BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ROBERTS GLORE & CO INC /IL/'s Holding History (CIK: 0001017115)

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

Q4 2025

Shares 3,081 Value ($000) $542 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 3,929 Value ($000) $550 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 4,344 Value ($000) $546 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 4,163 Value ($000) $570 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 3,536 Value ($000) $541 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 3,684 Value ($000) $714 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 3,444 Value ($000) $798 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 3,355 Value ($000) $723 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 3,346 Value ($000) $866 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 3,342 Value ($000) $859 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 3,617 Value ($000) $1,030 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 3,834 Value ($000) $1,066 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 3,923 Value ($000) $1,086 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 5,626 Value ($000) $1,502 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 6,161 Value ($000) $1,256 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 5,348 Value ($000) $1,126 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 5,129 Value ($000) $1,231 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 6,019 Value ($000) $1,703 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 6,039 Value ($000) $2,091 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 5,931 Value ($000) $1,659 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 5,789 Value ($000) $1,417 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 5,541 Value ($000) $1,571 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 5,437 Value ($000) $1,454 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 5,461 Value ($000) $1,727 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 5,415 Value ($000) $1,606 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 2,951 Value ($000) $687 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 2,679 Value ($000) $627 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 2,499 Value ($000) $591 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 2,589 Value ($000) $779 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 2,582 Value ($000) $912 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 2,582 Value ($000) $749 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 2,477 Value ($000) $678 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 2,388 Value ($000) $761 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 2,498 Value ($000) $782 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 2,438 Value ($000) $662 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 2,368 Value ($000) $647 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 1,858 Value ($000) $527 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 1,858 Value ($000) $582 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 1,858 Value ($000) $449 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 1,348 Value ($000) $351 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 1,218 Value ($000) $373 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 1,120 Value ($000) $327 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 1,425 Value ($000) $576 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 1,575 Value ($000) $665 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 1,651 Value ($000) $560 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 1,705 Value ($000) $564 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 1,845 Value ($000) $582 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 1,920 Value ($000) $587 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 2,180 Value ($000) $609 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 2,180 Value ($000) $525 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 2,745 Value ($000) $591 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,081	$542	$163.37	$138.00 - $185.17
Q3 2025	3,929	$550	$135.17	$121.05 - $150.28
Q2 2025	4,344	$546	$124.60	$110.04 - $137.32
Q1 2025	4,163	$570	$142.96	$128.51 - $157.09
Q4 2024	3,536	$541	$168.67	$145.07 - $195.00
Q3 2024	3,684	$714	$209.21	$188.78 - $238.00
Q2 2024	3,444	$798	$217.32	$189.44 - $237.54
Q1 2024	3,355	$723	$234.20	$211.02 - $268.30
Q4 2023	3,346	$866	$245.62	$220.86 - $269.43
Q3 2023	3,342	$859	$267.47	$251.85 - $287.60
Q2 2023	3,617	$1,030	$297.86	$273.39 - $319.76
Q1 2023	3,834	$1,066	$276.70	$254.80 - $295.90
Q4 2022	3,923	$1,086	$282.44	$250.31 - $311.88
Q3 2022	5,626	$1,502	$212.38	$193.65 - $283.44
Q2 2022	6,161	$1,256	$204.43	$187.16 - $225.50
Q1 2022	5,348	$1,126	$217.46	$192.67 - $249.00
Q4 2021	5,129	$1,231	$257.12	$221.72 - $290.76
Q3 2021	6,019	$1,703	$327.75	$282.64 - $372.12
Q2 2021	6,039	$2,091	$302.94	$257.03 - $468.55
Q1 2021	5,931	$1,659	$269.69	$238.40 - $296.38
Q4 2020	5,789	$1,417	$259.08	$223.25 - $363.92
Q3 2020	5,541	$1,571	$278.91	$261.87 - $312.00
Q2 2020	5,437	$1,454	$300.59	$257.60 - $350.24
Q1 2020	5,461	$1,727	$303.47	$262.25 - $374.99
Q4 2019	5,415	$1,606	$277.46	$219.70 - $318.00
Q3 2019	2,951	$687	$232.85	$215.78 - $246.99
Q2 2019	2,679	$627	$230.90	$219.20 - $245.35
Q1 2019	2,499	$591	$314.89	$216.12 - $344.00
Q4 2018	2,589	$779	$319.14	$278.46 - $358.41
Q3 2018	2,582	$912	$344.30	$288.13 - $388.67
Q2 2018	2,582	$749	$281.15	$249.17 - $310.91
Q1 2018	2,477	$678	$310.41	$259.76 - $370.57
Q4 2017	2,388	$761	$320.80	$301.81 - $348.84
Q3 2017	2,498	$782	$296.11	$269.50 - $330.00
Q2 2017	2,438	$662	$264.42	$244.28 - $291.90
Q1 2017	2,368	$647	$282.75	$260.50 - $301.42
Q4 2016	1,858	$527	$296.43	$268.00 - $329.83
Q3 2016	1,858	$582	$296.18	$240.07 - $333.65
Q2 2016	1,858	$449	$263.54	$223.02 - $292.69
Q1 2016	1,348	$351	$264.15	$242.07 - $301.02
Q4 2015	1,218	$373	$287.35	$254.00 - $311.65
Q3 2015	1,120	$327	$330.23	$265.00 - $412.24
Q2 2015	1,425	$576	$401.33	$368.88 - $432.88
Q1 2015	1,575	$665	$394.14	$334.40 - $480.18
Q4 2014	1,651	$560	$323.51	$290.85 - $361.93
Q3 2014	1,705	$564	$329.72	$298.31 - $349.00
Q2 2014	1,845	$582	$300.97	$272.02 - $322.25
Q1 2014	1,920	$587	$317.43	$270.62 - $358.89
Q4 2013	2,180	$609	$258.65	$221.07 - $298.82
Q3 2013	2,180	$525	$223.81	$203.55 - $248.95
Q2 2013	2,745	$591	$213.68	$191.80 - $242.64