🕵️ Mammoth Energy Services, Inc. ($TUSK)
SEC insider & ownership activity, last 12 months · CIK 1679268 · every row links its SEC filing
Over the last 12 months insiders bought $10.5M with no open-market selling against it. Wexford Capital LP bought $10.5M in discretionary trades (Jun). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $10.5M (6 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Wexford Capital LP | 1 | $10.5M | 0 | – | Jun 17, 2026 |
| Arthur H. Amron | 5 | $51K | 0 | – | Jun 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Wexford Capital LP | 25.1% | 13G | Jun 22, 2026 | filing ↗ | |
| Wexford GP LLC | 25.1% | 13G | Jun 22, 2026 | filing ↗ | |
| Joseph M. Jacobs | 25.1% | 13G | Jun 22, 2026 | filing ↗ | |
| Charles E. Davidson | 13.4% | 13G | Jun 22, 2026 | filing ↗ | |
| CD Holding Company, LLC | 8.4% | 13G | Jun 22, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Arthur L. Smith | $231K | Aug 12, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 25, 2026 | filing ↗ |
| Auditor change (4.01) | May 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 13, 2026 | filing ↗ |
| Earnings (2.02) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Earnings (2.02) | Mar 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 6, 2026 | filing ↗ |
| Material agreement (1.01) | Dec 2, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Dec 2, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 2, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 2, 2025 | filing ↗ |
| Earnings (2.02) | Oct 31, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 31, 2025 | filing ↗ |
| Earnings (2.02) | Aug 8, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 8, 2025 | filing ↗ |