BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Gilbert & Cook, Inc.'s Holding History (CIK: 0001675762)

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

Q4 2018

Shares 786 Value ($000) $237 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 887 Value ($000) $313 Avg Close $344.30 Range $288.13 - $388.67

Q3 2017

Shares 761 Value ($000) $238 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 1,245 Value ($000) $337 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 769 Value ($000) $210 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 734 Value ($000) $208 Avg Close $296.43 Range $268.00 - $329.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	786	$237	$319.14	$278.46 - $358.41
Q3 2018	887	$313	$344.30	$288.13 - $388.67
Q3 2017	761	$238	$296.11	$269.50 - $330.00
Q2 2017	1,245	$337	$264.42	$244.28 - $291.90
Q1 2017	769	$210	$282.75	$260.50 - $301.42
Q4 2016	734	$208	$296.43	$268.00 - $329.83