MAMMOTH ENERGY SERVICES INC (TUSK) Institutional Shareholders
MAMMOTH ENERGY SERVICES INC (TUSK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $84.61M in TUSK holdings during the latest filing period.
Wexford Capital Lp is currently the largest disclosed institutional shareholder of TUSK tracked by InsiderSet, reporting ownership valued at approximately $39.23M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $38.39M, representing an estimated loss of -2.15% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 82% of the total disclosed TUSK value among the investors covered in this analysis. Major shareholders include Wexford Capital Lp, Adage Capital Partners Gp, L.L.C., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in MAMMOTH ENERGY SERVICES INC (TUSK).
This page ranks the largest institutional TUSK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
89
Total Reported Value
$84.61M
Largest Holder
Wexford Capital Lp
Largest Position
$39.23M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
120
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Wexford Capital Lp | 5.38% | 12,071,823 | $39,233,425 | $38,388,397 | -$845,028 | -2.15% | |
| Adage Capital Partners Gp, L.L.C. | 0.02% | 4,575,000 | $14,868,750 | $14,548,500 | -$320,250 | -2.15% | |
| Vanguard Capital Management Llc | 0.00% | 1,059,603 | $3,443,710 | $3,369,538 | -$74,172 | -2.15% | |
| Peapod Lane Capital Llc | 1.77% | 807,804 | $2,625,363 | $2,568,817 | -$56,546 | -2.15% | |
| Dimensional Fund Advisors Lp | 0.00% | 691,667 | $2,247,249 | $2,199,501 | -$47,748 | -2.12% | |
| Jane Street Group, Llc | 0.00% | 506,662 | $1,646,651 | $1,611,185 | -$35,466 | -2.15% | |
| Citadel Advisors Llc | 0.00% | 452,163 | $1,469,530 | $1,437,878 | -$31,652 | -2.15% | |
| Blackrock, Inc. | 0.00% | 407,976 | $1,325,923 | $1,297,364 | -$28,559 | -2.15% | |
| Marshall Wace, Llp | 0.00% | 395,583 | $1,285,645 | $1,257,954 | -$27,691 | -2.15% | |
| Johns Hopkins University | 0.08% | 387,359 | $1,258,917 | $1,231,802 | -$27,115 | -2.15% | |
| Bridgeway Capital Management, Llc | 0.02% | 332,313 | $1,080,017 | $1,056,755 | -$23,262 | -2.15% | |
| Russell Investments Group, Ltd. | 0.00% | 329,821 | $1,071,918 | $1,048,831 | -$23,087 | -2.15% | |
| Geode Capital Management, Llc | 0.00% | 306,028 | $995,730 | $973,169 | -$22,561 | -2.27% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 292,280 | $949,910 | $929,450 | -$20,460 | -2.15% |
| Arrowstreet Capital, Limited Partnership | 0.00% | 290,096 | $942,812 | $922,505 | -$20,307 | -2.15% | |
| Empowered Funds, Llc | 0.00% | 241,313 | $784,267 | $767,375 | -$16,892 | -2.15% | |
| Aqr Capital Management Llc | 0.00% | 177,824 | $577,928 | $565,480 | -$12,448 | -2.15% | |
| Vanguard Fiduciary Trust Co | 0.00% | 161,791 | $525,821 | $514,495 | -$11,326 | -2.15% | |
| Round Rock Advisors Llc | 0.06% | 152,841 | $496,733 | $486,034 | -$10,699 | -2.15% | |
| Morgan Stanley | 0.00% | 133,560 | $434,070 | $424,721 | -$9,349 | -2.15% | |
| Centiva Capital, Lp | 0.01% | 130,870 | $425,328 | $416,167 | -$9,161 | -2.15% | |
| Gsa Capital Partners Llp | 0.03% | 129,547 | $421,000 | $411,959 | -$9,041 | -2.15% | |
| Millennium Management Llc | 0.00% | 124,186 | $403,604 | $394,911 | -$8,693 | -2.15% | |
| Acadian Asset Management Llc | 0.00% | 122,050 | $396,000 | $388,119 | -$7,881 | -1.99% | |
| Marquette Asset Management, Llc | 0.05% | 109,826 | $356,935 | $349,247 | -$7,688 | -2.15% | |
| Stifel Financial Corp | 0.00% | 105,572 | $343,109 | $335,719 | -$7,390 | -2.15% | |
| State Street Corp | 0.00% | 101,864 | $331,058 | $323,928 | -$7,130 | -2.15% | |
| Bank Of America Corp | 0.00% | 97,046 | $315,400 | $308,606 | -$6,794 | -2.15% | |
| Bnp Paribas Financial Markets | 0.00% | 92,964 | $302,133 | $295,626 | -$6,507 | -2.15% | |
| Fny Investment Advisers, Llc | 0.09% | 76,481 | $248,000 | $243,210 | -$4,790 | -1.93% | |
| Point72 Asset Management, L.P. | 0.00% | 72,091 | $234,296 | $229,249 | -$5,047 | -2.15% | |
| Boston Partners | 0.00% | 68,935 | $224,040 | $219,213 | -$4,827 | -2.15% | |
| Aster Capital Management (Difc) Ltd | 0.05% | 67,570 | $219,603 | $214,873 | -$4,730 | -2.15% | |
| Bank Of New York Mellon Corp | 0.00% | 62,007 | $201,523 | $197,182 | -$4,341 | -2.15% | |
| Qube Research & Technologies Ltd | 0.00% | 58,859 | $191,292 | $187,172 | -$4,120 | -2.15% | |
| Two Sigma Investments, Lp | 0.00% | 58,538 | $190,249 | $186,151 | -$4,098 | -2.15% | |
| Northern Trust Corp | 0.00% | 57,180 | $185,835 | $181,832 | -$4,003 | -2.15% | |
| Goldman Sachs Group Inc | 0.00% | 54,928 | $178,516 | $174,671 | -$3,845 | -2.15% | |
| Susquehanna International Group, Llp | 0.00% | 49,920 | $162,240 | $158,746 | -$3,494 | -2.15% | |
| Xtx Topco Ltd | 0.00% | 49,261 | $160,098 | $156,650 | -$3,448 | -2.15% | |
| Walleye Capital Llc | 0.00% | 49,141 | $159,708 | $156,268 | -$3,440 | -2.15% | |
| Wellington Management Group Llp | 0.00% | 47,486 | $154,330 | $151,005 | -$3,325 | -2.15% | |
| Algert Global Llc | 0.00% | 45,997 | $149,490 | $146,270 | -$3,220 | -2.15% | |
| Quadrature Capital Ltd | 0.00% | 44,015 | $143,049 | $139,968 | -$3,081 | -2.15% | |
| Hsbc Holdings Plc | 0.00% | 33,706 | $108,028 | $107,185 | -$843 | -0.78% | |
| Hrt Financial Lp | 0.00% | 30,632 | $99,000 | $97,410 | -$1,590 | -1.61% | |
| Ubs Group Ag | 0.00% | 29,518 | $95,933 | $93,867 | -$2,066 | -2.15% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 28,581 | $92,888 | $90,888 | -$2,000 | -2.15% | |
| Captrust Financial Advisors | 0.00% | 26,799 | $87,097 | $85,221 | -$1,876 | -2.15% | |
| Barclays Plc | 0.00% | 25,553 | $83,048 | $81,259 | -$1,789 | -2.15% |
Frequently asked questions about TUSK
Who owns the most TUSK stock?
The largest holders of TUSK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MAMMOTH ENERGY SERVICES INC (TUSK).
Is TUSK widely held by superinvestors?
Many widely followed stocks like TUSK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly TUSK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.