Natural Gas Services Group

NGS • NYSE

Natural Gas Services Group is a oil & gas equipment & services company in the energy sector on NYSE, led by John W. Chisholm, with a market cap of $420.3M. As of Q3 2025, 74% of shares are held by 110 institutional investors, with DIMENSIONAL FUND ADVISORS LP as the largest holder at 6.84%.

Interim Chief Executive OfficerJohn W. Chisholm

Market Cap$420.3M

Oil & Gas Equipment & Services

Energy

Employees266.0

Websitengsgi.com

Country

United States of America

Overview

Overview of institutional ownership in NGS as of Q3 2025 with a market cap of $351.1M

All Institutions

Institutions: 110
Value Held: $260.7M
Shares Held: 9.3M
Avg Position: $2.4M
Median Position: $395.8K

Hedge Funds

Hedge Funds: 14
Value Held: $50.0M
Shares Held: 1.8M
Avg Position: $3.6M
Median Position: $865.2K

Ownership Breakdown

Institutional (non-HF)

60.03%

$210.7M

Hedge Funds

14.23%

$50.0M

Retail & Other

25.74%

$90.4M

Based on market cap of $351.1M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in NGS as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$24.0M 0.01% of portfolio	6.84% 857.4K shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
B BlackRock, Inc. Institution	-	$21.3M 0.00% of portfolio	6.07% 761.6K shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
A AWM Investment Company, Inc. Hedge Fund•Event Driven	David Michael Greenhouse President	$18.9M 1.78% of portfolio	5.39% 676.7K shares	Q2 2020 Held for 5y 5m	$1.1B
AEGIS FINANCIAL CORP Long Only Manager	Scott Lon Barbee President	$18.8M 7.19% of portfolio	5.35% 671.1K shares	Q2 2023 Held for 2y 5m	$261.3M
VANGUARD GROUP INC Institution	Salim Ramji CEO	$17.1M 0.00% of portfolio	4.88% 611.7K shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
AMERIPRISE FINANCIAL INC Institution	Jim Cracchiolo CEO	$14.3M 0.00% of portfolio	4.06% 509.3K shares	≤ Q2 2013 Held for 12y 5m+	$433.11B
M Mill Road Capital Management LLC Private Equity	Thomas Edward Lynch Chairman	$11.3M 5.91% of portfolio	3.23% 404.7K shares	Q4 2020 Held for 4y 11m	$191.8M
Pacific Ridge Capital Partners, LLC Long Only Manager	Mark Daniel Cooper President	$11.0M 2.38% of portfolio	3.12% 391.3K shares	Q4 2013 Held for 11y 11m	$460.6M
R ROYCE & ASSOCIATES LLC Institution	-	$10.1M 0.10% of portfolio	2.88% 361.6K shares	≤ Q2 2013 Held for 12y 5m+	$10.0B
CANNELL CAPITAL LLC Hedge Fund•Long/Short	James Carlo Cannell President	$10.0M 2.64% of portfolio	2.86% 359.0K shares	Q1 2025 Held for 8 months	$380.9M

Net Capital Flow

Institutional buying and selling activity for NGS in Q3 2025

Traded: +$2.8M
Buyers: 56
Sellers: 43
Total Bought: +$13.9M
Total Sold: −$11.1M
Avg Position: $2.2M

Biggest Buyers

Institution	Net Bought	Current Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$2.7M +96.7K shares	$4.7M 169.0K shares
A AMERICAN CENTURY COMPANIES INC Institution	+$2.1M +73.3K shares	$6.3M 226.7K shares
CANNELL CAPITAL LLC Hedge Fund•Long/Short	+$767.1K +27.4K shares	$10.0M 359.0K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$763.1K +27.3K shares	$1.2M 41.4K shares
UBS Group AG Institution	+$717.8K +25.6K shares	$2.1M 73.3K shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	+$587.8K +21.0K shares	$843.3K 30.1K shares
J JANE STREET GROUP, LLC Institution	+$482.9K +17.3K shares	$482.9K 17.3K shares
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	+$478.0K +17.1K shares	$870.9K 31.1K shares
A Acuitas Investments, LLC Fund of Funds	+$461.8K +16.5K shares	$6.1M 216.7K shares
Q Qube Research & Technologies Ltd Institution	+$454.9K +16.3K shares	$2.6M 94.2K shares

Biggest Sellers

Institution	Net Sold	Current Position
Invesco Ltd. ETF Provider	−$2.6M −92.4K shares	$564.3K 20.2K shares
A Assenagon Asset Management S.A. Institution	−$1.5M −57.3K shares	Sold Off 0 shares
S Squarepoint Ops LLC Hedge Fund•Quant	−$1.2M −44.6K shares	$859.4K 30.7K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$1.0M −36.4K shares	$8.4M 300.9K shares
HighTower Advisors, LLC RIA/Wealth	−$380.0K −14.7K shares	Sold Off 0 shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	−$370.3K −14.3K shares	Sold Off 0 shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$341.0K −13.2K shares	Sold Off 0 shares
B BlackRock, Inc. Institution	−$308.3K −11.0K shares	$21.3M 761.6K shares
R Russell Investments Group, Ltd. RIA/Wealth	−$275.6K −9.8K shares	$3.8M 137.2K shares
E EntryPoint Capital, LLC Hedge Fund•Long/Short	−$266.7K −10.3K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited NGS in Q3 2025

