BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

TRUST CO OF VERMONT's Holding History (CIK: 0001134008)

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

Q4 2025

Shares 389 Value ($000) $68 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 1,049 Value ($000) $147 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 1,049 Value ($000) $132 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 1,049 Value ($000) $144 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 1,049 Value ($000) $160 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 1,069 Value ($000) $207 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 1,069 Value ($000) $248 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 2,185 Value ($000) $471 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 2,194 Value ($000) $568 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 2,268 Value ($000) $583 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 2,256 Value ($000) $643 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 2,258 Value ($000) $628 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 2,221 Value ($000) $615 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 2,205 Value ($000) $589 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 2,206 Value ($000) $450 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 2,217 Value ($000) $467 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 2,231 Value ($000) $535 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 2,352 Value ($000) $665 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 2,441 Value ($000) $845 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 1,679 Value ($000) $470 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 1,752 Value ($000) $429 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 2,522 Value ($000) $716 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 2,491 Value ($000) $666 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 2,741 Value ($000) $867 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 2,669 Value ($000) $792 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 2,632 Value ($000) $613 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 2,799 Value ($000) $654 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 3,014 Value ($000) $712 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 3,010 Value ($000) $906 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 3,042 Value ($000) $1,075 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 3,177 Value ($000) $922 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 3,132 Value ($000) $857 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 3,206 Value ($000) $1,021 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 3,181 Value ($000) $996 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 3,106 Value ($000) $843 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 2,412 Value ($000) $660 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 2,405 Value ($000) $682 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 2,043 Value ($000) $640 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 1,503 Value ($000) $364 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 1,199 Value ($000) $312 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 1,185 Value ($000) $363 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 907 Value ($000) $264 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 782 Value ($000) $316 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 625 Value ($000) $264 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 525 Value ($000) $178 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 525 Value ($000) $174 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 509 Value ($000) $161 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 509 Value ($000) $156 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 509 Value ($000) $142 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 164 Value ($000) $39 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 121 Value ($000) $26 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	389	$68	$163.37	$138.00 - $185.17
Q3 2025	1,049	$147	$135.17	$121.05 - $150.28
Q2 2025	1,049	$132	$124.60	$110.04 - $137.32
Q1 2025	1,049	$144	$142.96	$128.51 - $157.09
Q4 2024	1,049	$160	$168.67	$145.07 - $195.00
Q3 2024	1,069	$207	$209.21	$188.78 - $238.00
Q2 2024	1,069	$248	$217.32	$189.44 - $237.54
Q1 2024	2,185	$471	$234.20	$211.02 - $268.30
Q4 2023	2,194	$568	$245.62	$220.86 - $269.43
Q3 2023	2,268	$583	$267.47	$251.85 - $287.60
Q2 2023	2,256	$643	$297.86	$273.39 - $319.76
Q1 2023	2,258	$628	$276.70	$254.80 - $295.90
Q4 2022	2,221	$615	$282.44	$250.31 - $311.88
Q3 2022	2,205	$589	$212.38	$193.65 - $283.44
Q2 2022	2,206	$450	$204.43	$187.16 - $225.50
Q1 2022	2,217	$467	$217.46	$192.67 - $249.00
Q4 2021	2,231	$535	$257.12	$221.72 - $290.76
Q3 2021	2,352	$665	$327.75	$282.64 - $372.12
Q2 2021	2,441	$845	$302.94	$257.03 - $468.55
Q1 2021	1,679	$470	$269.69	$238.40 - $296.38
Q4 2020	1,752	$429	$259.08	$223.25 - $363.92
Q3 2020	2,522	$716	$278.91	$261.87 - $312.00
Q2 2020	2,491	$666	$300.59	$257.60 - $350.24
Q1 2020	2,741	$867	$303.47	$262.25 - $374.99
Q4 2019	2,669	$792	$277.46	$219.70 - $318.00
Q3 2019	2,632	$613	$232.85	$215.78 - $246.99
Q2 2019	2,799	$654	$230.90	$219.20 - $245.35
Q1 2019	3,014	$712	$314.89	$216.12 - $344.00
Q4 2018	3,010	$906	$319.14	$278.46 - $358.41
Q3 2018	3,042	$1,075	$344.30	$288.13 - $388.67
Q2 2018	3,177	$922	$281.15	$249.17 - $310.91
Q1 2018	3,132	$857	$310.41	$259.76 - $370.57
Q4 2017	3,206	$1,021	$320.80	$301.81 - $348.84
Q3 2017	3,181	$996	$296.11	$269.50 - $330.00
Q2 2017	3,106	$843	$264.42	$244.28 - $291.90
Q1 2017	2,412	$660	$282.75	$260.50 - $301.42
Q4 2016	2,405	$682	$296.43	$268.00 - $329.83
Q3 2016	2,043	$640	$296.18	$240.07 - $333.65
Q2 2016	1,503	$364	$263.54	$223.02 - $292.69
Q1 2016	1,199	$312	$264.15	$242.07 - $301.02
Q4 2015	1,185	$363	$287.35	$254.00 - $311.65
Q3 2015	907	$264	$330.23	$265.00 - $412.24
Q2 2015	782	$316	$401.33	$368.88 - $432.88
Q1 2015	625	$264	$394.14	$334.40 - $480.18
Q4 2014	525	$178	$323.51	$290.85 - $361.93
Q3 2014	525	$174	$329.72	$298.31 - $349.00
Q2 2014	509	$161	$300.97	$272.02 - $322.25
Q1 2014	509	$156	$317.43	$270.62 - $358.89
Q4 2013	509	$142	$258.65	$221.07 - $298.82
Q3 2013	164	$39	$223.81	$203.55 - $248.95
Q2 2013	121	$26	$213.68	$191.80 - $242.64