NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

BRIDGEWAY CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001107261)

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

Q4 2025

Shares 213,503 Value ($000) $7,184 Avg Close $29.70 Range $25.36 - $34.47

Q3 2025

Shares 233,503 Value ($000) $6,536 Avg Close $25.41 Range $22.48 - $28.73

Q2 2025

Shares 239,163 Value ($000) $6,173 Avg Close $22.21 Range $16.55 - $27.54

Q1 2025

Shares 235,833 Value ($000) $5,181 Avg Close $25.04 Range $20.01 - $29.42

Q4 2024

Shares 266,508 Value ($000) $7,142 Avg Close $23.22 Range $18.21 - $28.20

Q3 2024

Shares 262,711 Value ($000) $5,020 Avg Close $19.78 Range $16.52 - $22.59

Q2 2024

Shares 258,289 Value ($000) $5,197 Avg Close $21.72 Range $17.81 - $24.97

Q1 2024

Shares 252,349 Value ($000) $4,903 Avg Close $15.93 Range $13.55 - $19.94

Q4 2023

Shares 246,432 Value ($000) $3,963 Avg Close $14.30 Range $12.61 - $16.27

Q3 2023

Shares 239,904 Value ($000) $3,493 Avg Close $10.78 Range $9.52 - $15.23

Q2 2023

Shares 245,648 Value ($000) $2,432 Avg Close $10.23 Range $9.45 - $11.09

Q1 2023

Shares 249,514 Value ($000) $2,572 Avg Close $10.89 Range $9.31 - $12.54

Q4 2022

Shares 252,744 Value ($000) $2,896 Avg Close $10.80 Range $9.88 - $12.25

Q3 2022

Shares 202,744 Value ($000) $2,036 Avg Close $10.16 Range $9.01 - $12.32

Q2 2022

Shares 203,028 Value ($000) $2,233 Avg Close $12.63 Range $10.83 - $14.84

Q1 2022

Shares 210,028 Value ($000) $2,501 Avg Close $11.42 Range $9.74 - $13.89

Q4 2021

Shares 191,628 Value ($000) $2,006 Avg Close $11.19 Range $9.41 - $12.83

Q3 2021

Shares 193,028 Value ($000) $2,004 Avg Close $9.70 Range $8.82 - $10.76

Q2 2021

Shares 193,028 Value ($000) $1,984 Avg Close $9.89 Range $8.77 - $11.52

Q1 2021

Shares 197,428 Value ($000) $1,864 Avg Close $9.42 Range $7.92 - $10.65

Q4 2020

Shares 148,428 Value ($000) $1,407 Avg Close $9.94 Range $8.27 - $12.10

Q3 2020

Shares 148,428 Value ($000) $1,254 Avg Close $7.49 Range $6.05 - $10.02

Q2 2020

Shares 198,028 Value ($000) $1,242 Avg Close $5.74 Range $3.96 - $8.23

Q1 2020

Shares 170,728 Value ($000) $761 Avg Close $9.28 Range $2.59 - $13.00

Q4 2019

Shares 178,864 Value ($000) $2,193 Avg Close $11.66 Range $10.44 - $12.91

Q3 2019

Shares 186,764 Value ($000) $2,392 Avg Close $13.56 Range $10.11 - $16.51

Q2 2019

Shares 170,464 Value ($000) $2,813 Avg Close $16.22 Range $14.71 - $18.54

Q1 2019

Shares 200,273 Value ($000) $3,467 Avg Close $17.65 Range $15.90 - $19.02

Q4 2018

Shares 200,273 Value ($000) $3,292 Avg Close $18.94 Range $15.26 - $20.99

Q3 2018

Shares 200,273 Value ($000) $4,226 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 199,573 Value ($000) $4,710 Avg Close $23.87 Range $21.47 - $26.42

Q1 2018

Shares 199,573 Value ($000) $4,760 Avg Close $26.44 Range $22.81 - $29.04

Q4 2017

Shares 199,573 Value ($000) $5,229 Avg Close $26.38 Range $23.89 - $29.04

Q3 2017

Shares 199,573 Value ($000) $5,668 Avg Close $24.49 Range $22.26 - $29.24

Q2 2017

Shares 199,573 Value ($000) $4,959 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 199,573 Value ($000) $5,199 Avg Close $27.74 Range $23.30 - $33.05

Q4 2016

Shares 200,273 Value ($000) $6,439 Avg Close $27.19 Range $20.43 - $34.13

Q3 2016

Shares 210,688 Value ($000) $5,181 Avg Close $24.06 Range $21.50 - $26.46

Q2 2016

Shares 221,688 Value ($000) $5,077 Avg Close $22.14 Range $19.61 - $25.27

Q1 2016

Shares 221,688 Value ($000) $4,795 Avg Close $18.82 Range $15.79 - $22.57

Q4 2015

Shares 215,005 Value ($000) $4,795 Avg Close $21.48 Range $18.28 - $24.21

Q3 2015

Shares 133,105 Value ($000) $2,569 Avg Close $20.31 Range $18.37 - $22.64

Q2 2015

Shares 133,105 Value ($000) $3,037 Avg Close $23.06 Range $19.10 - $25.82

Q1 2015

Shares 133,105 Value ($000) $2,558 Avg Close $19.65 Range $17.69 - $23.12

Q4 2014

Shares 101,405 Value ($000) $2,336 Avg Close $23.39 Range $20.44 - $26.73

Q3 2014

Shares 81,405 Value ($000) $1,959 Avg Close $28.91 Range $23.00 - $33.65

Q2 2014

Shares 82,205 Value ($000) $2,718 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 82,205 Value ($000) $2,478 Avg Close $29.49 Range $25.23 - $34.59

