NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q2 2019

Shares 3,023 Value ($000) $50 Avg Close $16.22 Range $14.71 - $18.54

Q2 2014

Shares 6,451 Value ($000) $213 Avg Close $30.73 Range $28.13 - $34.48

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	3,023	$50	$16.22	$14.71 - $18.54
Q2 2014	6,451	$213	$30.73	$28.13 - $34.48