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 |
|---|---|---|---|---|---|
| Royal Bank of Canada | 1 | $0 | 0.00% | −1,099−99.9% | Reduced |
| Caitong International Asset Management Co., Ltd | 2 | $5 | 0.00% | +2 | New |
| IFP Advisors, Inc | 5 | $12 | 0.00% | −26−83.9% | Reduced |
| JPL Wealth Management, LLC | 9 | $23 | 0.00% | +9 | New |
| Farther Finance Advisors, LLC | 14 | $33 | 0.00% | +14 | New |
| Wealth Preservation Advisors, LLC | 15 | $37 | 0.00% | +15 | New |
| SRS Capital Advisors, Inc. | 17 | $42 | 0.00% | +17 | New |
| SJS Investment Consulting Inc. | 17 | $42 | 0.00% | +17 | New |
| Essential Partners LLC | 20 | $49 | 0.00% | +20 | New |
| True Wealth Design, LLC | 25 | $62 | 0.00% | +21+525.0% | Added |
| Transamerica Financial Advisors, Inc. | 31 | $75 | 0.00% | 00.0% | Unchanged |
| Root Financial Partners, LLC | 32 | $78 | 0.00% | +32 | New |
| Basecamp Wealth Advisors LLC | 57 | $140 | 0.00% | +57 | New |
| EverSource Wealth Advisors, LLC | 84 | $205 | 0.00% | +76+950.0% | Added |
| SBI Securities Co., Ltd. | 101 | $247 | 0.00% | −19−15.8% | Reduced |
| Rothschild Investment LLC | 133 | $326 | 0.00% | +133 | New |
| MAI Capital Management | 168 | $412 | 0.00% | +168 | New |
| Westside Investment Management, Inc. | 187 | $458 | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 200 | $490 | 0.00% | −128−39.0% | Reduced |
| Allworth Financial LP | 202 | $495 | 0.00% | +202 | New |
| Advisory Services Network, LLC | 500 | $1.23K | 0.00% | +500 | New |
| Allianz SE | 800 | $1.96K | 0.00% | +800 | New |
| Sterling Capital Management LLC | 803 | $1.97K | 0.00% | −871−52.0% | Reduced |
| Citigroup Inc | 1,127 | $2.76K | 0.00% | +578+105.3% | Added |
| UBS Asset Management Americas Inc | 1,416 | $3.47K | 0.00% | +1,416 | New |
| Ameritas Investment Partners, Inc. | 1,924 | $4.71K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 2,179 | $5.34K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 5,538 | $13.6K | 0.00% | +5,538 | New |
| Barclays PLC | 5,581 | $13.7K | 0.00% | −32,483−85.3% | Reduced |
| The PNC Financial Services Group, Inc. | 5,720 | $14.0K | 0.00% | +2,098+57.9% | Added |
| CWM, LLC | 5,793 | $14.2K | 0.00% | +5,528+2,086.0% | Added |
| UBS Group AG | 7,667 | $18.8K | 0.00% | −9,947−56.5% | Reduced |
| Alliancebernstein L.P. | 10,950 | $20.3K | 0.00% | −440−3.9% | Reduced |
| Vanguard Global Advisers, LLC | 8,774 | $21.5K | 0.00% | +8,774 | New |
| Wells Fargo & Company | 9,469 | $23.2K | 0.00% | −18,032−65.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 9,637 | $23.6K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 10,696 | $26.2K | 0.00% | 00.0% | Unchanged |
| Valueworks LLC | 10,720 | $26.3K | 0.01% | −2,055−16.1% | Reduced |
| JPMorgan Chase & Co | 10,275 | $26.9K | 0.00% | −155,709−93.8% | Reduced |
| Archer Investment Corp | 11,200 | $27.4K | 0.01% | 00.0% | Unchanged |
| FMR LLC | 12,142 | $29.7K | 0.00% | +1,036+9.3% | Added |
| Tower Research Capital LLC (TRC) | 12,522 | $30.7K | 0.00% | +6,971+125.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 12,570 | $30.8K | 0.00% | +272+2.2% | Added |
| Price T Rowe Associates Inc | 13,385 | $33.0K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 13,579 | $33.3K | 0.00% | +13,579 | New |
| Gsa Capital Partners LLP | 13,909 | $34.0K | 0.00% | +13,909 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 14,510 | $35.5K | 0.00% | +14,510 | New |
