Mammoth Energy ServicesTUSK
13F holders, Q1 2025 (March 31)65holders −1
8new positions
9sold out
3famous investors
$2.04avg. 13F price*
At the end of Q1 2025, 65 institutions reported holding Mammoth Energy Services Inc. (TUSK) in their 13F filings, down 1 from Q4 2024. 8 opened new positions and 9 sold out. The largest holders were Wexford Capital LP ($45.0M), Adage Capital Partners Gp, L.L.C. ($8.5M) and Valueworks LLC ($5.7M). 3 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Mammoth Energy Services Inc.
- CUSIP
- 56155L108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 8 | $239K |
| Exits | 9 | $186K |
All 13F filers, Q4 2024 → Q1 2025: 438,569 shares bought and 727,945 shares sold, net −289,376 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 65 holders
| Wexford Capital LP | 11.71% | No change | 22,068,212 | $45.0M |
| Adage Capital Partners Gp, L.L.C. | 0.02% | Add +1.2% | 4,150,000 | $8.5M |
| Valueworks LLC | 2.16% | Reduce -0.5% | 2,808,860 | $5.7M |
| BlackRock, Inc. | 0.00% | Reduce -1.0% | 1,460,797 | $3.0M |
| Royce & Associates LP | 0.03% | Reduce -10.8% | 1,293,637 | $2.6M |
| Dimensional Fund Advisors LP | 0.00% | Add +1.0% | 1,001,204 | $2.0M |
| Vanguard Group Inc. | 0.00% | Reduce -0.2% | 944,535 | $1.9M |
| Geode Capital Management, LLC | 0.00% | Add +1.4% | 545,164 | $1.1M |
| State Street Corp. | 0.00% | No change | 402,363 | $821K |
| Bridgeway Capital Management, LLC | 0.02% | Reduce -27.1% | 335,685 | $685K |
| Rangeley Capital, LLC | 0.48% | Reduce -52.4% | 205,880 | $420K |
| Northern Trust Corp. | 0.00% | Reduce -1.5% | 203,027 | $414K |
| Citadel Advisors | 0.00% | Add +930.3% | 184,071 | $376K |
| CastleKnight Management LP | 0.04% | No change | 167,433 | $342K |
| Empowered Funds, LLC | 0.00% | Add +8.9% | 159,685 | $326K |
| Renaissance Technologies | 0.00% | Add +1.3% | 135,272 | $276K |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.6% | 121,249 | $247K |
| Stifel Financial Corp. | 0.00% | Reduce -0.1% | 105,572 | $215K |
| Susquehanna International Group, LLP | 0.00% | Add +57.0% | 93,489 | $191K |
| Morgan Stanley | 0.00% | Add +0.3% | 91,234 | $186K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 70,674 | $144K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -25.6% | 66,588 | $136K |
| Wellington Management Group LLP | 0.00% | Add +24.7% | 61,799 | $126K |
| Osaic Holdings, Inc. | 0.00% | No change | 59,550 | $121K |
| Millennium Management | 0.00% | New | 58,674 | $120K |
| Lanark Financial, Inc. | 0.01% | — | 56,940 | $116K |
| Barclays PLC | 0.00% | Reduce -19.5% | 49,521 | $101K |
| Nuveen, LLC | 0.00% | — | 36,843 | $75K |
| UBS Group AG | 0.00% | Add +8.4% | 30,221 | $62K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 26,473 | $55K |
| Rhumbline Advisers | 0.00% | Reduce -2.0% | 24,047 | $49K |
| NJ State Employees Deferred Compensation Plan | 0.01% | No change | 24,000 | $49K |
| JPMorgan Chase & Co. | 0.00% | Reduce -64.4% | 22,470 | $46K |
| Intech Investment Management LLC | 0.00% | New | 17,873 | $36K |
| Citigroup Inc. | 0.00% | Reduce -54.6% | 17,319 | $35K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.5% | 14,594 | $30K |
| Wells Fargo & Company | 0.00% | Add +2.3% | 14,584 | $30K |
| Bank of America Corp. | 0.00% | Reduce -38.0% | 14,177 | $29K |
| Penbrook Management LLC | 0.02% | Reduce -36.9% | 14,000 | $29K |
| FMR LLC | 0.00% | Add +44.6% | 13,434 | $27K |
| Gsa Capital Partners LLP | 0.00% | New | 12,029 | $25K |
| Archer Investment Corp | 0.01% | Reduce -1.6% | 12,200 | $25K |
| PDT Partners, LLC | 0.00% | Reduce -21.9% | 12,074 | $25K |
| Corebridge Financial, Inc. | 0.00% | Reduce -1.5% | 11,904 | $24K |
| Jane Street Group, LLC | 0.00% | Reduce -25.1% | 11,647 | $24K |
| Acadian Asset Management LLC | 0.00% | New | 11,711 | $23K |
| Wolverine Trading, LLC | 0.00% | New | 10,872 | $23K |
| Simplex Trading, LLC | 0.00% | Add +749.0% | 11,079 | $22K |
| New York State Common Retirement Fund | 0.00% | No change | 10,696 | $22K |
| BNP Paribas Financial Markets | 0.00% | Add +101.9% | 10,538 | $21K |
| Group One Trading LLC | 0.00% | New | 5,789 | $12K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +27.3% | 4,636 | $9K |
| Union Bancaire Privee, UBP SA | 0.00% | No change | 4,230 | $9K |
| Royal Bank of Canada | 0.00% | Reduce -26.7% | 3,910 | $8K |
| PNC Financial Services Group, Inc. | 0.00% | Add +4700.0% | 2,304 | $5K |
| Legal & General Group Plc | 0.00% | No change | 2,179 | $4K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 1,924 | $4K |
| California State Teachers Retirement System | 0.00% | No change | 1,761 | $4K |
| Amalgamated Bank | 0.00% | No change | 785 | $2K |
| Cwm, LLC | 0.00% | Add +589.3% | 641 | $1K |
| Sterling Capital Management LLC | 0.00% | Reduce -47.0% | 437 | $891 |
| Nisa Investment Advisors, LLC | 0.00% | Add +152.8% | 134 | $273 |
| SBI Securities Co., Ltd. | 0.00% | No change | 120 | $245 |
| True Wealth Design, LLC | 0.00% | New | 7 | $15 |
| EverSource Wealth Advisors, LLC | 0.00% | New | 4 | $8 |
"% of holder's portfolio" is TUSK's weight in each manager's 13F, not the share of Mammoth Energy Services Inc. the manager owns.