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Equibles

NGS

Natural Gas Services Group Inc

Company with tickers: NGS

CIK
1084991
CUSIP
63886Q109
Shares Outstanding
12,598,365
13F Activity (30d)
116 filings 112 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 150
Total Value: $402,225,608
Total Shares: 10,657,809
Showing 1–100 of 153 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 150 13F filers · Δ vs Dec 31, 2025
Top Holder
7.9%
Jun 2023 → Mar 2026 · range 7.9% – 11.5%
−0.7 pts
Top 5
30.2%
Jun 2023 → Mar 2026 · range 30.2% – 50.6%
−6.3 pts
Top 10
46.1%
Jun 2023 → Mar 2026 · range 46.1% – 79.8%
−10.7 pts
HHI
315
Jun 2023 → Mar 2026 · range 315 – 721
Broadly held −100

Quarterly Activity

vs Dec 31, 2025
New
32
Increased
57
Decreased
36
Sold Out
17
Unchanged
25
Holder count: +15
Institutional value: +19.7%
Shares held: +6.7%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP +304,445 365,209
Small Phocas Financial Corp. +118,777 162,465
Mega MILLENNIUM MANAGEMENT LLC +113,436 212,542
Mega MORGAN STANLEY +88,451 263,206
Mega CITADEL ADVISORS LLC +86,796 228,139

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Small AWM Investment Company, Inc. −461,876 214,776
Mega AMERIPRISE FINANCIAL INC −176,054 337,571
Small CANNELL CAPITAL LLC −134,571 191,681
Mega LPL Financial LLC −98,915 7,805
Small AEGIS FINANCIAL CORP −84,100 587,012

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 510,995 $19,284,951
Large MARSHALL WACE, LLP 114,282 $4,313,002
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 78,916 $2,978,289
Mega VANGUARD FIDUCIARY TRUST CO 74,951 $2,828,650
Large Walleye Capital LLC 61,270 $2,312,329

