NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q2 2014

Shares 125,400 Value ($000) $4,146 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 128,476 Value ($000) $3,872 Avg Close $29.49 Range $25.23 - $34.59

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	125,400	$4,146	$30.73	$28.13 - $34.48
Q1 2014	128,476	$3,872	$29.49	$25.23 - $34.59