MAMMOTH ENERGY SERVICES, INC. (TUSK) has 5 SEC Form 4 insider filings on record in the last 90 days. That includes 1 insider purchase totalling $10.5M. Most recent filing: July 1, 2026.
| Date | Insider | Value | Shares | Stake | Pre-planned | Links |
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| July 1, 2026 filed June 26, 2026 | Lancaster Phillip Director | $0 | 68,152 | +75% | No | |
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| June 22, 2026 filed June 17, 2026 | Jacobi Paul M. Chief Business Officer | $0 | 3,211 | +12% | No | |
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| June 22, 2026 filed June 17, 2026 | Amron Arthur H Director | $0 | 29,450 | — | No | |
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| June 22, 2026 filed June 17, 2026 | WEXFORD CAPITAL LP Chief Business Officer | +$10,468,177 | 11,447,137 | — | No | |
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| June 22, 2026 filed June 17, 2026 | DAVIDSON CHARLES E 10% Owner | $0 | 6,470,441 | — | No | |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
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