Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in NGS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | DIMENSIONAL FUND ADVISORS LP | 844K | $31.8M | -1.4% | 6.698% | 0.01% |
| 2 | BlackRock, Inc. | 790K | $29.8M | -0.2% | 6.269% | 0.00% |
| 3 | AEGIS FINANCIAL CORP | 587K | $22.2M | -12.5% | 4.659% | 3.82% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 511K | $19.3M | — | 4.056% | 0.00% |
| 5 | WEBER CAPITAL MANAGEMENT LLC /ADV | 482K | $18.2M | -3.4% | 3.824% | 18.16% |
| 6 | TWO SIGMA INVESTMENTS, LP | 365K | $13.8M | +501.0% | 2.899% | 0.01% |
| 7 | ROYCE & ASSOCIATES LP | 353K | $13.3M | -0.4% | 2.804% | 0.13% |
| 8 | AMERICAN CENTURY COMPANIES INC | 339K | $12.8M | +22.1% | 2.691% | 0.01% |
| 9 | AMERIPRISE FINANCIAL INC | 338K | $12.7M | -34.3% | 2.679% | 0.00% |
| 10 | Pacific Ridge Capital Partners, LLC | 305K | $11.5M | -11.7% | 2.424% | 2.50% |
| 11 | First Eagle Investment Management, LLC | 287K | $10.8M | -2.7% | 2.280% | 0.01% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 286K | $10.8M | +15.6% | 2.269% | 0.00% |
| 13 | MORGAN STANLEY | 263K | $9.9M | +50.6% | 2.089% | 0.00% |
| 14 | RENAISSANCE TECHNOLOGIES LLC | 238K | $9.0M | -7.2% | 1.889% | 0.01% |
| 15 | CITADEL ADVISORS LLC | 228K | $8.6M | +61.4% | 1.811% | 0.00% |
| 16 | AWM Investment Company, Inc. | 215K | $8.1M | -68.3% | 1.705% | 0.90% |
| 17 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 214K | $8.1M | 0.0% | 1.695% | 0.16% |
| 18 | MILLENNIUM MANAGEMENT LLC | 213K | $8.0M | +114.5% | 1.687% | 0.01% |
| 19 | STATE STREET CORP | 199K | $7.5M | +0.1% | 1.579% | 0.00% |
| 20 | CANNELL CAPITAL LLC | 192K | $7.2M | -41.3% | 1.521% | 4.56% |
| 21 | Qube Research & Technologies Ltd | 183K | $6.9M | +74.1% | 1.450% | 0.01% |
| 22 | Russell Investments Group, Ltd. | 180K | $6.8M | +8.0% | 1.425% | 0.01% |
| 23 | Phocas Financial Corp. | 162K | $6.1M | +271.9% | 1.290% | 0.96% |
| 24 | RBF Capital, LLC | 140K | $5.3M | 0.0% | 1.111% | 0.28% |
| 25 | MARSHALL WACE, LLP | 114K | $4.3M | — | 0.907% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in NGS — a direct measure of their conviction.
Filings activity in NGS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 145 | +12% | 72.99% | +11.59 pp | $390M | +19% |
| Q4 2025 | 129 | +17% | 61.40% | +12.26 pp | $328M | +25% |
| Q3 2025 | 110 | +4.8% | 49.14% | +4.61 pp | $262M | +10% |
| Q2 2025 | 105 | 2.8% | 44.53% | +8.09 pp | $238M | +22% |
| Q1 2025 | 108 | +11% | 36.44% | 8.08 pp | $194M | 18% |
| Q4 2024 | 97 | +14% | 44.52% | +12.42 pp | $238M | +39% |
| Q3 2024 | 85 | +4.9% | 32.10% | 1.03 pp | $171M | 3.1% |
| Q2 2024 | 81 | — | 33.13% | — | $177M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying NGS stock.
Based on Q1 2026 13F filings, institutional ownership of Natural Gas Services Group, Inc. stands at 73.0%, held across 145 reporting institutions.
DIMENSIONAL FUND ADVISORS LP is the largest reported institutional holder of NGS, with approximately 843,797 shares worth $0.03B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of NGS, including TWO SIGMA INVESTMENTS, LP, RENAISSANCE TECHNOLOGIES LLC, CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for NGS is 76 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
34 institutions opened new positions in NGS during Q1 2026, while 18 fully exited. 90 added to existing positions and 20 trimmed.
NGS institutional ownership rose by 11.59 percentage points quarter-over-quarter, with a net change of +16 holders.
The top 10 institutions account for 47.6% of all reported 13F value in NGS, and the top 25 account for 77.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Natural Gas Services Group, Inc. (NGS) Institutional Ownership