Who owns Natural Gas Services Group (NGS)
Which tracked institutional funds hold NGS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See NGS company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
51 tracked funds added or opened NGS while 19 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
NGS’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes NGS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in NGS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 154 tracked filers holding NGS, 92 increased or opened the position and 59 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in NGS between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 5
- NORGES BANK$3M
- XTX Topco Ltd$2M
- NOMURA ASSET MANAGEMENT INTERNATIONAL INC.$1M
- Dynamic Technology Lab Private Ltd$689K
- OneDigital Investment Advisors LLC$644K
Full exits 5
- JANE STREET GROUP, LLC$3M
- SIMPLEX TRADING, LLC$1M
- Assenagon Asset Management S.A.$818K
- ACADIAN ASSET MANAGEMENT LLC$628K
- GSA CAPITAL PARTNERS LLP$575K
Largest adds
- BlackRock, Inc.$12M
- STATE STREET CORP$6M
- DIMENSIONAL FUND ADVISORS LP$5M
- AMERICAN CENTURY COMPANIES INC$5M
- First Eagle Investment Management, LLC$4M
- MORGAN STANLEY$4M
Largest trims
- Walleye Capital LLC$2M
- CANNELL CAPITAL LLC$2M
- BANK OF AMERICA CORP /DE/$2M
- Qube Research & Technologies Ltd$2M
- MARSHALL WACE, LLP$1M
- SEI INVESTMENTS CO$727K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 961,577 | $41M | 8.9% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 850,080 | $37M | 7.9% | 2026-Q2 |
| AEGIS FINANCIAL CORP trimmed | 584,872 | $25M | 5.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 513,031 | $22M | 4.8% | 2026-Q2 |
| WEBER CAPITAL MANAGEMENT LLC /ADV trimmed | 479,712 | $21M | 4.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 410,330 | $18M | 3.8% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 408,165 | $18M | 3.8% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 380,171 | $16M | 3.5% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 363,319 | $16M | 3.4% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 347,685 | $15M | 3.2% | 2026-Q2 |
| MORGAN STANLEY added | 322,382 | $14M | 3.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 320,351 | $14M | 3.0% | 2026-Q2 |
| STATE STREET CORP added | 303,156 | $13M | 2.8% | 2026-Q2 |
| Pacific Ridge Capital Partners, LLC trimmed | 303,023 | $13M | 2.8% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 214,142 | $9M | 2.0% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 199,064 | $9M | 1.8% | 2026-Q2 |
| AWM Investment Company, Inc. trimmed | 189,732 | $8M | 1.8% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 184,747 | $8M | 1.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 178,871 | $8M | 1.7% | 2026-Q2 |
| Phocas Financial Corp. trimmed | 154,426 | $7M | 1.4% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 147,583 | $6M | 1.4% | 2026-Q2 |
| RBF Capital, LLC | 140,000 | $6M | 1.3% | 2026-Q2 |
| CANNELL CAPITAL LLC trimmed | 122,387 | $5M | 1.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 122,284 | $5M | 1.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 116,937 | $5M | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 115,575 | $5M | 1.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 106,639 | $5M | 1.0% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 100,072 | $4M | 0.9% | 2026-Q2 |
| Bank of New York Mellon Corp added | 97,801 | $4M | 0.9% | 2026-Q2 |
| Empowered Funds, LLC trimmed | 89,710 | $4M | 0.8% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 80,456 | $3M | 0.7% | 2026-Q2 |
| CROWN ADVISORS MANAGEMENT, INC. | 80,000 | $3M | 0.7% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 79,890 | $3M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 79,132 | $3M | 0.7% | 2026-Q2 |
| Uniplan Investment Counsel, Inc. added | 77,249 | $3M | 0.7% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 75,487 | $3M | 0.7% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 69,089 | $3M | 0.6% | 2026-Q2 |
| NORGES BANK new | 61,000 | $3M | 0.6% | 2026-Q2 |
| Trexquant Investment LP added | 56,780 | $2M | 0.5% | 2026-Q2 |
