NGS · Natural Gas Services Group Inc

$34.91 +0.22 (+0.63%)

Russell 2000 member Rebalance outlook locked

Market Cap

$447.44M

12.90M

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.

Quarter:

Holders: 160

Total Value: $476,561,967

Total Shares: 11,017,753

Showing 1–100 of 163 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 160 13F filers · Δ vs Mar 31, 2026

Top Holder

8.7%

+0.8 pts

Top 5

30.7%

+0.5 pts

Top 10

48.0%

+1.9 pts

HHI

332

Broadly held+17

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +10

Institutional value: +18.5%

Shares held: +3.4%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega BlackRock, Inc.	+171,797	961,577
Mega STATE STREET CORP	+104,169	303,156
Mega AMERICAN CENTURY COMPANIES INC	+69,143	408,165
Large First Eagle Investment Management, LLC	+60,497	347,685
Mega MORGAN STANLEY	+59,176	322,382

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Small CANNELL CAPITAL LLC	−69,294	122,387
Mega Qube Research & Technologies Ltd	−60,360	122,284
Large Walleye Capital LLC	−53,272	7,998
Mega BANK OF AMERICA CORP /DE/	−49,545	46,336
Large MARSHALL WACE, LLP	−45,193	69,089

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega NORGES BANK	61,000	$2,631,540
Mid XTX Topco Ltd	39,550	$1,706,187
Large LSV ASSET MANAGEMENT	37,000	$1,596,180
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	24,700	$1,065,558
Small Dynamic Technology Lab Private Ltd	15,978	$689,290

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega JANE STREET GROUP, LLC	89,285	$3,369,615
Large PEAK6 LLC	60,000	$2,264,400
Mid SIMPLEX TRADING, LLC	33,348	$1,258,553
Large Assenagon Asset Management S.A.	21,662	$817,523
Large HRT FINANCIAL LP	12,880	$486,091

Filter: New 26 Increased 71 Reduced 40 Sold out 16 Unchanged 23

Showing 100 of 163

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$41,482,428

8.70%

961,577

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	53,310	$2,299,793	5.5%	Sole
BlackRock Investment Management, LLC	34,911	$1,506,060	3.6%	Sole
BLACKROCK ADVISORS LLC	25,999	$1,121,596	2.7%	Sole
BlackRock Fund Advisors	447,251	$19,294,408	46.5%	Sole
BlackRock Institutional Trust Company, N.A.	374,964	$16,175,946	39.0%	Sole
Aperio Group, LLC	25,142	$1,084,625	2.6%	Sole

DIMENSIONAL FUND ADVISORS LP

$36,672,449

7.70%

850,080

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	1,651	$71,224	0.2%	Defined
DFA Australia Ltd.	6,239	$269,150	0.7%	Defined
Dimensional Ireland Ltd	31,991	$1,380,091	3.8%	Defined
Held directly	810,199	$34,951,984	95.3%	Sole

AEGIS FINANCIAL CORP

$25,231,378

5.29%

584,872

VANGUARD CAPITAL MANAGEMENT LLC

$22,132,157

4.64%

513,031

WEBER CAPITAL MANAGEMENT LLC /ADV

$20,694,775

4.34%

479,712

TWO SIGMA INVESTMENTS, LP

$17,701,636

3.71%

410,330

AMERICAN CENTURY COMPANIES INC

$17,608,238

3.69%

408,165

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	408,165	$17,608,238	100.0%	Defined

AMERIPRISE FINANCIAL INC

$16,400,576

3.44%

380,171

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	380,171	$16,400,576	100.0%	Defined

ROYCE & ASSOCIATES LP

$15,673,581

3.29%

363,319

First Eagle Investment Management, LLC

$14,999,130

3.15%

347,685

MORGAN STANLEY

$13,907,556

2.92%

322,382

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	757	$32,656	0.2%	Defined
MORGAN STANLEY & CO. LLC	64,179	$2,768,682	19.9%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	198,209	$8,550,736	61.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	7,315	$315,568	2.3%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	51,922	$2,239,914	16.1%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$13,819,941

