NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2025

Shares 855,645 Value ($000) $28,793 Avg Close $29.70 Range $25.36 - $34.47

Q3 2025

Shares 857,397 Value ($000) $23,999 Avg Close $25.41 Range $22.48 - $28.73

Q2 2025

Shares 858,635 Value ($000) $22,163 Avg Close $22.21 Range $16.55 - $27.54

Q1 2025

Shares 877,791 Value ($000) $19,285 Avg Close $25.04 Range $20.01 - $29.42

Q4 2024

Shares 902,167 Value ($000) $24,178 Avg Close $23.22 Range $18.21 - $28.20

Q3 2024

Shares 918,733 Value ($000) $17,557 Avg Close $19.78 Range $16.52 - $22.59

Q2 2024

Shares 921,915 Value ($000) $18,548 Avg Close $21.72 Range $17.81 - $24.97

Q1 2024

Shares 903,914 Value ($000) $17,563 Avg Close $15.93 Range $13.55 - $19.94

Q4 2023

Shares 891,342 Value ($000) $14,333 Avg Close $14.30 Range $12.61 - $16.27

Q3 2023

Shares 876,822 Value ($000) $12,767 Avg Close $10.78 Range $9.52 - $15.23

Q2 2023

Shares 913,581 Value ($000) $9,044 Avg Close $10.23 Range $9.45 - $11.09

Q1 2023

Shares 947,672 Value ($000) $9,770 Avg Close $10.89 Range $9.31 - $12.54

Q4 2022

Shares 925,630 Value ($000) $11 Avg Close $10.80 Range $9.88 - $12.25

Q3 2022

Shares 917,553 Value ($000) $9,212 Avg Close $10.16 Range $9.01 - $12.32

Q2 2022

Shares 933,036 Value ($000) $10,263 Avg Close $12.63 Range $10.83 - $14.84

Q1 2022

Shares 928,773 Value ($000) $11,062 Avg Close $11.42 Range $9.74 - $13.89

Q4 2021

Shares 943,255 Value ($000) $9,876 Avg Close $11.19 Range $9.41 - $12.83

Q3 2021

Shares 967,753 Value ($000) $10,045 Avg Close $9.70 Range $8.82 - $10.76

Q2 2021

Shares 1,015,801 Value ($000) $10,443 Avg Close $9.89 Range $8.77 - $11.52

Q1 2021

Shares 1,036,135 Value ($000) $9,781 Avg Close $9.42 Range $7.92 - $10.65

Q4 2020

Shares 1,022,687 Value ($000) $9,695 Avg Close $9.94 Range $8.27 - $12.10

Q3 2020

Shares 1,021,678 Value ($000) $8,633 Avg Close $7.49 Range $6.05 - $10.02

Q2 2020

Shares 1,044,110 Value ($000) $6,547 Avg Close $5.74 Range $3.96 - $8.23

Q1 2020

Shares 1,106,591 Value ($000) $4,936 Avg Close $9.28 Range $2.59 - $13.00

Q4 2019

Shares 1,102,945 Value ($000) $13,522 Avg Close $11.66 Range $10.44 - $12.91

Q3 2019

Shares 1,112,436 Value ($000) $14,250 Avg Close $13.56 Range $10.11 - $16.51

Q2 2019

Shares 1,111,097 Value ($000) $18,333 Avg Close $16.22 Range $14.71 - $18.54

Q1 2019

Shares 1,099,722 Value ($000) $19,036 Avg Close $17.65 Range $15.90 - $19.02

Q4 2018

Shares 1,097,734 Value ($000) $18,046 Avg Close $18.94 Range $15.26 - $20.99

Q3 2018

Shares 1,099,528 Value ($000) $23,200 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 1,091,390 Value ($000) $25,756 Avg Close $23.87 Range $21.47 - $26.42

Q1 2018

Shares 1,088,295 Value ($000) $25,956 Avg Close $26.44 Range $22.81 - $29.04

Q4 2017

Shares 1,087,793 Value ($000) $28,500 Avg Close $26.38 Range $23.89 - $29.04

Q3 2017

Shares 1,087,301 Value ($000) $30,880 Avg Close $24.49 Range $22.26 - $29.24

Q2 2017

Shares 1,086,304 Value ($000) $26,995 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 1,091,596 Value ($000) $28,436 Avg Close $27.74 Range $23.30 - $33.05

Q4 2016

Shares 1,092,461 Value ($000) $35,123 Avg Close $27.19 Range $20.43 - $34.13

Q3 2016

Shares 1,090,241 Value ($000) $26,809 Avg Close $24.06 Range $21.50 - $26.46

Q2 2016

Shares 1,065,975 Value ($000) $24,411 Avg Close $22.14 Range $19.61 - $25.27

Q1 2016

Shares 1,027,731 Value ($000) $22,230 Avg Close $18.82 Range $15.79 - $22.57

Q4 2015

Shares 996,460 Value ($000) $22,221 Avg Close $21.48 Range $18.28 - $24.21

Q3 2015

Shares 958,956 Value ($000) $18,508 Avg Close $20.31 Range $18.37 - $22.64

Q2 2015

Shares 938,977 Value ($000) $21,427 Avg Close $23.06 Range $19.10 - $25.82

Q1 2015

Shares 922,995 Value ($000) $17,740 Avg Close $19.65 Range $17.69 - $23.12

Q4 2014

Shares 915,246 Value ($000) $21,087 Avg Close $23.39 Range $20.44 - $26.73

Q3 2014

Shares 916,757 Value ($000) $22,067 Avg Close $28.91 Range $23.00 - $33.65

Q2 2014

Shares 904,421 Value ($000) $29,900 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 893,787 Value ($000) $26,938 Avg Close $29.49 Range $25.23 - $34.59

