Insider · CIK 0001290795
Mark Lawrence Plaumann
Files at FANG (Diamondback Energy, Inc.), TUSK (MAMMOTH ENERGY SERVICES, INC.). First filing Nov 14, 2024, latest Sep 17, 2026.
Where the trades landed
Last year at the 2 companies this insider has traded most, with each buy and sell on the bar it happened.
TUSK: MAMMOTH ENERGY SERVICES, INC.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
FANG: Diamondback Energy, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 27Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | $15k 5,000 shares | - | +75% from low-21% from high | |
| 33Weak | FANGsell Diamondback Energy, Inc. | $252k 1,390 shares | -24% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +5,000 | $3.00 | $15k | 5,000 | 25 d ago |
| Jun 19, 2025 | FANG Diamondback Energy, Inc. | JOther Common Stock | +2,965 | $0.00 | $0 | 5,267 | Jun 23, 2025 |
| May 21, 2025 | FANG Diamondback Energy, Inc. | AGrant or award Common Stock | +1,417 | $0.00 | $0 | 2,302 | May 22, 2025 |
| Dec 5, 2024 | FANG Diamondback Energy, Inc. | GGift Common Stock | -100 | $0.00 | $0 | 2,302 | Dec 9, 2024 |
| Nov 12, 2024 | FANG Diamondback Energy, Inc. | JOther Common Stockindirect: By Greyhawke Capital Advisors LLC | -11,724 | $0.00 | $0 | 9,476 | Nov 14, 2024 |
| Nov 12, 2024 | FANG Diamondback Energy, Inc. | JOther Common Stock | +5,862 | $0.00 | $0 | 5,862 | Nov 14, 2024 |
| Nov 13, 2024 | FANG Diamondback Energy, Inc. | SOpen-market sale Common Stock | -1,150 | $181.00 | $208k | 4,712 | Nov 14, 2024 |
| Nov 13, 2024 | FANG Diamondback Energy, Inc. | GGift Common Stock | -2,310 | $0.00 | $0 | 2,402 | Nov 14, 2024 |
| Nov 13, 2024 | FANG Diamondback Energy, Inc. | SOpen-market sale Common Stockindirect: By Greyhawke Capital Advisors LLC | -240 | $181.00 | $43k | 9,236 | Nov 14, 2024 |
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.