NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2025

Shares 80,238 Value ($000) $2,700 Avg Close $29.70 Range $25.36 - $34.47

Q3 2025

Shares 88,324 Value ($000) $2,472 Avg Close $25.41 Range $22.48 - $28.73

Q2 2025

Shares 85,658 Value ($000) $2,211 Avg Close $22.21 Range $16.55 - $27.54

Q1 2025

Shares 94,248 Value ($000) $2,071 Avg Close $25.04 Range $20.01 - $29.42

Q4 2024

Shares 96,529 Value ($000) $2,587 Avg Close $23.22 Range $18.21 - $28.20

Q3 2024

Shares 92,145 Value ($000) $1,761 Avg Close $19.78 Range $16.52 - $22.59

Q2 2024

Shares 33,534 Value ($000) $675 Avg Close $21.72 Range $17.81 - $24.97

Q1 2024

Shares 29,194 Value ($000) $567 Avg Close $15.93 Range $13.55 - $19.94

Q4 2023

Shares 29,154 Value ($000) $469 Avg Close $14.30 Range $12.61 - $16.27

Q3 2023

Shares 28,469 Value ($000) $415 Avg Close $10.78 Range $9.52 - $15.23

Q2 2023

Shares 30,125 Value ($000) $298 Avg Close $10.23 Range $9.45 - $11.09

Q1 2023

Shares 33,121 Value ($000) $341 Avg Close $10.89 Range $9.31 - $12.54

Q4 2022

Shares 34,961 Value ($000) $401 Avg Close $10.80 Range $9.88 - $12.25

Q3 2022

Shares 35,040 Value ($000) $352 Avg Close $10.16 Range $9.01 - $12.32

Q2 2022

Shares 34,562 Value ($000) $380 Avg Close $12.63 Range $10.83 - $14.84

Q1 2022

Shares 34,762 Value ($000) $414 Avg Close $11.42 Range $9.74 - $13.89

Q4 2021

Shares 36,086 Value ($000) $377 Avg Close $11.19 Range $9.41 - $12.83

Q3 2021

Shares 37,902 Value ($000) $394 Avg Close $9.70 Range $8.82 - $10.76

Q2 2021

Shares 42,278 Value ($000) $434 Avg Close $9.89 Range $8.77 - $11.52

Q1 2021

Shares 67,462 Value ($000) $637 Avg Close $9.42 Range $7.92 - $10.65

Q4 2020

Shares 291,685 Value ($000) $2,766 Avg Close $9.94 Range $8.27 - $12.10

Q3 2020

Shares 444,516 Value ($000) $3,756 Avg Close $7.49 Range $6.05 - $10.02

Q2 2020

Shares 443,893 Value ($000) $2,783 Avg Close $5.74 Range $3.96 - $8.23

Q1 2020

Shares 565,764 Value ($000) $2,524 Avg Close $9.28 Range $2.59 - $13.00

Q4 2019

Shares 565,191 Value ($000) $6,929 Avg Close $11.66 Range $10.44 - $12.91

Q3 2019

Shares 558,152 Value ($000) $7,150 Avg Close $13.56 Range $10.11 - $16.51

Q2 2019

Shares 558,338 Value ($000) $9,212 Avg Close $16.22 Range $14.71 - $18.54

Q1 2019

Shares 558,283 Value ($000) $9,664 Avg Close $17.65 Range $15.90 - $19.02

Q4 2018

Shares 555,576 Value ($000) $9,133 Avg Close $18.94 Range $15.26 - $20.99

Q3 2018

Shares 547,633 Value ($000) $11,555 Avg Close $21.85 Range $20.28 - $24.24

Q2 2018

Shares 573,795 Value ($000) $13,541 Avg Close $23.87 Range $21.47 - $26.42

Q1 2018

Shares 576,613 Value ($000) $13,752 Avg Close $26.44 Range $22.81 - $29.04

Q4 2017

Shares 577,551 Value ($000) $15,132 Avg Close $26.38 Range $23.89 - $29.04

Q3 2017

Shares 580,478 Value ($000) $16,486 Avg Close $24.49 Range $22.26 - $29.24

Q2 2017

Shares 575,993 Value ($000) $14,313 Avg Close $26.24 Range $22.26 - $28.69

Q1 2017

Shares 540,434 Value ($000) $14,078 Avg Close $27.74 Range $23.30 - $33.05

Q4 2016

Shares 537,537 Value ($000) $17,281 Avg Close $27.19 Range $20.43 - $34.13

Q3 2016

Shares 545,968 Value ($000) $13,425 Avg Close $24.06 Range $21.50 - $26.46

Q2 2016

Shares 539,509 Value ($000) $12,354 Avg Close $22.14 Range $19.61 - $25.27

Q1 2016