2.90%

320,351

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	41,645	$1,796,565	13.0%	Defined
Held directly	278,706	$12,023,376	87.0%	Defined

STATE STREET CORP

$13,078,149

2.74%

303,156

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	303,156	$13,078,149	100.0%	Defined

Pacific Ridge Capital Partners, LLC

$13,072,412

2.74%

303,023

RENAISSANCE TECHNOLOGIES LLC

$9,238,085

1.94%

214,142

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$8,587,620

1.80%

199,064

AWM Investment Company, Inc.

$8,185,038

1.72%

189,732

CITADEL ADVISORS LLC

$7,969,984

1.67%

184,747

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	146,526	$6,321,131	79.3%	Defined
Held directly	38,221	$1,648,853	20.7%	Defined

MILLENNIUM MANAGEMENT LLC

$7,716,494

1.62%

178,871

Phocas Financial Corp.

$6,661,937

1.40%

154,426

Russell Investments Group, Ltd.

$6,366,727

1.34%

147,583

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	82,144	$3,543,691	55.7%	Defined
Russell Investments Canada Limited	1,447	$62,423	1.0%	Defined
Russell Investments Capital, LLC	25,196	$1,086,955	17.1%	Defined
Russell Investments France SAS	12,619	$544,383	8.6%	Defined
Russell Investments Limited joint	4,377	$188,823	3.0%	Defined
Russell Investments Trust Company	21,800	$940,452	14.8%	Defined

RBF Capital, LLC

$6,039,600

1.27%

140,000

CANNELL CAPITAL LLC

$5,279,775

1.11%

122,387

Qube Research & Technologies Ltd

$5,275,331

1.11%

122,284

VANGUARD PORTFOLIO MANAGEMENT LLC

$5,044,662

1.06%

116,937

NORTHERN TRUST CORP

$4,985,905

1.05%

115,575

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	99,009	$4,271,248	85.7%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	14,700	$634,158	12.7%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	1,866	$80,499	1.6%	Other

BNP PARIBAS ARBITRAGE, SA

$4,600,406

0.97%

106,639

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$4,317,106

0.91%

100,072

Bank of New York Mellon Corp

$4,219,134

0.89%

97,801

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	79,147	$3,414,401	80.9%	Defined
The Bank of New York Mellon	18,653	$804,690	19.1%	Defined
Held directly	1	$43	0.0%	Defined

Empowered Funds, LLC

$3,870,089

0.81%

89,710

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Bridgeway Capital Management, LLC	89,710	$3,870,089	100.0%	Other

Connor, Clark & Lunn Investment Management Ltd.

$3,470,871

0.73%

80,456

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	62,467	$2,694,826	77.6%	Sole
Held directly	17,989	$776,045	22.4%	Sole

CROWN ADVISORS MANAGEMENT, INC.

$3,451,200

0.72%

80,000

PRUDENTIAL FINANCIAL INC

$3,446,454

0.72%

79,890

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	64,190	$2,769,156	80.3%	Defined
Prudential Trust Co	15,700	$677,298	19.7%	Defined

VANGUARD FIDUCIARY TRUST CO

$3,413,754

0.72%

79,132

Uniplan Investment Counsel, Inc.

$3,332,521

0.70%

77,249

RAYMOND JAMES FINANCIAL INC

$3,256,508

0.68%

75,487

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	34,126	$1,472,195	45.2%	Defined
Raymond James Financial Services Advisors, Inc.	8,222	$354,697	10.9%	Defined
ClariVest Asset Management LLC joint	33,139	$1,429,616	43.9%	Defined

MARSHALL WACE, LLP

$2,980,498

0.63%

69,089

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	69,089	$2,980,498	100.0%	Other

NORGES BANK

$2,631,540

0.55%

61,000

Trexquant Investment LP

$2,449,489

0.51%

56,780

Invesco Ltd.

