BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

LAZARD ASSET MANAGEMENT LLC's Holding History (CIK: 0001207017)

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

Q4 2025

Shares 46,123 Value ($000) $8,117 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 56,836 Value ($000) $7,962 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 58,131 Value ($000) $7 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 58,572 Value ($000) $8 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 54,476 Value ($000) $8 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 23,857 Value ($000) $5 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 20,136 Value ($000) $5 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 22,719 Value ($000) $5 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 25,136 Value ($000) $7 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 25,828 Value ($000) $7 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 14,762 Value ($000) $4 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 15,409 Value ($000) $4 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 15,634 Value ($000) $4 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 14,076 Value ($000) $3,758 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 1,334 Value ($000) $271 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 802 Value ($000) $168 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 4,610 Value ($000) $1,105 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 4,310 Value ($000) $1,219 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 8 Value ($000) $2 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 65 Value ($000) $18 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 58 Value ($000) $14 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 1,549 Value ($000) $439 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 7,444 Value ($000) $1,990 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 55,209 Value ($000) $17,466 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 61,929 Value ($000) $18,375 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 92,836 Value ($000) $21,613 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 91,273 Value ($000) $21,345 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 315,840 Value ($000) $74,657 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 582,727 Value ($000) $175,353 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 589,370 Value ($000) $208,229 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 687,626 Value ($000) $199,574 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 813,251 Value ($000) $222,683 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 735,433 Value ($000) $234,286 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 781,488 Value ($000) $244,698 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 556,977 Value ($000) $151,141 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 389,589 Value ($000) $106,520 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 1,309 Value ($000) $371 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 1,519 Value ($000) $475 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 26,543 Value ($000) $6,418 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 33,215 Value ($000) $8,646 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 42,493 Value ($000) $13,017 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 32,545 Value ($000) $9,496 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 39,464 Value ($000) $15,940 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 42,939 Value ($000) $18,130 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 56,853 Value ($000) $19,298 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 55,023 Value ($000) $18,201 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 38,790 Value ($000) $12,230 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 12,117 Value ($000) $3,706 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 20,391 Value ($000) $5,704 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 20,405 Value ($000) $4,912 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 20,405 Value ($000) $4,391 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	46,123	$8,117	$163.37	$138.00 - $185.17
Q3 2025	56,836	$7,962	$135.17	$121.05 - $150.28
Q2 2025	58,131	$7	$124.60	$110.04 - $137.32
Q1 2025	58,572	$8	$142.96	$128.51 - $157.09
Q4 2024	54,476	$8	$168.67	$145.07 - $195.00
Q3 2024	23,857	$5	$209.21	$188.78 - $238.00
Q2 2024	20,136	$5	$217.32	$189.44 - $237.54
Q1 2024	22,719	$5	$234.20	$211.02 - $268.30
Q4 2023	25,136	$7	$245.62	$220.86 - $269.43
Q3 2023	25,828	$7	$267.47	$251.85 - $287.60
Q2 2023	14,762	$4	$297.86	$273.39 - $319.76
Q1 2023	15,409	$4	$276.70	$254.80 - $295.90
Q4 2022	15,634	$4	$282.44	$250.31 - $311.88
Q3 2022	14,076	$3,758	$212.38	$193.65 - $283.44
Q2 2022	1,334	$271	$204.43	$187.16 - $225.50
Q1 2022	802	$168	$217.46	$192.67 - $249.00
Q4 2021	4,610	$1,105	$257.12	$221.72 - $290.76
Q3 2021	4,310	$1,219	$327.75	$282.64 - $372.12
Q2 2021	8	$2	$302.94	$257.03 - $468.55
Q1 2021	65	$18	$269.69	$238.40 - $296.38
Q4 2020	58	$14	$259.08	$223.25 - $363.92
Q3 2020	1,549	$439	$278.91	$261.87 - $312.00
Q2 2020	7,444	$1,990	$300.59	$257.60 - $350.24
Q1 2020	55,209	$17,466	$303.47	$262.25 - $374.99
Q4 2019	61,929	$18,375	$277.46	$219.70 - $318.00
Q3 2019	92,836	$21,613	$232.85	$215.78 - $246.99
Q2 2019	91,273	$21,345	$230.90	$219.20 - $245.35
Q1 2019	315,840	$74,657	$314.89	$216.12 - $344.00
Q4 2018	582,727	$175,353	$319.14	$278.46 - $358.41
Q3 2018	589,370	$208,229	$344.30	$288.13 - $388.67
Q2 2018	687,626	$199,574	$281.15	$249.17 - $310.91
Q1 2018	813,251	$222,683	$310.41	$259.76 - $370.57
Q4 2017	735,433	$234,286	$320.80	$301.81 - $348.84
Q3 2017	781,488	$244,698	$296.11	$269.50 - $330.00
Q2 2017	556,977	$151,141	$264.42	$244.28 - $291.90
Q1 2017	389,589	$106,520	$282.75	$260.50 - $301.42
Q4 2016	1,309	$371	$296.43	$268.00 - $329.83
Q3 2016	1,519	$475	$296.18	$240.07 - $333.65
Q2 2016	26,543	$6,418	$263.54	$223.02 - $292.69
Q1 2016	33,215	$8,646	$264.15	$242.07 - $301.02
Q4 2015	42,493	$13,017	$287.35	$254.00 - $311.65
Q3 2015	32,545	$9,496	$330.23	$265.00 - $412.24
Q2 2015	39,464	$15,940	$401.33	$368.88 - $432.88
Q1 2015	42,939	$18,130	$394.14	$334.40 - $480.18
Q4 2014	56,853	$19,298	$323.51	$290.85 - $361.93
Q3 2014	55,023	$18,201	$329.72	$298.31 - $349.00
Q2 2014	38,790	$12,230	$300.97	$272.02 - $322.25
Q1 2014	12,117	$3,706	$317.43	$270.62 - $358.89
Q4 2013	20,391	$5,704	$258.65	$221.07 - $298.82
Q3 2013	20,405	$4,912	$223.81	$203.55 - $248.95
Q2 2013	20,405	$4,391	$213.68	$191.80 - $242.64