MAMMOTH ENERGY SVCS INC (TUSK)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
91
Reporting holders
$84.1M
Reported value
53.4%
Of shares outstanding
0.6%
Held as options
+5
Holder change
Institutions report 25,724,094 shares against 48,127,585 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| WEXFORD CAPITAL LP | $39.2M | 12,071,823 | 5.02% | 30q | -45.3%-$32.5M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $14.9M | 4,575,000 | 0.02% | 17q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $3.4M | 1,059,603 | 0.00% | 2q | +29.4%+$781.6K |
| Peapod Lane Capital LLC | $2.6M | 807,804 | 1.77% | 2q | +34.7%+$676.0K |
| DIMENSIONAL FUND ADVISORS LP | $2.2M | 691,667 | 0.00% | 31q | +0.8%+$17.8K |
| CITADEL ADVISORS LLC | $1.9M | 452,163 | 0.00% | 17q | +36.5%+$515.1K |
| JANE STREET GROUP, LLC | $1.6M | 506,662 | 0.00% | 11q | +2117.0%+$1.6M |
| BlackRock, Inc. | $1.3M | 407,976 | 0.00% | 8q | -72.0%-$3.4M |
| MARSHALL WACE, LLP | $1.3M | 395,583 | 0.00% | new | NEW |
| Johns Hopkins University | $1.3M | 387,359 | 0.08% | new | NEW |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.1M | 332,313 | 0.02% | 31q | HELD |
| Russell Investments Group, Ltd. | $1.1M | 329,821 | 0.00% | 4q | +384.8%+$850.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $995.7K | 306,028 | 0.00% | 31q | -49.9%-$992.1K |
| RENAISSANCE TECHNOLOGIES LLC | $949.9K | 292,280 | 0.00% | 25q | +26.0%+$196.0K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $942.8K | 290,096 | 0.00% | new | NEW |
| Empowered Funds, LLC | $784.3K | 241,313 | 0.00% | 13q | HELD |
| AQR CAPITAL MANAGEMENT LLC | $577.9K | 177,824 | 0.00% | 4q | +166.5%+$361.1K |
| VANGUARD FIDUCIARY TRUST CO | $525.8K | 161,791 | 0.00% | 2q | -4.9%-$27.1K |
| Round Rock Advisors LLC | $496.7K | 152,841 | 0.06% | new | NEW |
| MORGAN STANLEY | $434.1K | 133,560 | 0.00% | 21q | -12.5%-$62.3K |
| Centiva Capital, LP | $425.3K | 130,870 | 0.00% | 3q | +17.8%+$64.2K |
| MILLENNIUM MANAGEMENT LLC | $403.6K | 124,186 | 0.00% | new | NEW |
| Marquette Asset Management, LLC | $356.9K | 109,826 | 0.05% | new | NEW |
| STIFEL FINANCIAL CORP | $343.1K | 105,572 | 0.00% | 26q | HELD |
| STATE STREET CORP | $331.1K | 101,864 | 0.00% | 22q | -75.9%-$1.0M |
| BANK OF AMERICA CORP /DE/ | $315.4K | 97,046 | 0.00% | 25q | +279.2%+$232.2K |
| BNP PARIBAS FINANCIAL MARKETS | $302.1K | 92,964 | 0.00% | 31q | +455.1%+$247.7K |
| Point72 Asset Management, L.P. | $234.3K | 72,091 | 0.00% | new | NEW |
| Boston Partners | $224.0K | 68,935 | 0.00% | 2q | -55.3%-$277.7K |
| Aster Capital Management (DIFC) Ltd | $219.6K | 67,570 | 0.02% | new | NEW |
| Bank of New York Mellon Corp | $201.5K | 62,007 | 0.00% | 31q | -53.2%-$229.2K |
| Qube Research & Technologies Ltd | $191.3K | 58,859 | 0.00% | new | NEW |
| TWO SIGMA INVESTMENTS, LP | $190.2K | 58,538 | 0.00% | new | NEW |
| NORTHERN TRUST CORP | $185.8K | 57,180 | 0.00% | 31q | -69.4%-$422.3K |
| GOLDMAN SACHS GROUP INC | $178.5K | 54,928 | 0.00% | 15q | -75.4%-$547.8K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $162.2K | 49,920 | 0.00% | 23q | +37.5%+$44.3K |
