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 2026
Institutional positions in Mammoth Energy Services, Inc. as of Jun 30, 2026. 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
- 93
- +4 vs. Q1 2026
- Shares held
- 26.1M
- −8.98M (−25.6%) vs. Q1 2026
- Total value
- $84.7M
- −$1.20M (−1.4%) vs. Q1 2026
- New holders
- 27
- 33 more added
- Sold out
- 23
- 23 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $63.8M |
| Q3 2025 | 77 | $83.0M |
| Q2 2025 | 66 | $102.2M |
| Q1 2025 | 66 | $76.1M |
| Q4 2024 | 67 | $112.6M |
| Q3 2024 | 64 | $151.9M |
| Q2 2024 | 67 | $127.1M |
| Q1 2024 | 67 | $142.8M |
| Q4 2023 | 67 | $175.7M |
| Q3 2023 | 75 | $183.6M |
| Q2 2023 | 72 | $186.7M |
| Q1 2023 | 77 | $161.9M |
| Q4 2022 | 80 | $323.3M |
| Q3 2022 | 58 | $126.1M |
| Q2 2022 | 49 | $535.8M |
| Q1 2022 | 50 | $512.9M |
| Q4 2021 | 44 | $434.6M |
| Q3 2021 | 46 | $22.1M |
| Q2 2021 | 52 | $134.0M |
| Q1 2021 | 54 | $153.3M |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Mammoth Energy Services, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wexford Capital LP | 12,071,823 | $39.2M | 5.38% | −9,996,389−45.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $14.9M | 0.02% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 1,059,603 | $3.44M | 0.00% | +240,483+29.4% | Added |
| Peapod Lane Capital LLC | 807,804 | $2.63M | 1.77% | +207,999+34.7% | Added |
| Dimensional Fund Advisors LP | 691,667 | $2.25M | 0.00% | +5,468+0.8% | Added |
| Jane Street Group, LLC | 506,662 | $1.65M | 0.00% | +483,808+2,117.0% | Added |
| Citadel Advisors LLC | 452,163 | $1.47M | 0.00% | +120,796+36.5% | Added |
| BlackRock, Inc. | 407,976 | $1.33M | 0.00% | −1,046,863−72.0% | Reduced |
| Marshall Wace, LLP | 395,583 | $1.29M | 0.00% | +395,583 | New |
| Johns Hopkins University | 387,359 | $1.26M | 0.08% | +387,359 | New |
| Bridgeway Capital Management, LLC | 332,313 | $1.08M | 0.02% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 329,821 | $1.07M | 0.00% | +261,791+384.8% | Added |
| Geode Capital Management, LLC | 306,028 | $995.7K | 0.00% | −304,898−49.9% | Reduced |
| Renaissance Technologies LLC | 292,280 | $949.9K | 0.00% | +60,308+26.0% | Added |
| Arrowstreet Capital, Limited Partnership | 290,096 | $942.8K | 0.00% | +290,096 | New |
| Empowered Funds, LLC | 241,313 | $784.3K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 177,824 | $577.9K | 0.00% | +111,093+166.5% | Added |
| Vanguard Fiduciary Trust Co | 161,791 | $525.8K | 0.00% | −8,340−4.9% | Reduced |
| Round Rock Advisors, LLC | 152,841 | $496.7K | 0.06% | +152,841 | New |
| Morgan Stanley | 133,560 | $434.1K | 0.00% | −19,163−12.5% | Reduced |
| Centiva Capital, LP | 130,870 | $425.3K | 0.01% | +19,762+17.8% | Added |
| Gsa Capital Partners LLP | 129,547 | $421.0K | 0.03% | +115,638+831.4% | Added |
| Millennium Management LLC | 124,186 | $403.6K | 0.00% | +124,186 | New |
| Acadian Asset Management LLC | 122,050 | $396.0K | 0.00% | −82,055−40.2% | Reduced |
| Marquette Asset Management, LLC | 109,826 | $356.9K | 0.05% | +109,826 | New |
| Stifel Financial Corp | 105,572 | $343.1K | 0.00% | 00.0% | Unchanged |
| State Street Corp | 101,864 | $331.1K | 0.00% | −320,058−75.9% | Reduced |
| Bank of America Corp | 97,046 | $315.4K | 0.00% | +71,457+279.2% | Added |
| BNP Paribas Arbitrage, SA | 92,964 | $302.1K | 0.00% | +76,217+455.1% | Added |
| FNY Investment Advisers, LLC | 76,481 | $248.0K | 0.09% | +76,481 | New |
| Point72 Asset Management, L.P. | 72,091 | $234.3K | 0.00% | +72,091 | New |
| Boston Partners | 68,935 | $224.0K | 0.00% | −85,453−55.3% | Reduced |
| Aster Capital Management (DIFC) Ltd | 67,570 | $219.6K | 0.05% | +67,570 | New |
| Bank of New York Mellon Corp | 62,007 | $201.5K | 0.00% | −70,532−53.2% | Reduced |
| Qube Research & Technologies Ltd | 58,859 | $191.3K | 0.00% | +58,859 | New |
| Two Sigma Investments, LP | 58,538 | $190.2K | 0.00% | +58,538 | New |
| Northern Trust Corp | 57,180 | $185.8K | 0.00% | −129,948−69.4% | Reduced |
| Goldman Sachs Group Inc | 54,928 | $178.5K | 0.00% | −168,561−75.4% | Reduced |
| Susquehanna International Group, LLP | 49,920 | $162.2K | 0.00% | +13,621+37.5% | Added |
| XTX Topco Ltd | 49,261 | $160.1K | 0.00% | +49,261 | New |
| Walleye Capital LLC | 49,141 | $159.7K | 0.00% | +49,141 | New |
