BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Arlington Partners LLC's Holding History (CIK: 0001389848)

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

Q2 2025

Shares 20,417 Value ($000) $2,564 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 27,725 Value ($000) $3,794 Avg Close $142.96 Range $128.51 - $157.09

Q3 2024

Shares 19,214 Value ($000) $3,724 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 14,312 Value ($000) $3,318 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 12,489 Value ($000) $2,693 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 11,656 Value ($000) $3,016 Avg Close $245.62 Range $220.86 - $269.43

Q2 2023

Shares 5,025 Value ($000) $1,431 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 5,075 Value ($000) $1,411 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 5,279 Value ($000) $1,462 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 6,635 Value ($000) $1,772 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 6,519 Value ($000) $1,329 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 7,504 Value ($000) $1,580 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 8,990 Value ($000) $2,157 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 8,758 Value ($000) $2,478 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 8,270 Value ($000) $2,864 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 8,313 Value ($000) $2,326 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 7,560 Value ($000) $1,851 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 7,547 Value ($000) $2,141 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 7,547 Value ($000) $2,019 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 6,917 Value ($000) $2,188 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 1,465 Value ($000) $435 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 1,135 Value ($000) $264 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 8,146 Value ($000) $1,905 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 515 Value ($000) $122 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 2,410 Value ($000) $725 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 2,290 Value ($000) $809 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 2,265 Value ($000) $657 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 2,265 Value ($000) $620 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 2,040 Value ($000) $650 Avg Close $320.80 Range $301.81 - $348.84

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	20,417	$2,564	$124.60	$110.04 - $137.32
Q1 2025	27,725	$3,794	$142.96	$128.51 - $157.09
Q3 2024	19,214	$3,724	$209.21	$188.78 - $238.00
Q2 2024	14,312	$3,318	$217.32	$189.44 - $237.54
Q1 2024	12,489	$2,693	$234.20	$211.02 - $268.30
Q4 2023	11,656	$3,016	$245.62	$220.86 - $269.43
Q2 2023	5,025	$1,431	$297.86	$273.39 - $319.76
Q1 2023	5,075	$1,411	$276.70	$254.80 - $295.90
Q4 2022	5,279	$1,462	$282.44	$250.31 - $311.88
Q3 2022	6,635	$1,772	$212.38	$193.65 - $283.44
Q2 2022	6,519	$1,329	$204.43	$187.16 - $225.50
Q1 2022	7,504	$1,580	$217.46	$192.67 - $249.00
Q4 2021	8,990	$2,157	$257.12	$221.72 - $290.76
Q3 2021	8,758	$2,478	$327.75	$282.64 - $372.12
Q2 2021	8,270	$2,864	$302.94	$257.03 - $468.55
Q1 2021	8,313	$2,326	$269.69	$238.40 - $296.38
Q4 2020	7,560	$1,851	$259.08	$223.25 - $363.92
Q3 2020	7,547	$2,141	$278.91	$261.87 - $312.00
Q2 2020	7,547	$2,019	$300.59	$257.60 - $350.24
Q1 2020	6,917	$2,188	$303.47	$262.25 - $374.99
Q4 2019	1,465	$435	$277.46	$219.70 - $318.00
Q3 2019	1,135	$264	$232.85	$215.78 - $246.99
Q2 2019	8,146	$1,905	$230.90	$219.20 - $245.35
Q1 2019	515	$122	$314.89	$216.12 - $344.00
Q4 2018	2,410	$725	$319.14	$278.46 - $358.41
Q3 2018	2,290	$809	$344.30	$288.13 - $388.67
Q2 2018	2,265	$657	$281.15	$249.17 - $310.91
Q1 2018	2,265	$620	$310.41	$259.76 - $370.57
Q4 2017	2,040	$650	$320.80	$301.81 - $348.84