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, Q3 2025
Institutional positions in Mammoth Energy Services, Inc. as of Sep 30, 2025. 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
- 77
- +11 vs. Q2 2025
- Shares held
- 36.1M
- −340.2K (−0.9%) vs. Q2 2025
- Total value
- $82.6M
- −$19.4M (−19.0%) vs. Q2 2025
- New holders
- 16
- 17 more added
- Sold out
- 5
- 30 more reduced
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Mammoth Energy Services, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wexford Capital LP | 22,096,068 | $50.6M | 15.24% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $10.5M | 0.02% | 00.0% | Unchanged |
| Valueworks LLC | 2,038,205 | $4.67M | 1.36% | −350,826−14.7% | Reduced |
| BlackRock, Inc. | 1,452,463 | $3.33M | 0.00% | −16,636−1.1% | Reduced |
| Vanguard Group Inc | 945,630 | $2.17M | 0.00% | −11,611−1.2% | Reduced |
| Dimensional Fund Advisors LP | 936,414 | $2.14M | 0.00% | −57,500−5.8% | Reduced |
| Geode Capital Management, LLC | 579,105 | $1.33M | 0.00% | −1,554−0.3% | Reduced |
| State Street Corp | 406,916 | $931.8K | 0.00% | −1,847−0.5% | Reduced |
| Bridgeway Capital Management, LLC | 389,964 | $893.0K | 0.02% | +39,510+11.3% | Added |
| Citadel Advisors LLC | 268,315 | $614.4K | 0.00% | +121,833+83.2% | Added |
| Empowered Funds, LLC | 198,964 | $455.6K | 0.00% | +24,510+14.0% | Added |
| Northern Trust Corp | 192,469 | $440.8K | 0.00% | −1,373−0.7% | Reduced |
| JPMorgan Chase & Co | 182,781 | $418.6K | 0.00% | −2,980−1.6% | Reduced |
| CastleKnight Management LP | 167,433 | $383.4K | 0.02% | 00.0% | Unchanged |
| Morgan Stanley | 145,300 | $332.7K | 0.00% | −39,960−21.6% | Reduced |
| Renaissance Technologies LLC | 133,972 | $306.8K | 0.00% | +1,800+1.4% | Added |
| Bank of New York Mellon Corp | 133,755 | $306.3K | 0.00% | +1,610+1.2% | Added |
| Stifel Financial Corp | 105,869 | $242.4K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 84,135 | $193.0K | 0.00% | −3,154−3.6% | Reduced |
| Susquehanna International Group, LLP | 72,878 | $166.9K | 0.00% | −49,674−40.5% | Reduced |
| Deutsche Bank AG | 72,183 | $165.3K | 0.00% | +72,183 | New |
| Charles Schwab Investment Management Inc | 70,674 | $161.8K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 59,269 | $135.7K | 0.00% | −7,279−10.9% | Reduced |
| Wellington Management Group LLP | 56,398 | $129.2K | 0.00% | −58,814−51.0% | Reduced |
| Goldman Sachs Group Inc | 52,081 | $119.3K | 0.00% | −1,520−2.8% | Reduced |
| Jane Street Group, LLC | 51,803 | $118.6K | 0.00% | +34,535+200.0% | Added |
| Marshall Wace, LLP | 44,517 | $101.9K | 0.00% | −12,919−22.5% | Reduced |
| Acadian Asset Management LLC | 40,242 | $90.0K | 0.00% | +11,679+40.9% | Added |
| Nuveen, LLC | 36,843 | $84.4K | 0.00% | 00.0% | Unchanged |
| NBC Securities, Inc. | 36,200 | $82.9K | 0.01% | −8,380−18.8% | Reduced |
| Rhumbline Advisers | 34,781 | $79.6K | 0.00% | +2,977+9.4% | Added |
| Advisor Group Holdings, Inc. | 31,103 | $73.7K | 0.00% | +1,670+5.7% | Added |
| GWM Advisors LLC | 25,494 | $58.4K | 0.00% | +25,494 | New |
| XTX Topco Ltd | 25,082 | $57.4K | 0.00% | −11,580−31.6% | Reduced |
| Steinberganna Wealth Management | 24,265 | $55.6K | 0.03% | +24,265 | New |
| NJ State Employees Deferred Compensation Plan | 24,000 | $55.0K | 0.01% | 00.0% | Unchanged |
