MAMMOTH ENERGY SERVICES, INC. - TUSK
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| WEXFORD CAPITAL LP | History | Reduced | 12,071,823 | 39,233 | 5.02% | 7.83% | 1 | -9,996,389 | -45.3% | Q2 2026 | Aug 14, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | No change | 4,575,000 | 14,868 | 0.02% | 0.02% | 2 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | Added to | 1,059,603 | 3,443 | 0.0% | 0.0% | 3 | +240,483 | 29.36% | Q2 2026 | Aug 13, 2026 |
| Peapod Lane Capital LLC | History | Added to | 807,804 | 2,625 | 1.77% | 1.24% | 4 | +207,999 | 34.68% | Q2 2026 | Jul 27, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Added to | 691,667 | 2,247 | 0.0% | 0.0% | 5 | +5,468 | 0.8% | Q2 2026 | Aug 11, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 593,263 | 1,928 | 0.0% | 0.0% | 6 | +251,296 | 73.49% | Q2 2026 | Sep 02, 2026 |
| JANE STREET GROUP, LLC | History | Added to | 506,662 | 1,646 | 0.0% | 0.0% | 7 | +471,908 | 1357.85% | Q2 2026 | Aug 14, 2026 |
| BlackRock, Inc. | History | Reduced | 407,976 | 1,325 | 0.0% | 0.0% | 8 | -1,046,863 | -71.96% | Q2 2026 | Aug 07, 2026 |
| MARSHALL WACE, LLP | History | New | 395,583 | 1,285 | 0.0% | — | 9 | +395,583 | New | Q2 2026 | Aug 13, 2026 |
| Johns Hopkins University | History | New | 387,359 | 1,258 | 0.08% | — | 10 | +387,359 | New | Q2 2026 | Aug 14, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | No change | 332,313 | 1,080 | 0.02% | 0.02% | 11 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Russell Investments Group, Ltd. | History | Added to | 329,821 | 1,071 | 0.0% | 0.0% | 12 | +261,791 | 384.82% | Q2 2026 | Aug 06, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 306,028 | 995 | 0.0% | 0.0% | 13 | -304,898 | -49.91% | Q2 2026 | Aug 12, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 292,280 | 949 | 0.0% | 0.0% | 14 | +60,308 | 26.0% | Q2 2026 | Aug 13, 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | History | New | 290,096 | 942 | 0.0% | — | 15 | +290,096 | New | Q2 2026 | Aug 13, 2026 |
| Empowered Funds, LLC | History | No change | 241,313 | 784 | 0.0% | 0.0% | 16 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| AQR CAPITAL MANAGEMENT LLC | History | Added to | 177,824 | 577 | 0.0% | 0.0% | 17 | +111,093 | 166.48% | Q2 2026 | Aug 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | Reduced | 161,791 | 525 | 0.0% | 0.0% | 18 | -8,340 | -4.9% | Q2 2026 | Aug 13, 2026 |
| Round Rock Advisors LLC | History | New | 152,841 | 496 | 0.06% | — | 19 | +152,841 | New | Q2 2026 | Aug 12, 2026 |
| MORGAN STANLEY | History | Reduced | 133,560 | 434 | 0.0% | 0.0% | 20 | -19,163 | -12.55% | Q2 2026 | Aug 13, 2026 |
| Centiva Capital, LP | History | Added to | 130,870 | 425 | 0.0% | 0.0% | 21 | +19,762 | 17.79% | Q2 2026 | Aug 13, 2026 |
| GSA CAPITAL PARTNERS LLP | History | Added to | 129,547 | 421 | 0.03% | 0.0% | 22 | +115,638 | 831.39% | Q2 2026 | Aug 06, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | New | 124,186 | 403 | 0.0% | — | 23 | +124,186 | New | Q2 2026 | Aug 14, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 122,050 | 396 | 0.0% | 0.0% | 24 | -82,055 | -40.2% | Q2 2026 | Aug 13, 2026 |
| Marquette Asset Management, LLC | History | New | 109,826 | 356 | 0.05% | — | 25 | +109,826 | New | Q2 2026 | Jul 09, 2026 |
| STIFEL FINANCIAL CORP | History | No change | 105,572 | 343 | 0.0% | 0.0% | 26 | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |
