NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

TEACHER RETIREMENT SYSTEM OF TEXAS's Holding History (CIK: 0000796848)

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

Q2 2016
Shares 1,777 Value ($000) $41 Avg Close $22.14 Range $19.61 - $25.27
Q1 2016
Shares 1,557 Value ($000) $34 Avg Close $18.82 Range $15.79 - $22.57
Q4 2015
Shares 1,155 Value ($000) $26 Avg Close $21.48 Range $18.28 - $24.21
Q3 2015
Shares 1,551 Value ($000) $30 Avg Close $20.31 Range $18.37 - $22.64
Q2 2015
Shares 485 Value ($000) $11 Avg Close $23.06 Range $19.10 - $25.82
Q1 2015
Shares 379 Value ($000) $7 Avg Close $19.65 Range $17.69 - $23.12
Q4 2014
Shares 372 Value ($000) $9 Avg Close $23.39 Range $20.44 - $26.73
Q3 2014
Shares 445 Value ($000) $11 Avg Close $28.91 Range $23.00 - $33.65
Q2 2014
Shares 454 Value ($000) $15 Avg Close $30.73 Range $28.13 - $34.48
Q1 2014
Shares 454 Value ($000) $14 Avg Close $29.49 Range $25.23 - $34.59
Q4 2013
Shares 464 Value ($000) $13 Avg Close $27.72 Range $24.44 - $30.62
Q3 2013
Shares 1,557 Value ($000) $42 Avg Close $25.86 Range $23.52 - $27.95
Q2 2013
Shares 840 Value ($000) $20 Avg Close $21.33 Range $18.17 - $23.75