$2,413,379

0.51%

55,943

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	1,667	$71,914	3.0%	Defined
Invesco Trust Co joint	4,698	$202,671	8.4%	Defined
Invesco Capital Management LLC	49,578	$2,138,794	88.6%	Defined

GOLDMAN SACHS GROUP INC

$2,266,876

0.48%

52,547

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	21,020	$906,802	40.0%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	31,527	$1,360,074	60.0%	Defined

WHITE PINE CAPITAL LLC

$2,097,251

0.44%

48,615

BANK OF AMERICA CORP /DE/

$1,998,935

0.42%

46,336

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	46,336	$1,998,935	100.0%	Defined

Steward Partners Investment Advisory, LLC

$1,934,440

0.41%

44,841

ACADIAN ASSET MANAGEMENT LLC

$1,913,000

0.40%

44,344

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	44,344	$1,913,000	100.0%	Defined

RICE HALL JAMES & ASSOCIATES, LLC

$1,869,817

0.39%

43,343

JPMORGAN CHASE & CO

$1,843,974

0.39%

42,744

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	6,044	$260,737	14.1%	Defined
J.P. Morgan Investment Management Inc.	96	$4,141	0.2%	Defined
J.P. Morgan Securities LLC	36,436	$1,571,849	85.2%	Defined
J.P. Morgan Securities plc	168	$7,247	0.4%	Defined

D. E. Shaw & Co., Inc.

$1,743,805

0.37%

40,422

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	40,422	$1,743,805	100.0%	Defined

Numerai GP LLC

$1,735,781

0.36%

40,236

XTX Topco Ltd

$1,706,187

0.36%

39,550

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	39,550	$1,706,187	100.0%	Defined

LSV ASSET MANAGEMENT

$1,596,180

0.33%

37,000

GSA CAPITAL PARTNERS LLP

$1,594,885

0.33%

36,970

FIRST TRUST ADVISORS LP

$1,582,806

0.33%

36,690

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$1,484,749

0.31%

34,417

NEW YORK STATE COMMON RETIREMENT FUND

$1,466,975

0.31%

34,005

Informed Momentum Co LLC

$1,451,704

0.30%

33,651

UBS Group AG

$1,343,422

0.28%

31,141

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	1,004	$43,312	3.2%	Defined
UBS AG	30,137	$1,300,110	96.8%	Defined

Calamos Advisors LLC

$1,304,811

0.27%

30,246

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	19,777	$853,179	65.4%	Other
Held directly	10,469	$451,632	34.6%	Sole

Illumine Investment Management, LLC

$1,256,204

0.26%

TrueWealth Advisors, LLC

$1,169,956

0.25%

27,120

NOMURA ASSET MANAGEMENT INTERNATIONAL INC.

$1,065,558

0.22%

24,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NOMURA HOLDINGS INC joint	24,700	$1,065,558	100.0%	Defined

Point72 Asset Management, L.P.

$1,028,112

0.22%

23,832

SEI INVESTMENTS CO

$997,180

0.21%

23,115

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI INVESTMENTS MANAGEMENT CORP	1	$43	0.0%	Sole
SEI TRUST CO	23,114	$997,137	100.0%	Sole

AQR CAPITAL MANAGEMENT LLC

$966,291

0.20%

22,399

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Prism Planning Partners LLC	6	$258	0.0%	Other
Compound Planning, Inc.	2	$86	0.0%	Other
Arax Advisory Partners	101	$4,357	0.5%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	94	$4,055	0.4%	Other
Stokes Family Office, LLC	3	$129	0.0%	Other
Held directly	22,193	$957,406	99.1%	Defined

STIFEL FINANCIAL CORP

$929,494

0.20%

21,546

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STIFEL NICOLAUS & CO INC \MO\	21,401	$923,239	99.3%	Defined
Stifel Independent Advisors, LLC	115	$4,961	0.5%	Defined
Held directly	30	$1,294	0.1%	Defined

Squarepoint Ops LLC

$901,065

0.19%

20,887

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	20,887	$901,065	100.0%	Defined

