BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

BOKF, NA's Holding History (CIK: 0000009634)

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

Q4 2025

Shares 14,868 Value ($000) $2,617 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 20,280 Value ($000) $2,841 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 21,411 Value ($000) $2,689 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 22,662 Value ($000) $3,101 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 20,852 Value ($000) $3,103 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 24,209 Value ($000) $4,473 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 24,828 Value ($000) $5,756 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 25,798 Value ($000) $5,542 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 34,354 Value ($000) $8,890 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 42,961 Value ($000) $10,205 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 27,378 Value ($000) $7,799 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 21,954 Value ($000) $6,104 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 28,848 Value ($000) $7,989 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 28,701 Value ($000) $7,663 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 19,280 Value ($000) $3,932 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 19,352 Value ($000) $4,075 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 19,372 Value ($000) $4,648 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 26,507 Value ($000) $7,502 Avg Close $327.75 Range $282.64 - $372.12

Q1 2021

Shares 19,088 Value ($000) $5,340 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 20,597 Value ($000) $5,043 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 16,051 Value ($000) $4,554 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 11,245 Value ($000) $3,009 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 3,616 Value ($000) $1,144 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 2,972 Value ($000) $882 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 3,350 Value ($000) $780 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 5,659 Value ($000) $1,323 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 6,163 Value ($000) $1,457 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 14,445 Value ($000) $4,347 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 15,942 Value ($000) $5,632 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 19,650 Value ($000) $5,703 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 16,654 Value ($000) $4,560 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 15,513 Value ($000) $4,942 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 15,523 Value ($000) $4,860 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 15,306 Value ($000) $4,153 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 16,090 Value ($000) $4,400 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 16,477 Value ($000) $4,672 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 13,972 Value ($000) $4,374 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 8,049 Value ($000) $1,946 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 9,566 Value ($000) $2,490 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 17,983 Value ($000) $5,509 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 22,841 Value ($000) $6,665 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 35,230 Value ($000) $14,231 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 21,263 Value ($000) $8,978 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 20,146 Value ($000) $6,839 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 18,389 Value ($000) $6,083 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 13,249 Value ($000) $4,177 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 12,724 Value ($000) $3,892 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 13,435 Value ($000) $3,756 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 12,535 Value ($000) $3,018 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 16,297 Value ($000) $3,507 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	14,868	$2,617	$163.37	$138.00 - $185.17
Q3 2025	20,280	$2,841	$135.17	$121.05 - $150.28
Q2 2025	21,411	$2,689	$124.60	$110.04 - $137.32
Q1 2025	22,662	$3,101	$142.96	$128.51 - $157.09
Q4 2024	20,852	$3,103	$168.67	$145.07 - $195.00
Q3 2024	24,209	$4,473	$209.21	$188.78 - $238.00
Q2 2024	24,828	$5,756	$217.32	$189.44 - $237.54
Q1 2024	25,798	$5,542	$234.20	$211.02 - $268.30
Q4 2023	34,354	$8,890	$245.62	$220.86 - $269.43
Q3 2023	42,961	$10,205	$267.47	$251.85 - $287.60
Q2 2023	27,378	$7,799	$297.86	$273.39 - $319.76
Q1 2023	21,954	$6,104	$276.70	$254.80 - $295.90
Q4 2022	28,848	$7,989	$282.44	$250.31 - $311.88
Q3 2022	28,701	$7,663	$212.38	$193.65 - $283.44
Q2 2022	19,280	$3,932	$204.43	$187.16 - $225.50
Q1 2022	19,352	$4,075	$217.46	$192.67 - $249.00
Q4 2021	19,372	$4,648	$257.12	$221.72 - $290.76
Q3 2021	26,507	$7,502	$327.75	$282.64 - $372.12
Q1 2021	19,088	$5,340	$269.69	$238.40 - $296.38
Q4 2020	20,597	$5,043	$259.08	$223.25 - $363.92
Q3 2020	16,051	$4,554	$278.91	$261.87 - $312.00
Q2 2020	11,245	$3,009	$300.59	$257.60 - $350.24
Q1 2020	3,616	$1,144	$303.47	$262.25 - $374.99
Q4 2019	2,972	$882	$277.46	$219.70 - $318.00
Q3 2019	3,350	$780	$232.85	$215.78 - $246.99
Q2 2019	5,659	$1,323	$230.90	$219.20 - $245.35
Q1 2019	6,163	$1,457	$314.89	$216.12 - $344.00
Q4 2018	14,445	$4,347	$319.14	$278.46 - $358.41
Q3 2018	15,942	$5,632	$344.30	$288.13 - $388.67
Q2 2018	19,650	$5,703	$281.15	$249.17 - $310.91
Q1 2018	16,654	$4,560	$310.41	$259.76 - $370.57
Q4 2017	15,513	$4,942	$320.80	$301.81 - $348.84
Q3 2017	15,523	$4,860	$296.11	$269.50 - $330.00
Q2 2017	15,306	$4,153	$264.42	$244.28 - $291.90
Q1 2017	16,090	$4,400	$282.75	$260.50 - $301.42
Q4 2016	16,477	$4,672	$296.43	$268.00 - $329.83
Q3 2016	13,972	$4,374	$296.18	$240.07 - $333.65
Q2 2016	8,049	$1,946	$263.54	$223.02 - $292.69
Q1 2016	9,566	$2,490	$264.15	$242.07 - $301.02
Q4 2015	17,983	$5,509	$287.35	$254.00 - $311.65
Q3 2015	22,841	$6,665	$330.23	$265.00 - $412.24
Q2 2015	35,230	$14,231	$401.33	$368.88 - $432.88
Q1 2015	21,263	$8,978	$394.14	$334.40 - $480.18
Q4 2014	20,146	$6,839	$323.51	$290.85 - $361.93
Q3 2014	18,389	$6,083	$329.72	$298.31 - $349.00
Q2 2014	13,249	$4,177	$300.97	$272.02 - $322.25
Q1 2014	12,724	$3,892	$317.43	$270.62 - $358.89
Q4 2013	13,435	$3,756	$258.65	$221.07 - $298.82
Q3 2013	12,535	$3,018	$223.81	$203.55 - $248.95
Q2 2013	16,297	$3,507	$213.68	$191.80 - $242.64