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 | No change | 22,096,068 | 40,877 | 7.88% | 7.27% | 1 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | No change | 4,575,000 | 8,463 | 0.01% | 0.02% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| BlackRock, Inc. | History | Added to | 1,473,044 | 2,725 | 0.0% | 0.0% | 3 | +20,581 | 1.42% | Q4 2025 | Feb 12, 2026 |
| VANGUARD GROUP INC | History | Added to | 1,022,411 | 1,891 | 0.0% | 0.0% | 4 | +76,781 | 8.12% | Q4 2025 | Jan 29, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 699,678 | 1,294 | 0.0% | 0.0% | 5 | -236,736 | -25.28% | Q4 2025 | Feb 12, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 585,719 | 1,083 | 0.0% | 0.0% | 6 | +6,614 | 1.14% | Q4 2025 | Feb 09, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Added to | 409,991 | 758 | 0.02% | 0.02% | 7 | +20,027 | 5.14% | Q4 2025 | Feb 17, 2026 |
| STATE STREET CORP | History | Added to | 408,484 | 755 | 0.0% | 0.0% | 8 | +1,568 | 0.39% | Q4 2025 | Feb 13, 2026 |
| MORGAN STANLEY | History | Added to | 292,698 | 541 | 0.0% | 0.0% | 9 | +147,398 | 101.44% | Q4 2025 | Feb 13, 2026 |
| Russell Investments Group, Ltd. | History | Added to | 247,491 | 457 | 0.0% | 0.0% | 10 | +245,400 | 11736.01% | Q4 2025 | Feb 17, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 220,111 | 407 | 0.0% | 0.0% | 11 | -71,304 | -24.47% | Q4 2025 | Feb 17, 2026 |
| Empowered Funds, LLC | History | Added to | 218,991 | 405 | 0.01% | 0.0% | 12 | +20,027 | 10.07% | Q4 2025 | Feb 18, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 186,072 | 344 | 0.0% | 0.0% | 13 | +52,100 | 38.89% | Q4 2025 | Feb 12, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 167,845 | 310 | 0.0% | 0.0% | 14 | -24,624 | -12.79% | Q4 2025 | Feb 17, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 165,984 | 307 | 0.0% | 0.0% | 15 | -16,797 | -9.19% | Q4 2025 | Feb 11, 2026 |
| Bank of New York Mellon Corp | History | Reduced | 132,674 | 245 | 0.0% | 0.0% | 16 | -1,081 | -0.81% | Q4 2025 | Feb 10, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Added to | 106,892 | 195 | 0.0% | 0.0% | 18 | +66,650 | 165.62% | Q4 2025 | Feb 10, 2026 |
| STIFEL FINANCIAL CORP | History | Reduced | 105,572 | 195 | 0.0% | 0.0% | 17 | -297 | -0.28% | Q4 2025 | Feb 13, 2026 |
| Corient Private Wealth LLC | History | New | 97,902 | 181 | 0.0% | — | 19 | +97,902 | New | Q4 2025 | Mar 09, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 89,944 | 166 | 0.0% | 0.0% | 20 | +37,863 | 72.7% | Q4 2025 | Mar 25, 2026 |
| OSAIC HOLDINGS, INC. | History | Added to | 79,686 | 147 | 0.0% | 0.0% | 21 | +48,583 | 156.2% | Q4 2025 | Feb 17, 2026 |
| Squarepoint Ops LLC | History | New | 76,164 | 140 | 0.0% | — | 22 | +76,164 | New | Q4 2025 | Feb 13, 2026 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | History | New | 72,619 | 134 | 0.01% | — | 23 | +72,619 | New | Q4 2025 | Feb 13, 2026 |
| FRANKLIN RESOURCES INC | History | Added to | 72,088 | 133 | 0.0% | 0.0% | 24 | +56,297 | 356.51% | Q4 2025 | Feb 11, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | No change | 70,674 | 130 | 0.0% | 0.0% | 25 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Quadrature Capital Ltd | History | New | 65,875 | 121 | 0.0% | — | 26 | +65,875 | New | Q4 2025 | Feb 17, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | No change | 56,398 | 104 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| XTX Topco Ltd | History | Added to | 45,235 | 83 | 0.0% | 0.0% | 28 | +20,153 | 80.35% | Q4 2025 | Feb 17, 2026 |
