Aventail Capital Group, LP is an SEC-registered investment adviser based in New York, NY that reports managing 3 hedge funds on Form ADV. It reports $2.6 billion in regulatory assets under management. Its private funds, of all types, hold $1.3 billion in gross assets. Its disclosed U.S. stock holdings returned an estimated +23.2% 2026 YTD through Jun 30 (S&P 500: +9.5%), based on 13F filings. Over a longer period they returned an estimated +36.7% from Q3 2024 to Q2 2026, compared with +37.2% for the S&P 500, based on 13F filings.
- Regulatory assets under management
- $2.6 billionForm ADV Item 5.F
- Gross assets of private funds
- $1.3 billionAll private fund types, Form ADV
- Hedge funds managed
- 33 private funds in total
- Employees
- 23Form ADV Item 5.A
- Registration
- SEC-registered adviserCRD 306333
- Latest Form ADV
- 03/30/2026Disciplinary disclosures: none reported
Estimated 13F portfolio performance
Estimated by AltMountain, derived from the firm’s public Form 13F filings. Not reported by the firm and not the return of any fund.
| Quarter | Est. 13F return | S&P 500 |
|---|---|---|
| Q2 2026 | +1.6% | +14.8% |
| Q1 2026 | +21.3% | -4.6% |
| Q4 2025 | -1.3% | +2.4% |
| Q3 2025 | +5.6% | +7.8% |
| Q2 2025 | +2.6% | +10.4% |
| Q1 2025 | +0.3% | -4.5% |
| Q4 2024 | +3.8% | +2.1% |
| Q3 2024 | -0.3% | +5.4% |
Estimate of the firm's disclosed long U.S. stock portfolio from its quarterly 13F filings, holding each quarter-end portfolio to the next quarter-end at prices implied by all 13F filers. It is a price return before dividends and fees, ignores shorts, options, bonds, cash and trading within the quarter, and is not the return of any fund. Disclosures
Manager of this firm? Report your fund’s actual net return, or email hello@altmountain.com to correct or remove this estimate. Removal requests from the firm are honored.
13F holdings as of Jun 30, 2026
The 50 largest of 155 share positions ($1,743,126,999) reported by Aventail Capital Group, LP on Form 13F for the quarter ended Jun 30, 2026, filed Aug 14, 2026. Shown as filed with the SEC. Original filing on SEC.gov ↗
| Stock | Value | % of 13F portfolio | Shares | Shares vs prior quarter |
|---|---|---|---|---|
| National Fuel Gas Co | $55,692,036 | 3.19% | 721,306 | +0.13% |
| Ameren Corp | $44,100,973 | 2.53% | 390,136 | +25.22% |
| Alliant Energy Corp | $40,011,130 | 2.30% | 524,461 | +44.06% |
| Entergy Corp New | $38,731,137 | 2.22% | 337,203 | -51.31% |
| Nextpower Inc | $37,066,718 | 2.13% | 311,119 | +35.17% |
| BKV Corp | $36,766,094 | 2.11% | 1,343,790 | +80.23% |
| NRG Energy Inc | $35,210,246 | 2.02% | 241,067 | -5.12% |
| Atmos Energy Corp | $34,952,894 | 2.01% | 202,896 | -18.13% |
| Sterling Infrastructure Inc | $34,918,215 | 2.00% | 41,601 | +271.21% |