New Positions: 7
New Value: $239.9K
Exited Positions: 11
Exited Value: $4.0M

New Positions

Institution	Position Value
A ARTHUR M. COHEN & ASSOCIATES, LLC RIA/Wealth	$218.3K 7.8K shares
U UMB BANK N A/MO Institution	$14.0K 500.0 shares
O Optiver Holding B.V. Institution	$4.8K 170.0 shares
SIGNATUREFD, LLC RIA/Wealth	$1.2K 43.0 shares
SRS Capital Advisors, Inc. RIA/Wealth	$867.0 31.0 shares
Global Retirement Partners, LLC RIA/Wealth	$756.0 27.0 shares
True Wealth Design, LLC RIA/Wealth	$28.0 1.0 shares

Exited Positions

Institution	Previous Position
A Assenagon Asset Management S.A. Institution	$1.5M 57.3K shares
HighTower Advisors, LLC RIA/Wealth	$380.0K 14.7K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	$370.3K 14.3K shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$341.0K 13.2K shares
E EntryPoint Capital, LLC Hedge Fund•Long/Short	$266.7K 10.3K shares
Verition Fund Management LLC Hedge Fund•Multi-Strategy	$233.4K 9.0K shares
M Man Group plc Institution	$230.9K 8.9K shares
LOS ANGELES CAPITAL MANAGEMENT & EQUITY RESEARCH INC Long Only Manager	$224.8K 8.7K shares
C Cubist Systematic Strategies, LLC Institution	$215.6K 8.4K shares
Calamos Advisors LLC Long Only Manager	$211.9K 8.2K shares

Options Activity

Institutions with the largest Call and Put options positions in NGS as of Q3 2025

Call Positions: 4
Call Value: $7.3M
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$3.2M 1.1K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$2.1M 733.0 contracts
J JANE STREET GROUP, LLC Institution	$1.0M 370.0 contracts
P PEAK6 LLC Institution	$1.0M 366.0 contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with NGS as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
AEGIS FINANCIAL CORP Long Only Manager	Scott Lon Barbee President	7.19% $18.8M	5.35% 671.1K shares	Q2 2023 Held for 2y 5m	$261.3M
M Mill Road Capital Management LLC Private Equity	Thomas Edward Lynch Chairman	5.91% $11.3M	3.23% 404.7K shares	Q4 2020 Held for 4y 11m	$191.8M
A Acuitas Investments, LLC Fund of Funds	Lisa Marie Thenell COO	3.89% $6.1M	1.73% 216.7K shares	Q3 2020 Held for 5y 2m	$155.8M
CANNELL CAPITAL LLC Hedge Fund•Long/Short	James Carlo Cannell President	2.64% $10.0M	2.86% 359.0K shares	Q1 2025 Held for 8 months	$380.9M
Pacific Ridge Capital Partners, LLC Long Only Manager	Mark Daniel Cooper President	2.38% $11.0M	3.12% 391.3K shares	Q4 2013 Held for 11y 11m	$460.6M
A AWM Investment Company, Inc. Hedge Fund•Event Driven	David Michael Greenhouse President	1.78% $18.9M	5.39% 676.7K shares	Q2 2020 Held for 5y 5m	$1.1B
C CROWN ADVISORS MANAGEMENT, INC. Hedge Fund•Long/Short	Robert Scott Fearon President	1.31% $2.0M	0.56% 70.0K shares	Q4 2024 Held for 11 months	$149.5M
WHITE PINE CAPITAL LLC RIA/Wealth	Michael Scott Wallace President	0.42% $1.5M	0.42% 52.7K shares	Q2 2022 Held for 3y 5m	$349.2M
TrueWealth Advisors, LLC RIA/Wealth	Larry Jason Sims Managing Partner	0.25% $857.7K	0.24% 30.6K shares	Q1 2025 Held for 8 months	$336.6M
PERRITT CAPITAL MANAGEMENT INC Long Only Manager	Mark J Buh President	0.20% $419.9K	0.12% 15.0K shares	Q4 2023 Held for 1y 11m	$211.0M

Hedge Fund Spotlight

Discover hedge funds investing in NGS

TWO SIGMA ADVISERS, LLC

Hedge Fund • Multi-Strategy

Portfolio ManagerScott David Hoffman

Portfolio Value: $50.0B
Positions: 2,312
Last Reported: Q3 2025

Sector Allocation

Position in Natural Gas Services Group

Market Value: $843.3K
Shares Held: 30.1K
Portfolio Weight: 0.00%
Owned Since: 2024-Q2

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