| XTX Topco Ltd | $160.1K | 49,261 | 0.00% | new | NEW |
| Walleye Capital LLC | $159.7K | 49,141 | 0.00% | new | NEW |
| WELLINGTON MANAGEMENT GROUP LLP | $154.3K | 47,486 | 0.00% | 8q | -30.6%-$68.0K |
| ALGERT GLOBAL LLC | $149.5K | 45,997 | 0.00% | new | NEW |
| Quadrature Capital Ltd | $143.0K | 44,015 | 0.00% | new | NEW |
| HSBC HOLDINGS PLC | $108.0K | 33,706 | 0.00% | new | NEW |
| UBS Group AG | $95.9K | 29,518 | 0.00% | 14q | +285.0%+$71.0K |
| Connor, Clark & Lunn Investment Management Ltd. | $92.9K | 28,581 | 0.00% | 2q | +97.0%+$45.7K |
| CAPTRUST FINANCIAL ADVISORS | $87.1K | 26,799 | 0.00% | new | NEW |
| BARCLAYS PLC | $83.0K | 25,553 | 0.00% | 22q | +357.9%+$64.9K |
| IEQ CAPITAL, LLC | $79.3K | 24,392 | 0.00% | new | NEW |
| Pathstone Holdings, LLC | $72.6K | 22,336 | 0.00% | new | NEW |
| Schonfeld Strategic Advisors LLC | $54.8K | 16,864 | 0.00% | 2q | -8.0%-$4.7K |
| RHUMBLINE ADVISERS | $54.0K | 16,609 | 0.00% | 13q | -49.5%-$52.8K |
| Archer Investment Corp | $53.3K | 16,400 | 0.01% | 18q | +46.4%+$16.9K |
| AXQ CAPITAL, LP | $45.2K | 13,903 | 0.00% | new | NEW |
| Tower Research Capital LLC (TRC) | $43.8K | 13,477 | 0.00% | 16q | +7.6%+$3.1K |
| Creative Planning | $43.3K | 13,317 | 0.00% | 3q | -21.4%-$11.8K |
| Mariner, LLC | $43.1K | 13,287 | 0.00% | 2q | -50.6%-$44.1K |
| FMR LLC | $40.7K | 12,531 | 0.00% | 18q | +3.2%+$1.3K |
| STEINBERGANNA WEALTH MANAGEMENT | $37.6K | 11,560 | 0.02% | 4q | -37.0%-$22.1K |
| JPMORGAN CHASE & CO | $36.0K | 12,385 | 0.00% | 13q | +20.5%+$6.1K |
| PRELUDE CAPITAL MANAGEMENT, LLC | $35.1K | 10,800 | 0.00% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $34.9K | 10,739 | 0.00% | 16q | -81.8%-$156.4K |
| Sixth Street Partners Management Company, L.P. | $34.9K | 10,739 | 0.00% | new | NEW |
| GROUP ONE TRADING LLC | $30.8K | 777 | 0.00% | 2q | HELD |
| Vanguard Global Advisers, LLC | $28.5K | 8,774 | 0.00% | 2q | HELD |
| MERCER GLOBAL ADVISORS INC /ADV | $25.1K | 7,730 | 0.00% | new | NEW |
| PNC Financial Services Group, Inc. | $23.5K | 7,217 | 0.00% | 9q | +26.2%+$4.9K |
| ROYAL BANK OF CANADA | $14.0K | 4,537 | 0.00% | new | NEW |
| SIMPLEX TRADING, LLC | $11.6K | 3,457 | 0.00% | 2q | -37.6%-$7.0K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $4.6K | 1,416 | 0.00% | 2q | HELD |
| Arax Advisory Partners | $2.7K | 843 | 0.00% | 2q | +4858.8%+$2.7K |
| Allworth Financial LP | $2.7K | 840 | 0.00% | 2q | +315.8%+$2.1K |
| Allianz SE | $2.6K | 800 | 0.00% | 2q | HELD |
| Integrated Wealth Concepts LLC | $1.7K | 524 | 0.00% | new | NEW |
| WELLS FARGO & COMPANY/MN | $975 | 300 | 0.00% | 15q | -98.4%-$60.6K |
| EverSource Wealth Advisors, LLC | $898 | 276 | 0.00% | 6q | +228.6% |
| ROTHSCHILD INVESTMENT LLC | $777 | 239 | 0.00% | 2q | +79.7% |
| Essential Partners LLC | $689 | 212 | 0.00% | 2q | +960.0% |
| MCGUIRE CAPITAL ADVISORS INC | $650 | 200 | 0.00% | new | NEW |
| Westside Investment Management, Inc. | $608 | 187 | 0.00% | 3q | HELD |
| OSAIC HOLDINGS, INC. | $487 | 150 | 0.00% | 26q | -99.8%-$234.6K |