| UBS Group AG | 20,468 | $46.9K | 0.00% | −16,203−44.2% | Reduced |
| Wells Fargo & Company | 18,903 | $43.3K | 0.00% | +3,335+21.4% | Added |
| Royce & Associates LP | 17,954 | $41.1K | 0.00% | −23,200−56.4% | Reduced |
| Franklin Resources Inc | 15,791 | $36.2K | 0.00% | +15,791 | New |
| BNP Paribas Arbitrage, SA | 15,470 | $35.4K | 0.00% | +1,945+14.4% | Added |
| HRT Financial LP | 15,076 | $34.0K | 0.00% | +15,076 | New |
| Virtu Financial LLC | 14,148 | $32.0K | 0.00% | +14,148 | New |
| Price T Rowe Associates Inc | 13,385 | $31.0K | 0.00% | −29,900−69.1% | Reduced |
| FMR LLC | 12,646 | $29.0K | 0.00% | +1,732+15.9% | Added |
| Intech Investment Management LLC | 12,175 | $27.9K | 0.00% | +95+0.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 11,946 | $27.4K | 0.00% | −2,024−14.5% | Reduced |
| Bank of America Corp | 11,831 | $27.1K | 0.00% | −1,238−9.5% | Reduced |
| Alliancebernstein L.P. | 11,390 | $26.1K | 0.00% | +1,200+11.8% | Added |
| AQR Capital Management LLC | 11,299 | $25.9K | 0.00% | +11,299 | New |
| Archer Investment Corp | 11,200 | $25.6K | 0.01% | −1,000−8.2% | Reduced |
| Invesco Ltd. | 10,733 | $24.6K | 0.00% | +10,733 | New |
| New York State Common Retirement Fund | 10,696 | $24.5K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 9,637 | $22.1K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 4,870 | $11.2K | 0.00% | −2,699−35.7% | Reduced |
| Union Bancaire Privee, UBP SA | 4,230 | $10.3K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 3,745 | $8.57K | 0.00% | −342−8.4% | Reduced |
| Legal & General Group Plc | 2,179 | $4.99K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 2,091 | $4.79K | 0.00% | +2,091 | New |
| Ameritas Investment Partners, Inc. | 1,924 | $4.41K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 1,762 | $4.04K | 0.00% | +1+0.1% | Added |
| Sterling Capital Management LLC | 1,674 | $3.83K | 0.00% | +1,023+157.1% | Added |
| Amalgamated Bank | 785 | $2.00K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 727 | $1.67K | 0.00% | −8,731−92.3% | Reduced |
| Advisory Services Network, LLC | 500 | $1.15K | 0.00% | +500 | New |
| CWM, LLC | 653 | $1.00K | 0.00% | +16+2.5% | Added |
| Nisa Investment Advisors, LLC | 431 | $987 | 0.00% | −1,386−76.3% | Reduced |
| Optiver Holding B.V. | 328 | $751 | 0.00% | +328 | New |
| Transamerica Financial Advisors, Inc. | 156 | $357 | 0.00% | +156 | New |
| SBI Securities Co., Ltd. | 120 | $275 | 0.00% | −2−1.6% | Reduced |
| SRS Capital Advisors, Inc. | 70 | $160 | 0.00% | +70 | New |
| IFP Advisors, Inc | 30 | $69 | 0.00% | +30 | New |
| Clearstead Advisors, LLC | 11 | $26 | 0.00% | +11 | New |
| True Wealth Design, LLC | 8 | $19 | 0.00% | −4−33.3% | Reduced |
| EverSource Wealth Advisors, LLC | 4 | $9 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 2 | $5 | 0.00% | −1−33.3% | Reduced |
| Allworth Financial LP | 1 | $3 | 0.00% | +1 | New |
| Millennium Management LLC | 0 | $0 | 0.00% | −21,851−100.0% | Sold out |
| Penbrook Management LLC | 0 | $0 | 0.00% | −13,000−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −12,121−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −8,164−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −2,419−100.0% | Sold out |