Insider · CIK 0001678382
Mark Duff
Files at PESI (PERMA FIX ENVIRONMENTAL SERVICES INC). First filing Mar 19, 2025, latest Sep 12, 2025.
Mark Duff files SEC Form 4 as CEO, president and director at PESI (PERMA FIX ENVIRONMENTAL SERVICES INC). Since Mar 19, 2025, Mark Duff has reported 3 open-market buys worth $29k and 0 open-market sells worth $0, the latest filed on Sep 12, 2025.
A track record needs three past buys with six months of prices behind them; Mark Duff has 0, so none is measured yet.
The newest scored trade: bought $7,221 of PESI on Sep 11, 2025, filed Sep 12, 2025, scored 36 (weak).
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
PESI: PERMA FIX ENVIRONMENTAL 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 |
|---|---|---|---|---|---|
| 36Weak | PERMA FIX ENVIRONMENTAL SERVICES INC | $7,221 897 shares | +1% | +26% from low-47% from high | |
| 45Moderate | PERMA FIX ENVIRONMENTAL SERVICES INC | $14k 2,050 shares | +2% | - | |
| 35Weak | PERMA FIX ENVIRONMENTAL SERVICES INC | $7,150 1,000 shares | +1% | - |
Transactions
Every row this insider has filed, 9 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 11, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +897 | $8.05 | $7,221 | 134,556 | Sep 12, 2025 |
| Mar 21, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +750 | $7.02 | $5,265 | 132,359 | Mar 24, 2025 |
| Mar 21, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +650 | $7.03 | $4,570 | 133,009 | Mar 24, 2025 |
| Mar 21, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +650 | $7.05 | $4,583 | 133,659 | Mar 24, 2025 |
| Mar 18, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +500 | $7.10 | $3,550 | 131,109 | Mar 19, 2025 |
| Mar 18, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | POpen-market purchase Common Stock | +500 | $7.20 | $3,600 | 131,609 | Mar 19, 2025 |
| Jan 8, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | MOption exercise Common Stock | +25,000 | $3.15 | $79k | 138,052 | Jan 10, 2025 |
| Jan 8, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | FTax withholding Common Stock | -7,443 | $10.58 | $79k | 130,609 | Jan 10, 2025 |
| Jan 8, 2025 | PESI PERMA FIX ENVIRONMENTAL SERVICES INC | MOption exercise Stock Optionderivative | -25,000 | $0.00 | $0 | 0 | Jan 10, 2025 |
Questions about Mark Duff
Answered from the filings on this page, as of the latest one.
Is Mark Duff buying or selling?
Not in the last 12 months. Mark Duff's latest open-market trade on SEC Form 4 was bought $7,221 of PESI on Sep 11, 2025.
How did Mark Duff's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mark Duff has 0.
Where does Mark Duff file Form 4?
Mark Duff has filed Form 4 at PESI (PERMA FIX ENVIRONMENTAL SERVICES INC) as President and CEO. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.