BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025

Shares 385,928 Value ($000) $67,919 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 887,661 Value ($000) $124,344 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 165,955 Value ($000) $20,842 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 5,900 Value ($000) $807 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 79,952 Value ($000) $12,226 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 66,300 Value ($000) $12,852 Avg Close $209.21 Range $188.78 - $238.00

Q1 2024

Shares 23,228 Value ($000) $5,009 Avg Close $234.20 Range $211.02 - $268.30

Q2 2023

Shares 5,055 Value ($000) $1,440 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 532,933 Value ($000) $148,171 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 1,244,150 Value ($000) $344,530 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 150,574 Value ($000) $40,204 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 83,708 Value ($000) $17,070 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 118,259 Value ($000) $24,906 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 27,454 Value ($000) $6,587 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 11,422 Value ($000) $3,232 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 651,320 Value ($000) $225,534 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 162,556 Value ($000) $45,474 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 519,853 Value ($000) $127,292 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 116,585 Value ($000) $33,073 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 47,365 Value ($000) $12,673 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 64,352 Value ($000) $20,360 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 59,722 Value ($000) $17,721 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 11,906 Value ($000) $2,772 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 11,906 Value ($000) $2,784 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 11,906 Value ($000) $2,814 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 11,421 Value ($000) $3,437 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 12,135 Value ($000) $4,287 Avg Close $344.30 Range $288.13 - $388.67

Q4 2017

Shares 20,356 Value ($000) $6,485 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 8,410 Value ($000) $2,632 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 4,778 Value ($000) $1,295 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 3,358 Value ($000) $917 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 88,847 Value ($000) $25,195 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 51,534 Value ($000) $16,132 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 191,541 Value ($000) $46,318 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 12,122 Value ($000) $3,156 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 201,721 Value ($000) $61,797 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 12,365 Value ($000) $3,609 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 123,859 Value ($000) $50,031 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 76,611 Value ($000) $32,349 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 133,866 Value ($000) $45,441 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 12,932 Value ($000) $4,278 Avg Close $329.72 Range $298.31 - $349.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	385,928	$67,919	$163.37	$138.00 - $185.17
Q3 2025	887,661	$124,344	$135.17	$121.05 - $150.28
Q2 2025	165,955	$20,842	$124.60	$110.04 - $137.32
Q1 2025	5,900	$807	$142.96	$128.51 - $157.09
Q4 2024	79,952	$12,226	$168.67	$145.07 - $195.00
Q3 2024	66,300	$12,852	$209.21	$188.78 - $238.00
Q1 2024	23,228	$5,009	$234.20	$211.02 - $268.30
Q2 2023	5,055	$1,440	$297.86	$273.39 - $319.76
Q1 2023	532,933	$148,171	$276.70	$254.80 - $295.90
Q4 2022	1,244,150	$344,530	$282.44	$250.31 - $311.88
Q3 2022	150,574	$40,204	$212.38	$193.65 - $283.44
Q2 2022	83,708	$17,070	$204.43	$187.16 - $225.50
Q1 2022	118,259	$24,906	$217.46	$192.67 - $249.00
Q4 2021	27,454	$6,587	$257.12	$221.72 - $290.76
Q3 2021	11,422	$3,232	$327.75	$282.64 - $372.12
Q2 2021	651,320	$225,534	$302.94	$257.03 - $468.55
Q1 2021	162,556	$45,474	$269.69	$238.40 - $296.38
Q4 2020	519,853	$127,292	$259.08	$223.25 - $363.92
Q3 2020	116,585	$33,073	$278.91	$261.87 - $312.00
Q2 2020	47,365	$12,673	$300.59	$257.60 - $350.24
Q1 2020	64,352	$20,360	$303.47	$262.25 - $374.99
Q4 2019	59,722	$17,721	$277.46	$219.70 - $318.00
Q3 2019	11,906	$2,772	$232.85	$215.78 - $246.99
Q2 2019	11,906	$2,784	$230.90	$219.20 - $245.35
Q1 2019	11,906	$2,814	$314.89	$216.12 - $344.00
Q4 2018	11,421	$3,437	$319.14	$278.46 - $358.41
Q3 2018	12,135	$4,287	$344.30	$288.13 - $388.67
Q4 2017	20,356	$6,485	$320.80	$301.81 - $348.84
Q3 2017	8,410	$2,632	$296.11	$269.50 - $330.00
Q2 2017	4,778	$1,295	$264.42	$244.28 - $291.90
Q1 2017	3,358	$917	$282.75	$260.50 - $301.42
Q4 2016	88,847	$25,195	$296.43	$268.00 - $329.83
Q3 2016	51,534	$16,132	$296.18	$240.07 - $333.65
Q2 2016	191,541	$46,318	$263.54	$223.02 - $292.69
Q1 2016	12,122	$3,156	$264.15	$242.07 - $301.02
Q4 2015	201,721	$61,797	$287.35	$254.00 - $311.65
Q3 2015	12,365	$3,609	$330.23	$265.00 - $412.24
Q2 2015	123,859	$50,031	$401.33	$368.88 - $432.88
Q1 2015	76,611	$32,349	$394.14	$334.40 - $480.18
Q4 2014	133,866	$45,441	$323.51	$290.85 - $361.93
Q3 2014	12,932	$4,278	$329.72	$298.31 - $349.00