OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q2 2017

Shares 21,300 Value ($000) $578 Avg Close $29.62 Range $25.25 - $33.75

Q1 2017

Shares 20,900 Value ($000) $693 Avg Close $36.69 Range $30.25 - $41.25

Q4 2016

Shares 20,700 Value ($000) $807 Avg Close $33.97 Range $28.00 - $41.75

Q3 2016

Shares 20,700 Value ($000) $653 Avg Close $30.74 Range $27.07 - $33.79

Q2 2016

Shares 20,600 Value ($000) $677 Avg Close $32.41 Range $28.46 - $36.73

Q1 2016

Shares 20,500 Value ($000) $646 Avg Close $27.00 Range $21.44 - $33.05

Q4 2015

Shares 20,100 Value ($000) $548 Avg Close $29.75 Range $24.24 - $33.14

Q3 2015

Shares 23,300 Value ($000) $609 Avg Close $29.60 Range $23.35 - $37.27

Q2 2015

Shares 23,500 Value ($000) $875 Avg Close $42.08 Range $36.30 - $48.16

Q1 2015

Shares 23,300 Value ($000) $927 Avg Close $42.31 Range $38.41 - $49.31

Q4 2014

Shares 25,300 Value ($000) $1,237 Avg Close $54.06 Range $41.51 - $62.34

Q3 2014

Shares 25,700 Value ($000) $1,591 Avg Close $62.75 Range $59.66 - $65.05

Q2 2014

Shares 25,000 Value ($000) $1,602 Avg Close $58.83 Range $53.39 - $65.77

Q1 2014

Shares 25,100 Value ($000) $2,475 Avg Close $55.40 Range $51.78 - $59.95

Q4 2013

Shares 25,800 Value ($000) $2,624 Avg Close $59.96 Range $55.90 - $64.94

Q3 2013

Shares 25,700 Value ($000) $2,659 Avg Close $54.60 Range $50.41 - $61.05

Q2 2013

Shares 25,300 Value ($000) $2,344 Avg Close $51.03 Range $40.78 - $59.14

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	21,300	$578	$29.62	$25.25 - $33.75
Q1 2017	20,900	$693	$36.69	$30.25 - $41.25
Q4 2016	20,700	$807	$33.97	$28.00 - $41.75
Q3 2016	20,700	$653	$30.74	$27.07 - $33.79
Q2 2016	20,600	$677	$32.41	$28.46 - $36.73
Q1 2016	20,500	$646	$27.00	$21.44 - $33.05
Q4 2015	20,100	$548	$29.75	$24.24 - $33.14
Q3 2015	23,300	$609	$29.60	$23.35 - $37.27
Q2 2015	23,500	$875	$42.08	$36.30 - $48.16
Q1 2015	23,300	$927	$42.31	$38.41 - $49.31
Q4 2014	25,300	$1,237	$54.06	$41.51 - $62.34
Q3 2014	25,700	$1,591	$62.75	$59.66 - $65.05
Q2 2014	25,000	$1,602	$58.83	$53.39 - $65.77
Q1 2014	25,100	$2,475	$55.40	$51.78 - $59.95
Q4 2013	25,800	$2,624	$59.96	$55.90 - $64.94
Q3 2013	25,700	$2,659	$54.60	$50.41 - $61.05
Q2 2013	25,300	$2,344	$51.03	$40.78 - $59.14