OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

Westchester Capital Management, LLC's Holding History (CIK: 0001512805)

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

Q2 2014

Shares 55,800 Value ($000) $3,576 Avg Close $58.83 Range $53.39 - $65.77

Q1 2014

Shares 1,149,900 Value ($000) $113,380 Avg Close $55.40 Range $51.78 - $59.95

Q4 2013

Shares 919,900 Value ($000) $93,572 Avg Close $59.96 Range $55.90 - $64.94

Q2 2013

Shares 946,000 Value ($000) $87,638 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	55,800	$3,576	$58.83	$53.39 - $65.77
Q1 2014	1,149,900	$113,380	$55.40	$51.78 - $59.95
Q4 2013	919,900	$93,572	$59.96	$55.90 - $64.94
Q2 2013	946,000	$87,638	$51.03	$40.78 - $59.14