Mammoth Energy Services, Inc.
TUSK- Exchange
- Nasdaq
- Industry
- Oil & Gas Field Services, NEC
- SEC CIK
- 0001679268
In the last 90 days, Mammoth Energy Services, Inc. insiders filed 1 open-market purchase and 0 sales; 93 institutions reported holding it in 13F filings for Q2 2026, worth $84.7M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Mammoth Energy Services, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 90
- +19 vs. Q4 2025
- Shares held
- 35.1M
- +1.72M (+5.2%) vs. Q4 2025
- Total value
- $86.0M
- +$24.3M (+39.3%) vs. Q4 2025
- New holders
- 32
- 24 more added
- Sold out
- 13
- 23 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TUSK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 93 | $84.7M |
| Q1 2026 | 90 | $86.0M |
| Q4 2025 | 72 | $63.6M |
| Q3 2025 | 77 | $82.6M |
| Q2 2025 | 66 | $101.9M |
| Q1 2025 | 66 | $76.1M |
| Q4 2024 | 67 | $112.6M |
| Q3 2024 | 64 | $151.9M |
| Q2 2024 | 67 | $127.0M |
| Q1 2024 | 67 | $141.9M |
| Q4 2023 | 67 | $175.4M |
| Q3 2023 | 75 | $183.6M |
| Q2 2023 | 72 | $186.7M |
| Q1 2023 | 77 | $161.9M |
| Q4 2022 | 80 | $323.2M |
| Q3 2022 | 58 | $126.1M |
| Q2 2022 | 49 | $27.8M |
| Q1 2022 | 50 | $21.5M |
| Q4 2021 | 44 | $14.5M |
| Q3 2021 | 46 | $22.1M |
| Q2 2021 | 52 | $134.0M |
| Q1 2021 | 54 | $153.3M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Mammoth Energy Services, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wexford Capital LP | 22,068,212 | $54.1M | 8.91% | −27,856−0.1% | Reduced |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $11.2M | 0.02% | 00.0% | Unchanged |
| BlackRock, Inc. | 1,454,839 | $3.56M | 0.00% | −18,205−1.2% | Reduced |
| Vanguard Capital Management LLC | 819,120 | $2.01M | 0.00% | +819,120 | New |
| Dimensional Fund Advisors LP | 686,199 | $1.68M | 0.00% | −13,479−1.9% | Reduced |
| Peapod Lane Capital LLC | 599,805 | $1.51M | 1.24% | +599,805 | New |
| Geode Capital Management, LLC | 610,926 | $1.50M | 0.00% | +25,207+4.3% | Added |
| State Street Corp | 421,922 | $1.03M | 0.00% | +13,438+3.3% | Added |
| Bridgeway Capital Management, LLC | 332,313 | $814.2K | 0.02% | −77,678−18.9% | Reduced |
| Citadel Advisors LLC | 331,367 | $811.8K | 0.00% | +111,256+50.5% | Added |
| Empowered Funds, LLC | 241,313 | $591.2K | 0.00% | +22,322+10.2% | Added |
| Renaissance Technologies LLC | 231,972 | $568.3K | 0.00% | +45,900+24.7% | Added |
| Goldman Sachs Group Inc | 223,489 | $547.5K | 0.00% | +133,545+148.5% | Added |
| Acadian Asset Management LLC | 204,105 | $498.0K | 0.00% | +97,213+90.9% | Added |
| Northern Trust Corp | 187,128 | $458.5K | 0.00% | +19,283+11.5% | Added |
| Vanguard Fiduciary Trust Co | 170,131 | $416.8K | 0.00% | +170,131 | New |
| Los Angeles Capital Management LLC | 163,259 | $400.0K | 0.00% | +163,259 | New |
| Boston Partners | 154,388 | $378.3K | 0.00% | +154,388 | New |
| Morgan Stanley | 152,723 | $374.2K | 0.00% | −139,975−47.8% | Reduced |
| Vanguard Portfolio Management LLC | 140,145 | $343.4K | 0.00% | +140,145 | New |
| Bank of New York Mellon Corp | 132,539 | $324.7K | 0.00% | −135−0.1% | Reduced |
| Centiva Capital, LP | 111,108 | $272.2K | 0.01% | +69,791+168.9% | Added |
| Stifel Financial Corp | 105,572 | $258.7K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 72,419 | $177.4K | 0.00% | −7,267−9.1% | Reduced |
| Wellington Management Group LLP | 68,415 | $167.6K | 0.00% | +12,017+21.3% | Added |
| Russell Investments Group, Ltd. | 68,030 | $166.7K | 0.00% | −179,461−72.5% | Reduced |
| AQR Capital Management LLC | 66,731 | $163.5K | 0.00% | +55,476+492.9% | Added |
| Charles Schwab Investment Management Inc | 58,861 | $144.2K | 0.00% | −11,813−16.7% | Reduced |
| Squarepoint Ops LLC | 51,620 | $126.5K | 0.00% | −24,544−32.2% | Reduced |
| Nuveen, LLC | 36,843 | $90.3K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 36,299 | $88.9K | 0.00% | +26,035+253.7% | Added |
| Occudo Quantitative Strategies LP | 29,336 | $83.9K | 0.00% | +29,336 | New |
| Rhumbline Advisers | 32,863 | $80.5K | 0.00% | +220+0.7% | Added |
| Mariner, LLC | 26,873 | $65.8K | 0.00% | +26,873 | New |
| Bank of America Corp | 25,589 | $62.7K | 0.00% | +3,517+15.9% | Added |
| Levin Capital Strategies, L.P. | 25,000 | $61.3K | 0.00% | +25,000 | New |
| Jane Street Group, LLC | 22,854 | $56.0K | 0.00% | −16,798−42.4% | Reduced |
