NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

THOMPSON DAVIS & CO., INC.'s Holding History (CIK: 0001017284)

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

Q3 2014

Shares 750 Value ($000) $18 Avg Close $28.91 Range $23.00 - $33.65

Q2 2014

Shares 1,750 Value ($000) $58 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 2,250 Value ($000) $68 Avg Close $29.49 Range $25.23 - $34.59

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	750	$18	$28.91	$23.00 - $33.65
Q2 2014	1,750	$58	$30.73	$28.13 - $34.48
Q1 2014	2,250	$68	$29.49	$25.23 - $34.59