| GSA CAPITAL PARTNERS LLP | $421 | 129,547 | 0.03% | 2q | +831.4% |
| ACADIAN ASSET MANAGEMENT LLC | $396 | 122,050 | 0.00% | 6q | -40.2% |
| Farther Finance Advisors, LLC | $343 | 107 | 0.00% | 2q | +664.3% |
| Basecamp Wealth Advisors LLC | $257 | 79 | 0.00% | new | FIRST |
| FNY Investment Advisers, LLC | $248 | 76,481 | 0.09% | new | NEW |
| True Wealth Design, LLC | $121 | 37 | 0.00% | 6q | +48.0% |
| Transamerica Financial Advisors, LLC | $100 | 31 | 0.00% | 4q | HELD |
| HRT FINANCIAL LP | $99 | 30,632 | 0.00% | new | NEW |
| SJS Investment Consulting Inc. | $98 | 30 | 0.00% | 2q | +76.5% |
| IFP Advisors, Inc | $88 | 27 | 0.00% | 4q | +440.0% |
| Wealth Enhancement Trust Services, Inc. | $55 | 17 | 0.00% | new | NEW |
| Virtu Financial LLC | $42 | 12,793 | 0.00% | new | NEW |
| Caitong International Asset Management Co., Ltd | $32 | 10 | 0.00% | 2q | +400.0% |
| JPL Wealth Management, LLC | $30 | 9 | 0.00% | 2q | HELD |
| Fortitude Family Office, LLC | $23 | 7 | 0.00% | new | NEW |
| CITIGROUP INC | $3 | 1 | 0.00% | 15q | -99.9%-$3.4K |
| SBI Securities Co., Ltd. | $3 | 1 | 0.00% | 7q | -99.0% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 91 | $84.1M | 25,724,094 | 30 | 30 | 22 | 0.6% |
| Q1 2026 | 86 | $85.5M | 34,841,813 | 28 | 22 | 20 | 0.1% |
| Q4 2025 | 69 | $63.5M | 34,326,925 | 9 | 19 | 21 | 0.0% |
| Q3 2025 | 73 | $82.9M | 36,159,896 | 14 | 15 | 26 | 0.1% |
| Q2 2025 | 61 | $102.1M | 36,382,703 | 6 | 27 | 14 | 0.2% |
| Q1 2025 | 60 | $76.0M | 37,195,065 | 6 | 16 | 20 | 0.2% |
| Q4 2024 | 64 | $112.7M | 37,506,013 | 7 | 23 | 13 | 0.1% |
| Q3 2024 | 59 | $138.9M | 33,883,765 | 7 | 24 | 11 | 0.2% |
| Q2 2024 | 60 | $115.0M | 35,035,932 | 3 | 15 | 23 | 0.1% |
| Q1 2024 | 60 | $128.7M | 35,243,055 | 4 | 17 | 25 | 0.3% |
| Q4 2023 | 61 | $158.2M | 35,306,749 | 5 | 24 | 16 | 0.5% |
| Q3 2023 | 68 | $163.9M | 35,226,673 | 9 | 21 | 19 | 0.3% |
| Q2 2023 | 67 | $166.6M | 34,323,099 | 16 | 20 | 14 | 0.5% |
| Q1 2023 | 65 | $140.1M | 33,073,120 | 10 | 30 | 14 | 0.5% |
| Q4 2022 | 64 | $276.3M | 31,840,126 | 24 | 20 | 8 | 0.4% |
| Q3 2022 | 54 | $126.3M | 36,969,251 | 9 | 16 | 11 | 0.2% |
| Q2 2022 | 48 | $27.9M | 12,646,544 | 7 | 9 | 18 | 0.4% |
| Q1 2022 | 47 | $21.5M | 10,077,509 | 15 | 11 | 9 | 0.1% |
| Q4 2021 | 43 | $14.8M | 8,093,307 | 4 | 8 | 15 | 0.4% |
| Q3 2021 | 46 | $22.2M | 7,602,078 | 2 | 12 | 17 | 0.4% |
| Q2 2021 | 51 | $134.1M | 29,197,977 | 8 | 14 | 13 | 0.1% |
| Q1 2021 | 54 | $154.4M | 28,821,516 | 16 | 17 | 11 | 0.7% |
| Q4 2020 | 44 | $128.7M | 28,895,014 | 19 | 10 | 8 | 0.1% |
| Q3 2020 | 36 | $45.7M | 28,573,867 | 3 | 6 | 13 | 0.0% |
| Q2 2020 | 47 | $34.9M | 29,598,358 | 15 | 10 | 16 | 0.0% |
| Q1 2020 | 60 | $23.1M | 30,917,911 | 9 | 8 | 23 | 0.0% |
| Q4 2019 | 70 | $72.4M | 32,878,660 | 8 | 21 | 30 | 0.1% |
| Q3 2019 | 87 | $85.9M | 34,550,649 | 10 | 37 | 28 | 0.3% |
| Q2 2019 | 100 | $252.5M | 36,288,222 | 16 | 40 | 32 | 1.1% |
| Q1 2019 | 136 | $621.6M | 37,225,915 | 27 | 40 | 45 | 0.3% |
| Q4 2018 | 131 | $662.3M | 36,591,074 | 2 | 2 | 3 | 0.6% |