NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

WHITTIER TRUST CO's Holding History (CIK: 0001137881)

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

Q2 2017

Shares 116 Value ($000) $3 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 116 Value ($000) $3 Avg Close $27.74 Range $23.30 - $33.05

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	116	$3	$26.24	$22.26 - $28.69
Q1 2017	116	$3	$27.74	$23.30 - $33.05