Mark Lawrence Plaumann insider trades: Mammoth Energy Services (TUSK) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
Open-market buys and sales
8 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | TUSK | ↑ Buy | 5,000 | $3.00 | $15K | Direct | Sep 17, 2026 (1d) |
| Aug 21, 2026 | FANG | ↓ Sell | 1,000 | $210.58 | $211K | Direct | Aug 24, 2026 (3d) |
| Jun 9, 2026 | FANG | ↓ Sell | 500 | $196.50 | $98K | Direct | Jun 10, 2026 (1d) |
| Nov 13, 2024 | FANG | ↓ Sell | 1,150 | $181.00 | $208K | Direct | Nov 14, 2024 (1d) |
| Nov 13, 2024 | FANG | ↓ Sell | 240 | $181.00 | $43K | By Greyhawke Capital Advisors LLC | Nov 14, 2024 (1d) |
| May 23, 2017 | FANG | ↓ Sell | 1,000 | $101.52 | $102K | By Greyhawke Capital Advisors LLC | May 25, 2017 (2d) |
| Feb 17, 2017 | FANG | ↓ Sell | 1,900 | $107.35 | $204K | By Greyhawke Capital Advisors LLC | Feb 21, 2017 (4d) |
| Sep 14, 2015 | FANG | ↓ Sell | 3,000 | $65.66 | $197K | By Greyhawke Capital Advisors LLC | Sep 16, 2015 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other TUSK insiders
Open-market trades in the last 12 months
About Mark Lawrence Plaumann's insider trades
Mark Lawrence Plaumann is a director at Mammoth Energy Services (TUSK). Since Sep 14, 2015, Mark has reported 1 open-market purchase worth $15K and 7 sales worth $1.1M on SEC Form 4. In the last 12 months: 1 buy ($15K) and 2 sales ($309K).
Their filings also include grants and awards (33 filings), other transactions (3 filings), gifts (2 filings), shares returned to the company (2 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every TUSK insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.