BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

CHILTON INVESTMENT CO INC.'s Holding History (CIK: 0001332632)

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

Q1 2019

Shares 1,872 Value ($000) $443 Avg Close $314.89 Range $216.12 - $344.00

Q2 2016

Shares 123,200 Value ($000) $29,792 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 72,835 Value ($000) $18,960 Avg Close $264.15 Range $242.07 - $301.02

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	1,872	$443	$314.89	$216.12 - $344.00
Q2 2016	123,200	$29,792	$263.54	$223.02 - $292.69
Q1 2016	72,835	$18,960	$264.15	$242.07 - $301.02