Jump Financial, LLC

$848,002

0.18%

19,657

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Leap GP LLC joint	19,657	$848,002	100.0%	Defined

Creative Planning

$842,653

0.18%

19,533

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CREATIVE PLANNING TRUST Co LLC	22	$949	0.1%	Defined
Held directly	19,511	$841,704	99.9%	Sole

Nuveen, LLC

$824,404

0.17%

19,110

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	3,398	$146,589	17.8%	Defined
TEACHERS ADVISORS, LLC joint	15,712	$677,815	82.2%	Defined

ARTHUR M. COHEN & ASSOCIATES, LLC

$813,016

0.17%

18,846

HSBC HOLDINGS PLC

$799,513

0.17%

18,533

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	18,533	$799,513	100.0%	Defined

North Star Investment Management Corp.

$733,380

0.15%

17,000

LAZARD ASSET MANAGEMENT LLC

$727,944

0.15%

16,874

STRS OHIO

$694,554

0.15%

16,100

FMR LLC

$690,713

0.14%

16,011

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	13,748	$593,088	85.9%	Defined
FIAM LLC	2,263	$97,625	14.1%	Defined

Dynamic Technology Lab Private Ltd

$689,290

0.14%

15,978

CITADEL ADVISORS LLC

$664,356

0.14%

15,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	15,400	$664,356	100.0%	Defined

BRASADA CAPITAL MANAGEMENT, LP

$647,100

0.14%

15,000

OneDigital Investment Advisors LLC

$644,123

0.14%

14,931

Voleon Capital Management LP

$634,632

0.13%

14,711

PRINCIPAL FINANCIAL GROUP INC

$605,814

0.13%

14,043

RHUMBLINE ADVISERS

$583,252

0.12%

13,520

Vanguard Global Advisers, LLC

$574,322

0.12%

13,313

Kestra Advisory Services, LLC

$560,820

0.12%

13,000

Quadrature Capital Ltd

$531,829

0.11%

12,328

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	12,328	$531,829	100.0%	Other

DEUTSCHE BANK AG\

$506,592

0.11%

11,743

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	190	$8,196	1.6%	Defined
DWS Investments UK Ltd	11,553	$498,396	98.4%	Defined

WELLS FARGO & COMPANY/MN

$473,891

0.10%

10,985

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	10,660	$459,872	97.0%	Defined
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	75	$3,235	0.7%	Defined
WELLS FARGO CLEARING SERVICES, LLC	249	$10,741	2.3%	Defined
Wells Fargo Securities, LLC	1	$43	0.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$461,598

0.10%

10,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	10,700	$461,598	100.0%	Other

BARCLAYS PLC

$456,464

0.10%

10,581

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	10,050	$433,557	95.0%	Defined
BARCLAYS CAPITAL INC.	531	$22,907	5.0%	Defined

CITIGROUP INC

$455,902

0.10%

10,568

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citibank, N.A. joint	917	$39,559	8.7%	Defined
Citigroup Financial Products Inc. joint	9,651	$416,343	91.3%	Defined

STATE OF WISCONSIN INVESTMENT BOARD

$453,832

0.10%

10,520

PDT Partners, LLC

$434,635

0.09%

10,075

PRICE T ROWE ASSOCIATES INC /MD/

$419,752

0.09%

9,730

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	9,730	$419,752	100.0%	Defined

R Squared Ltd

$418,932

0.09%

9,711

LPL Financial LLC

$418,371

0.09%

9,698

CITADEL ADVISORS LLC

$409,830

0.09%

9,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	9,500	$409,830	100.0%	Defined

Quantbot Technologies LP

$401,590

0.08%

9,309

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	9,309	$401,590	100.0%	Sole

Susquehanna Portfolio Strategies, LLC

$361,168

0.08%

8,372

Aquatic Capital Management LLC

$357,458

0.08%

8,286

Walleye Capital LLC

$345,033

0.07%

7,998

Key facts CIK 1084991 CUSIP 63886Q109 13F (30d) 137 filings 137 filers Visit website Investor relations