Who Owns MAMMOTH ENERGY SVCS INC (TUSK)? -- Institutional Holders (2026-06-30)
115 institutions reported holding $85.2M of MAMMOTH ENERGY SVCS INC (TUSK) in SEC 13F filings for 2026-06-30. Largest institutional holders: WEXFORD CAPITAL LP ($39.2M), ADAGE CAPITAL PARTNERS GP, L.L.C. ($14.9M), VANGUARD GROUP INC ($4.0M), Peapod Lane Capital LLC ($2.6M), DIMENSIONAL FUND ADVISORS LP ($2.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | WEXFORD CAPITAL LP | $39.2M | 12.1M | Trimmed |
| 2 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $14.9M | 4.6M | Hold |
| 3 | VANGUARD GROUP INC | $4.0M | 1.2M | Added |
| 4 | Peapod Lane Capital LLC | $2.6M | 807,804 | Added |
| 5 | DIMENSIONAL FUND ADVISORS LP | $2.2M | 691,667 | Added |
| 6 | CITADEL ADVISORS LLC | $1.9M | 593,263 | Added |
| 7 | JANE STREET GROUP, LLC | $1.6M | 506,662 | Added |
| 8 | BlackRock, Inc. | $1.3M | 407,976 | Trimmed |
| 9 | MARSHALL WACE, LLP | $1.3M | 395,583 | New |
| 10 | Johns Hopkins University | $1.3M | 387,359 | New |
| 11 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.1M | 332,313 | Hold |
| 12 | Russell Investments Group, Ltd. | $1.1M | 329,821 | Added |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $995,730 | 306,028 | Trimmed |
| 14 | RENAISSANCE TECHNOLOGIES LLC | $949,910 | 292,280 | Added |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $942,812 | 290,096 | New |
| 16 | Empowered Funds, LLC | $784,267 | 241,313 | Hold |
| 17 | AQR CAPITAL MANAGEMENT LLC | $577,928 | 177,824 | Added |
| 18 | Round Rock Advisors, LLC | $496,733 | 152,841 | New |
| 19 | MORGAN STANLEY | $434,070 | 133,560 | Trimmed |
| 20 | Centiva Capital, LP | $425,328 | 130,870 | Added |
| 21 | GSA CAPITAL PARTNERS LLP | $421,000 | 129,547 | Added |
| 22 | MILLENNIUM MANAGEMENT LLC | $403,604 | 124,186 | New |
| 23 | ACADIAN ASSET MANAGEMENT LLC | $396,000 | 122,050 | Trimmed |
| 24 | Marquette Asset Management, LLC | $356,935 | 109,826 | New |
| 25 | STIFEL FINANCIAL CORP | $343,109 | 105,572 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30