BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

CHICAGO TRUST Co NA's Holding History (CIK: 0001601539)

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

Q2 2022

Shares 2,740 Value ($000) $559 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 3,548 Value ($000) $748 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 5,211 Value ($000) $1,250 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 7,524 Value ($000) $2,129 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 7,519 Value ($000) $2,603 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 5,674 Value ($000) $1,587 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 6,383 Value ($000) $1,563 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 5,601 Value ($000) $1,589 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 5,657 Value ($000) $1,513 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 5,799 Value ($000) $1,835 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 6,317 Value ($000) $1,875 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 7,462 Value ($000) $1,737 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 7,046 Value ($000) $1,648 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 5,989 Value ($000) $1,415 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 6,242 Value ($000) $1,879 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 6,147 Value ($000) $2,172 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 6,210 Value ($000) $1,802 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 6,111 Value ($000) $1,673 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 2,323 Value ($000) $740 Avg Close $320.80 Range $301.81 - $348.84

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2022	2,740	$559	$204.43	$187.16 - $225.50
Q1 2022	3,548	$748	$217.46	$192.67 - $249.00
Q4 2021	5,211	$1,250	$257.12	$221.72 - $290.76
Q3 2021	7,524	$2,129	$327.75	$282.64 - $372.12
Q2 2021	7,519	$2,603	$302.94	$257.03 - $468.55
Q1 2021	5,674	$1,587	$269.69	$238.40 - $296.38
Q4 2020	6,383	$1,563	$259.08	$223.25 - $363.92
Q3 2020	5,601	$1,589	$278.91	$261.87 - $312.00
Q2 2020	5,657	$1,513	$300.59	$257.60 - $350.24
Q1 2020	5,799	$1,835	$303.47	$262.25 - $374.99
Q4 2019	6,317	$1,875	$277.46	$219.70 - $318.00
Q3 2019	7,462	$1,737	$232.85	$215.78 - $246.99
Q2 2019	7,046	$1,648	$230.90	$219.20 - $245.35
Q1 2019	5,989	$1,415	$314.89	$216.12 - $344.00
Q4 2018	6,242	$1,879	$319.14	$278.46 - $358.41
Q3 2018	6,147	$2,172	$344.30	$288.13 - $388.67
Q2 2018	6,210	$1,802	$281.15	$249.17 - $310.91
Q1 2018	6,111	$1,673	$310.41	$259.76 - $370.57
Q4 2017	2,323	$740	$320.80	$301.81 - $348.84