PESI
Perma-Fix Environmental Svcs Inc
NASDAQ: PESI · INDUSTRIALS · WASTE MANAGEMENT
$18.77
+2.85% today
Updated 2026-09-11
Market cap
$396.78M
P/E ratio
—
P/S ratio
6.94x
EPS (TTM)
$-0.96
Dividend yield
—
52W range
$8 – $21
Volume
0.5M
Perma-Fix Environmental Svcs Inc (PESI) Insider transactions
Net insider activity
Net buying (164,849 shares)
Buy transactions
78
Sell transactions
22
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-22 | ZWECKER, MARK A | Director | Buy | 10,000 | — | — |
| 2026-07-22 | WAMP, ZACH PAUL | Director | Buy | 10,000 | — | — |
| 2026-07-22 | SHELTON, LARRY | Director | Buy | 10,000 | — | — |
| 2026-07-22 | REEDER, JOE | Director | Buy | 10,000 | — | — |
| 2026-07-22 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 10,000 | — | — |
| 2026-07-22 | DUGGAN, KERRY C | Director | Buy | 10,000 | — | — |
| 2026-07-22 | BOSTICK, THOMAS | Director | Buy | 10,000 | — | — |
| 2026-07-13 | SHELTON, LARRY | Director | Sale | 2,400 | — | — |
| 2026-07-13 | SHELTON, LARRY | Director | Buy | 2,400 | $4.60 | $11040.00 |
| 2026-07-01 | ZWECKER, MARK A | Director | Buy | 1,167 | $10.72 | $12507.32 |
| 2026-07-01 | WAMP, ZACH PAUL | Director | Buy | 849 | $10.72 | $9099.16 |
| 2026-07-01 | SHELTON, LARRY | Director | Buy | 1,365 | $10.72 | $14629.39 |
| 2026-07-01 | REEDER, JOE | Director | Buy | 1,458 | $10.72 | $15626.11 |
| 2026-07-01 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 1,528 | $10.72 | $16376.34 |
| 2026-07-01 | DUGGAN, KERRY C | Director | Buy | 819 | $10.72 | $8777.63 |
| 2026-07-01 | BOSTICK, THOMAS | Director | Buy | 1,213 | $10.72 | $13000.33 |
| 2026-04-01 | ZWECKER, MARK A | Director | Buy | 1,520 | $8.02 | $12186.60 |
| 2026-04-01 | WAMP, ZACH PAUL | Director | Buy | 1,094 | $8.02 | $8771.15 |
| 2026-04-01 | SHELTON, LARRY | Director | Buy | 1,824 | $8.02 | $14623.92 |
| 2026-04-01 | REEDER, JOE | Director | Buy | 1,886 | $8.02 | $15121.01 |
| 2026-04-01 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 2,105 | $8.02 | $16876.84 |
| 2026-04-01 | DUGGAN, KERRY C | Director | Buy | 1,054 | $8.02 | $8450.44 |
| 2026-04-01 | BOSTICK, THOMAS | Director | Buy | 1,559 | $8.02 | $12499.28 |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 6,000 | — | — |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 5,000 | — | — |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Buy | 6,000 | $3.95 | $23700.00 |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Buy | 5,000 | $7.01 | $35025.00 |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 2,555 | $13.71 | $35029.05 |
| 2026-01-20 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 1,729 | $13.71 | $23704.59 |
| 2026-01-02 | ZWECKER, MARK A | Director | Buy | 1,325 | $9.44 | $12511.31 |
| 2026-01-02 | WAMP, ZACH PAUL | Director | Buy | 964 | $9.44 | $9102.57 |
| 2026-01-02 | SHELTON, LARRY | Director | Buy | 1,583 | $9.44 | $14947.48 |
| 2026-01-02 | REEDER, JOE | Director | Buy | 1,549 | $9.44 | $14626.43 |
| 2026-01-02 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 1,840 | $9.44 | $17374.20 |
| 2026-01-02 | DUGGAN, KERRY C | Director | Buy | 929 | $9.44 | $8772.08 |
| 2026-01-02 | BOSTICK, THOMAS | Director | Buy | 1,324 | $9.44 | $12501.87 |
| 2025-12-15 | REEDER, JOE | Director | Sale | 11,048 | — | — |
| 2025-12-15 | REEDER, JOE | Director | Sale | 1,090 | — | — |
| 2025-12-15 | REEDER, JOE | Director | Sale | 727 | — | — |
| 2025-12-15 | REEDER, JOE | Director | Sale | 364 | — | — |
| 2025-11-17 | CENTOFANTI, LOUIS F | Director, EVP of Strategic Initiatives | Sale | 600 | — | — |
| 2025-10-01 | ZWECKER, MARK A | Director | Buy | 1,609 | $7.58 | $12188.18 |
| 2025-10-01 | WAMP, ZACH PAUL | Director | Buy | 1,201 | $7.58 | $9097.58 |
