PROPETRO HLDG CORP

Ticker: PUMP CUSIP: 74347M108 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2020

Shares 10,499 Value ($000) $78 Avg Close $5.56 Range $3.58 - $8.31

Q3 2020

Shares 123,273 Value ($000) $500 Avg Close $5.44 Range $3.73 - $6.90

Q2 2020

Shares 6,117 Value ($000) $31 Avg Close $4.61 Range $2.04 - $7.58

Q3 2019

Shares 12,211 Value ($000) $111 Avg Close $13.88 Range $8.68 - $21.83

Q4 2018

Shares 3,055 Value ($000) $38 Avg Close $16.47 Range $11.27 - $19.76

Q2 2018

Shares 3,390 Value ($000) $53 Avg Close $17.21 Range $14.00 - $20.91

Q4 2017

Shares 8,778 Value ($000) $177 Avg Close $16.95 Range $13.26 - $20.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	10,499	$78	$5.56	$3.58 - $8.31
Q3 2020	123,273	$500	$5.44	$3.73 - $6.90
Q2 2020	6,117	$31	$4.61	$2.04 - $7.58
Q3 2019	12,211	$111	$13.88	$8.68 - $21.83
Q4 2018	3,055	$38	$16.47	$11.27 - $19.76
Q2 2018	3,390	$53	$17.21	$14.00 - $20.91
Q4 2017	8,778	$177	$16.95	$13.26 - $20.60