| STATE STREET CORP | History | Reduced | 101,864 | 331 | 0.0% | 0.0% | 27 | -320,058 | -75.86% | Q2 2026 | Sep 22, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 97,046 | 315 | 0.0% | 0.0% | 28 | +71,457 | 279.25% | Q2 2026 | Aug 14, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 92,964 | 302 | 0.0% | 0.0% | 29 | +76,217 | 455.11% | Q2 2026 | Aug 13, 2026 |
| FNY Investment Advisers, LLC | History | New | 76,481 | 248 | 0.09% | — | 30 | +76,481 | New | Q2 2026 | Jul 08, 2026 |
| Point72 Asset Management, L.P. | History | New | 72,091 | 234 | 0.0% | — | 31 | +72,091 | New | Q2 2026 | Aug 14, 2026 |
| Boston Partners | History | Reduced | 68,935 | 224 | 0.0% | 0.0% | 32 | -85,453 | -55.35% | Q2 2026 | Aug 04, 2026 |
| Aster Capital Management (DIFC) Ltd | History | New | 67,570 | 219 | 0.05% | — | 33 | +67,570 | New | Q2 2026 | Aug 14, 2026 |
| Bank of New York Mellon Corp | History | Reduced | 62,007 | 201 | 0.0% | 0.0% | 34 | -70,532 | -53.22% | Q2 2026 | Aug 06, 2026 |
| Qube Research & Technologies Ltd | History | New | 58,859 | 191 | 0.0% | — | 35 | +58,859 | New | Q2 2026 | Aug 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | New | 58,538 | 190 | 0.0% | — | 36 | +58,538 | New | Q2 2026 | Aug 14, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 57,180 | 185 | 0.0% | 0.0% | 37 | -129,948 | -69.44% | Q2 2026 | Aug 13, 2026 |
| GOLDMAN SACHS GROUP INC | History | Reduced | 54,928 | 178 | 0.0% | 0.0% | 38 | -168,561 | -75.42% | Q2 2026 | Aug 14, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 49,920 | 162 | 0.0% | 0.0% | 39 | +13,621 | 37.52% | Q2 2026 | Aug 14, 2026 |
| XTX Topco Ltd | History | New | 49,261 | 160 | 0.0% | — | 40 | +49,261 | New | Q2 2026 | Aug 14, 2026 |
| Walleye Capital LLC | History | New | 49,141 | 159 | 0.0% | — | 41 | +49,141 | New | Q2 2026 | Aug 03, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | Reduced | 47,486 | 154 | 0.0% | 0.0% | 42 | -20,929 | -30.59% | Q2 2026 | Aug 14, 2026 |
| ALGERT GLOBAL LLC | History | New | 45,997 | 149 | 0.0% | — | 43 | +45,997 | New | Q2 2026 | Aug 13, 2026 |
| Quadrature Capital Ltd | History | New | 44,015 | 143 | 0.0% | — | 44 | +44,015 | New | Q2 2026 | Aug 06, 2026 |
| HSBC HOLDINGS PLC | History | New | 33,706 | 108 | 0.0% | — | 45 | +33,706 | New | Q2 2026 | Aug 14, 2026 |
| HRT FINANCIAL LP | History | New | 30,632 | 99 | 0.0% | — | 46 | +30,632 | New | Q2 2026 | Aug 14, 2026 |
| UBS Group AG | History | Added to | 29,518 | 95 | 0.0% | 0.0% | 47 | +21,851 | 285.0% | Q2 2026 | Aug 13, 2026 |
| Connor, Clark & Lunn Investment Management Ltd. | History | Added to | 28,581 | 92 | 0.0% | 0.0% | 48 | +14,071 | 96.97% | Q2 2026 | Aug 12, 2026 |
| CAPTRUST FINANCIAL ADVISORS | History | New | 26,799 | 87 | 0.0% | — | 49 | +26,799 | New | Q2 2026 | Aug 13, 2026 |
| BARCLAYS PLC | History | Added to | 25,553 | 83 | 0.0% | 0.0% | 50 | +19,972 | 357.86% | Q2 2026 | Aug 14, 2026 |
| IEQ CAPITAL, LLC | History | New | 24,392 | 79 | 0.0% | — | 51 | +24,392 | New | Q2 2026 | Aug 11, 2026 |
| Pathstone Holdings, LLC | History | New | 22,336 | 72 | 0.0% | — | 52 | +22,336 | New | Q2 2026 | Aug 13, 2026 |
| Schonfeld Strategic Advisors LLC | History | Reduced | 16,864 | 54 | 0.0% | 0.0% | 53 | -1,461 | -7.97% | Q2 2026 | Aug 14, 2026 |
| RHUMBLINE ADVISERS | History | Reduced | 16,609 | 53 | 0.0% | 0.0% | 54 | -16,254 | -49.46% | Q2 2026 | Aug 11, 2026 |
| AXQ CAPITAL, LP | History | New | 13,903 | 45 | 0.0% | — | 55 | +13,903 | New | Q2 2026 | Aug 06, 2026 |
| Mariner, LLC | History | Reduced | 13,287 | 43 | 0.0% | 0.0% | 56 | -13,586 | -50.56% | Q2 2026 | Aug 13, 2026 |
