Mark Duff insider trades: Perma Fix Environmental Services (PESI) stock purchases
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
21 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 11, 2025 | PESI | ↑ Buy | 897 | $8.05 | $7K | Direct | Sep 12, 2025 (1d) |
| Mar 21, 2025 | PESI | ↑ Buy | 2,050 | $7.03 | $14K | Direct | Mar 24, 2025 (3d) |
| Mar 18, 2025 | PESI | ↑ Buy | 1,000 | $7.15 | $7K | Direct | Mar 19, 2025 (1d) |
| Sep 4, 2024 | PESI | ↑ Buy | 2,100 | $10.11 | $21K | Direct | Sep 5, 2024 (1d) |
| Dec 1, 2023 | PESI | ↑ Buy | 3,000 | $7.16 | $21K | Direct | Dec 4, 2023 (3d) |
| Nov 22, 2022 | PESI | ↑ Buy | 1,000 | $3.89 | $4K | Direct | Nov 23, 2022 (1d) |
| Sep 7, 2022 | PESI | ↑ Buy | 1,500 | $4.75 | $7K | Direct | Sep 7, 2022 (0d) |
| May 12, 2022 | PESI | ↑ Buy | 2,000 | $5.55 | $11K | Direct | May 13, 2022 (1d) |
| Dec 20, 2021 | PESI | ↑ Buy | 1,637 | $6.54 | $11K | Direct | Dec 20, 2021 (0d) |
| Dec 29, 2020 | PESI | ↑ Buy | 500 | $5.85 | $3K | Direct | Dec 30, 2020 (1d) |
| Nov 9, 2020 | PESI | ↑ Buy | 500 | $6.20 | $3K | Direct | Nov 10, 2020 (1d) |
| Aug 12, 2020 | PESI | ↑ Buy | 1,770 | $7.00 | $12K | Direct | Aug 13, 2020 (1d) |
| Mar 30, 2020 | PESI | ↑ Buy | 500 | $5.10 | $3K | Direct | Mar 31, 2020 (1d) |
| Mar 23, 2020 | PESI | ↑ Buy | 1,500 | $4.12 | $6K | Direct | Mar 24, 2020 (1d) |
| Aug 14, 2019 | PESI | ↑ Buy | 2,000 | $3.77 | $8K | Direct | Aug 15, 2019 (1d) |
| May 15, 2019 | PESI | ↑ Buy | 1,500 | $3.80 | $6K | Direct | May 15, 2019 (0d) |
| Dec 28, 2018 | PESI | ↑ Buy | 1,050 | $2.36 | $2K | Direct | Dec 31, 2018 (3d) |
| Dec 17, 2018 | PESI | ↑ Buy | 701 | $2.95 | $2K | Direct | Dec 17, 2018 (0d) |
| Nov 9, 2018 | PESI | ↑ Buy | 2,300 | $3.45 | $8K | Direct | Nov 9, 2018 (0d) |
| Aug 15, 2017 | PESI | ↑ Buy | 3,000 | $3.42 | $10K | Direct | Aug 15, 2017 (0d) |
| Mar 27, 2017 | PESI | ↑ Buy | 3,000 | $3.15 | $9K | Direct | Mar 27, 2017 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About Mark Duff's insider trades
Mark Duff is President and CEO at Perma Fix Environmental Services (PESI). Since Mar 27, 2017, Mark has reported 21 open-market purchases worth $177K and no sales on SEC Form 4. There have been no open-market trades in the last 12 months.
Their filings also include grants and awards (4 filings), shares withheld for taxes (3 filings), option exercises (3 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 PESI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.