BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

LORING WOLCOTT & COOLIDGE FIDUCIARY ADVISORS LLP/MA's Holding History (CIK: 0000932974)

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

Q4 2025

Shares 6,193 Value ($000) $1,078 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 6,193 Value ($000) $929 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 6,193 Value ($000) $778 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 6,193 Value ($000) $732 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 6,479 Value ($000) $964 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 6,479 Value ($000) $1,191 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 6,505 Value ($000) $1,464 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 6,479 Value ($000) $1,258 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 6,479 Value ($000) $1,598 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 6,709 Value ($000) $1,623 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 6,709 Value ($000) $1,911 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 6,884 Value ($000) $1,914 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 7,084 Value ($000) $1,962 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 7,259 Value ($000) $1,938 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 7,285 Value ($000) $1,486 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 7,259 Value ($000) $1,529 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 7,259 Value ($000) $1,742 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 7,659 Value ($000) $2,167 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 7,734 Value ($000) $2,678 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 8,202 Value ($000) $2,295 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 8,288 Value ($000) $2,029 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 8,284 Value ($000) $2,350 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 8,284 Value ($000) $2,216 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 8,284 Value ($000) $2,621 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 8,284 Value ($000) $2,458 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 8,295 Value ($000) $1,931 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 8,345 Value ($000) $1,952 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 8,373 Value ($000) $1,979 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 8,427 Value ($000) $2,536 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 8,373 Value ($000) $2,958 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 8,473 Value ($000) $2,459 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 8,473 Value ($000) $2,320 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 8,523 Value ($000) $2,715 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 8,523 Value ($000) $2,669 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 8,512 Value ($000) $2,465 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 8,484 Value ($000) $2,320 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 7,784 Value ($000) $2,207 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 7,784 Value ($000) $2,437 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 7,734 Value ($000) $1,870 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 7,734 Value ($000) $2,013 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 7,754 Value ($000) $2,375 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 8,254 Value ($000) $3,334 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 8,254 Value ($000) $3,334 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 8,254 Value ($000) $3,485 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 8,379 Value ($000) $2,844 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 8,129 Value ($000) $2,689 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 8,129 Value ($000) $2,563 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 8,214 Value ($000) $2,512 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 8,466 Value ($000) $2,367 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 8,299 Value ($000) $1,998 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 8,299 Value ($000) $1,786 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,193	$1,078	$163.37	$138.00 - $185.17
Q3 2025	6,193	$929	$135.17	$121.05 - $150.28
Q2 2025	6,193	$778	$124.60	$110.04 - $137.32
Q1 2025	6,193	$732	$142.96	$128.51 - $157.09
Q4 2024	6,479	$964	$168.67	$145.07 - $195.00
Q3 2024	6,479	$1,191	$209.21	$188.78 - $238.00
Q2 2024	6,505	$1,464	$217.32	$189.44 - $237.54
Q1 2024	6,479	$1,258	$234.20	$211.02 - $268.30
Q4 2023	6,479	$1,598	$245.62	$220.86 - $269.43
Q3 2023	6,709	$1,623	$267.47	$251.85 - $287.60
Q2 2023	6,709	$1,911	$297.86	$273.39 - $319.76
Q1 2023	6,884	$1,914	$276.70	$254.80 - $295.90
Q4 2022	7,084	$1,962	$282.44	$250.31 - $311.88
Q3 2022	7,259	$1,938	$212.38	$193.65 - $283.44
Q2 2022	7,285	$1,486	$204.43	$187.16 - $225.50
Q1 2022	7,259	$1,529	$217.46	$192.67 - $249.00
Q4 2021	7,259	$1,742	$257.12	$221.72 - $290.76
Q3 2021	7,659	$2,167	$327.75	$282.64 - $372.12
Q2 2021	7,734	$2,678	$302.94	$257.03 - $468.55
Q1 2021	8,202	$2,295	$269.69	$238.40 - $296.38
Q4 2020	8,288	$2,029	$259.08	$223.25 - $363.92
Q3 2020	8,284	$2,350	$278.91	$261.87 - $312.00
Q2 2020	8,284	$2,216	$300.59	$257.60 - $350.24
Q1 2020	8,284	$2,621	$303.47	$262.25 - $374.99
Q4 2019	8,284	$2,458	$277.46	$219.70 - $318.00
Q3 2019	8,295	$1,931	$232.85	$215.78 - $246.99
Q2 2019	8,345	$1,952	$230.90	$219.20 - $245.35
Q1 2019	8,373	$1,979	$314.89	$216.12 - $344.00
Q4 2018	8,427	$2,536	$319.14	$278.46 - $358.41
Q3 2018	8,373	$2,958	$344.30	$288.13 - $388.67
Q2 2018	8,473	$2,459	$281.15	$249.17 - $310.91
Q1 2018	8,473	$2,320	$310.41	$259.76 - $370.57
Q4 2017	8,523	$2,715	$320.80	$301.81 - $348.84
Q3 2017	8,523	$2,669	$296.11	$269.50 - $330.00
Q2 2017	8,512	$2,465	$264.42	$244.28 - $291.90
Q1 2017	8,484	$2,320	$282.75	$260.50 - $301.42
Q4 2016	7,784	$2,207	$296.43	$268.00 - $329.83
Q3 2016	7,784	$2,437	$296.18	$240.07 - $333.65
Q2 2016	7,734	$1,870	$263.54	$223.02 - $292.69
Q1 2016	7,734	$2,013	$264.15	$242.07 - $301.02
Q4 2015	7,754	$2,375	$287.35	$254.00 - $311.65
Q3 2015	8,254	$3,334	$330.23	$265.00 - $412.24
Q2 2015	8,254	$3,334	$401.33	$368.88 - $432.88
Q1 2015	8,254	$3,485	$394.14	$334.40 - $480.18
Q4 2014	8,379	$2,844	$323.51	$290.85 - $361.93
Q3 2014	8,129	$2,689	$329.72	$298.31 - $349.00
Q2 2014	8,129	$2,563	$300.97	$272.02 - $322.25
Q1 2014	8,214	$2,512	$317.43	$270.62 - $358.89
Q4 2013	8,466	$2,367	$258.65	$221.07 - $298.82
Q3 2013	8,299	$1,998	$223.81	$203.55 - $248.95
Q2 2013	8,299	$1,786	$213.68	$191.80 - $242.64