Insider · CIK 0001179697
Arthur H Amron
Files at NEPH (NEPHROS INC), TUSK (MAMMOTH ENERGY SERVICES, INC.). First filing Dec 16, 2024, latest Jun 15, 2026.
Where the trades landed
Last year at the company 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™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 27Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | $15k 4,500 shares | +7% | +84% from low-17% from high | |
| 18Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | $18k 5,500 shares | +10% | +87% from low-5% from high | |
| 39Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | $19k 10,000 shares | +21% | +6% from low-46% from high | |
| 15Weak | TUSKbuy MAMMOTH ENERGY SERVICES, INC. | $2,971 1,000 shares | +2% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | NEPH NEPHROS INC | JOther Common Stock | +17,749 | $0.00 | $0 | 158,623 | 26 d ago |
| Sep 14, 2026 | NEPH NEPHROS INC | JOther Common Stockindirect: See footnote | +2,836 | $0.00 | $0 | 2,836 | 26 d ago |
| Sep 14, 2026 | NEPH NEPHROS INC | JOther Common Stockindirect: See footnote | +22,710 | $3.95 | $90k | 25,546 | 26 d ago |
| Jun 17, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | JOther Common Stock | +19,121 | $0.00 | $0 | 86,256 | Jun 22, 2026 |
| Jun 17, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | JOther Common Stockindirect: See footnote | +10,329 | $0.00 | $0 | 10,329 | Jun 22, 2026 |
| Jun 11, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +2,500 | $3.22 | $8,050 | 65,135 | Jun 15, 2026 |
| Jun 12, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +2,000 | $3.28 | $6,560 | 67,135 | Jun 15, 2026 |
| May 11, 2026 | NEPH NEPHROS INC | AGrant or award Common Stock | +3,574 | $0.00 | $0 | 138,456 | Jun 12, 2026 |
| May 26, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +2,500 | $3.24 | $8,100 | 59,635 | May 28, 2026 |
| May 28, 2026 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +3,000 | $3.25 | $9,750 | 62,635 | May 28, 2026 |
| Mar 16, 2026 | NEPH NEPHROS INC | AGrant or award Common Stock | +3,610 | $0.00 | $0 | 134,882 | Mar 18, 2026 |
| Dec 11, 2025 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +10,000 | $1.89 | $19k | 57,135 | Dec 15, 2025 |
| Nov 10, 2025 | NEPH NEPHROS INC | AGrant or award Common Stock | +5,391 | $0.00 | $0 | 131,272 | Nov 13, 2025 |
| Jan 1, 2025 | NEPH NEPHROS INC | AGrant or award Common Stock | +22,418 | $0.00 | $0 | 125,881 | Jan 3, 2025 |
| Jan 1, 2025 | NEPH NEPHROS INC | AGrant or award Stock Option (Right to Buy)derivative | +7,050 | $0.00 | $0 | 7,050 | Jan 3, 2025 |
| Dec 12, 2024 | TUSK MAMMOTH ENERGY SERVICES, INC. | POpen-market purchase Common Stock | +1,000 | $2.97 | $2,971 | 47,135 | Dec 16, 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.