| Creative Planning | History | Reduced | 13,317 | 43 | 0.0% | 0.0% | 58 | -3,633 | -21.43% | Q2 2026 | Aug 13, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 13,477 | 43 | 0.0% | 0.0% | 57 | +955 | 7.63% | Q2 2026 | Aug 11, 2026 |
| Virtu Financial LLC | History | New | 12,793 | 42 | 0.0% | — | 59 | +12,793 | New | Q2 2026 | Aug 13, 2026 |
| FMR LLC | History | Added to | 12,531 | 40 | 0.0% | 0.0% | 60 | +389 | 3.2% | Q2 2026 | Aug 13, 2026 |
| STEINBERGANNA WEALTH MANAGEMENT | History | Reduced | 11,560 | 37 | 0.02% | 0.02% | 61 | -6,800 | -37.04% | Q2 2026 | Aug 04, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 12,385 | 36 | 0.0% | 0.0% | 62 | +2,110 | 20.54% | Q2 2026 | Aug 12, 2026 |
| PRELUDE CAPITAL MANAGEMENT, LLC | History | New | 10,800 | 35 | 0.0% | — | 63 | +10,800 | New | Q2 2026 | Aug 14, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 10,739 | 34 | 0.0% | 0.0% | 64 | -48,122 | -81.76% | Q2 2026 | Aug 14, 2026 |
| Vanguard Global Advisers, LLC | History | No change | 8,774 | 28 | 0.0% | 0.0% | 65 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Archer Investment Corp | History | Reduced | 8,200 | 26 | 0.01% | 0.01% | 66 | -3,000 | -26.79% | Q2 2026 | Aug 03, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Added to | 7,217 | 23 | 0.0% | 0.0% | 67 | +1,497 | 26.17% | Q2 2026 | Aug 07, 2026 |
| ROYAL BANK OF CANADA | History | Added to | 4,537 | 14 | 0.0% | — | 68 | +4,536 | 453600.0% | Q2 2026 | Aug 14, 2026 |
| CWM, LLC | History | No change | 5,793 | 14 | 0.0% | 0.0% | 69 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 3,457 | 11 | 0.0% | 0.0% | 70 | -2,081 | -37.58% | Q2 2026 | Aug 12, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | No change | 1,416 | 4 | 0.0% | 0.0% | 71 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Arax Advisory Partners | History | Added to | 843 | 2 | 0.0% | — | 74 | +826 | 4858.82% | Q2 2026 | Aug 10, 2026 |
| GROUP ONE TRADING LLC | History | New | 777 | 2 | 0.0% | — | 75 | +777 | New | Q2 2026 | Aug 13, 2026 |
| Allworth Financial LP | History | Added to | 840 | 2 | 0.0% | — | 73 | +638 | 315.84% | Q2 2026 | Aug 11, 2026 |
| ALLIANZ SE | History | No change | 800 | 2 | 0.0% | 0.0% | 72 | 0 | 0.0% | Q2 2026 | Aug 10, 2026 |
| LOS ANGELES CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -163,259 | -100.0% | Q2 2026 | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -140,145 | -100.0% | Q2 2026 | Aug 13, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 150 | 0 | — | 0.0% | — | -72,269 | -99.79% | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -51,620 | -100.0% | Q2 2026 | Aug 14, 2026 |
| Nuveen, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -36,843 | -100.0% | Q2 2026 | Aug 11, 2026 |
| OCCUDO QUANTITATIVE STRATEGIES LP | History | Closed out | 0 | 0 | — | 0.0% | — | -29,336 | -100.0% | Q2 2026 | Aug 13, 2026 |
| LEVIN CAPITAL STRATEGIES, L.P. | History | Closed out | 0 | 0 | — | 0.0% | — | -25,000 | -100.0% | Q2 2026 | Jul 31, 2026 |
| Verdad Advisers, LP | History | Closed out | 0 | 0 | — | 0.06% | — | -22,729 | -100.0% | Q2 2026 | Aug 14, 2026 |
| Sanctuary Advisors, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -16,676 | -100.0% | Q2 2026 | Aug 13, 2026 |
| SEI INVESTMENTS CO | History | Closed out | 0 | 0 | — | 0.0% | — | -13,579 | -100.0% | Q2 2026 | Aug 14, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | Closed out | 0 | 0 | — | 0.0% | — | -13,385 | -100.0% | Q2 2026 | Aug 14, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Closed out | 0 | 0 | — | 0.0% | — | -12,570 | -100.0% | Q2 2026 | Aug 14, 2026 |
