OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

TORTOISE CAPITAL ADVISORS, L.L.C.'s Holding History (CIK: 0001280965)

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

Q1 2014

Shares 694 Value ($000) $68 Avg Close $55.40 Range $51.78 - $59.95

Q4 2013

Shares 1,213 Value ($000) $123 Avg Close $59.96 Range $55.90 - $64.94

Q3 2013

Shares 35 Value ($000) $4 Avg Close $54.60 Range $50.41 - $61.05

Q2 2013

Shares 25 Value ($000) $2 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	694	$68	$55.40	$51.78 - $59.95
Q4 2013	1,213	$123	$59.96	$55.90 - $64.94
Q3 2013	35	$4	$54.60	$50.41 - $61.05
Q2 2013	25	$2	$51.03	$40.78 - $59.14