Shares 539,031 Value ($000) $11,621 Avg Close $18.82 Range $15.79 - $22.57

Q4 2015

Shares 543,459 Value ($000) $12,119 Avg Close $21.48 Range $18.28 - $24.21

Q3 2015

Shares 551,563 Value ($000) $10,646 Avg Close $20.31 Range $18.37 - $22.64

Q2 2015

Shares 527,190 Value ($000) $12,030 Avg Close $23.06 Range $19.10 - $25.82

Q1 2015

Shares 551,280 Value ($000) $10,595 Avg Close $19.65 Range $17.69 - $23.12

Q4 2014

Shares 538,777 Value ($000) $12,414 Avg Close $23.39 Range $20.44 - $26.73

Q3 2014

Shares 536,406 Value ($000) $12,911 Avg Close $28.91 Range $23.00 - $33.65

Q2 2014

Shares 506,021 Value ($000) $16,729 Avg Close $30.73 Range $28.13 - $34.48

Q1 2014

Shares 509,278 Value ($000) $15,350 Avg Close $29.49 Range $25.23 - $34.59

Q4 2013

Shares 505,938 Value ($000) $13,949 Avg Close $27.72 Range $24.44 - $30.62

Q3 2013

Shares 480,072 Value ($000) $12,876 Avg Close $25.86 Range $23.52 - $27.95

Q2 2013

Shares 465,622 Value ($000) $10,937 Avg Close $21.33 Range $18.17 - $23.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	80,238	$2,700	$29.70	$25.36 - $34.47
Q3 2025	88,324	$2,472	$25.41	$22.48 - $28.73
Q2 2025	85,658	$2,211	$22.21	$16.55 - $27.54
Q1 2025	94,248	$2,071	$25.04	$20.01 - $29.42
Q4 2024	96,529	$2,587	$23.22	$18.21 - $28.20
Q3 2024	92,145	$1,761	$19.78	$16.52 - $22.59
Q2 2024	33,534	$675	$21.72	$17.81 - $24.97
Q1 2024	29,194	$567	$15.93	$13.55 - $19.94
Q4 2023	29,154	$469	$14.30	$12.61 - $16.27
Q3 2023	28,469	$415	$10.78	$9.52 - $15.23
Q2 2023	30,125	$298	$10.23	$9.45 - $11.09
Q1 2023	33,121	$341	$10.89	$9.31 - $12.54
Q4 2022	34,961	$401	$10.80	$9.88 - $12.25
Q3 2022	35,040	$352	$10.16	$9.01 - $12.32
Q2 2022	34,562	$380	$12.63	$10.83 - $14.84
Q1 2022	34,762	$414	$11.42	$9.74 - $13.89
Q4 2021	36,086	$377	$11.19	$9.41 - $12.83
Q3 2021	37,902	$394	$9.70	$8.82 - $10.76
Q2 2021	42,278	$434	$9.89	$8.77 - $11.52
Q1 2021	67,462	$637	$9.42	$7.92 - $10.65
Q4 2020	291,685	$2,766	$9.94	$8.27 - $12.10
Q3 2020	444,516	$3,756	$7.49	$6.05 - $10.02
Q2 2020	443,893	$2,783	$5.74	$3.96 - $8.23
Q1 2020	565,764	$2,524	$9.28	$2.59 - $13.00
Q4 2019	565,191	$6,929	$11.66	$10.44 - $12.91
Q3 2019	558,152	$7,150	$13.56	$10.11 - $16.51
Q2 2019	558,338	$9,212	$16.22	$14.71 - $18.54
Q1 2019	558,283	$9,664	$17.65	$15.90 - $19.02
Q4 2018	555,576	$9,133	$18.94	$15.26 - $20.99
Q3 2018	547,633	$11,555	$21.85	$20.28 - $24.24
Q2 2018	573,795	$13,541	$23.87	$21.47 - $26.42
Q1 2018	576,613	$13,752	$26.44	$22.81 - $29.04
Q4 2017	577,551	$15,132	$26.38	$23.89 - $29.04
Q3 2017	580,478	$16,486	$24.49	$22.26 - $29.24
Q2 2017	575,993	$14,313	$26.24	$22.26 - $28.69
Q1 2017	540,434	$14,078	$27.74	$23.30 - $33.05
Q4 2016	537,537	$17,281	$27.19	$20.43 - $34.13
Q3 2016	545,968	$13,425	$24.06	$21.50 - $26.46
Q2 2016	539,509	$12,354	$22.14	$19.61 - $25.27
Q1 2016	539,031	$11,621	$18.82	$15.79 - $22.57
Q4 2015	543,459	$12,119	$21.48	$18.28 - $24.21
Q3 2015	551,563	$10,646	$20.31	$18.37 - $22.64
Q2 2015	527,190	$12,030	$23.06	$19.10 - $25.82
Q1 2015	551,280	$10,595	$19.65	$17.69 - $23.12
Q4 2014	538,777	$12,414	$23.39	$20.44 - $26.73
Q3 2014	536,406	$12,911	$28.91	$23.00 - $33.65
Q2 2014	506,021	$16,729	$30.73	$28.13 - $34.48
Q1 2014	509,278	$15,350	$29.49	$25.23 - $34.59
Q4 2013	505,938	$13,949	$27.72	$24.44 - $30.62
Q3 2013	480,072	$12,876	$25.86	$23.52 - $27.95
Q2 2013	465,622	$10,937	$21.33	$18.17 - $23.75