MAMMOTH ENERGY SERVICES, INC. (TUSK) insider trading
MAMMOTH ENERGY SERVICES, INC. insiders have made 1 open-market purchase worth $15k since Sep 17, 2026, by 1 insider. The latest: Mark Lawrence Plaumann (Director) bought $15k, filed Sep 17, 2026, scored 44 out of 100.
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Insider purchases
| Filed | Insider | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Sep 17 Form 4 (opens sec.gov) |
Mark Lawrence PlaumannDirectorDirector | New position | 44 | $15k 5,000 at $3.00 |
— | — |
Insiders who bought TUSK
- Mark Lawrence Plaumann Director
Questions
Are insiders buying TUSK stock?
Yes. In the last 90 days, 1 open-market purchase was filed, worth $15k.
Who bought TUSK stock most recently?
Mark Lawrence Plaumann, Director, bought 5,000 shares for $15k (Form 4 (opens sec.gov), filed Sep 17, 2026).
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Insiders are also buying, same industry
- LBRT $223k
Data as of Sep 17, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer