BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ArrowMark Colorado Holdings LLC's Holding History (CIK: 0001483859)

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

Q2 2015

Shares 1,475 Value ($000) $596 Avg Close $401.33 Range $368.88 - $432.88

Q2 2014

Shares 7,058 Value ($000) $2,225 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 7,058 Value ($000) $2,159 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 7,000 Value ($000) $1,957 Avg Close $258.65 Range $221.07 - $298.82

Q2 2013

Shares 1,450 Value ($000) $312 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	1,475	$596	$401.33	$368.88 - $432.88
Q2 2014	7,058	$2,225	$300.97	$272.02 - $322.25
Q1 2014	7,058	$2,159	$317.43	$270.62 - $358.89
Q4 2013	7,000	$1,957	$258.65	$221.07 - $298.82
Q2 2013	1,450	$312	$213.68	$191.80 - $242.64