BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q3 2016

Shares 3,000 Value ($000) $939 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 3,446 Value ($000) $833 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 3,777 Value ($000) $983 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 4,277 Value ($000) $1,310 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 7,003 Value ($000) $2,044 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 5,243 Value ($000) $2,118 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 3,344 Value ($000) $1,412 Avg Close $394.14 Range $334.40 - $480.18

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2016	3,000	$939	$296.18	$240.07 - $333.65
Q2 2016	3,446	$833	$263.54	$223.02 - $292.69
Q1 2016	3,777	$983	$264.15	$242.07 - $301.02
Q4 2015	4,277	$1,310	$287.35	$254.00 - $311.65
Q3 2015	7,003	$2,044	$330.23	$265.00 - $412.24
Q2 2015	5,243	$2,118	$401.33	$368.88 - $432.88
Q1 2015	3,344	$1,412	$394.14	$334.40 - $480.18