1 institutions reported holding $248,000 of MAMMOTH ENERGY SERVI ORD (TUSK) in SEC 13F filings for 2026-06-30. Largest institutional holders: FNY Investment Advisers, LLC ($248,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | FNY Investment Advisers, LLC | $248,000 | 76,481 | New |
Source: SEC Form 13F filings · as of 2026-06-30