Q4 2013

Shares 82,205 Value ($000) $2,266 Avg Close $27.72 Range $24.44 - $30.62

Q3 2013

Shares 82,205 Value ($000) $2,205 Avg Close $25.86 Range $23.52 - $27.95

Q2 2013

Shares 82,005 Value ($000) $1,926 Avg Close $21.33 Range $18.17 - $23.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	213,503	$7,184	$29.70	$25.36 - $34.47
Q3 2025	233,503	$6,536	$25.41	$22.48 - $28.73
Q2 2025	239,163	$6,173	$22.21	$16.55 - $27.54
Q1 2025	235,833	$5,181	$25.04	$20.01 - $29.42
Q4 2024	266,508	$7,142	$23.22	$18.21 - $28.20
Q3 2024	262,711	$5,020	$19.78	$16.52 - $22.59
Q2 2024	258,289	$5,197	$21.72	$17.81 - $24.97
Q1 2024	252,349	$4,903	$15.93	$13.55 - $19.94
Q4 2023	246,432	$3,963	$14.30	$12.61 - $16.27
Q3 2023	239,904	$3,493	$10.78	$9.52 - $15.23
Q2 2023	245,648	$2,432	$10.23	$9.45 - $11.09
Q1 2023	249,514	$2,572	$10.89	$9.31 - $12.54
Q4 2022	252,744	$2,896	$10.80	$9.88 - $12.25
Q3 2022	202,744	$2,036	$10.16	$9.01 - $12.32
Q2 2022	203,028	$2,233	$12.63	$10.83 - $14.84
Q1 2022	210,028	$2,501	$11.42	$9.74 - $13.89
Q4 2021	191,628	$2,006	$11.19	$9.41 - $12.83
Q3 2021	193,028	$2,004	$9.70	$8.82 - $10.76
Q2 2021	193,028	$1,984	$9.89	$8.77 - $11.52
Q1 2021	197,428	$1,864	$9.42	$7.92 - $10.65
Q4 2020	148,428	$1,407	$9.94	$8.27 - $12.10
Q3 2020	148,428	$1,254	$7.49	$6.05 - $10.02
Q2 2020	198,028	$1,242	$5.74	$3.96 - $8.23
Q1 2020	170,728	$761	$9.28	$2.59 - $13.00
Q4 2019	178,864	$2,193	$11.66	$10.44 - $12.91
Q3 2019	186,764	$2,392	$13.56	$10.11 - $16.51
Q2 2019	170,464	$2,813	$16.22	$14.71 - $18.54
Q1 2019	200,273	$3,467	$17.65	$15.90 - $19.02
Q4 2018	200,273	$3,292	$18.94	$15.26 - $20.99
Q3 2018	200,273	$4,226	$21.85	$20.28 - $24.24
Q2 2018	199,573	$4,710	$23.87	$21.47 - $26.42
Q1 2018	199,573	$4,760	$26.44	$22.81 - $29.04
Q4 2017	199,573	$5,229	$26.38	$23.89 - $29.04
Q3 2017	199,573	$5,668	$24.49	$22.26 - $29.24
Q2 2017	199,573	$4,959	$26.24	$22.26 - $28.69
Q1 2017	199,573	$5,199	$27.74	$23.30 - $33.05
Q4 2016	200,273	$6,439	$27.19	$20.43 - $34.13
Q3 2016	210,688	$5,181	$24.06	$21.50 - $26.46
Q2 2016	221,688	$5,077	$22.14	$19.61 - $25.27
Q1 2016	221,688	$4,795	$18.82	$15.79 - $22.57
Q4 2015	215,005	$4,795	$21.48	$18.28 - $24.21
Q3 2015	133,105	$2,569	$20.31	$18.37 - $22.64
Q2 2015	133,105	$3,037	$23.06	$19.10 - $25.82
Q1 2015	133,105	$2,558	$19.65	$17.69 - $23.12
Q4 2014	101,405	$2,336	$23.39	$20.44 - $26.73
Q3 2014	81,405	$1,959	$28.91	$23.00 - $33.65
Q2 2014	82,205	$2,718	$30.73	$28.13 - $34.48
Q1 2014	82,205	$2,478	$29.49	$25.23 - $34.59
Q4 2013	82,205	$2,266	$27.72	$24.44 - $30.62
Q3 2013	82,205	$2,205	$25.86	$23.52 - $27.95
Q2 2013	82,005	$1,926	$21.33	$18.17 - $23.75