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Mammoth Energy Services, Inc. (NASDAQ:TUSK)
US · Delayed Price · Currency is USD
2.69+0.02 (+0.75%)
Market cap
$129M
Insider Score
Analyst consensus
Listed since
Oct 14, 2016
Website
Insider Score
/ 100
TUSK Insider Score
MAMMOTH ENERGY SERVICES, INC. has a live Insider Score.
Scored on 1 qualifying trade from 1 insider in the last 90 days.
TUSK Stock Insider Trading Activity
TUSK stock’s insider trading shows 6 purchases for an estimated $10.50M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days1 qualifying buy1 insider$15.00K bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Plaumann Mark Lawrence Director | Buy | 5,000 | $3.00 | $15.00K | New | 5,000 | Sep 16, 2026 | BFirst Buy | Form 4 |
| Lancaster Phillip Director | Other | 68,152 | — | — | 74.7% | 159,445 | Jun 26, 2026 | — | Form 4 |
| Amron Holdings LLC Director | Other | 10,329 | — | — | New | 10,329 | Jun 17, 2026 | — | Form 4 |
| Amron Holdings LLC Director | Other | 19,121 | — | — | 28.5% | 86,256 | Jun 17, 2026 | — | Form 4 |
| Wexford GP LLC Director | Other | 6,354,667 | — | — | 2577% | 6,601,215 | Jun 17, 2026 | — | Form 4 |
| Wexford GP LLC Director | Buy | 4,019,574 | $2.60 | $10.45M | 60.9% | 10,620,789 | Jun 17, 2026 | A+First BuyExec Buy | Form 4 |
| Wexford GP LLC Director | Other | 1,072,896 | — | — | 284% | 1,451,034 | Jun 17, 2026 | — | Form 4 |
| CD Holding Company, LLC Other | Other | 2,403,831 | — | — | New | 2,403,831 | Jun 17, 2026 | — | Form 4 |
| CD Holding Company, LLC Other | Other | 4,066,610 | — | — | New | 4,066,610 | Jun 17, 2026 | — | Form 4 |
| Jacobi Paul M. Director | Other | 3,211 | — | — | 11.5% | 31,067 | Jun 17, 2026 | — | Form 4 |
| Amron Arthur H Director | Buy | 2,000 | $3.28 | $6.56K | 3.1% | 67,135 | Jun 12, 2026 | D | Form 4 |
| Amron Arthur H Director | Buy | 2,500 | $3.22 | $8.05K | 4.0% | 65,135 | Jun 11, 2026 | D | Form 4 |
| Amron Arthur H Director | Buy | 3,000 | $3.25 | $9.75K | 5.0% | 62,635 | May 28, 2026 | D | Form 4 |
| Amron Arthur H Director | Buy | 2,500 | $3.24 | $8.10K | 4.4% | 59,635 | May 26, 2026 | D | Form 4 |
| Amron Arthur H Director | Buy | 10,000 | $1.89 | $18.90K | 21.2% | 57,135 | Dec 11, 2025 | CFirst Buy | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Other (J) — Other acquisition or disposition — the filing explains it in a footnote
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.