OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

GREAT LAKES ADVISORS, LLC's Holding History (CIK: 0001078013)

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

Q1 2017

Shares 46,810 Value ($000) $1,552 Avg Close $36.69 Range $30.25 - $41.25

Q4 2016

Shares 40,035 Value ($000) $1,561 Avg Close $33.97 Range $28.00 - $41.75

Q3 2016

Shares 74,263 Value ($000) $2,344 Avg Close $30.74 Range $27.07 - $33.79

Q2 2016

Shares 64,421 Value ($000) $2,118 Avg Close $32.41 Range $28.46 - $36.73

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	46,810	$1,552	$36.69	$30.25 - $41.25
Q4 2016	40,035	$1,561	$33.97	$28.00 - $41.75
Q3 2016	74,263	$2,344	$30.74	$27.07 - $33.79
Q2 2016	64,421	$2,118	$32.41	$28.46 - $36.73