| United Rentals Inc | $33,751,059 | 1.94% | 29,792 | New |
| Tenaris S A | $31,071,126 | 1.78% | 559,941 | +540.91% |
| Occidental Pete Corp | $30,018,203 | 1.72% | 618,040 | +149.46% |
| Johnson Controls Internation | $29,753,548 | 1.71% | 203,638 | New |
| Nvent Elec PLC | $29,398,332 | 1.69% | 173,329 | +335.43% |
| Solv Energy Inc | $29,077,338 | 1.67% | 853,960 | +73.22% |
| Duke Energy Corp New | $26,137,124 | 1.50% | 206,487 | +22.96% |
| Consolidated Edison Inc | $23,549,587 | 1.35% | 212,868 | New |
| CSX Corp | $23,480,818 | 1.35% | 494,021 | +284.05% |
| Centerpoint Energy Inc | $23,477,856 | 1.35% | 533,103 | -51.20% |
| Ge Vernova Inc | $22,395,181 | 1.28% | 19,062 | -59.79% |
| CNX Res Corp | $22,011,341 | 1.26% | 648,728 | -42.65% |
| Southwest Gas Hldgs Inc | $21,976,323 | 1.26% | 247,816 | +327.98% |
| Ati Inc | $21,856,813 | 1.25% | 110,892 | -40.16% |
| Apa Corporation | $20,381,622 | 1.17% | 625,779 | -36.51% |
| Propetro Hldg Corp | $20,378,216 | 1.17% | 1,421,075 | +177.31% |
| Nisource Inc | $20,062,676 | 1.15% | 421,928 | +92.74% |
| Southern Co | $19,800,485 | 1.14% | 206,880 | -35.19% |
| Xcel Energy Inc | $18,999,221 | 1.09% | 236,603 | -7.77% |
| Innio NV | $18,985,740 | 1.09% | 480,044 | New |
| PPL Corp | $18,734,063 | 1.07% | 515,380 | -48.38% |
| Woodward Inc | $17,891,028 | 1.03% | 42,053 | -59.00% |
| Carrier Global Corporation | $17,443,950 | 1.00% | 237,818 | New |
| American Elec PWR Co Inc | $17,227,526 | 0.99% | 125,923 | -45.94% |
| Applied Aerospace & Defense | $16,580,719 | 0.95% | 727,863 | New |
| Caterpillar Inc | $16,133,235 | 0.93% | 15,150 | -45.71% |
| Permian Resources Corp | $15,923,288 | 0.91% | 864,926 | -21.32% |
| Public SVC Enterprise Group | $14,872,732 | 0.85% | 183,252 | -51.02% |
| Phillips 66 | $14,570,081 | 0.84% | 86,188 | +5.79% |
| Targa Res Corp | $14,488,677 | 0.83% | 54,034 | -54.15% |
| Vistra Corp | $14,395,514 | 0.83% | 90,749 | +177.18% |
| Ovintiv Inc | $14,218,132 | 0.82% | 270,050 | -44.58% |
| Sempra | $14,158,393 | 0.81% | 152,717 | -48.00% |
| TC Energy Corp | $13,985,268 | 0.80% | 210,971 | +170.34% |
| Talen Energy Corp | $13,893,305 | 0.80% | 36,156 | +14.17% |
| Modine MFG Co | $13,890,648 | 0.80% | 52,021 | -62.33% |
| Carpenter Technology Corp | $13,767,252 | 0.79% | 22,319 | New |
| Fervo Energy Co | $13,556,640 | 0.78% | 463,792 | New |
| Almonty Inds Inc | $13,555,072 | 0.78% | 818,543 | +492.42% |
| PBF Energy Inc | $13,422,255 | 0.77% | 294,865 | +43.28% |
| Kodiak Gas Svcs Inc | $12,901,850 | 0.74% | 171,727 | -32.32% |
Changes since Mar 31, 2026
Comparing the share counts in the two quarter-end filings: 44 new positions, 58 sold out, 35 increased, 74 reduced and 2 unchanged.