| Sanctuary Advisors, LLC | 16,676 | $40.9K | 0.00% | +16,676 | New |
| BNP Paribas Arbitrage, SA | 16,747 | $41.0K | 0.00% | −267−1.6% | Reduced |
| Creative Planning | 16,950 | $41.5K | 0.00% | +4,844+40.0% | Added |
| Schonfeld Strategic Advisors LLC | 18,325 | $44.9K | 0.00% | +18,325 | New |
| Steinberganna Wealth Management | 18,360 | $45.0K | 0.02% | +4,745+34.9% | Added |
| Verdad Advisers, LP | 22,729 | $55.7K | 0.06% | +22,729 | New |
| Jane Street Group, LLC | 22,854 | $56.0K | 0.00% | −16,798−42.4% | Reduced |
| Levin Capital Strategies, L.P. | 25,000 | $61.3K | 0.00% | +25,000 | New |
| Bank of America Corp | 25,589 | $62.7K | 0.00% | +3,517+15.9% | Added |
| Mariner, LLC | 26,873 | $65.8K | 0.00% | +26,873 | New |
| Rhumbline Advisers | 32,863 | $80.5K | 0.00% | +220+0.7% | Added |
| Occudo Quantitative Strategies LP | 29,336 | $83.9K | 0.00% | +29,336 | New |
| Susquehanna International Group, LLP | 36,299 | $88.9K | 0.00% | +26,035+253.7% | Added |
| Nuveen, LLC | 36,843 | $90.3K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 51,620 | $126.5K | 0.00% | −24,544−32.2% | Reduced |
| Charles Schwab Investment Management Inc | 58,861 | $144.2K | 0.00% | −11,813−16.7% | Reduced |
| AQR Capital Management LLC | 66,731 | $163.5K | 0.00% | +55,476+492.9% | Added |
| Russell Investments Group, Ltd. | 68,030 | $166.7K | 0.00% | −179,461−72.5% | Reduced |
| Wellington Management Group LLP | 68,415 | $167.6K | 0.00% | +12,017+21.3% | Added |
| Advisor Group Holdings, Inc. | 72,419 | $177.4K | 0.00% | −7,267−9.1% | Reduced |
| Stifel Financial Corp | 105,572 | $258.7K | 0.00% | 00.0% | Unchanged |
| Centiva Capital, LP | 111,108 | $272.2K | 0.01% | +69,791+168.9% | Added |
| Bank of New York Mellon Corp | 132,539 | $324.7K | 0.00% | −135−0.1% | Reduced |
| Vanguard Portfolio Management LLC | 140,145 | $343.4K | 0.00% | +140,145 | New |
| Morgan Stanley | 152,723 | $374.2K | 0.00% | −139,975−47.8% | Reduced |
| Boston Partners | 154,388 | $378.3K | 0.00% | +154,388 | New |
| Los Angeles Capital Management LLC | 163,259 | $400.0K | 0.00% | +163,259 | New |
| Vanguard Fiduciary Trust Co | 170,131 | $416.8K | 0.00% | +170,131 | New |
| Northern Trust Corp | 187,128 | $458.5K | 0.00% | +19,283+11.5% | Added |
| Acadian Asset Management LLC | 204,105 | $498.0K | 0.00% | +97,213+90.9% | Added |
| Goldman Sachs Group Inc | 223,489 | $547.5K | 0.00% | +133,545+148.5% | Added |
| Renaissance Technologies LLC | 231,972 | $568.3K | 0.00% | +45,900+24.7% | Added |
| Empowered Funds, LLC | 241,313 | $591.2K | 0.00% | +22,322+10.2% | Added |
| Citadel Advisors LLC | 331,367 | $811.8K | 0.00% | +111,256+50.5% | Added |
| Bridgeway Capital Management, LLC | 332,313 | $814.2K | 0.02% | −77,678−18.9% | Reduced |
| State Street Corp | 421,922 | $1.03M | 0.00% | +13,438+3.3% | Added |
| Geode Capital Management, LLC | 610,926 | $1.50M | 0.00% | +25,207+4.3% | Added |
| Peapod Lane Capital LLC | 599,805 | $1.51M | 1.24% | +599,805 | New |
| Dimensional Fund Advisors LP | 686,199 | $1.68M | 0.00% | −13,479−1.9% | Reduced |
| Vanguard Capital Management LLC | 819,120 | $2.01M | 0.00% | +819,120 | New |
| BlackRock, Inc. | 1,454,839 | $3.56M | 0.00% | −18,205−1.2% | Reduced |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $11.2M | 0.02% | 00.0% | Unchanged |
| Wexford Capital LP | 22,068,212 | $54.1M | 8.91% | −27,856−0.1% | 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 |