Q4 2013

Shares 896,423 Value ($000) $24,715 Avg Close $27.72 Range $24.44 - $30.62

Q3 2013

Shares 884,007 Value ($000) $23,709 Avg Close $25.86 Range $23.52 - $27.95

Q2 2013

Shares 866,860 Value ($000) $20,362 Avg Close $21.33 Range $18.17 - $23.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	855,645	$28,793	$29.70	$25.36 - $34.47
Q3 2025	857,397	$23,999	$25.41	$22.48 - $28.73
Q2 2025	858,635	$22,163	$22.21	$16.55 - $27.54
Q1 2025	877,791	$19,285	$25.04	$20.01 - $29.42
Q4 2024	902,167	$24,178	$23.22	$18.21 - $28.20
Q3 2024	918,733	$17,557	$19.78	$16.52 - $22.59
Q2 2024	921,915	$18,548	$21.72	$17.81 - $24.97
Q1 2024	903,914	$17,563	$15.93	$13.55 - $19.94
Q4 2023	891,342	$14,333	$14.30	$12.61 - $16.27
Q3 2023	876,822	$12,767	$10.78	$9.52 - $15.23
Q2 2023	913,581	$9,044	$10.23	$9.45 - $11.09
Q1 2023	947,672	$9,770	$10.89	$9.31 - $12.54
Q4 2022	925,630	$11	$10.80	$9.88 - $12.25
Q3 2022	917,553	$9,212	$10.16	$9.01 - $12.32
Q2 2022	933,036	$10,263	$12.63	$10.83 - $14.84
Q1 2022	928,773	$11,062	$11.42	$9.74 - $13.89
Q4 2021	943,255	$9,876	$11.19	$9.41 - $12.83
Q3 2021	967,753	$10,045	$9.70	$8.82 - $10.76
Q2 2021	1,015,801	$10,443	$9.89	$8.77 - $11.52
Q1 2021	1,036,135	$9,781	$9.42	$7.92 - $10.65
Q4 2020	1,022,687	$9,695	$9.94	$8.27 - $12.10
Q3 2020	1,021,678	$8,633	$7.49	$6.05 - $10.02
Q2 2020	1,044,110	$6,547	$5.74	$3.96 - $8.23
Q1 2020	1,106,591	$4,936	$9.28	$2.59 - $13.00
Q4 2019	1,102,945	$13,522	$11.66	$10.44 - $12.91
Q3 2019	1,112,436	$14,250	$13.56	$10.11 - $16.51
Q2 2019	1,111,097	$18,333	$16.22	$14.71 - $18.54
Q1 2019	1,099,722	$19,036	$17.65	$15.90 - $19.02
Q4 2018	1,097,734	$18,046	$18.94	$15.26 - $20.99
Q3 2018	1,099,528	$23,200	$21.85	$20.28 - $24.24
Q2 2018	1,091,390	$25,756	$23.87	$21.47 - $26.42
Q1 2018	1,088,295	$25,956	$26.44	$22.81 - $29.04
Q4 2017	1,087,793	$28,500	$26.38	$23.89 - $29.04
Q3 2017	1,087,301	$30,880	$24.49	$22.26 - $29.24
Q2 2017	1,086,304	$26,995	$26.24	$22.26 - $28.69
Q1 2017	1,091,596	$28,436	$27.74	$23.30 - $33.05
Q4 2016	1,092,461	$35,123	$27.19	$20.43 - $34.13
Q3 2016	1,090,241	$26,809	$24.06	$21.50 - $26.46
Q2 2016	1,065,975	$24,411	$22.14	$19.61 - $25.27
Q1 2016	1,027,731	$22,230	$18.82	$15.79 - $22.57
Q4 2015	996,460	$22,221	$21.48	$18.28 - $24.21
Q3 2015	958,956	$18,508	$20.31	$18.37 - $22.64
Q2 2015	938,977	$21,427	$23.06	$19.10 - $25.82
Q1 2015	922,995	$17,740	$19.65	$17.69 - $23.12
Q4 2014	915,246	$21,087	$23.39	$20.44 - $26.73
Q3 2014	916,757	$22,067	$28.91	$23.00 - $33.65
Q2 2014	904,421	$29,900	$30.73	$28.13 - $34.48
Q1 2014	893,787	$26,938	$29.49	$25.23 - $34.59
Q4 2013	896,423	$24,715	$27.72	$24.44 - $30.62
Q3 2013	884,007	$23,709	$25.86	$23.52 - $27.95
Q2 2013	866,860	$20,362	$21.33	$18.17 - $23.75