $319.76
Q1 2023	2,769	$770	$276.70	$254.80 - $295.90
Q4 2022	2,526	$700	$282.44	$250.31 - $311.88
Q3 2022	2,217	$592	$212.38	$193.65 - $283.44
Q2 2022	1,932	$394	$204.43	$187.16 - $225.50
Q1 2022	1,747	$368	$217.46	$192.67 - $249.00
Q4 2021	1,805	$433	$257.12	$221.72 - $290.76
Q3 2021	1,538	$435	$327.75	$282.64 - $372.12
Q2 2021	1,362	$472	$302.94	$257.03 - $468.55
Q1 2021	1,083	$303	$269.69	$238.40 - $296.38
Q4 2020	2,478	$607	$259.08	$223.25 - $363.92
Q3 2020	2,408	$683	$278.91	$261.87 - $312.00
Q2 2020	908	$243	$300.59	$257.60 - $350.24
Q1 2020	855	$271	$303.47	$262.25 - $374.99
Q4 2019	684	$203	$277.46	$219.70 - $318.00
Q4 2018	13,016	$3,917	$319.14	$278.46 - $358.41
Q3 2018	12,977	$4,585	$344.30	$288.13 - $388.67
Q2 2018	13,017	$3,778	$281.15	$249.17 - $310.91
Q1 2018	13,015	$3,564	$310.41	$259.76 - $370.57
Q4 2017	8,196	$2,611	$320.80	$301.81 - $348.84
Q3 2017	8,649	$2,708	$296.11	$269.50 - $330.00
Q2 2017	9,355	$2,539	$264.42	$244.28 - $291.90
Q1 2017	10,515	$2,875	$282.75	$260.50 - $301.42
Q4 2016	15,570	$4,415	$296.43	$268.00 - $329.83
Q3 2016	21,393	$6,697	$296.18	$240.07 - $333.65
Q2 2016	24,198	$5,852	$263.54	$223.02 - $292.69
Q1 2016	24,440	$6,362	$264.15	$242.07 - $301.02
Q4 2015	23,384	$7,164	$287.35	$254.00 - $311.65
Q3 2015	27,160	$7,926	$330.23	$265.00 - $412.24
Q2 2015	24,387	$9,851	$401.33	$368.88 - $432.88
Q1 2015	22,769	$9,614	$394.14	$334.40 - $480.18
Q4 2014	28,585	$9,703	$323.51	$290.85 - $361.93
Q3 2014	42,870	$14,182	$329.72	$298.31 - $349.00
Q2 2014	45,252	$14,268	$300.97	$272.02 - $322.25
Q1 2014	26,433	$8,085	$317.43	$270.62 - $358.89
Q4 2013	27,304	$7,633	$258.65	$221.07 - $298.82
Q3 2013	28,740	$6,919	$223.81	$203.55 - $248.95
Q2 2013	32,251	$6,940	$213.68	$191.80 - $242.64