| Centiva Capital, LP | History | New | 41,317 | 76 | 0.0% | — | 29 | +41,317 | New | Q4 2025 | Feb 13, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 39,652 | 73 | 0.0% | 0.0% | 30 | -12,151 | -23.46% | Q4 2025 | Feb 12, 2026 |
| BARCLAYS PLC | History | Reduced | 38,064 | 70 | 0.0% | 0.0% | 31 | -21,205 | -35.78% | Q4 2025 | Feb 13, 2026 |
| Nuveen, LLC | History | No change | 36,843 | 68 | 0.0% | 0.0% | 32 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| RHUMBLINE ADVISERS | History | Reduced | 32,643 | 60 | 0.0% | 0.0% | 33 | -2,138 | -6.15% | Q4 2025 | Feb 13, 2026 |
| MARSHALL WACE, LLP | History | Reduced | 30,801 | 56 | 0.0% | 0.0% | 34 | -13,716 | -30.81% | Q4 2025 | Feb 13, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 27,501 | 50 | 0.0% | 0.0% | 35 | +8,598 | 45.48% | Q4 2025 | Feb 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 22,072 | 40 | 0.0% | 0.0% | 36 | +10,241 | 86.56% | Q4 2025 | Feb 17, 2026 |
| NewEdge Advisors, LLC | History | Reduced | 20,498 | 37 | 0.0% | 0.0% | 37 | -4,996 | -19.6% | Q4 2025 | Feb 18, 2026 |
| Virtu Financial LLC | History | Added to | 17,973 | 33 | 0.0% | 0.0% | 38 | +3,825 | 27.04% | Q4 2025 | Feb 23, 2026 |
| UBS Group AG | History | Reduced | 17,614 | 32 | 0.0% | 0.0% | 39 | -2,854 | -13.94% | Q4 2025 | Jan 29, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 17,014 | 31 | 0.0% | 0.0% | 40 | +1,544 | 9.98% | Q4 2025 | Feb 10, 2026 |
| Point72 Asset Management, L.P. | History | New | 14,925 | 27 | 0.0% | — | 41 | +14,925 | New | Q4 2025 | Feb 17, 2026 |
| STEINBERGANNA WEALTH MANAGEMENT | History | Reduced | 13,615 | 25 | 0.01% | 0.03% | 43 | -10,650 | -43.89% | Q4 2025 | Jan 26, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | No change | 13,385 | 25 | 0.0% | 0.0% | 42 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| VALUEWORKS LLC | History | Reduced | 12,775 | 23 | 0.01% | 1.36% | 44 | -2,025,430 | -99.37% | Q4 2025 | Feb 13, 2026 |
| Creative Planning | History | New | 12,106 | 22 | 0.0% | — | 45 | +12,106 | New | Q4 2025 | Feb 17, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Added to | 12,298 | 22 | 0.0% | 0.0% | 46 | +352 | 2.95% | Q4 2025 | Feb 17, 2026 |
| ALLIANCEBERNSTEIN L.P. | History | No change | 11,390 | 21 | 0.0% | 0.0% | 47 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| FMR LLC | History | Reduced | 11,106 | 20 | 0.0% | 0.0% | 48 | -1,540 | -12.18% | Q4 2025 | Feb 17, 2026 |
| AQR CAPITAL MANAGEMENT LLC | History | Reduced | 11,255 | 20 | 0.0% | 0.0% | 49 | -44 | -0.39% | Q4 2025 | Feb 17, 2026 |
| Archer Investment Corp | History | No change | 11,200 | 20 | 0.0% | 0.01% | 50 | 0 | 0.0% | Q4 2025 | Jan 30, 2026 |
| Invesco Ltd. | History | Reduced | 10,710 | 19 | 0.0% | 0.0% | 52 | -23 | -0.21% | Q4 2025 | Feb 19, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | No change | 10,696 | 19 | 0.0% | 0.0% | 51 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 10,264 | 18 | 0.0% | 0.0% | 53 | -82,514 | -88.94% | Q4 2025 | Feb 17, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | No change | 9,637 | 17 | 0.0% | 0.0% | 54 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 5,551 | 10 | 0.0% | 0.0% | 55 | +681 | 13.98% | Q4 2025 | Feb 17, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Reduced | 3,622 | 6 | 0.0% | 0.0% | 56 | -123 | -3.28% | Q4 2025 | Feb 06, 2026 |
