OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

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

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

Q2 2016

Shares 780,855 Value ($000) $25,675 Avg Close $32.41 Range $28.46 - $36.73

Q1 2016

Shares 764,275 Value ($000) $24,090 Avg Close $27.00 Range $21.44 - $33.05

Q4 2014

Shares 326,711 Value ($000) $15,976 Avg Close $54.06 Range $41.51 - $62.34

Q3 2014

Shares 558,996 Value ($000) $34,602 Avg Close $62.75 Range $59.66 - $65.05

Q2 2014

Shares 457,841 Value ($000) $29,343 Avg Close $58.83 Range $53.39 - $65.77

Q1 2014

Shares 236,591 Value ($000) $23,328 Avg Close $55.40 Range $51.78 - $59.95

Q4 2013

Shares 208,541 Value ($000) $21,213 Avg Close $59.96 Range $55.90 - $64.94

Q3 2013

Shares 226,550 Value ($000) $23,439 Avg Close $54.60 Range $50.41 - $61.05

Q2 2013

Shares 239,875 Value ($000) $22,222 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	780,855	$25,675	$32.41	$28.46 - $36.73
Q1 2016	764,275	$24,090	$27.00	$21.44 - $33.05
Q4 2014	326,711	$15,976	$54.06	$41.51 - $62.34
Q3 2014	558,996	$34,602	$62.75	$59.66 - $65.05
Q2 2014	457,841	$29,343	$58.83	$53.39 - $65.77
Q1 2014	236,591	$23,328	$55.40	$51.78 - $59.95
Q4 2013	208,541	$21,213	$59.96	$55.90 - $64.94
Q3 2013	226,550	$23,439	$54.60	$50.41 - $61.05
Q2 2013	239,875	$22,222	$51.03	$40.78 - $59.14