OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q2 2016

Shares 201,885 Value ($000) $6,636 Avg Close $32.41 Range $28.46 - $36.73

Q1 2016

Shares 201,885 Value ($000) $6,363 Avg Close $27.00 Range $21.44 - $33.05

Q4 2015

Shares 158,117 Value ($000) $4,310 Avg Close $29.75 Range $24.24 - $33.14

Q3 2015

Shares 91,578 Value ($000) $2,392 Avg Close $29.60 Range $23.35 - $37.27

Q2 2015

Shares 77,230 Value ($000) $2,876 Avg Close $42.08 Range $36.30 - $48.16

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	201,885	$6,636	$32.41	$28.46 - $36.73
Q1 2016	201,885	$6,363	$27.00	$21.44 - $33.05
Q4 2015	158,117	$4,310	$29.75	$24.24 - $33.14
Q3 2015	91,578	$2,392	$29.60	$23.35 - $37.27
Q2 2015	77,230	$2,876	$42.08	$36.30 - $48.16