| Legal & General Group Plc | History | No change | 2,179 | 4 | 0.0% | 0.0% | 57 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| Ameritas Investment Partners, Inc. | History | No change | 1,924 | 3 | 0.0% | 0.0% | 58 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| Sterling Capital Management LLC | History | No change | 1,674 | 3 | 0.0% | 0.0% | 59 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| ROYAL BANK OF CANADA | History | New | 1,100 | 2 | 0.0% | — | 60 | +1,100 | New | Q4 2025 | Feb 17, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Reduced | 1,487 | 2 | 0.0% | 0.0% | 61 | -275 | -15.61% | Q4 2025 | Feb 17, 2026 |
| CITIGROUP INC | History | Reduced | 549 | 1 | 0.0% | 0.0% | 62 | -178 | -24.48% | Q4 2025 | Feb 13, 2026 |
| AMALGAMATED BANK | History | Reduced | 762 | 1 | 0.0% | 0.0% | 63 | -23 | -2.93% | Q4 2025 | Feb 05, 2026 |
| CastleKnight Management LP | History | Closed out | 0 | 0 | — | 0.01% | — | -167,433 | -100.0% | Q3 2025 | Nov 14, 2025 |
| DEUTSCHE BANK AG\ | History | Closed out | 0 | 0 | — | 0.0% | — | -72,183 | -100.0% | Q3 2025 | Nov 13, 2025 |
| NBC SECURITIES, INC. | History | Closed out | 0 | 0 | — | 0.01% | — | -36,200 | -100.0% | Q3 2025 | Nov 14, 2025 |
| ROYCE & ASSOCIATES LP | History | Closed out | 0 | 0 | — | 0.0% | — | -17,954 | -100.0% | Q3 2025 | Nov 12, 2025 |
| HRT FINANCIAL LP | History | Closed out | 0 | 0 | — | 0.0% | — | -15,076 | -100.0% | Q3 2025 | Nov 14, 2025 |
| INTECH INVESTMENT MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -12,175 | -100.0% | Q3 2025 | Nov 12, 2025 |
| Union Bancaire Privee, UBP SA | History | Closed out | 0 | 0 | — | 0.0% | — | -4,230 | -100.0% | Q3 2025 | Oct 07, 2025 |
| Advisory Services Network, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -500 | -100.0% | Q3 2025 | Nov 18, 2025 |
| NISA INVESTMENT ADVISORS, LLC | History | Closed out | 0 | 0 | — | — | — | -431 | -100.0% | Q3 2025 | Oct 23, 2025 |
| CWM, LLC | History | Reduced | 265 | 0 | — | 0.0% | — | -388 | -59.42% | Q4 2025 | Jan 26, 2026 |
| Westside Investment Management, Inc. | History | New | 187 | 0 | — | — | — | +187 | New | Q4 2025 | Jan 23, 2026 |
| Transamerica Financial Advisors, LLC | History | Reduced | 31 | 0 | — | — | — | -125 | -80.13% | Q4 2025 | Feb 13, 2026 |
| Arax Advisory Partners | History | Closed out | 0 | 0 | — | — | — | -70 | -100.0% | Q3 2025 | Nov 14, 2025 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | New | 28 | 0 | — | — | — | +28 | New | Q4 2025 | Feb 10, 2026 |
| Clearstead Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -11 | -100.0% | Q3 2025 | Nov 10, 2025 |
| EverSource Wealth Advisors, LLC | History | Added to | 8 | 0 | — | — | — | +4 | 100.0% | Q4 2025 | Feb 06, 2026 |
| True Wealth Design, LLC | History | Reduced | 4 | 0 | — | — | — | -4 | -50.0% | Q4 2025 | Jan 08, 2026 |
| IFP Advisors, Inc | History | Added to | 31 | 0 | — | — | — | +1 | 3.33% | Q4 2025 | Feb 06, 2026 |
| SBI Securities Co., Ltd. | History | No change | 120 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| Optiver Holding B.V. | History | No change | 328 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |