TUSK · Mammoth Energy Services, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 93 13F filersWho Holds TUSK
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 93 filers, like-for-like change -25.6%; actively managed books -23.1%; index-like books -43.8%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 85.6% | 48 | -29.1% |
| Exempt adviser | 1.7% | 2 | new |
| Bank | 1.5% | 11 | -50.7% |
| Broker-dealer | 0.0% | 1 | new |
| Non-US | 0.4% | 2 | +451.8% |
| Holding company | 2.5% | 6 | -66.9% |
| Adviser | 0.0% | 0 | — |
| Benefit plan | 0.0% | 0 | — |
| Insurer | 0.0% | 0 | — |
| Unknown | 8.2% | 23 | +177.9% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 9.2% | 12 | -43.8% |
| Systematic-like | 6.1% | 16 | +247.7% |
| Concentrated | 48.3% | 11 | -43.0% |
| Diversified active | 36.4% | 54 | +15.0% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 11.7% | 40 | -32.0% |
| Medium turnover | 28.2% | 21 | +9.6% |
| High turnover | 55.4% | 25 | -36.4% |
| Unknown | 4.8% | 7 | +5.3% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 6.0% | 14 | +27.5% |
| Medium horizon | 7.7% | 13 | -19.6% |
| Long horizon | 36.9% | 54 | +3.9% |
| Unknown | 49.4% | 12 | -41.6% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 52.6% | 20 | -39.7% |
| $1B to $10B | 2.8% | 16 | +36.7% |
| $10B to $100B | 23.1% | 20 | +6.5% |
| $100B or more | 21.5% | 37 | -8.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.8% | 19 | +165.2% |
| Pooled investment vehicles | 70.2% | 15 | -33.3% |
| Registered funds and BDCs | 10.4% | 7 | -11.3% |
| Pension and profit sharing plans | 0.1% | 1 | new |
| Governments and sovereign funds | 3.3% | 3 | +37.6% |
| Diversified | 0.8% | 3 | -19.3% |
| Insurance companies | 0.0% | 0 | -100.0% |
| Unknown | 14.4% | 45 | +4.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 72.9% | 18 | -31.7% |
| Private equity funds | 0.1% | 2 | -39.3% |
| Venture capital funds | 0.0% | 1 | +79.7% |
| Real estate funds | 0.0% | 3 | +318.6% |
| Securitized asset funds | 0.0% | 1 | 0.0% |
| Other private funds | 4.3% | 5 | +1.8% |
| Private funds, type not stated | 0.1% | 1 | new |
| No private funds | 10.1% | 19 | +5.1% |
| Mixed private funds | 0.0% | 0 | -100.0% |
| Unknown | 12.6% | 43 | -8.1% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 96.7% | 79 | -28.0% |
| Outside the US | 3.3% | 14 | +1408.2% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-06-30 13F.
Conviction and Crowding
93 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 40.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies TUSK's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not TUSK, quarter ended Jun 30, 2026Found through its holder-overlap peers: APH, AMZN, MSFT, GOOGL, LLY, AVGO, META, NVDA. 7,025 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active | $365,757,983,153 8 held | NVDA, GOOGL, MSFT |
| 2 | NORGES BANK Non-US, Index-like | $256,274,073,204 8 held | NVDA, GOOGL, MSFT |
| 3 | PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active | $254,996,025,326 8 held | NVDA, GOOGL, MSFT |
| 4 | Invesco Ltd. Adviser, Diversified active | $248,754,173,367 8 held | NVDA, GOOGL, MSFT |
| 5 | Capital Research Global Investors Adviser, Diversified active | $244,495,276,723 8 held | AVGO, NVDA, GOOGL |
| 6 | Capital World Investors Adviser, Diversified active | $190,370,383,678 8 held | AVGO, GOOGL, META |
| 7 | Capital International Investors Adviser, Diversified active | $136,526,020,997 8 held | AVGO, GOOGL, MSFT |
| 8 | Legal & General Group Plc Unknown, Index-like | $115,774,427,616 8 held | NVDA, GOOGL, MSFT |
| 9 | LILLY ENDOWMENT INC Unknown, Unknown | $108,400,867,760 1 held | LLY |
| 10 | Nuveen, LLC Unknown, Index-like | $105,784,444,477 8 held | NVDA, GOOGL, MSFT |
Fund Ownership of TUSK by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 3.96% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 1.29% | 622,773 |
| Index ETFs | 2.67% | 1,284,633 |
| Active ETFs | 0.90% | 435,521 |
| Active funds | 1.59% | 764,172 |
| Unclassified | 0.01% | 3,873 |
| All registered funds | 6.46% | 3,110,972 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Small WEXFORD CAPITAL LP Registered adviser | $39,233,424 | 46.39% | 12,071,823 | Shares | 2026-08-14 | |
| Large ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser | $14,868,750 | 17.58% | 4,575,000 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $3,443,709 | 4.07% | 1,059,603 | Shares | 2026-08-13 | |
| Small Peapod Lane Capital LLC Registered adviser | $2,625,363 | 3.10% | 807,804 | Shares | 2026-07-27 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $2,247,917 | 2.66% | 691,667 | Shares | 2026-08-11 | |
| Mega JANE STREET GROUP, LLC | $1,646,651 | 1.95% | 506,662 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,469,529 | 1.74% | 452,163 | Shares | 2026-09-02 | |
| Mega BlackRock, Inc. Holding company | $1,325,920 | 1.57% | 407,976 | Shares | 2026-08-07 | |
| Large MARSHALL WACE, LLP Exempt adviser | $1,285,644 | 1.52% | 395,583 | Shares | 2026-08-13 | |
| Small Johns Hopkins University | $1,258,916 | 1.49% | 387,359 | Shares | 2026-08-14 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC Registered adviser | $1,080,017 | 1.28% | 332,313 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $1,071,916 | 1.27% | 329,821 | Shares | 2026-08-06 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $994,591 | 1.18% | 306,028 | Shares | 2026-08-12 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $949,910 | 1.12% | 292,280 | Shares | 2026-08-13 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $942,812 | 1.11% | 290,096 | Shares | 2026-08-13 | |
| Large Empowered Funds, LLC Registered adviser | $784,267 | 0.93% | 241,313 | Shares | 2026-08-17 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $577,926 | 0.68% | 177,824 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $525,820 | 0.62% | 161,791 | Shares | 2026-08-13 | |
| Small Round Rock Advisors LLC Registered adviser | $496,733 | 0.59% | 152,841 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $458,575 | 0.54% | 141,100 | Call | 2026-09-02 | |
| Mega MORGAN STANLEY Holding company | $434,068 | 0.51% | 133,560 | Shares | 2026-08-13 | |
| Large Centiva Capital, LP Registered adviser | $425,327 | 0.50% | 130,870 | Shares | 2026-08-13 | |
| Mid GSA CAPITAL PARTNERS LLP Registered adviser | $421,027 | 0.50% | 129,547 | Shares | 2026-08-06 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $403,604 | 0.48% | 124,186 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $396,662 | 0.47% | 122,050 | Shares | 2026-08-13 | |
| Mega STIFEL FINANCIAL CORP | $343,109 | 0.41% | 105,572 | Shares | 2026-08-12 | |
| Mega STATE STREET CORP Bank | $331,058 | 0.39% | 101,864 | Shares | 2026-09-22 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $315,399 | 0.37% | 97,046 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $302,133 | 0.36% | 92,964 | Shares | 2026-08-13 | |
| Large Point72 Asset Management, L.P. Registered adviser | $234,295 | 0.28% | 72,091 | Shares | 2026-08-14 | |
| Mega Boston Partners Registered adviser | $224,038 | 0.26% | 68,935 | Shares | 2026-08-04 | |
| Small Aster Capital Management (DIFC) Ltd | $219,602 | 0.26% | 67,570 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $201,522 | 0.24% | 62,007 | Shares | 2026-08-06 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $191,291 | 0.23% | 58,859 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $190,248 | 0.22% | 58,538 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $185,834 | 0.22% | 57,180 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $178,516 | 0.21% | 54,928 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $162,240 | 0.19% | 49,920 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $160,098 | 0.19% | 49,261 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $159,708 | 0.19% | 49,141 | Shares | 2026-08-03 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $154,329 | 0.18% | 47,486 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $149,490 | 0.18% | 45,997 | Shares | 2026-08-13 | |
| Large Quadrature Capital Ltd | $143,048 | 0.17% | 44,015 | Shares | 2026-08-07 | |
| Mega HSBC HOLDINGS PLC | $109,544 | 0.13% | 33,706 | Shares | 2026-08-14 | |
