BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ZEVENBERGEN CAPITAL INVESTMENTS LLC's Holding History (CIK: 0001276918)

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

Q3 2015

Shares 7,904 Value ($000) $2,306 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 8,059 Value ($000) $3,255 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 7,884 Value ($000) $3,329 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 7,026 Value ($000) $2,385 Avg Close $323.51 Range $290.85 - $361.93

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	7,904	$2,306	$330.23	$265.00 - $412.24
Q2 2015	8,059	$3,255	$401.33	$368.88 - $432.88
Q1 2015	7,884	$3,329	$394.14	$334.40 - $480.18
Q4 2014	7,026	$2,385	$323.51	$290.85 - $361.93