Mark Lawrence Plaumann bought $15k of TUSK
director at MAMMOTH ENERGY SERVICES, INC.. 5,000 shares at an average of $3.00, traded Sep 16, 2026, filed Sep 17, 2026.
Score components
- +15RoleDirector
- 0Trade size$15k at market
- +8Relative to holdingsFirst purchase: no shares before this trade
- +4Price context21% below the 52-week high
- 0ClusterNo other insider buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001628280-26-062552, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 16, 2026 | POpen-market purchase Common Stock | +5,000 | $3.00 | $15k | 5,000 | 25 d ago |
Related signals
Other insiders at MAMMOTH ENERGY SERVICES, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 27Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Arthur L Smith director | $50k 20,000 shares | -13% | |
| 36Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Arthur L Smith director | $163k 65,000 shares | -30% | |
| 15Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | Arthur H Amron director | $2,971 1,000 shares | +2% | |
| 29Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Corey J. Booker director | $86k 25,000 shares | -17% | |
| 21Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Corey J. Booker director | $38k 11,709 shares | -7% | |
| 21Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Corey J. Booker director | $39k 10,707 shares | -6% | |
| 15Weak | TUSKsell MAMMOTH ENERGY SERVICES, INC. | Corey J. Booker director | $13k 3,683 shares | -2% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.