UNITED THERAPEUTICS CORP DEL

Ticker: UTHR CUSIP: 91307C102 Class: EQTY

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2015

Shares 541,235 Value ($000) $84,763 Avg Close $145.57 Range $117.88 - $164.04

Q3 2015

Shares 1,030,573 Value ($000) $135,252 Avg Close $160.39 Range $129.48 - $181.03

Q2 2015

Shares 1,018,653 Value ($000) $177,195 Avg Close $179.89 Range $157.20 - $190.29

Q1 2015

Shares 813,458 Value ($000) $140,269 Avg Close $152.45 Range $124.21 - $181.61

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	541,235	$84,763	$145.57	$117.88 - $164.04
Q3 2015	1,030,573	$135,252	$160.39	$129.48 - $181.03
Q2 2015	1,018,653	$177,195	$179.89	$157.20 - $190.29
Q1 2015	813,458	$140,269	$152.45	$124.21 - $181.61