BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ARK Investment Management LLC's Holding History (CIK: 0001697748)

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

Q3 2018

Shares 22,498 Value ($000) $7,949 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 14,050 Value ($000) $4,078 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 14,080 Value ($000) $3,855 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 6,579 Value ($000) $2,096 Avg Close $320.80 Range $301.81 - $348.84

Q2 2017

Shares 2,940 Value ($000) $798 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 3,308 Value ($000) $904 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 3,343 Value ($000) $948 Avg Close $296.43 Range $268.00 - $329.83

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	22,498	$7,949	$344.30	$288.13 - $388.67
Q2 2018	14,050	$4,078	$281.15	$249.17 - $310.91
Q1 2018	14,080	$3,855	$310.41	$259.76 - $370.57
Q4 2017	6,579	$2,096	$320.80	$301.81 - $348.84
Q2 2017	2,940	$798	$264.42	$244.28 - $291.90
Q1 2017	3,308	$904	$282.75	$260.50 - $301.42
Q4 2016	3,343	$948	$296.43	$268.00 - $329.83