PROPETRO HLDG CORP

Ticker: PUMP CUSIP: 74347M108 Class: Common Stock

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

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

Q1 2019

Shares 380,761 Value ($000) $8,583 Avg Close $17.90 Range $11.78 - $23.32

Q4 2018

Shares 712,514 Value ($000) $8,778 Avg Close $16.47 Range $11.27 - $19.76

Q3 2018

Shares 613,322 Value ($000) $10,114 Avg Close $16.12 Range $14.32 - $17.89

Q2 2018

Shares 681,911 Value ($000) $10,692 Avg Close $17.21 Range $14.00 - $20.91

Q1 2018

Shares 698,003 Value ($000) $11,091 Avg Close $18.08 Range $14.56 - $22.88

Q4 2017

Shares 508,549 Value ($000) $10,252 Avg Close $16.95 Range $13.26 - $20.60

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	380,761	$8,583	$17.90	$11.78 - $23.32
Q4 2018	712,514	$8,778	$16.47	$11.27 - $19.76
Q3 2018	613,322	$10,114	$16.12	$14.32 - $17.89
Q2 2018	681,911	$10,692	$17.21	$14.00 - $20.91
Q1 2018	698,003	$11,091	$18.08	$14.56 - $22.88
Q4 2017	508,549	$10,252	$16.95	$13.26 - $20.60