PROPETRO HLDG CORP

Ticker: PUMP CUSIP: 74347M108 Class: Common Stock

CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT's Holding History (CIK: 0001329375)

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

Q2 2018

Shares 271,836 Value ($000) $4,262 Avg Close $17.21 Range $14.00 - $20.91

Q1 2018

Shares 183,287 Value ($000) $2,912 Avg Close $18.08 Range $14.56 - $22.88

Q3 2017

Shares 390,073 Value ($000) $5,598 Avg Close $12.55 Range $10.84 - $14.63

Q2 2017

Shares 313,401 Value ($000) $4,375 Avg Close $13.44 Range $11.68 - $15.30

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	271,836	$4,262	$17.21	$14.00 - $20.91
Q1 2018	183,287	$2,912	$18.08	$14.56 - $22.88
Q3 2017	390,073	$5,598	$12.55	$10.84 - $14.63
Q2 2017	313,401	$4,375	$13.44	$11.68 - $15.30