TUSK Institutional Ownership & Shareholders
MAMMOTH ENERGY SERVICES INC (TUSK) is currently held by 84 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $83.53M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 83% 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
84
Total Reported Value
$83.53M
Largest Holder
Wexford Capital Lp
Largest Position
$39.23M
Insider Transactions (90d)
1
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% | |
| Dimensional Fund Advisors Lp | 0.00% | 691,667 | $2,247,249 | $2,199,501 | -$47,748 | -2.12% | |
| Peapod Lane Capital Llc | 1.61% | 758,985 | $2,155,517 | $2,413,572 | +$258,055 | +11.97% | |
| 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% | |
| 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% | |
| 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% | |
| Ieq Capital, Llc | 0.00% | 24,392 | $79,274 | $77,567 | -$1,707 | -2.15% | |
| Schonfeld Strategic Advisors Llc | 0.00% | 16,864 | $54,807 | $53,628 | -$1,179 | -2.15% |
Frequently asked questions about TUSK
Who are the largest institutional holders of TUSK?
The largest institutional holders of TUSK reported in the latest SEC Form 13F filings include Wexford Capital Lp, Adage Capital Partners Gp, L.L.C., Vanguard Capital Management Llc, Dimensional Fund Advisors Lp, and Peapod Lane Capital Llc. InsiderSet ranks institutional holders by their latest reported TUSK position.
What is TUSK institutional ownership?
This page tracks TUSK positions reported by institutional investment managers through SEC Form 13F. MAMMOTH ENERGY SERVICES INC (TUSK) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own TUSK?
InsiderSet currently tracks 84 institutional managers reporting TUSK holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of TUSK shareholders.
How much TUSK stock do institutions own?
Institutional investment managers disclosed approximately $83.53M in TUSK holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was TUSK institutional ownership last updated?
The latest TUSK institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional TUSK holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its TUSK position after the reporting date.
Are institutions buying or selling TUSK?
Institutional buying and selling can be analyzed by comparing TUSK positions across consecutive 13F reporting periods. InsiderSet's TUSK Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View TUSK ownership changes.
How has TUSK institutional ownership changed over time?
InsiderSet tracks TUSK institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.