NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

Crestline Management, LP's Holding History (CIK: 0001536054)

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

Q3 2018

Shares 76,977 Value ($000) $1,624 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 63,672 Value ($000) $1,503 Avg Close $23.87 Range $21.47 - $26.42

Q4 2017

Shares 15,898 Value ($000) $417 Avg Close $26.38 Range $23.89 - $29.04

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	76,977	$1,624	$21.85	$20.28 - $24.24
Q2 2018	63,672	$1,503	$23.87	$21.47 - $26.42
Q4 2017	15,898	$417	$26.38	$23.89 - $29.04