New positions
| Stock | Value | Shares |
|---|---|---|
| United Rentals Inc | $33,751,059 | 29,792 |
| Johnson Controls Internation | $29,753,548 | 203,638 |
| Consolidated Edison Inc | $23,549,587 | 212,868 |
| Innio NV | $18,985,740 | 480,044 |
| Carrier Global Corporation | $17,443,950 | 237,818 |
| Applied Aerospace & Defense | $16,580,719 | 727,863 |
| Carpenter Technology Corp | $13,767,252 | 22,319 |
| Fervo Energy Co | $13,556,640 | 463,792 |
| Constellation Energy Corp | $12,082,704 | 48,648 |
| Hexcel Corp New | $10,268,557 | 102,624 |
| Ingersoll Rand Inc | $9,017,752 | 109,986 |
| Littelfuse Inc | $7,369,516 | 16,185 |
| Atkore Inc | $7,193,384 | 94,600 |
| X-energy Inc | $6,998,795 | 381,198 |
| Shoals Technologies Group In | $5,621,121 | 567,790 |
| Conocophillips | $5,330,029 | 51,270 |
| Antero Midstream Corp | $5,288,238 | 232,450 |
| Transdigm Group Inc | $4,997,814 | 3,752 |
| Erock Inc | $4,811,172 | 331,805 |
| Magnolia Oil & Gas Corp | $4,799,243 | 187,617 |
Sold out
| Stock | Value at Mar 31, 2026 | Shares held then |
|---|---|---|
| Sable Offshore Corp | $16,382,239 | 991,661 |
| Hennessy Cap Invt Corp Vii | $15,029,038 | 1,452,081 |
| Eqt Corp | $9,741,311 | 153,069 |
| Regal Rexnord Corporation | $8,965,447 | 47,877 |
| Diamondback Energy Inc | $8,757,745 | 44,278 |
| Curtiss Wright Corp | $7,863,530 | 11,545 |
| HF Sinclair Corp | $7,108,217 | 113,932 |
| Par Pac Holdings Inc | $7,106,633 | 113,452 |
| Emerson Elec Co | $7,046,780 | 53,784 |
| Mueller Inds Inc | $6,981,065 | 63,006 |
| Kinder Morgan Inc Del | $6,917,474 | 206,307 |
| Viper Energy Inc | $6,884,270 | 146,505 |
| C H Robinson Worldwide In | $6,870,482 | 41,371 |
| Williams Cos Inc | $6,842,048 | 94,010 |
| Helmerich & Payne Inc | $6,765,281 | 187,768 |
| Clearway Energy Inc | $5,651,631 | 143,844 |
| Lyondellbasell Industries NV | $5,299,317 | 65,781 |
| California Res Corp | $5,297,753 | 76,535 |
| BP PLC | $5,246,704 | 111,632 |
| Cenovus Energy Inc | $5,214,233 | 196,541 |
Largest increases
| Stock | Change in shares | Change | Value now | Shares now |
|---|---|---|---|---|
| Tenaris S A | +472,574 | +540.91% | $31,071,126 | 559,941 |
| Sterling Infrastructure Inc | +30,394 | +271.21% | $34,918,215 | 41,601 |
| Nvent Elec PLC | +133,523 | +335.43% | $29,398,332 | 173,329 |
| Occidental Pete Corp | +370,288 | +149.46% | $30,018,203 | 618,040 |
| CSX Corp | +365,387 | +284.05% | $23,480,818 | 494,021 |
| Southwest Gas Hldgs Inc | +189,912 | +327.98% | $21,976,323 | 247,816 |
| BKV Corp | +598,206 | +80.23% | $36,766,094 | 1,343,790 |
| Propetro Hldg Corp | +908,619 | +177.31% | $20,378,216 | 1,421,075 |
| Solv Energy Inc | +360,980 | +73.22% | $29,077,338 | 853,960 |
| Alliant Energy Corp | +160,394 | +44.06% | $40,011,130 | 524,461 |
| Almonty Inds Inc | +680,374 | +492.42% | $13,555,072 | 818,543 |
| Nisource Inc | +203,014 | +92.74% | $20,062,676 | 421,928 |
| Nextpower Inc | +80,947 | +35.17% | $37,066,718 | 311,119 |
| Vistra Corp | +58,009 | +177.18% | $14,395,514 | 90,749 |
| Ameren Corp | +78,566 | +25.22% | $44,100,973 | 390,136 |
| TC Energy Corp | +132,931 | +170.34% | $13,985,268 | 210,971 |
