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, Q2 2021
Institutional positions in Mammoth Energy Services, Inc. as of Jun 30, 2021. 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
- 52
- −2 vs. Q1 2021
- Shares held
- 29.2M
- +376.4K (+1.3%) vs. Q1 2021
- Total value
- $134.0M
- −$19.3M (−12.6%) vs. Q1 2021
- New holders
- 7
- 19 more added
- Sold out
- 9
- 13 more reduced
Compare with Q1 2021: 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, Q2 2021
Shares, value and share of portfolio for each institution holding Mammoth Energy Services, Inc.; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wexford Capital LP | 22,066,259 | $101.3M | 15.26% | 00.0% | Unchanged |
| Valueworks LLC | 3,512,871 | $16.1M | 6.95% | +245,135+7.5% | Added |
| Vanguard Group Inc | 853,341 | $3.92M | 0.00% | +215,841+33.9% | Added |
| Bridgeway Capital Management, LLC | 476,500 | $2.19M | 0.04% | +22,700+5.0% | Added |
| Geode Capital Management, LLC | 310,369 | $1.42M | 0.00% | +3,391+1.1% | Added |
| Renaissance Technologies LLC | 222,524 | $1.02M | 0.00% | +88,452+66.0% | Added |
| BlackRock Inc. | 201,515 | $925.0K | 0.00% | −84,662−29.6% | Reduced |
| Dimensional Fund Advisors LP | 197,030 | $904.0K | 0.00% | −8,756−4.3% | Reduced |
| Two Sigma Advisers, LP | 141,200 | $648.0K | 0.00% | −23,300−14.2% | Reduced |
| Acadian Asset Management LLC | 102,360 | $470.0K | 0.00% | +33,514+48.7% | Added |
| Bank of New York Mellon Corp | 91,232 | $419.0K | 0.00% | −12,153−11.8% | Reduced |
| Squarepoint Ops LLC | 85,800 | $394.0K | 0.00% | +583+0.7% | Added |
| Millennium Management LLC | 84,336 | $387.0K | 0.00% | −148,783−63.8% | Reduced |
| Northern Trust Corp | 76,993 | $354.0K | 0.00% | −6,591−7.9% | Reduced |
| Royce & Associates LP | 65,976 | $303.0K | 0.00% | +65,976 | New |
| Morgan Stanley | 63,068 | $290.0K | 0.00% | +62,991+81,806.5% | Added |
| Winton Group Ltd | 60,321 | $277.0K | 0.01% | −2,582−4.1% | Reduced |
| Stifel Financial Corp | 55,572 | $255.0K | 0.00% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 55,029 | $253.0K | 0.00% | 00.0% | Unchanged |
| State Street Corp | 52,407 | $241.0K | 0.00% | +41,507+380.8% | Added |
| Boston Partners | 47,725 | $219.0K | 0.00% | +47,725 | New |
| Two Sigma Investments, LP | 45,720 | $210.0K | 0.00% | −13,458−22.7% | Reduced |
| Russell Investments Group, Ltd. | 40,255 | $184.0K | 0.00% | +40,255 | New |
| Price T Rowe Associates Inc | 39,800 | $183.0K | 0.00% | −4,470−10.1% | Reduced |
| Invesco Ltd. | 37,703 | $173.0K | 0.00% | −315−0.8% | Reduced |
| NJ State Employees Deferred Compensation Plan | 24,000 | $110.0K | 0.01% | 00.0% | Unchanged |
| Sigma Planning Corp | 22,000 | $101.0K | 0.00% | +500+2.3% | Added |
| JPMorgan Chase & Co | 19,379 | $89.0K | 0.00% | +17,965+1,270.5% | Added |
| PDT Partners, LLC | 19,313 | $89.0K | 0.01% | +19,313 | New |
| Brandywine Global Investment Management, LLC | 19,038 | $87.0K | 0.00% | +88+0.5% | Added |
| Charles Schwab Investment Management Inc | 15,843 | $73.0K | 0.00% | 00.0% | Unchanged |
| Occudo Quantitative Strategies LP | 13,851 | $64.0K | 0.01% | +7+0.1% | Added |
| HSBC Holdings PLC | 14,243 | $64.0K | 0.00% | +14,243 | New |
| Susquehanna International Group, LLP | 13,005 | $60.0K | 0.00% | −96,953−88.2% | Reduced |
| Mad River Investors | 10,700 | $49.0K | 0.03% | 00.0% | Unchanged |
| Bank of America Corp | 6,750 | $31.0K | 0.00% | +5,801+611.3% | Added |
| Schroder Investment Management Group | 6,500 | $30.0K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 5,691 | $26.0K | 0.00% | +125+2.2% | Added |
| Tower Research Capital LLC (TRC) | 5,200 | $24.0K | 0.00% | +4,666+873.8% | Added |
| Barclays PLC | 2,872 | $13.0K | 0.00% | +546+23.5% | Added |
| NEXT Financial Group, Inc | 2,600 | $12.0K | 0.00% | 00.0% | Unchanged |
| American Portfolios Advisors | 2,280 | $10.5K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 2,123 | $10.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 2,008 | $9.00K | 0.00% | +10.0% | Added |
| UBS Group AG | 2,032 | $9.00K | 0.00% | +2,020+16,833.3% | Added |
| Group One Trading, L.P. | 800 | $4.00K | 0.00% | −3,100−79.5% | Reduced |
| BNP Paribas Arbitrage, SA | 534 | $2.45K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 334 | $2.00K | 0.00% | −3,538−91.4% | Reduced |
| Advisory Services Network, LLC | 500 | $2.00K | 0.00% | +500 | New |
| O'Shaughnessy Asset Management, LLC | 286 | $1.00K | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 205 | $1.00K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 1 | $0 | 0.00% | +1 | New |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −40,601−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −36,871−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −26,542−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −12,755−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −11,424−100.0% | Sold out |
| Pinz Capital Management, LP | 0 | $0 | 0.00% | −8,028−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −6,197−100.0% | Sold out |
| Dorsey Wright & Associates | 0 | $0 | 0.00% | −6,190−100.0% | Sold out |
| International Assets Investment Management, LLC | 0 | $0 | 0.00% | −204−100.0% | Sold out |