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 640,540 $21,554,169
Small Mill Road Capital Management LLC 109,000 $3,667,850
Large TWO SIGMA ADVISERS, LP 32,030 $1,077,809
Small Rothschild Wealth LLC 17,000 $572,050
Micro Perritt Capital Management Inc 17,000 $572,050
Filter: New 32 Increased 57 Reduced 36 Sold out 17 Unchanged 25
Showing 100 of 153
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega DIMENSIONAL FUND ADVISORS LP $31,844,896 7.92% 843,797
Mega BlackRock, Inc. $29,806,294 7.41% 789,780
Small AEGIS FINANCIAL CORP $22,153,832 5.51% 587,012
Mega VANGUARD CAPITAL MANAGEMENT LLC $19,284,951 4.79% 510,995
Micro WEBER CAPITAL MANAGEMENT LLC /ADV $18,181,773 4.52% 481,764
Mega TWO SIGMA INVESTMENTS, LP $13,782,987 3.43% 365,209
Mid ROYCE & ASSOCIATES LP $13,334,145 3.32% 353,316
Mega AMERICAN CENTURY COMPANIES INC $12,794,690 3.18% 339,022
Mega AMERIPRISE FINANCIAL INC $12,739,929 3.17% 337,571
Small Pacific Ridge Capital Partners, LLC $11,524,814 2.87% 305,374
Large First Eagle Investment Management, LLC $10,838,475 2.69% 287,188
Mega GEODE CAPITAL MANAGEMENT, LLC $10,786,582 2.68% 285,813
Mega MORGAN STANLEY $9,933,390 2.47% 263,206
Large RENAISSANCE TECHNOLOGIES LLC $8,983,705 2.23% 238,042
Small AWM Investment Company, Inc. $8,105,646 2.02% 214,776
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $8,057,603 2.00% 213,503
Mega MILLENNIUM MANAGEMENT LLC $8,021,335 1.99% 212,542
Mega STATE STREET CORP $7,509,769 1.87% 198,987
Mega CITADEL ADVISORS LLC $7,247,551 1.80% 192,039
Small CANNELL CAPITAL LLC $7,234,040 1.80% 191,681
Large Qube Research & Technologies Ltd $6,892,984 1.71% 182,644
Large Russell Investments Group, Ltd. $6,775,117 1.68% 179,521
Small Phocas Financial Corp. $6,131,429 1.52% 162,465
Mid RBF Capital, LLC $5,283,600 1.31% 140,000
Large MARSHALL WACE, LLP $4,313,002 1.07% 114,282
Large PRUDENTIAL FINANCIAL INC $4,152,532 1.03% 110,030
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $3,693,462 0.92% 97,866
Large Empowered Funds, LLC $3,628,663 0.90% 96,149
Mega BANK OF AMERICA CORP /DE/ Bank $3,618,548 0.90% 95,881
Mega Bank of New York Mellon Corp Bank $3,601,112 0.90% 95,419
Mega RAYMOND JAMES FINANCIAL INC $3,240,581 0.81% 85,866
Mega NORTHERN TRUST CORP Bank $3,194,010 0.79% 84,632
Mega BNP PARIBAS ARBITRAGE, SA $3,081,735 0.77% 81,657
Small CROWN ADVISORS MANAGEMENT, INC. $3,019,200 0.75% 80,000
Mega JANE STREET GROUP, LLC $2,995,989 0.74% 79,385
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $2,978,289 0.74% 78,916
Mega VANGUARD FIDUCIARY TRUST CO Bank $2,828,650 0.70% 74,951
Large Connor, Clark & Lunn Investment Management Ltd. $2,582,095 0.64% 68,418
Large Walleye Capital LLC $2,312,329 0.57% 61,270
Large PEAK6 LLC $2,264,400 0.56% 60,000
Mega GOLDMAN SACHS GROUP INC $2,152,463 0.54% 57,034
Mega JPMORGAN CHASE & CO $2,072,641 0.52% 54,919
Mega UBS Group AG $2,066,679 0.51% 54,761
Mega Invesco Ltd. $1,953,647 0.49% 51,766
Large SEI INVESTMENTS CO $1,723,736 0.43% 45,674
Small Uniplan Investment Counsel, Inc. $1,646,898 0.41% 43,638
Mid RICE HALL JAMES & ASSOCIATES, LLC $1,644,256 0.41% 43,568
Large Trexquant Investment LP $1,504,505 0.37% 39,865
Mega D. E. Shaw & Co., Inc. $1,495,221 0.37% 39,619
Small WHITE PINE CAPITAL LLC $1,447,819 0.36% 38,363
Large Point72 Asset Management, L.P. $1,406,607 0.35% 37,271
Small Informed Momentum Co LLC $1,330,561 0.33% 35,256
Mega FIRST TRUST ADVISORS LP $1,322,220 0.33% 35,035
Mid SIMPLEX TRADING, LLC $1,258,553 0.31% 33,348
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $1,192,772 0.30% 31,605
Small TrueWealth Advisors, LLC $1,152,957 0.29% 30,550
Large Steward Partners Investment Advisory, LLC $1,130,048 0.28% 29,943
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,093,365 0.27% 28,971
Small Illumine Investment Management, LLC $1,056,153 0.26% 27,985
Large Calamos Advisors LLC $982,975 0.24% 26,046
Mid Quadrature Capital Ltd $900,816 0.22% 23,869
Large Assenagon Asset Management S.A. $817,523 0.20% 21,662
Mega CITADEL ADVISORS LLC $796,314 0.20% 21,100
Large STIFEL FINANCIAL CORP $758,157 0.19% 20,089
Mid Jump Financial, LLC $716,342 0.18% 18,981
Small State of Wyoming $699,699 0.17% 18,540
Large Creative Planning $679,735 0.17% 18,011
Mid North Star Investment Management Corp. $641,580 0.16% 17,000
Large ACADIAN ASSET MANAGEMENT LLC $628,710 0.16% 16,659
Mega FMR LLC $601,574 0.15% 15,940
Mega AQR CAPITAL MANAGEMENT LLC $601,535 0.15% 15,939
Large STRS OHIO $596,292 0.15% 15,800
Mid GSA CAPITAL PARTNERS LLP $575,270 0.14% 15,243
Mega Nuveen, LLC $568,137 0.14% 15,054
Mega CITADEL ADVISORS LLC $566,100 0.14% 15,000
Small BRASADA CAPITAL MANAGEMENT, LP $566,100 0.14% 15,000
Small ARTHUR M. COHEN & ASSOCIATES, LLC $543,078 0.14% 14,390
Large LAZARD ASSET MANAGEMENT LLC $535,039 0.13% 14,177
Large Kestra Advisory Services, LLC $490,620 0.12% 13,000
Large HRT FINANCIAL LP $486,091 0.12% 12,880
Mega RHUMBLINE ADVISERS $482,279 0.12% 12,779
Mega PRINCIPAL FINANCIAL GROUP INC $480,240 0.12% 12,725
Mid Voleon Capital Management LP $427,896 0.11% 11,338
Large STATE OF WISCONSIN INVESTMENT BOARD $426,914 0.11% 11,312
Large Boston Partners $415,668 0.10% 11,014
Small R Squared Ltd $399,817 0.10% 10,594
Small Numerai GP LLC $398,307 0.10% 10,554
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $390,042 0.10% 10,335
Mid Brevan Howard Capital Management LP $386,948 0.10% 10,253
Large Squarepoint Ops LLC $382,910 0.10% 10,146
Mid PDT Partners, LLC $380,230 0.09% 10,075
Mega FRANKLIN RESOURCES INC $379,588 0.09% 10,058
Mega JANE STREET GROUP, LLC $373,626 0.09% 9,900
Mega DEUTSCHE BANK AG\ Bank $367,776 0.09% 9,745
Mega BARCLAYS PLC $355,208 0.09% 9,412
Mid Engineers Gate Manager LP $353,661 0.09% 9,371
Mid Magnetar Financial LLC $338,904 0.08% 8,980
Large Centiva Capital, LP $323,620 0.08% 8,575
Mid Quantbot Technologies LP $312,260 0.08% 8,274
Mega PRICE T ROWE ASSOCIATES INC /MD/ $302,599 0.08% 8,018

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