Mark Duff serves as Executive at PERMA FIX ENVIRONMENTAL SERVICES INC, where they oversee executive responsibilities. Since joining the company, Mark Duff has executed 47 insider transactions totaling $155.3K, demonstrating a bullish approach to their equity position. Their most recent transaction on Sep 11, 2025 involved purchasing 897 shares valued at $7.2K.
Mark Duff currently holds 134,556 shares of PERMA FIX ENVIRONMENTAL SERVICES INC (PESI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark Duff has been a net buyer of PESI stock. They have purchased $155.3K and sold $0 worth of shares.
Mark Duff's most recent insider trade was on Sep 11, 2025, when they purchased 897 shares at $8.05 per share.
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| $9.95 |
| Discretionary |
| Sep 4, 2024 | PESI | $5.0K | Purchase | 500 | $9.91 | Discretionary |
| Sep 3, 2024 | PESI | $5.2K | Purchase | 500 | $10.48 | Discretionary |
| Sep 3, 2024 | PESI | $7.6K | Purchase | 750 | $10.07 | Discretionary |
| Dec 1, 2023 | PESI | $5.5K | Purchase | 750 | $7.27 | Discretionary |
| Dec 1, 2023 | PESI | $5.3K | Purchase | 750 | $7.07 | Discretionary |
| Dec 1, 2023 | PESI | $5.3K | Purchase | 750 | $7.00 | Discretionary |
| Dec 1, 2023 | PESI | $5.5K | Purchase | 750 | $7.28 | Discretionary |
| May 22, 2023 | PESI | $365.0K | Option Exercise | 100,000 | $3.65 | Discretionary |
| May 22, 2023 | PESI | $365.0K | Payment | 33,032 | $11.05 | Discretionary |
| Nov 22, 2022 | PESI | $3.9K | Purchase | 1,000 | $3.89 | Discretionary |
| Sep 7, 2022 | PESI | $4.8K | Purchase | 1,000 | $4.75 | Discretionary |
| Sep 7, 2022 | PESI | $2.4K | Purchase | 500 | $4.76 | Discretionary |
| May 12, 2022 | PESI | $5.2K | Purchase | 922 | $5.60 | Discretionary |
| May 12, 2022 | PESI | $5.5K | Purchase | 1,000 | $5.50 | Discretionary |
| May 11, 2022 | PESI | $437 | Purchase | 78 | $5.60 | Discretionary |
| May 9, 2022 | PESI | $198.5K | Payment | 33,474 | $5.93 | Discretionary |
| May 9, 2022 | PESI | $198.5K | Option Exercise | 50,000 | $3.97 | Discretionary |
| Dec 20, 2021 | PESI | $3.9K | Purchase | 600 | $6.50 | Discretionary |
| Dec 17, 2021 | PESI | $6.6K | Purchase | 1,000 | $6.57 | Discretionary |
| Dec 17, 2021 | PESI | $241 | Purchase | 37 | $6.52 | Discretionary |
| Dec 29, 2020 | PESI | $2.9K | Purchase | 500 | $5.85 | Discretionary |
| Nov 9, 2020 | PESI | $3.1K | Purchase | 500 | $6.20 | Discretionary |
| Aug 12, 2020 | PESI | $137 | Purchase | 20 | $6.85 | Discretionary |
| Aug 11, 2020 | PESI | $3.5K | Purchase | 500 | $6.92 | Discretionary |
| Aug 11, 2020 | PESI | $3.6K | Purchase | 500 | $7.11 | Discretionary |
| Aug 11, 2020 | PESI | $5.2K | Purchase | 750 | $6.99 | Discretionary |
| Mar 30, 2020 | PESI | $2.5K | Purchase | 500 | $5.10 | Discretionary |
| Mar 23, 2020 | PESI | $4.2K | Purchase | 1,000 | $4.15 | Discretionary |