Natural Gas Services Group, Inc.
US ˙ NYSE ˙ US63886Q1094

SecurityNGS / Natural Gas Services Group, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership198,987 shares
Latest Disclosed Value $ 7,509,769
State Street Corp reports 0.06% increase in ownership of NGS / Natural Gas Services Group, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 198,987 shares of Natural Gas Services Group, Inc. (US:NGS) valued at $7,509,769 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 198,877 shares of Natural Gas Services Group, Inc.. This represents a change in shares of 0.06% during the quarter. The current value of the position is $8,230,102 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 198,987 110 0.06 7,510 12.21 0.0003
2026-02-13 2025-12-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 198,877 2,734 1.39 6,692 21.89 0.0002
2025-11-14 2025-09-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 196,143 549 0.28 5,490 8.76 0.0002
2025-08-14 2025-06-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 195,594 21,452 12.32 5,048 31.97 0.0002
2025-05-15 2025-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 174,142 729 0.42 3,826 -17.69 0.0002
2025-02-14 2024-12-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 173,413 10,767 6.62 4,647 49.52 0.0002
2024-11-14 2024-09-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 162,646 26,069 19.09 3,108 13.14 0.0001
2024-08-14 2024-06-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 136,577 100,525 278.83 2,748 292.43 0.0001
2024-05-15 2024-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 36,052 -300 -0.83 700 19.86 0.0000
2024-02-14 2023-12-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 36,352 3,200 9.65 585 21.16 0.0000
2023-11-14 2023-09-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 33,152 -13,901 -29.54 483 3.66 0.0000
2023-08-14 2023-06-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 47,053 -1,700 -3.49 466 -7.37 0.0000
2023-05-15 2023-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 48,753 0 0.00 503 -10.04 0.0000
2023-05-15 2022-12-31 13F/A-99 NATURAL GAS SVCS GROUP COM 63886Q109 48,753 0 0.00 559 14.11 0.0000
2023-05-15 2022-12-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 48,753 0 559 0.0000
2022-11-15 2022-09-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 48,753 1,700 3.61 489 -5.60 0.0000
2022-08-15 2022-06-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 47,053 -4,571 -8.85 518 -15.77 0.0000
2022-05-16 2022-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 51,624 569 1.11 615 14.95 0.0000
2022-02-14 2021-12-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 51,055 -4,000 -7.27 535 -6.30 0.0000
2021-11-15 2021-09-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 55,055 0 0.00 571 0.88 0.0000
2021-08-16 2021-06-30 13F NATURAL GAS SVCS GROUP COM 63886Q109 55,055 41,456 304.85 566 342.19 0.0000
2021-07-09 2021-03-31 13F/A-1 NATURAL GAS SVCS GROUP COM 63886Q109 13,599 -3,400 -20.00 128 -20.50 0.0000
2021-05-17 2021-03-31 13F NATURAL GAS SVCS GROUP COM 63886Q109 13,599 -3,400 128 0.0000
2021-02-16 2020-12-31 13F NATURAL GAS SERVICES GROUP COM 63886Q109 16,999 0 0.00 161 11.81 0.0000
2020-11-10 2020-09-30 13F NATURAL GAS SERVICES GROUP COM 63886Q109 16,999 0 0.00 144 34.58 0.0000
2020-08-14 2020-06-30 13F NATURAL GAS SERVICES GROUP COM 63886Q109 16,999 -236,641 -93.30 107 -90.54 0.0000
2020-06-19 2020-03-31 13F/A-1 NATURAL GAS SERVICES GROUP COM 63886Q109 253,640 4,496 1.80 1,131 -62.98 0.0001
2020-05-11 2020-03-31 13F NATURAL GAS SERVICES GROUP COM 63886Q109 253,640 4,496 1,131 99.3246
2020-02-06 2019-12-31 13F NATURAL GAS SERVICES GROUP COM 63886Q109 249,144 6,579 2.71 3,055 -1.67 0.0002
2019-11-14 2019-09-30 13F NATURAL GAS SERVICES GROUP COM 63886Q109 242,565 -48,792 -16.75 3,107 -35.37 0.0002
2019-08-14 2019-06-30 13F NATURAL GAS SERVICES GROUP COM 63886Q109 291,357 -14,194 -4.65 4,807 -9.11 0.0004
2019-05-15 2019-03-31 13F NATURAL GAS SERVICES GROUP COM 63886Q109 305,551 4,381 1.45 5,289 6.83 0.0004
2019-02-12 2018-12-31 13F NATURAL GAS SERVICES GROUP COM 63886Q109 301,170 -4,059 -1.33 4,951 -23.12 0.0005
2018-11-09 2018-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 305,229 15,825 5.47 6,440 -5.67 0.0005
2018-08-14 2018-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 289,404 31,253 12.11 6,827 10.85 0.0006
2018-05-15 2018-03-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 258,151 -23,819 -8.45 6,159 -16.67 0.0005
2018-02-14 2017-12-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 281,970 34,753 14.06 7,391 5.24 0.0006
2017-11-14 2017-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 247,217 -2,923 -1.17 7,023 13.07 0.0006
2017-08-14 2017-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 250,140 15,154 6.45 6,211 1.42 0.0005
2017-05-15 2017-03-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 234,986 -8,814 -3.62 6,124 -21.89 0.0005
2017-02-09 2016-12-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 243,800 13,779 5.99 7,840 38.59 0.0007
2017-01-13 2016-09-30 13F/A-1 NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 230,021 2,186 0.96 5,657 8.43 0.0006
2016-11-14 2016-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 230,021 5,657
2016-08-12 2016-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 227,835 -4,398 -1.89 5,217 3.86 0.0006
2016-05-20 2016-03-31 13F/A-1 NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 232,233 -3,088 -1.31 5,023 -4.27 0.0005
2016-05-12 2016-03-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 232,233 5,023
2016-02-16 2015-12-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 235,321 5,388 2.34 5,247 18.23 0.0006
2015-11-16 2015-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 229,933 533 0.23 4,438 -15.27 0.0005
2015-08-13 2015-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 229,400 8,567 3.88 5,238 23.42 0.0006
2015-05-15 2015-03-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 220,833 302 0.14 4,244 -16.42 0.0004
2015-02-11 2014-12-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 220,531 2,091 0.96 5,078 -3.35 0.0005
2014-11-12 2014-09-30 13F/A-1 NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 218,440 4,536 2.12 5,254 -25.72 0.0006
2014-11-10 2014-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 218,440 5,254
2014-08-12 2014-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 213,904 -5,732 -2.61 7,073 6.91 0.0008
2014-05-15 2014-03-31 13F/A-1 NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 219,636 -9,642 -4.21 6,616 4.68 0.0008
2014-05-13 2014-03-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 219,636 6,616
2014-02-06 2013-12-31 13F/A-1 NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 229,278 -6,452 -2.74 6,320 -0.03 0.0007
2014-02-06 2013-12-31 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 257,757 4,232
2013-11-12 2013-09-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 235,730 -8,242 -3.38 6,322 10.31 0.0008
2013-08-08 2013-06-30 13F NATURAL GAS SERVICES GROUP Common equity shares 63886Q109 243,972 243,972 5,731 0.0007
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.