OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

ARDSLEY ADVISORY PARTNERS LP's Holding History (CIK: 0000900529)

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

Q2 2013

Shares 150,000 Value ($000) $13,896 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2013	150,000	$13,896	$51.03	$40.78 - $59.14