VERTEX PHARMACEUTICALS INC

Ticker: VRTX CUSIP: 92532F100 Class: EQTY

VIKING GLOBAL INVESTORS LP's Holding History (CIK: 0001103804)

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

Q4 2015

Shares 1,421,673 Value ($000) $178,889 Avg Close $120.72 Range $101.49 - $134.71

Q3 2015

Shares 1,344,464 Value ($000) $140,012 Avg Close $128.47 Range $97.45 - $143.45

Q2 2015

Shares 1,805,186 Value ($000) $222,904 Avg Close $125.98 Range $113.68 - $137.50

Q1 2015

Shares 1,770,150 Value ($000) $208,825 Avg Close $119.81 Range $103.75 - $136.33

Q4 2014

Shares 764,200 Value ($000) $90,787 Avg Close $112.63 Range $96.43 - $124.35

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	1,421,673	$178,889	$120.72	$101.49 - $134.71
Q3 2015	1,344,464	$140,012	$128.47	$97.45 - $143.45
Q2 2015	1,805,186	$222,904	$125.98	$113.68 - $137.50
Q1 2015	1,770,150	$208,825	$119.81	$103.75 - $136.33
Q4 2014	764,200	$90,787	$112.63	$96.43 - $124.35