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 2025
Institutional positions in Mammoth Energy Services, Inc. as of Jun 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
- 66
- 0 vs. Q1 2025
- Shares held
- 36.4M
- −912.9K (−2.4%) vs. Q1 2025
- Total value
- $101.9M
- +$25.8M (+33.9%) vs. Q1 2025
- New holders
- 6
- 30 more added
- Sold out
- 6
- 18 more reduced
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Mammoth Energy Services, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wexford Capital LP | 22,096,068 | $61.9M | 17.26% | +27,856+0.1% | Added |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $12.8M | 0.02% | +425,000+10.2% | Added |
| Valueworks LLC | 2,389,031 | $6.70M | 2.21% | −419,829−14.9% | Reduced |
| BlackRock, Inc. | 1,469,099 | $4.11M | 0.00% | +8,302+0.6% | Added |
| Dimensional Fund Advisors LP | 993,914 | $2.78M | 0.00% | −7,290−0.7% | Reduced |
| Vanguard Group Inc | 957,241 | $2.68M | 0.00% | +12,706+1.3% | Added |
| Geode Capital Management, LLC | 580,659 | $1.63M | 0.00% | +35,495+6.5% | Added |
| State Street Corp | 408,763 | $1.14M | 0.00% | +6,400+1.6% | Added |
| Bridgeway Capital Management, LLC | 350,454 | $981.3K | 0.02% | +14,769+4.4% | Added |
| Northern Trust Corp | 193,842 | $542.8K | 0.00% | −9,185−4.5% | Reduced |
| JPMorgan Chase & Co | 185,761 | $520.1K | 0.00% | +163,291+726.7% | Added |
| Morgan Stanley | 185,260 | $518.7K | 0.00% | +94,026+103.1% | Added |
| Empowered Funds, LLC | 174,454 | $488.5K | 0.01% | +14,769+9.2% | Added |
| CastleKnight Management LP | 167,433 | $468.8K | 0.03% | 00.0% | Unchanged |
| Citadel Advisors LLC | 146,482 | $410.1K | 0.00% | −37,589−20.4% | Reduced |
| Renaissance Technologies LLC | 132,172 | $370.1K | 0.00% | −3,100−2.3% | Reduced |
| Bank of New York Mellon Corp | 132,145 | $370.0K | 0.00% | +10,896+9.0% | Added |
| Susquehanna International Group, LLP | 122,552 | $343.1K | 0.00% | +29,063+31.1% | Added |
| Wellington Management Group LLP | 115,212 | $322.6K | 0.00% | +53,413+86.4% | Added |
| Stifel Financial Corp | 105,869 | $296.4K | 0.00% | +297+0.3% | Added |
| Royal Bank of Canada | 87,289 | $244.0K | 0.00% | +83,379+2,132.5% | Added |
| Charles Schwab Investment Management Inc | 70,674 | $197.9K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 66,548 | $186.3K | 0.00% | +17,027+34.4% | Added |
| Marshall Wace, LLP | 57,436 | $160.8K | 0.00% | +57,436 | New |
| Goldman Sachs Group Inc | 53,601 | $150.1K | 0.00% | −12,987−19.5% | Reduced |
| NBC Securities, Inc. | 44,580 | $124.0K | 0.01% | −12,360−21.7% | Reduced |
| Price T Rowe Associates Inc | 43,285 | $122.0K | 0.00% | +16,812+63.5% | Added |
| Royce & Associates LP | 41,154 | $115.2K | 0.00% | −1,252,483−96.8% | Reduced |
| Nuveen, LLC | 36,843 | $103.2K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 36,671 | $102.7K | 0.00% | +6,450+21.3% | Added |
| XTX Topco Ltd | 36,662 | $102.7K | 0.00% | +36,662 | New |
| Rhumbline Advisers | 31,804 | $89.0K | 0.00% | +7,757+32.3% | Added |
| Advisor Group Holdings, Inc. | 29,433 | $82.4K | 0.00% | −30,117−50.6% | Reduced |
| Acadian Asset Management LLC | 28,563 | $79.0K | 0.00% | +16,852+143.9% | Added |
| NJ State Employees Deferred Compensation Plan | 24,000 | $67.2K | 0.01% | 00.0% | Unchanged |
| Millennium Management LLC | 21,851 | $61.2K | 0.00% | −36,823−62.8% | Reduced |
| Jane Street Group, LLC | 17,268 | $48.4K | 0.00% | +5,621+48.3% | Added |
| Wells Fargo & Company | 15,568 | $43.6K | 0.00% | +984+6.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 13,970 | $39.1K | 0.00% | −624−4.3% | Reduced |
| BNP Paribas Arbitrage, SA | 13,525 | $37.9K | 0.00% | +2,987+28.3% | Added |
| Bank of America Corp | 13,069 | $36.6K | 0.00% | −1,108−7.8% | Reduced |
| Penbrook Management LLC | 13,000 | $36.4K | 0.03% | −1,000−7.1% | Reduced |
| Archer Investment Corp | 12,200 | $34.2K | 0.01% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 12,121 | $33.9K | 0.00% | +12,121 | New |
| Intech Investment Management LLC | 12,080 | $33.8K | 0.00% | −5,793−32.4% | Reduced |
| FMR LLC | 10,914 | $30.6K | 0.00% | −2,520−18.8% | Reduced |
| New York State Common Retirement Fund | 10,696 | $29.9K | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 10,190 | $28.5K | 0.00% | +10,190 | New |
| Police & Firemen's Retirement System of New Jersey | 9,637 | $27.0K | 0.00% | +9,637 | New |
| Citigroup Inc | 9,458 | $26.5K | 0.00% | −7,861−45.4% | Reduced |
| Group One Trading, L.P. | 8,164 | $22.9K | 0.00% | +2,375+41.0% | Added |
| Tower Research Capital LLC (TRC) | 7,569 | $21.2K | 0.00% | +2,933+63.3% | Added |
| Union Bancaire Privee, UBP SA | 4,230 | $12.2K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 4,087 | $11.4K | 0.00% | +1,783+77.4% | Added |
| Legal & General Group Plc | 2,179 | $6.10K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 2,419 | $6.00K | 0.00% | −8,660−78.2% | Reduced |
| Ameritas Investment Partners, Inc. | 1,924 | $5.39K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 1,817 | $5.09K | 0.00% | +1,683+1,256.0% | Added |
| California State Teachers Retirement System | 1,761 | $4.93K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 785 | $2.00K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 637 | $2.00K | 0.00% | −4−0.6% | Reduced |
| Sterling Capital Management LLC | 651 | $1.82K | 0.00% | +214+49.0% | Added |
| SBI Securities Co., Ltd. | 122 | $342 | 0.00% | +2+1.7% | Added |
| True Wealth Design, LLC | 12 | $34 | 0.00% | +5+71.4% | Added |
| EverSource Wealth Advisors, LLC | 4 | $11 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 3 | $8 | 0.00% | +3 | New |
| Rangeley Capital, LLC | 0 | $0 | 0.00% | −205,880−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −12,029−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −12,074−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −11,904−100.0% | Sold out |
| Wolverine Trading, LLC | 0 | $0 | 0.00% | −10,872−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | 0 | Sold out |