PROPETRO HLDG CORP

Ticker: PUMP CUSIP: 74347M108 Class: Common Stock

Municipal Employees' Retirement System of Michigan's Holding History (CIK: 0001588873)

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

Q1 2020

Shares 25,200 Value ($000) $63 Avg Close $8.03 Range $1.36 - $12.12

Q4 2019

Shares 25,200 Value ($000) $284 Avg Close $8.94 Range $7.07 - $11.46

Q3 2019

Shares 24,710 Value ($000) $225 Avg Close $13.88 Range $8.68 - $21.83

Q2 2019

Shares 32,120 Value ($000) $664 Avg Close $21.24 Range $17.63 - $25.38

Q1 2019

Shares 21,730 Value ($000) $490 Avg Close $17.90 Range $11.78 - $23.32

Q4 2018

Shares 21,260 Value ($000) $262 Avg Close $16.47 Range $11.27 - $19.76

Q2 2018

Shares 20,220 Value ($000) $317 Avg Close $17.21 Range $14.00 - $20.91

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2020	25,200	$63	$8.03	$1.36 - $12.12
Q4 2019	25,200	$284	$8.94	$7.07 - $11.46
Q3 2019	24,710	$225	$13.88	$8.68 - $21.83
Q2 2019	32,120	$664	$21.24	$17.63 - $25.38
Q1 2019	21,730	$490	$17.90	$11.78 - $23.32
Q4 2018	21,260	$262	$16.47	$11.27 - $19.76
Q2 2018	20,220	$317	$17.21	$14.00 - $20.91