| Invesco Ltd. added | 55,943 | $2M | 0.5% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 52,547 | $2M | 0.5% | 2026-Q2 |
| WHITE PINE CAPITAL LLC added | 48,615 | $2M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 46,336 | $2M | 0.4% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC added | 44,841 | $2M | 0.4% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 43,343 | $2M | 0.4% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 42,744 | $2M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 40,422 | $2M | 0.4% | 2026-Q2 |
| Numerai GP LLC added | 40,236 | $2M | 0.4% | 2026-Q2 |
| XTX Topco Ltd added | 39,550 | $2M | 0.4% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 36,690 | $2M | 0.3% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 34,417 | $1M | 0.3% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 34,005 | $1M | 0.3% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 33,651 | $1M | 0.3% | 2026-Q2 |
| UBS Group AG trimmed | 31,141 | $1M | 0.3% | 2026-Q2 |
| Calamos Advisors LLC added | 30,246 | $1M | 0.3% | 2026-Q2 |
| TrueWealth Advisors, LLC trimmed | 27,120 | $1M | 0.3% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 24,700 | $1M | 0.2% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 23,832 | $1M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 23,115 | $997K | 0.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 22,399 | $966K | 0.2% | 2026-Q2 |
| STIFEL FINANCIAL CORP added | 21,546 | $929K | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC added | 20,887 | $901K | 0.2% | 2026-Q2 |
| Jump Financial, LLC added | 19,657 | $848K | 0.2% | 2026-Q2 |
| Creative Planning added | 19,533 | $843K | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 19,110 | $824K | 0.2% | 2026-Q2 |
| ARTHUR M. COHEN & ASSOCIATES, LLC added | 18,846 | $813K | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 18,533 | $805K | 0.2% | 2026-Q2 |
| North Star Investment Management Corp. | 17,000 | $733K | 0.2% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 16,874 | $728K | 0.2% | 2026-Q2 |
| STRS OHIO added | 16,100 | $695K | 0.1% | 2026-Q2 |
| FMR LLC added | 16,011 | $691K | 0.1% | 2026-Q2 |
| Dynamic Technology Lab Private Ltd added | 15,978 | $689K | 0.1% | 2026-Q2 |
| OneDigital Investment Advisors LLC new | 14,931 | $644K | 0.1% | 2026-Q2 |
| Voleon Capital Management LP added | 14,711 | $635K | 0.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 14,043 | $606K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 13,520 | $583K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 13,313 | $574K | 0.1% | 2026-Q2 |
| Kestra Advisory Services, LLC | 13,000 | $561K | 0.1% | 2026-Q2 |
| Quadrature Capital Ltd trimmed | 12,328 | $532K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 11,743 | $507K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 10,985 | $474K | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 10,581 | $456K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 10,568 | $456K | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 10,520 | $454K | 0.1% | 2026-Q2 |
| PDT Partners, LLC | 10,075 | $435K | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 9,730 | $420K | 0.1% | 2026-Q2 |
| R Squared Ltd trimmed | 9,711 | $419K | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 9,698 | $418K | 0.1% | 2026-Q2 |
| Quantbot Technologies LP added | 9,309 | $402K | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC new | 8,372 | $361K | 0.1% | 2026-Q2 |
| Aquatic Capital Management LLC added | 8,286 | $357K | 0.1% | 2026-Q2 |
| Walleye Capital LLC trimmed | 7,998 | $345K | 0.1% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 7,825 | $338K | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd new | 7,793 | $336K | 0.1% | 2026-Q2 |
| Boston Partners trimmed | 7,588 | $327K | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 7,553 | $326K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 7,401 | $319K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP trimmed | 7,314 | $316K | 0.1% | 2026-Q2 |
| Illumine Investment Management, LLC trimmed | 0 | $1M | 0.3% | 2026-Q2 |
| BRASADA CAPITAL MANAGEMENT, LP trimmed | 0 | $647K | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.