Duff Mark, President and CEO of Perma-Fix Environmental Services Inc. ($PESI), made six open market purchases of $PESI stock in the last year, totaling $28,788. His latest buy occurred on September 11, 2025. These purchases rank 3,477th among nearly 5,000 insiders averaging $1.5 million and 3.3 transactions each. Duff Mark reported no open market sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 11, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 897 | $8.05 | 134,556.0000 | 18,428,393 | 0.67% | 0.00% |
| March 21, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 650 | $7.03 | 133,009.0000 | 18,428,393 | 0.49% | 0.00% |
| March 21, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 650 | $7.05 | 133,659.0000 | 18,428,393 | 0.49% | 0.00% |
| March 21, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 750 | $7.02 | 132,359.0000 | 18,428,393 | 0.57% | 0.00% |
| March 18, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 500 | $7.20 | 131,609.0000 | 18,428,393 | 0.38% | 0.00% |
| March 18, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 500 | $7.10 | 131,109.0000 | 18,428,393 | 0.38% | 0.00% |
| Jan. 8, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | M | Stock Option | 25000 | $0.00 | 120,000.0000 | 0 | 17.24% | 0.00% |
| Jan. 8, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | F | Common Stock | 7443 | $10.58 | 130,609.0000 | 0 | 5.39% | 0.00% |
| Jan. 8, 2025 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | M | Common Stock | 25000 | $3.15 | 138,052.0000 | 0 | 22.11% | 0.00% |
| Sept. 4, 2024 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 350 | $9.95 | 113,052.0000 | 0 | 0.31% | 0.00% |
| Sept. 3, 2024 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 750 | $10.07 | 112,202.0000 | 0 | 0.67% | 0.00% |
| Sept. 3, 2024 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 500 | $10.48 | 111,452.0000 | 0 | 0.45% | 0.00% |
| Sept. 4, 2024 | PERMA FIX ENVIRONMENTAL SERVICES INC | $PESI | Duff Mark | President and CEO | P | Common Stock | 500 | $9.91 | 112,702.0000 | 0 | 0.45% | 0.00% |