NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

WCM INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001061186)

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

Q1 2018

Shares 160,941 Value ($000) $3,838 Avg Close $26.44 Range $22.81 - $29.04

Q4 2017

Shares 162,173 Value ($000) $4,249 Avg Close $26.38 Range $23.89 - $29.04

Q3 2017

Shares 161,617 Value ($000) $4,590 Avg Close $24.49 Range $22.26 - $29.24

Q2 2017

Shares 160,942 Value ($000) $3,999 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 159,757 Value ($000) $4,162 Avg Close $27.74 Range $23.30 - $33.05

Q4 2016

Shares 114,282 Value ($000) $3,674 Avg Close $27.19 Range $20.43 - $34.13

Q3 2016

Shares 88,381 Value ($000) $2,173 Avg Close $24.06 Range $21.50 - $26.46

Q2 2016

Shares 86,851 Value ($000) $1,989 Avg Close $22.14 Range $19.61 - $25.27

Q1 2016

Shares 82,956 Value ($000) $1,794 Avg Close $18.82 Range $15.79 - $22.57

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	160,941	$3,838	$26.44	$22.81 - $29.04
Q4 2017	162,173	$4,249	$26.38	$23.89 - $29.04
Q3 2017	161,617	$4,590	$24.49	$22.26 - $29.24
Q2 2017	160,942	$3,999	$26.24	$22.26 - $28.69
Q1 2017	159,757	$4,162	$27.74	$23.30 - $33.05
Q4 2016	114,282	$3,674	$27.19	$20.43 - $34.13
Q3 2016	88,381	$2,173	$24.06	$21.50 - $26.46
Q2 2016	86,851	$1,989	$22.14	$19.61 - $25.27
Q1 2016	82,956	$1,794	$18.82	$15.79 - $22.57