BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

CONGRESS ASSET MANAGEMENT CO /MA's Holding History (CIK: 0000897378)

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

Q3 2015

Shares 138,295 Value ($000) $40,356 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 110,760 Value ($000) $44,740 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 136,041 Value ($000) $57,442 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 144,852 Value ($000) $49,170 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 149,946 Value ($000) $49,604 Avg Close $329.72 Range $298.31 - $349.00

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	138,295	$40,356	$330.23	$265.00 - $412.24
Q2 2015	110,760	$44,740	$401.33	$368.88 - $432.88
Q1 2015	136,041	$57,442	$394.14	$334.40 - $480.18
Q4 2014	144,852	$49,170	$323.51	$290.85 - $361.93
Q3 2014	149,946	$49,604	$329.72	$298.31 - $349.00