| Large HRT FINANCIAL LP | $99,554 | 0.12% | 30,632 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $95,933 | 0.11% | 29,518 | Shares | 2026-08-13 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $92,888 | 0.11% | 28,581 | Shares | 2026-08-13 | |
| Large CAPTRUST FINANCIAL ADVISORS Registered adviser | $87,096 | 0.10% | 26,799 | Shares | 2026-08-13 | |
| Mega BARCLAYS PLC Bank | $83,046 | 0.10% | 25,553 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $79,274 | 0.09% | 24,392 | Shares | 2026-08-11 | |
| Large Pathstone Holdings, LLC | $72,592 | 0.09% | 22,336 | Shares | 2026-08-13 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $54,808 | 0.06% | 16,864 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $53,979 | 0.06% | 16,609 | Shares | 2026-08-12 | |
| Small AXQ CAPITAL, LP Registered adviser | $45,184 | 0.05% | 13,903 | Shares | 2026-08-06 | |
| Mid Tower Research Capital LLC (TRC) | $43,800 | 0.05% | 13,477 | Shares | 2026-08-11 | |
| Mega Creative Planning Registered adviser | $43,280 | 0.05% | 13,317 | Shares | 2026-08-13 | |
| Large Mariner, LLC Registered adviser | $43,182 | 0.05% | 13,287 | Shares | 2026-08-13 | |
| Mid Virtu Financial LLC | $41,577 | 0.05% | 12,793 | Shares | 2026-08-13 | |
| Mega FMR LLC Holding company | $40,725 | 0.05% | 12,531 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $40,251 | 0.05% | 12,385 | Shares | 2026-08-12 | |
| Small STEINBERGANNA WEALTH MANAGEMENT | $37,570 | 0.04% | 11,560 | Shares | 2026-08-04 | |
| Mid PRELUDE CAPITAL MANAGEMENT, LLC Registered adviser | $35,100 | 0.04% | 10,800 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $34,901 | 0.04% | 10,739 | Shares | 2026-08-14 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $28,515 | 0.03% | 8,774 | Shares | 2026-08-13 | |
| Small Archer Investment Corp Registered adviser | $26,650 | 0.03% | 8,200 | Shares | 2026-08-19 | |
| Mega PNC FINANCIAL SERVICES GROUP, INC. Bank | $23,454 | 0.03% | 7,217 | Shares | 2026-08-07 | |
| Mega ROYAL BANK OF CANADA Bank | $14,745 | 0.02% | 4,537 | Shares | 2026-08-14 | |
| Mid SIMPLEX TRADING, LLC | $11,235 | 0.01% | 3,457 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $4,602 | 0.01% | 1,416 | Shares | 2026-08-13 | |
| Large Arax Advisory Partners Registered adviser | $2,739 | 0.00% | 843 | Shares | 2026-08-10 | |
| Large Allworth Financial LP | $2,730 | 0.00% | 840 | Shares | 2026-08-11 | |
| Mid Allianz SE | $2,600 | 0.00% | 800 | Shares | 2026-08-10 | |
| Mid GROUP ONE TRADING LLC Broker-dealer | $2,525 | 0.00% | 777 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $975 | 0.00% | 300 | Shares | 2026-08-14 | |
| Mid EverSource Wealth Advisors, LLC Registered adviser | $895 | 0.00% | 276 | Shares | 2026-07-24 | |
| Mid ROTHSCHILD INVESTMENT LLC Registered adviser | $776 | 0.00% | 239 | Shares | 2026-08-06 | |
| Small MCGUIRE CAPITAL ADVISORS INC Registered adviser | $650 | 0.00% | 200 | Shares | 2026-08-14 | |
| Small Westside Investment Management, Inc. Registered adviser | $607 | 0.00% | 187 | Shares | 2026-07-27 | |
| Large OSAIC HOLDINGS, INC. Holding company | $487 | 0.00% | 150 | Shares | 2026-08-14 | |
| Small Basecamp Wealth Advisors LLC Registered adviser | $256 | 0.00% | 79 | Shares | 2026-08-14 | |
| Mid Transamerica Financial Advisors, LLC Registered adviser | $100 | 0.00% | 31 | Shares | 2026-08-17 | |
| Small SJS Investment Consulting Inc. Registered adviser | $97 | 0.00% | 30 | Shares | 2026-07-22 | |
| Small Essential Partners LLC Registered adviser | $48 | 0.00% | 17 | Shares | 2026-10-14 | |
| Small Caitong International Asset Management Co., Ltd | $32 | 0.00% | 10 | Shares | 2026-08-05 | |
| Small JPL Wealth Management, LLC Registered adviser | $29 | 0.00% | 9 | Shares | 2026-08-14 | |
| Mid IFP Advisors, Inc Registered adviser | $11 | 0.00% | 4 | Shares | 2026-10-16 | |
| Mid SBI Securities Co., Ltd. Non-US | $3 | 0.00% | 1 | Shares | 2026-07-23 | |
| Mega CITIGROUP INC Bank | $3 | 0.00% | 1 | Shares | 2026-08-03 | |
| Large Farther Finance Advisors, LLC Registered adviser | $2 | 0.00% | 1 | Shares | 2026-10-08 |