BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Field & Main Bank's Holding History (CIK: 0001594492)

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

Q2 2019

Shares 75 Value ($000) $18 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 75 Value ($000) $18 Avg Close $314.89 Range $216.12 - $344.00

Q3 2018

Shares 100 Value ($000) $35 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 100 Value ($000) $33 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 300 Value ($000) $82 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 300 Value ($000) $96 Avg Close $320.80 Range $301.81 - $348.84

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	75	$18	$230.90	$219.20 - $245.35
Q1 2019	75	$18	$314.89	$216.12 - $344.00
Q3 2018	100	$35	$344.30	$288.13 - $388.67
Q2 2018	100	$33	$281.15	$249.17 - $310.91
Q1 2018	300	$82	$310.41	$259.76 - $370.57
Q4 2017	300	$96	$320.80	$301.81 - $348.84