NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

Swiss National Bank's Holding History (CIK: 0001582202)

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

Q1 2019

Shares 23,100 Value ($000) $400 Avg Close $17.65 Range $15.90 - $19.02

Q4 2018

Shares 23,100 Value ($000) $380 Avg Close $18.94 Range $15.26 - $20.99

Q3 2018

Shares 21,600 Value ($000) $456 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 21,600 Value ($000) $510 Avg Close $23.87 Range $21.47 - $26.42

Q1 2018

Shares 21,600 Value ($000) $515 Avg Close $26.44 Range $22.81 - $29.04

Q4 2017

Shares 21,600 Value ($000) $566 Avg Close $26.38 Range $23.89 - $29.04

Q3 2017

Shares 21,600 Value ($000) $613 Avg Close $24.49 Range $22.26 - $29.24

Q2 2017

Shares 21,600 Value ($000) $537 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 21,600 Value ($000) $563 Avg Close $27.74 Range $23.30 - $33.05

Q4 2016

Shares 21,600 Value ($000) $694 Avg Close $27.19 Range $20.43 - $34.13

Q3 2016

Shares 21,600 Value ($000) $531 Avg Close $24.06 Range $21.50 - $26.46

Q2 2016

Shares 21,600 Value ($000) $495 Avg Close $22.14 Range $19.61 - $25.27

Q1 2016

Shares 21,600 Value ($000) $452 Avg Close $18.82 Range $15.79 - $22.57

Q4 2015

Shares 17,800 Value ($000) $397 Avg Close $21.48 Range $18.28 - $24.21

Q3 2015

Shares 17,800 Value ($000) $344 Avg Close $20.31 Range $18.37 - $22.64

Q2 2015

Shares 14,900 Value ($000) $340 Avg Close $23.06 Range $19.10 - $25.82

Q1 2015

Shares 14,900 Value ($000) $286 Avg Close $19.65 Range $17.69 - $23.12

Q4 2014

Shares 14,900 Value ($000) $343 Avg Close $23.39 Range $20.44 - $26.73

Q3 2014

Shares 14,900 Value ($000) $359 Avg Close $28.91 Range $23.00 - $33.65

Q2 2014

Shares 14,900 Value ($000) $493 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 14,900 Value ($000) $449 Avg Close $29.49 Range $25.23 - $34.59

Q4 2013

Shares 11,800 Value ($000) $325 Avg Close $27.72 Range $24.44 - $30.62

Q3 2013

Shares 7,400 Value ($000) $198 Avg Close $25.86 Range $23.52 - $27.95

Q2 2013

Shares 8,100 Value ($000) $190 Avg Close $21.33 Range $18.17 - $23.75

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	23,100	$400	$17.65	$15.90 - $19.02
Q4 2018	23,100	$380	$18.94	$15.26 - $20.99
Q3 2018	21,600	$456	$21.85	$20.28 - $24.24
Q2 2018	21,600	$510	$23.87	$21.47 - $26.42
Q1 2018	21,600	$515	$26.44	$22.81 - $29.04
Q4 2017	21,600	$566	$26.38	$23.89 - $29.04
Q3 2017	21,600	$613	$24.49	$22.26 - $29.24
Q2 2017	21,600	$537	$26.24	$22.26 - $28.69
Q1 2017	21,600	$563	$27.74	$23.30 - $33.05
Q4 2016	21,600	$694	$27.19	$20.43 - $34.13
Q3 2016	21,600	$531	$24.06	$21.50 - $26.46
Q2 2016	21,600	$495	$22.14	$19.61 - $25.27
Q1 2016	21,600	$452	$18.82	$15.79 - $22.57
Q4 2015	17,800	$397	$21.48	$18.28 - $24.21
Q3 2015	17,800	$344	$20.31	$18.37 - $22.64
Q2 2015	14,900	$340	$23.06	$19.10 - $25.82
Q1 2015	14,900	$286	$19.65	$17.69 - $23.12
Q4 2014	14,900	$343	$23.39	$20.44 - $26.73
Q3 2014	14,900	$359	$28.91	$23.00 - $33.65
Q2 2014	14,900	$493	$30.73	$28.13 - $34.48
Q1 2014	14,900	$449	$29.49	$25.23 - $34.59
Q4 2013	11,800	$325	$27.72	$24.44 - $30.62
Q3 2013	7,400	$198	$25.86	$23.52 - $27.95
Q2 2013	8,100	$190	$21.33	$18.17 - $23.75