| ALLIANCEBERNSTEIN L.P. | History | Closed out | 0 | 0 | — | 0.0% | — | -10,950 | -100.0% | Q2 2026 | Aug 14, 2026 |
| VALUEWORKS LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -10,720 | -100.0% | Q2 2026 | Aug 14, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | Closed out | 0 | 0 | — | 0.0% | — | -10,696 | -100.0% | Q2 2026 | Jul 29, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | Closed out | 0 | 0 | — | 0.0% | — | -9,637 | -100.0% | Q2 2026 | Jul 23, 2026 |
| WELLS FARGO & COMPANY/MN | History | Reduced | 300 | 0 | — | 0.0% | — | -9,169 | -96.83% | Q2 2026 | Aug 14, 2026 |
| Legal & General Group Plc | History | Closed out | 0 | 0 | — | 0.0% | — | -2,179 | -100.0% | Q2 2026 | Aug 14, 2026 |
| Ameritas Investment Partners, Inc. | History | Closed out | 0 | 0 | — | 0.0% | — | -1,924 | -100.0% | Q2 2026 | Aug 13, 2026 |
| CITIGROUP INC | History | Reduced | 1 | 0 | — | 0.0% | — | -1,126 | -99.91% | Q2 2026 | Aug 03, 2026 |
| Sterling Capital Management LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -803 | -100.0% | Q2 2026 | Jul 28, 2026 |
| Advisory Services Network, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -500 | -100.0% | Q2 2026 | Aug 12, 2026 |
| MCGUIRE CAPITAL ADVISORS INC | History | New | 200 | 0 | — | — | — | +200 | New | Q2 2026 | Aug 14, 2026 |
| Optiver Holding B.V. | History | Closed out | 0 | 0 | — | — | — | -200 | -100.0% | Q2 2026 | Aug 12, 2026 |
| EverSource Wealth Advisors, LLC | History | Added to | 276 | 0 | — | — | — | +192 | 228.57% | Q2 2026 | Jul 24, 2026 |
| Essential Partners LLC | History | Added to | 212 | 0 | — | — | — | +192 | 960.0% | Q2 2026 | Aug 10, 2026 |
| MAI Capital Management | History | Closed out | 0 | 0 | — | — | — | -168 | -100.0% | Q2 2026 | Aug 14, 2026 |
| ROTHSCHILD INVESTMENT LLC | History | Added to | 239 | 0 | — | — | — | +106 | 79.7% | Q2 2026 | Aug 06, 2026 |
| SBI Securities Co., Ltd. | History | Reduced | 1 | 0 | — | — | — | -100 | -99.01% | Q2 2026 | Jul 22, 2026 |
| Farther Finance Advisors, LLC | History | Added to | 107 | 0 | — | — | — | +93 | 664.29% | Q2 2026 | Jul 17, 2026 |
| Root Financial Partners, LLC | History | Closed out | 0 | 0 | — | — | — | -32 | -100.0% | Q2 2026 | Jul 29, 2026 |
| IFP Advisors, Inc | History | Added to | 27 | 0 | — | — | — | +22 | 440.0% | Q2 2026 | Jul 20, 2026 |
| Basecamp Wealth Advisors LLC | History | Added to | 79 | 0 | — | — | — | +22 | 38.6% | Q2 2026 | Aug 14, 2026 |
| Wealth Enhancement Trust Services, Inc. | History | New | 17 | 0 | — | — | — | +17 | New | Q2 2026 | Jul 22, 2026 |
| Wealth Preservation Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -15 | -100.0% | Q2 2026 | Aug 14, 2026 |
| SJS Investment Consulting Inc. | History | Added to | 30 | 0 | — | — | — | +13 | 76.47% | Q2 2026 | Jul 22, 2026 |
| True Wealth Design, LLC | History | Added to | 37 | 0 | — | — | — | +12 | 48.0% | Q2 2026 | Jul 16, 2026 |
| Caitong International Asset Management Co., Ltd | History | Added to | 10 | 0 | — | — | — | +8 | 400.0% | Q2 2026 | Aug 04, 2026 |
| Fortitude Family Office, LLC | History | New | 7 | 0 | — | — | — | +7 | New | Q2 2026 | Jul 20, 2026 |
| Transamerica Financial Advisors, LLC | History | No change | 31 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Westside Investment Management, Inc. | History | No change | 187 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Jul 27, 2026 |
| JPL Wealth Management, LLC | History | No change | 9 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |