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
- −8.99M (−25.6%) vs. Q1 2026
- Total value
- $84.7M
- −$1.23M (−1.4%) vs. Q1 2026
- New holders
- 27
- 32 more added
- Sold out
- 23
- 24 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 | $63.6M |
| 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 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 |
|---|---|---|---|---|---|
| Citigroup Inc | 1 | $3 | 0.00% | −1,126−99.9% | Reduced |
| SBI Securities Co., Ltd. | 1 | $3 | 0.00% | −100−99.0% | Reduced |
| Fortitude Family Office, LLC | 7 | $23 | 0.00% | +7 | New |
| JPL Wealth Management, LLC | 9 | $30 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 10 | $32 | 0.00% | +8+400.0% | Added |
| Wealth Enhancement Trust Services, Inc. | 17 | $55 | 0.00% | +17 | New |
| IFP Advisors, Inc | 27 | $88 | 0.00% | +22+440.0% | Added |
| SJS Investment Consulting Inc. | 30 | $98 | 0.00% | +13+76.5% | Added |
| Transamerica Financial Advisors, Inc. | 31 | $100 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 37 | $121 | 0.00% | +12+48.0% | Added |
| Basecamp Wealth Advisors LLC | 79 | $257 | 0.00% | +22+38.6% | Added |
| Farther Finance Advisors, LLC | 107 | $343 | 0.00% | +93+664.3% | Added |
| Advisor Group Holdings, Inc. | 150 | $487 | 0.00% | −72,269−99.8% | Reduced |
| Westside Investment Management, Inc. | 187 | $608 | 0.00% | 00.0% | Unchanged |
| McGuire Capital Advisors Inc | 200 | $650 | 0.00% | +200 | New |
| Essential Partners LLC | 212 | $689 | 0.00% | +192+960.0% | Added |
| Rothschild Investment LLC | 239 | $777 | 0.00% | +106+79.7% | Added |
| EverSource Wealth Advisors, LLC | 276 | $898 | 0.00% | +192+228.6% | Added |
| Wells Fargo & Company | 300 | $975 | 0.00% | −9,169−96.8% | Reduced |
| Group One Trading, L.P. | 777 | $2.52K | 0.00% | +777 | New |
| Allianz SE | 800 | $2.60K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 840 | $2.73K | 0.00% | +638+315.8% | Added |
| SRS Capital Advisors, Inc. | 843 | $2.74K | 0.00% | +826+4,858.8% | Added |
| UBS Asset Management Americas Inc | 1,416 | $4.60K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 3,457 | $11.2K | 0.00% | −2,081−37.6% | Reduced |
| Royal Bank of Canada | 4,537 | $14.0K | 0.00% | +4,536+453,600.0% | Added |
| The PNC Financial Services Group, Inc. | 7,217 | $23.5K | 0.00% | +1,497+26.2% | Added |
| Archer Investment Corp | 8,200 | $26.6K | 0.01% | −3,000−26.8% | Reduced |
| Vanguard Global Advisers, LLC | 8,774 | $28.5K | 0.00% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 10,739 | $34.9K | 0.00% | −48,122−81.8% | Reduced |
| Prelude Capital Management, LLC | 10,800 | $35.1K | 0.00% | +10,800 | New |
| JPMorgan Chase & Co | 12,385 | $36.0K | 0.00% | +2,110+20.5% | Added |
| Steinberganna Wealth Management | 11,560 | $37.6K | 0.02% | −6,800−37.0% | Reduced |
| FMR LLC | 12,531 | $40.7K | 0.00% | +389+3.2% | Added |
| Virtu Financial LLC | 12,793 | $42.0K | 0.00% | +12,793 | New |
| Mariner, LLC | 13,287 | $43.1K | 0.00% | −13,586−50.6% | Reduced |
| Creative Planning | 13,317 | $43.3K | 0.00% | −3,633−21.4% | Reduced |
| Tower Research Capital LLC (TRC) | 13,477 | $43.8K | 0.00% | +955+7.6% | Added |
| Axq Capital, LP | 13,903 | $45.2K | 0.00% | +13,903 | New |
| Rhumbline Advisers | 16,609 | $54.0K | 0.00% | −16,254−49.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 16,864 | $54.8K | 0.00% | −1,461−8.0% | Reduced |
| Pathstone Holdings, LLC | 22,336 | $72.6K | 0.00% | +22,336 | New |
| Ieq Capital, LLC | 24,392 | $79.3K | 0.00% | +24,392 | New |
| Barclays PLC | 25,553 | $83.0K | 0.00% | +19,972+357.9% | Added |
| Captrust Financial Advisors | 26,799 | $87.1K | 0.00% | +26,799 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 28,581 | $92.9K | 0.00% | +14,071+97.0% | Added |
| UBS Group AG | 29,518 | $95.9K | 0.00% | +21,851+285.0% | Added |
| HRT Financial LP | 30,632 | $99.0K | 0.00% | +30,632 | New |
| HSBC Holdings PLC | 33,706 | $108.0K | 0.00% | +33,706 | New |
| Quadrature Capital Ltd | 44,015 | $143.0K | 0.00% | +44,015 | New |
| Algert Global LLC | 45,997 | $149.5K | 0.00% | +45,997 | New |
| Wellington Management Group LLP | 47,486 | $154.3K | 0.00% | −20,929−30.6% | Reduced |
| Walleye Capital LLC | 49,141 | $159.7K | 0.00% | +49,141 | New |
| XTX Topco Ltd | 49,261 | $160.1K | 0.00% | +49,261 | New |
| Susquehanna International Group, LLP | 49,920 | $162.2K | 0.00% | +13,621+37.5% | Added |
| Goldman Sachs Group Inc | 54,928 | $178.5K | 0.00% | −168,561−75.4% | Reduced |
| Northern Trust Corp | 57,180 | $185.8K | 0.00% | −129,948−69.4% | Reduced |
| Two Sigma Investments, LP | 58,538 | $190.2K | 0.00% | +58,538 | New |
| Qube Research & Technologies Ltd | 58,859 | $191.3K | 0.00% | +58,859 | New |
| Bank of New York Mellon Corp | 62,007 | $201.5K | 0.00% | −70,532−53.2% | Reduced |
| Aster Capital Management (DIFC) Ltd | 67,570 | $219.6K | 0.05% | +67,570 | New |
| Boston Partners | 68,935 | $224.0K | 0.00% | −85,453−55.3% | Reduced |
| Point72 Asset Management, L.P. | 72,091 | $234.3K | 0.00% | +72,091 | New |
| FNY Investment Advisers, LLC | 76,481 | $248.0K | 0.09% | +76,481 | New |
| BNP Paribas Arbitrage, SA | 92,964 | $302.1K | 0.00% | +76,217+455.1% | Added |
| Bank of America Corp | 97,046 | $315.4K | 0.00% | +71,457+279.2% | Added |
| State Street Corp | 101,864 | $331.1K | 0.00% | −320,058−75.9% | Reduced |
| Stifel Financial Corp | 105,572 | $343.1K | 0.00% | 00.0% | Unchanged |
| Marquette Asset Management, LLC | 109,826 | $356.9K | 0.05% | +109,826 | New |
| Acadian Asset Management LLC | 122,050 | $396.0K | 0.00% | −82,055−40.2% | Reduced |
| Millennium Management LLC | 124,186 | $403.6K | 0.00% | +124,186 | New |
| Gsa Capital Partners LLP | 129,547 | $421.0K | 0.03% | +115,638+831.4% | Added |
| Centiva Capital, LP | 130,870 | $425.3K | 0.01% | +19,762+17.8% | Added |
| Morgan Stanley | 133,560 | $434.1K | 0.00% | −19,163−12.5% | Reduced |
| Round Rock Advisors, LLC | 152,841 | $496.7K | 0.06% | +152,841 | New |
| Vanguard Fiduciary Trust Co | 161,791 | $525.8K | 0.00% | −8,340−4.9% | Reduced |
| AQR Capital Management LLC | 177,824 | $577.9K | 0.00% | +111,093+166.5% | Added |
| Empowered Funds, LLC | 241,313 | $784.3K | 0.00% | 00.0% | Unchanged |
| Arrowstreet Capital, Limited Partnership | 290,096 | $942.8K | 0.00% | +290,096 | New |
| Renaissance Technologies LLC | 292,280 | $949.9K | 0.00% | +60,308+26.0% | Added |
| Geode Capital Management, LLC | 306,028 | $995.7K | 0.00% | −304,898−49.9% | Reduced |
| Russell Investments Group, Ltd. | 329,821 | $1.07M | 0.00% | +261,791+384.8% | Added |
| Bridgeway Capital Management, LLC | 332,313 | $1.08M | 0.02% | 00.0% | Unchanged |
| Johns Hopkins University | 387,359 | $1.26M | 0.08% | +387,359 | New |
| Marshall Wace, LLP | 395,583 | $1.29M | 0.00% | +395,583 | New |
| BlackRock, Inc. | 407,976 | $1.33M | 0.00% | −1,046,863−72.0% | Reduced |
| Citadel Advisors LLC | 452,163 | $1.47M | 0.00% | +120,796+36.5% | Added |
| Jane Street Group, LLC | 506,662 | $1.65M | 0.00% | +483,808+2,117.0% | Added |
| Dimensional Fund Advisors LP | 691,667 | $2.25M | 0.00% | +5,468+0.8% | Added |
| Peapod Lane Capital LLC | 807,804 | $2.63M | 1.77% | +207,999+34.7% | Added |
| Vanguard Capital Management LLC | 1,059,603 | $3.44M | 0.00% | +240,483+29.4% | Added |
| Adage Capital Partners GP, L.L.C. | 4,575,000 | $14.9M | 0.02% | 00.0% | Unchanged |
| Wexford Capital LP | 12,071,823 | $39.2M | 5.38% | −9,996,389−45.3% | 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 |