| Verdad Advisers, LP | 22,729 | $55.7K | 0.06% | +22,729 | New |
| Steinberganna Wealth Management | 18,360 | $45.0K | 0.02% | +4,745+34.9% | Added |
| Schonfeld Strategic Advisors LLC | 18,325 | $44.9K | 0.00% | +18,325 | New |
| Creative Planning | 16,950 | $41.5K | 0.00% | +4,844+40.0% | Added |
| BNP Paribas Arbitrage, SA | 16,747 | $41.0K | 0.00% | −267−1.6% | Reduced |
| Sanctuary Advisors, LLC | 16,676 | $40.9K | 0.00% | +16,676 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 14,510 | $35.5K | 0.00% | +14,510 | New |
| Gsa Capital Partners LLP | 13,909 | $34.0K | 0.00% | +13,909 | New |
| SEI Investments Co | 13,579 | $33.3K | 0.00% | +13,579 | New |
| Price T Rowe Associates Inc | 13,385 | $33.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 12,570 | $30.8K | 0.00% | +272+2.2% | Added |
| Tower Research Capital LLC (TRC) | 12,522 | $30.7K | 0.00% | +6,971+125.6% | Added |
| FMR LLC | 12,142 | $29.7K | 0.00% | +1,036+9.3% | Added |
| Archer Investment Corp | 11,200 | $27.4K | 0.01% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 10,275 | $26.9K | 0.00% | −155,709−93.8% | Reduced |
| Valueworks LLC | 10,720 | $26.3K | 0.01% | −2,055−16.1% | Reduced |
| New York State Common Retirement Fund | 10,696 | $26.2K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 9,637 | $23.6K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 9,469 | $23.2K | 0.00% | −18,032−65.6% | Reduced |
| Vanguard Global Advisers, LLC | 8,774 | $21.5K | 0.00% | +8,774 | New |
| Alliancebernstein L.P. | 10,950 | $20.3K | 0.00% | −440−3.9% | Reduced |
| UBS Group AG | 7,667 | $18.8K | 0.00% | −9,947−56.5% | Reduced |
| CWM, LLC | 5,793 | $14.2K | 0.00% | +5,528+2,086.0% | Added |
| The PNC Financial Services Group, Inc. | 5,720 | $14.0K | 0.00% | +2,098+57.9% | Added |
| Barclays PLC | 5,581 | $13.7K | 0.00% | −32,483−85.3% | Reduced |
| Simplex Trading, LLC | 5,538 | $13.6K | 0.00% | +5,538 | New |
| Legal & General Group Plc | 2,179 | $5.34K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 1,924 | $4.71K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 1,416 | $3.47K | 0.00% | +1,416 | New |
| Citigroup Inc | 1,127 | $2.76K | 0.00% | +578+105.3% | Added |
| Sterling Capital Management LLC | 803 | $1.97K | 0.00% | −871−52.0% | Reduced |
| Allianz SE | 800 | $1.96K | 0.00% | +800 | New |
| Advisory Services Network, LLC | 500 | $1.23K | 0.00% | +500 | New |
| Allworth Financial LP | 202 | $495 | 0.00% | +202 | New |
| Optiver Holding B.V. | 200 | $490 | 0.00% | −128−39.0% | Reduced |
| Westside Investment Management, Inc. | 187 | $458 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 168 | $412 | 0.00% | +168 | New |
| Rothschild Investment LLC | 133 | $326 | 0.00% | +133 | New |
| SBI Securities Co., Ltd. | 101 | $247 | 0.00% | −19−15.8% | Reduced |
| EverSource Wealth Advisors, LLC | 84 | $205 | 0.00% | +76+950.0% | Added |
| Basecamp Wealth Advisors LLC | 57 | $140 | 0.00% | +57 | New |
| Root Financial Partners, LLC | 32 | $78 | 0.00% | +32 | New |
| Transamerica Financial Advisors, Inc. | 31 | $75 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 25 | $62 | 0.00% | +21+525.0% | Added |
| Essential Partners LLC | 20 | $49 | 0.00% | +20 | New |
| SRS Capital Advisors, Inc. | 17 | $42 | 0.00% | +17 | New |
| SJS Investment Consulting Inc. | 17 | $42 | 0.00% | +17 | New |
| Wealth Preservation Advisors, LLC | 15 | $37 | 0.00% | +15 | New |
| Farther Finance Advisors, LLC | 14 | $33 | 0.00% | +14 | New |
| JPL Wealth Management, LLC | 9 | $23 | 0.00% | +9 | New |
| IFP Advisors, Inc | 5 | $12 | 0.00% | −26−83.9% | Reduced |
| Caitong International Asset Management Co., Ltd | 2 | $5 | 0.00% | +2 | New |
| Royal Bank of Canada | 1 | $0 | 0.00% | −1,099−99.9% | Reduced |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −97,902−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −72,619−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −72,088−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −65,875−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −45,235−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −30,801−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −20,498−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −17,973−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −14,925−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −10,710−100.0% | Sold out |