Mammoth Energy ServicesTUSK
13F holders, Q4 2025 (December 31)72holders −5
9new positions
13sold out
4famous investors
$1.85avg. 13F price*
At the end of Q4 2025, 72 institutions reported holding Mammoth Energy Services Inc. (TUSK) in their 13F filings, down 5 from Q3 2025. 9 opened new positions and 13 sold out. The largest holders were Wexford Capital LP ($40.9M), Adage Capital Partners Gp, L.L.C. ($8.5M) and BlackRock, Inc. ($2.7M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Mammoth Energy Services Inc.
- CUSIP
- 56155L108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $705K |
| Exits | 13 | $747K |
All 13F filers, Q3 2025 → Q4 2025: 1,226,411 shares bought and 2,895,517 shares sold, net −1,669,106 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 72 holders
| Wexford Capital LP | 10.51% | No change | 22,096,068 | $40.9M |
| Adage Capital Partners Gp, L.L.C. | 0.01% | No change | 4,575,000 | $8.5M |
| BlackRock, Inc. | 0.00% | Add +1.4% | 1,473,044 | $2.7M |
| Vanguard Group Inc. | 0.00% | Add +8.1% | 1,022,411 | $1.9M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -25.3% | 699,678 | $1.3M |
| Geode Capital Management, LLC | 0.00% | Add +1.1% | 585,719 | $1.1M |
| Bridgeway Capital Management, LLC | 0.02% | Add +5.1% | 409,991 | $758K |
| State Street Corp. | 0.00% | Add +0.4% | 408,484 | $756K |
| Morgan Stanley | 0.00% | Add +101.4% | 292,698 | $541K |
| Russell Investments Group, Ltd. | 0.00% | Add +11736.0% | 247,491 | $458K |
| Citadel Advisors | 0.00% | Reduce -18.0% | 220,111 | $407K |
| Empowered Funds, LLC | 0.01% | Add +10.1% | 218,991 | $405K |
| Renaissance Technologies | 0.00% | Add +38.9% | 186,072 | $344K |
| Northern Trust Corp. | 0.00% | Reduce -12.8% | 167,845 | $311K |
| JPMorgan Chase & Co. | 0.00% | Reduce -9.2% | 165,984 | $307K |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.8% | 132,674 | $245K |
| Stifel Financial Corp. | 0.00% | Reduce -0.3% | 105,572 | $195K |
| Acadian Asset Management LLC | 0.00% | Add +165.6% | 106,892 | $195K |
| Corient Private Wealth LP | 0.00% | New | 97,902 | $181K |
| Goldman Sachs Group Inc. | 0.00% | Add +72.7% | 89,944 | $166K |
| Osaic Holdings, Inc. | 0.00% | Add +156.2% | 79,686 | $147K |
| Squarepoint Ops LLC | 0.00% | New | 76,164 | $141K |
| Landscape Capital Management, L.L.C. | 0.01% | New | 72,619 | $134K |
| Franklin Resources Inc. | 0.00% | Add +356.5% | 72,088 | $133K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 70,674 | $131K |
| Quadrature Capital Ltd | 0.00% | New | 65,875 | $122K |
| Wellington Management Group LLP | 0.00% | No change | 56,398 | $104K |
| XTX Topco Ltd | 0.00% | Add +80.3% | 45,235 | $84K |
| Centiva Capital, LP | 0.00% | New | 41,317 | $76K |
| Jane Street Group, LLC | 0.00% | Reduce -23.5% | 39,652 | $73K |
| Barclays PLC | 0.00% | Reduce -35.8% | 38,064 | $70K |
| Nuveen, LLC | 0.00% | No change | 36,843 | $68K |
| Rhumbline Advisers | 0.00% | Reduce -6.2% | 32,643 | $60K |
| Marshall Wace, LLP | 0.00% | Reduce -30.8% | 30,801 | $57K |
| Wells Fargo & Company | 0.00% | Add +45.5% | 27,501 | $51K |
| Bank of America Corp. | 0.00% | Add +86.6% | 22,072 | $41K |
| NewEdge Advisors, LLC | 0.00% | Reduce -19.6% | 20,498 | $38K |
| Virtu Financial LLC | 0.00% | Add +27.0% | 17,973 | $33K |
| UBS Group AG | 0.00% | Reduce -13.9% | 17,614 | $33K |
| BNP Paribas Financial Markets | 0.00% | Add +10.0% | 17,014 | $31K |
| Point72 Asset Management | 0.00% | New | 14,925 | $28K |
| Steinberganna Wealth Management | 0.01% | Reduce -43.9% | 13,615 | $25K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 13,385 | $25K |
| Valueworks LLC | 0.01% | Reduce -99.4% | 12,775 | $24K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +3.0% | 12,298 | $23K |
| Creative Planning | 0.00% | New | 12,106 | $22K |
| Alliancebernstein L.P. | 0.00% | No change | 11,390 | $21K |
| AQR Capital Management | 0.00% | Reduce -0.4% | 11,255 | $21K |
| Archer Investment Corp | 0.00% | No change | 11,200 | $21K |
| FMR LLC | 0.00% | Reduce -12.2% | 11,106 | $21K |
| Invesco Ltd. | 0.00% | Reduce -0.2% | 10,710 | $20K |
| New York State Common Retirement Fund | 0.00% | No change | 10,696 | $20K |
| Susquehanna International Group, LLP | 0.00% | Reduce -85.9% | 10,264 | $19K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 9,637 | $18K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +14.0% | 5,551 | $10K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -3.3% | 3,622 | $7K |
| Legal & General Group Plc | 0.00% | No change | 2,179 | $4K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 1,924 | $4K |
| Sterling Capital Management LLC | 0.00% | No change | 1,674 | $3K |
| California State Teachers Retirement System | 0.00% | Reduce -15.6% | 1,487 | $3K |
| Royal Bank of Canada | 0.00% | Reduce -98.7% | 1,100 | $2K |
| Citigroup Inc. | 0.00% | Reduce -24.5% | 549 | $1K |
| Amalgamated Bank | 0.00% | Reduce -2.9% | 762 | $1K |
| Optiver Holding B.V. | 0.00% | No change | 328 | $607 |
| Westside Investment Management, Inc. | 0.00% | New | 187 | $346 |
| SBI Securities Co., Ltd. | 0.00% | No change | 120 | $222 |
| Transamerica Financial Advisors, LLC | 0.00% | Reduce -80.1% | 31 | $57 |
| IFP Advisors, Inc | 0.00% | Add +3.3% | 31 | $57 |
| Northwestern Mutual Wealth Management Co. | 0.00% | New | 28 | $52 |
| EverSource Wealth Advisors, LLC | 0.00% | Add +100.0% | 8 | $15 |
| True Wealth Design, LLC | 0.00% | Reduce -50.0% | 4 | $8 |
| Cwm, LLC | 0.00% | Reduce -59.4% | 265 | $0 |
"% of holder's portfolio" is TUSK's weight in each manager's 13F, not the share of Mammoth Energy Services Inc. the manager owns.