Company · CIK 0001679268 · SIC 1389 — Oil & Gas Field Services, NEC · Nasdaq
MAMMOTH ENERGY SERVICES, INC. · TUSK
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 PForm 4 → | Sep 17, 4:50 pm EDT | Mark Lawrence PlaumannDirector | 5,000 | $3.00 | $15,000 | 5,000 | — | |
| Jun 26, 2026 JForm 4 → | Jul 1, 4:56 pm EDT | Phillip LancasterDirector | 68,152 | — | — | 159,445 | — | late |
| Jun 17, 2026 JForm 4 → | Jun 22, 4:42 pm EDT | Paul M. JacobiChief Business Officer, Director | 3,211 | — | — | 31,067 | — | |
| Jun 17, 2026 JForm 4 → | Jun 22, 4:32 pm EDT | Arthur H Amron +1Director | 29,450 | — | — | 10,329 | — | |
| Jun 17, 2026 PForm 4 → | Jun 22, 4:26 pm EDT | WEXFORD CAPITAL LP +3Chief Business Officer, Director, 10% Owner | 4,019,574 | $2.60 | $10,468,177 | 10,620,789 | +60.9% | |
| Jun 17, 2026 JForm 4 → | Jun 22, 4:26 pm EDT | WEXFORD CAPITAL LP +3Chief Business Officer, Director, 10% Owner | 7,427,563 | — | — | 6,601,215 | — | |
| Jun 17, 2026 JForm 4 → | Jun 22, 4:18 pm EDT | Charles E Davidson +110% Owner | 6,470,441 | — | — | 4,066,610 | — | |
| Jun 11, 2026 PForm 4 → | Jun 15, 4:28 pm EDT | Arthur H AmronDirector | 4,500 | $3.25 | $14,610 | 67,135 | +7.18% |
Reported at this company — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.