OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

BOKF, NA's Holding History (CIK: 0000009634)

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

Q3 2014

Shares 4,906 Value ($000) $304 Avg Close $62.75 Range $59.66 - $65.05

Q2 2014

Shares 5,651 Value ($000) $362 Avg Close $58.83 Range $53.39 - $65.77

Q1 2014

Shares 6,516 Value ($000) $642 Avg Close $55.40 Range $51.78 - $59.95

Q4 2013

Shares 6,184 Value ($000) $629 Avg Close $59.96 Range $55.90 - $64.94

Q3 2013

Shares 6,247 Value ($000) $647 Avg Close $54.60 Range $50.41 - $61.05

Q2 2013

Shares 9,104 Value ($000) $844 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	4,906	$304	$62.75	$59.66 - $65.05
Q2 2014	5,651	$362	$58.83	$53.39 - $65.77
Q1 2014	6,516	$642	$55.40	$51.78 - $59.95
Q4 2013	6,184	$629	$59.96	$55.90 - $64.94
Q3 2013	6,247	$647	$54.60	$50.41 - $61.05
Q2 2013	9,104	$844	$51.03	$40.78 - $59.14