BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

NEXT CENTURY GROWTH INVESTORS LLC's Holding History (CIK: 0001134007)

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

Q2 2015

Shares 7,741 Value ($000) $3,126 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 7,806 Value ($000) $3,296 Avg Close $394.14 Range $334.40 - $480.18

Q1 2014

Shares 9,646 Value ($000) $2,950 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 9,139 Value ($000) $2,556 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 9,079 Value ($000) $2,185 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 9,205 Value ($000) $1,980 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	7,741	$3,126	$401.33	$368.88 - $432.88
Q1 2015	7,806	$3,296	$394.14	$334.40 - $480.18
Q1 2014	9,646	$2,950	$317.43	$270.62 - $358.89
Q4 2013	9,139	$2,556	$258.65	$221.07 - $298.82
Q3 2013	9,079	$2,185	$223.81	$203.55 - $248.95
Q2 2013	9,205	$1,980	$213.68	$191.80 - $242.64