| Wellington Management Group LLP | 47,486 | $154.3K | 0.00% | −20,929−30.6% | Reduced |
| Algert Global LLC | 45,997 | $149.5K | 0.00% | +45,997 | New |
| Quadrature Capital Ltd | 44,015 | $143.0K | 0.00% | +44,015 | New |
| HSBC Holdings PLC | 33,706 | $108.0K | 0.00% | +33,706 | New |
| HRT Financial LP | 30,632 | $99.0K | 0.00% | +30,632 | New |
| UBS Group AG | 29,518 | $95.9K | 0.00% | +21,851+285.0% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 28,581 | $92.9K | 0.00% | +14,071+97.0% | Added |
| Captrust Financial Advisors | 26,799 | $87.1K | 0.00% | +26,799 | New |
| Barclays PLC | 25,553 | $83.0K | 0.00% | +19,972+357.9% | Added |
| Ieq Capital, LLC | 24,392 | $79.3K | 0.00% | +24,392 | New |
| Pathstone Holdings, LLC | 22,336 | $72.6K | 0.00% | +22,336 | New |
| Schonfeld Strategic Advisors LLC | 16,864 | $54.8K | 0.00% | −1,461−8.0% | Reduced |
| Rhumbline Advisers | 16,609 | $54.0K | 0.00% | −16,254−49.5% | Reduced |
| Archer Investment Corp | 16,400 | $53.3K | 0.01% | +5,200+46.4% | Added |
| Axq Capital, LP | 13,903 | $45.2K | 0.00% | +13,903 | New |
| Tower Research Capital LLC (TRC) | 13,477 | $43.8K | 0.00% | +955+7.6% | Added |
| Creative Planning | 13,317 | $43.3K | 0.00% | −3,633−21.4% | Reduced |
| Mariner, LLC | 13,287 | $43.1K | 0.00% | −13,586−50.6% | Reduced |
| Virtu Financial LLC | 12,793 | $42.0K | 0.00% | +12,793 | New |
| FMR LLC | 12,531 | $40.7K | 0.00% | +389+3.2% | Added |
| Steinberganna Wealth Management | 11,560 | $37.6K | 0.02% | −6,800−37.0% | Reduced |
| JPMorgan Chase & Co | 12,385 | $36.0K | 0.00% | +2,110+20.5% | Added |
| Prelude Capital Management, LLC | 10,800 | $35.1K | 0.00% | +10,800 | New |
| Charles Schwab Investment Management Inc | 10,739 | $34.9K | 0.00% | −48,122−81.8% | Reduced |
| Vanguard Global Advisers, LLC | 8,774 | $28.5K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 7,217 | $23.5K | 0.00% | +1,497+26.2% | Added |
| Royal Bank of Canada | 4,537 | $14.0K | 0.00% | +4,536+453,600.0% | Added |
| Simplex Trading, LLC | 3,457 | $11.2K | 0.00% | −2,081−37.6% | Reduced |
| UBS Asset Management Americas Inc | 1,416 | $4.60K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 843 | $2.74K | 0.00% | +826+4,858.8% | Added |
| Allworth Financial LP | 840 | $2.73K | 0.00% | +638+315.8% | Added |
| Allianz SE | 800 | $2.60K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 777 | $2.52K | 0.00% | +777 | New |
| Wells Fargo & Company | 300 | $975 | 0.00% | −9,169−96.8% | Reduced |
| EverSource Wealth Advisors, LLC | 276 | $898 | 0.00% | +192+228.6% | Added |
| Rothschild Investment LLC | 239 | $777 | 0.00% | +106+79.7% | Added |
| Essential Partners LLC | 212 | $689 | 0.00% | +192+960.0% | Added |
| McGuire Capital Advisors Inc | 200 | $650 | 0.00% | +200 | New |
| Westside Investment Management, Inc. | 187 | $608 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 150 | $487 | 0.00% | −72,269−99.8% | Reduced |
| Farther Finance Advisors, LLC | 107 | $343 | 0.00% | +93+664.3% | Added |
| Basecamp Wealth Advisors LLC | 79 | $257 | 0.00% | +22+38.6% | Added |
| True Wealth Design, LLC | 37 | $121 | 0.00% | +12+48.0% | Added |
| Transamerica Financial Advisors, Inc. | 31 | $100 | 0.00% | 00.0% | Unchanged |
| SJS Investment Consulting Inc. | 30 | $98 | 0.00% | +13+76.5% | Added |
| IFP Advisors, Inc | 27 | $88 | 0.00% | +22+440.0% | Added |
| Wealth Enhancement Trust Services, Inc. | 17 | $55 | 0.00% | +17 | New |
| Caitong International Asset Management Co., Ltd | 10 | $32 | 0.00% | +8+400.0% | Added |
| JPL Wealth Management, LLC | 9 | $30 | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 7 | $23 | 0.00% | +7 | New |
| Citigroup Inc | 1 | $3 | 0.00% | −1,126−99.9% | Reduced |
| SBI Securities Co., Ltd. | 1 | $3 | 0.00% | −100−99.0% | Reduced |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −163,259−100.0% | Sold out |
| Vanguard Portfolio Management LLC | 0 | $0 | 0.00% | −140,145−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −51,620−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −36,843−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −29,336−100.0% | Sold out |
| Levin Capital Strategies, L.P. | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| Verdad Advisers, LP | 0 | $0 | 0.00% | −22,729−100.0% | Sold out |