NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

SEGALL BRYANT & HAMILL, LLC's Holding History (CIK: 0001006378)

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

Q3 2019

Shares 26,213 Value ($000) $336 Avg Close $13.56 Range $10.11 - $16.51

Q2 2019

Shares 52,188 Value ($000) $861 Avg Close $16.22 Range $14.71 - $18.54

Q1 2019

Shares 47,416 Value ($000) $821 Avg Close $17.65 Range $15.90 - $19.02

Q4 2018

Shares 40,858 Value ($000) $672 Avg Close $18.94 Range $15.26 - $20.99

Q3 2018

Shares 32,566 Value ($000) $687 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 29,897 Value ($000) $706 Avg Close $23.87 Range $21.47 - $26.42

Q1 2018

Shares 24,100 Value ($000) $575 Avg Close $26.44 Range $22.81 - $29.04

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2019	26,213	$336	$13.56	$10.11 - $16.51
Q2 2019	52,188	$861	$16.22	$14.71 - $18.54
Q1 2019	47,416	$821	$17.65	$15.90 - $19.02
Q4 2018	40,858	$672	$18.94	$15.26 - $20.99
Q3 2018	32,566	$687	$21.85	$20.28 - $24.24
Q2 2018	29,897	$706	$23.87	$21.47 - $26.42
Q1 2018	24,100	$575	$26.44	$22.81 - $29.04