| Duke Energy Corp New | +38,558 | +22.96% | $26,137,124 | 206,487 |
| Tamboran Res Corp | +129,403 | +86.41% | $9,075,557 | 279,162 |
| Ecopetrol S A | +286,939 | +62.35% | $10,639,288 | 747,141 |
| PBF Energy Inc | +89,062 | +43.28% | $13,422,255 | 294,865 |
Largest reductions
| Stock | Change in shares | Change | Value now | Shares now |
|---|---|---|---|---|
| Entergy Corp New | -355,330 | -51.31% | $38,731,137 | 337,203 |
| Ge Vernova Inc | -28,345 | -59.79% | $22,395,181 | 19,062 |
| Woodward Inc | -60,503 | -59.00% | $17,891,028 | 42,053 |
| Centerpoint Energy Inc | -559,289 | -51.20% | $23,477,856 | 533,103 |
| Modine MFG Co | -86,083 | -62.33% | $13,890,648 | 52,021 |
| PPL Corp | -483,001 | -48.38% | $18,734,063 | 515,380 |
| Targa Res Corp | -63,827 | -54.15% | $14,488,677 | 54,034 |
| CNX Res Corp | -482,465 | -42.65% | $22,011,341 | 648,728 |
| Lennox Intl Inc | -27,305 | -59.34% | $10,720,467 | 18,711 |
| Public SVC Enterprise Group | -190,859 | -51.02% | $14,872,732 | 183,252 |
| Ati Inc | -74,420 | -40.16% | $21,856,813 | 110,892 |
| American Elec PWR Co Inc | -106,996 | -45.94% | $17,227,526 | 125,923 |
| Entegris Inc | -79,725 | -66.75% | $7,144,039 | 39,720 |
| Borgwarner Inc | -205,580 | -57.84% | $9,948,314 | 149,824 |
| Mastec Inc | -32,719 | -60.14% | $9,023,509 | 21,688 |
| Caterpillar Inc | -12,758 | -45.71% | $16,133,235 | 15,150 |
| Sempra | -140,961 | -48.00% | $14,158,393 | 152,717 |
| Apa Corporation | -359,779 | -36.51% | $20,381,622 | 625,779 |
| Ovintiv Inc | -217,187 | -44.58% | $14,218,132 | 270,050 |
| Eversource Energy | -153,971 | -51.94% | $10,295,367 | 142,457 |
Each list shows up to 20 positions, largest first by dollar amount. Changes compare two quarter-end snapshots, with the earlier share count adjusted for stock splits AltMountain detected. They do not show when, or at what price, anything was bought or sold.
From public Form 13F filings, not verified. Form 13F is filed up to 45 days after the quarter ends, so positions may have changed. It lists only certain long positions in U.S.-listed stocks and exchange-traded funds; options are not shown here, and short positions, most bonds, cash, non-U.S. securities and private investments are not reported at all, so a holding may be one side of a hedge. A filing covers the manager as a whole, not any single fund, and filings contain errors. This is not investment advice or a recommendation to buy or sell any security. Disclosures
Hedge funds filing Form D (5)
Matched to this firm by the fund names and related persons in each Form D. The list may be incomplete.
Private funds reported on Form ADV (1)
As reported in the adviser's Form ADV filed Mar 28, 2024. Funds also listed from Form D are shown above.
Fund vehicles: feeder funds and single-deal vehicles (1)
Feeder funds invest through a master fund; single-deal vehicles (SPVs, co-investments, series) hold one investment.
From SEC filings. Firm data comes from the SEC's Form ADV data as of Oct 2, 2026; performance estimates come from Form 13F. AltMountain has not verified this information, and it is not an offer, solicitation or recommendation. Full disclosures