BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ITHAKA GROUP LLC's Holding History (CIK: 0001484043)

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

Q4 2016

Shares 18,091 Value ($000) $5,130 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 21,426 Value ($000) $6,707 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 25,046 Value ($000) $6,057 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 25,016 Value ($000) $6,512 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 46,341 Value ($000) $14,197 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 44,040 Value ($000) $12,851 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 38,528 Value ($000) $15,563 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 41,616 Value ($000) $17,572 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 29,927 Value ($000) $10,159 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 31,936 Value ($000) $10,565 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 32,853 Value ($000) $10,359 Avg Close $300.97 Range $272.02 - $322.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	18,091	$5,130	$296.43	$268.00 - $329.83
Q3 2016	21,426	$6,707	$296.18	$240.07 - $333.65
Q2 2016	25,046	$6,057	$263.54	$223.02 - $292.69
Q1 2016	25,016	$6,512	$264.15	$242.07 - $301.02
Q4 2015	46,341	$14,197	$287.35	$254.00 - $311.65
Q3 2015	44,040	$12,851	$330.23	$265.00 - $412.24
Q2 2015	38,528	$15,563	$401.33	$368.88 - $432.88
Q1 2015	41,616	$17,572	$394.14	$334.40 - $480.18
Q4 2014	29,927	$10,159	$323.51	$290.85 - $361.93
Q3 2014	31,936	$10,565	$329.72	$298.31 - $349.00
Q2 2014	32,853	$10,359	$300.97	$272.02 - $322.25