| 2025-10-01 | SHELTON, LARRY | Director | Buy | 1,931 | $7.58 | $14627.33 |
| 2025-10-01 | REEDER, JOE | Director | Buy | 2,063 | $7.58 | $15627.23 |
| 2025-10-01 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 2,228 | $7.58 | $16877.10 |
| 2025-10-01 | DUGGAN, KERRY C | Director | Buy | 1,158 | $7.58 | $8771.85 |
| 2025-10-01 | BOSTICK, THOMAS | Director | Buy | 1,716 | $7.58 | $12998.70 |
| 2025-09-16 | DUGGAN, KERRY C | Director | Sale | 5,653 | $8.60 | $48616.37 |
| 2025-09-11 | SHELTON, LARRY | Director | Buy | 1,000 | $8.58 | $8575.20 |
| 2025-09-11 | DUFF, MARK | Director, President and CEO | Buy | 897 | $8.05 | $7220.85 |
| 2025-09-09 | SHELTON, LARRY | Director | Buy | 1,000 | $9.61 | $9610.10 |
| 2025-09-02 | SHELTON, LARRY | Director | Sale | 2,400 | — | — |
| 2025-09-02 | SHELTON, LARRY | Director | Buy | 2,400 | $4.19 | $10056.00 |
| 2025-08-28 | ZWECKER, MARK A | Director | Sale | 2,400 | — | — |
| 2025-08-28 | ZWECKER, MARK A | Director | Buy | 2,400 | $4.19 | $10056.00 |
| 2025-07-24 | ZWECKER, MARK A | Director | Buy | 10,000 | — | — |
| 2025-07-24 | WAMP, ZACH PAUL | Director | Buy | 10,000 | — | — |
| 2025-07-24 | SHELTON, LARRY | Director | Buy | 10,000 | — | — |
| 2025-07-24 | REEDER, JOE | Director | Buy | 10,000 | — | — |
| 2025-07-24 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 10,000 | — | — |
| 2025-07-24 | DUGGAN, KERRY C | Director | Buy | 10,000 | — | — |
| 2025-07-24 | BOSTICK, THOMAS | Director | Buy | 10,000 | — | — |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 6,000 | — | — |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 5,000 | — | — |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Buy | 6,000 | $3.95 | $23700.00 |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Buy | 5,000 | $7.01 | $35025.00 |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 3,094 | $11.32 | $35024.08 |
| 2025-07-14 | GRONDIN, RICHARD | EVP of Hanford & Int. Waste Op | Sale | 2,094 | $11.32 | $23704.08 |
| 2025-07-01 | ZWECKER, MARK A | Director | Buy | 1,586 | $7.89 | $12513.54 |
| 2025-07-01 | WAMP, ZACH PAUL | Director | Buy | 1,153 | $7.89 | $9097.17 |
| 2025-07-01 | SHELTON, LARRY | Director | Buy | 1,895 | $7.89 | $14951.55 |
| 2025-07-01 | REEDER, JOE | Director | Buy | 1,980 | $7.89 | $15622.20 |
| 2025-07-01 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 2,202 | $7.89 | $17373.78 |
| 2025-07-01 | DUGGAN, KERRY C | Director | Buy | 1,112 | $7.89 | $8773.68 |
| 2025-07-01 | BOSTICK, THOMAS | Director | Buy | 1,584 | $7.89 | $12497.76 |
| 2025-05-30 | DUGGAN, KERRY C | Director | Sale | 16,634 | — | — |
| 2025-04-01 | ZWECKER, MARK A | Director | Buy | 2,235 | $5.45 | $12186.34 |
| 2025-04-01 | WAMP, ZACH PAUL | Director | Buy | 1,609 | $5.45 | $8773.07 |
| 2025-04-01 | SHELTON, LARRY | Director | Buy | 2,623 | $5.45 | $14301.91 |
| 2025-04-01 | REEDER, JOE | Director | Buy | 2,774 | $5.45 | $15125.23 |
| 2025-04-01 | GRUMSKI, JOSEPH TIMOTHY | Director | Buy | 3,095 | $5.45 | $16875.49 |
| 2025-04-01 | DUGGAN, KERRY C | Director | Buy | 1,550 | $5.45 | $8451.38 |
| 2025-04-01 | BOSTICK, THOMAS | Director | Buy | 2,293 | $5.45 | $12502.58 |
| 2025-03-21 | SHELTON, LARRY | Director | Buy | 2,000 | $7.07 | $14139.80 |
| 2025-03-21 | NACCARATO, BEN | Chief Financial Officer | Buy | 400 | $7.00 | $2800.00 |
| 2025-03-21 | DUFF, MARK | Director, President and CEO | Buy | 750 | $7.02 | $5265.00 |
| 2025-03-21 | DUFF, MARK | Director, President and CEO | Buy | 650 | $7.03 | $4569.50 |
| 2025-03-18 | ESHLEMAN, TROY | Chief Operating Officer | Buy | 1,350 | $7.35 | $9922.50 |
| 2025-03-18 | DUFF, MARK | Director, President and CEO | Buy | 500 | $7.20 | $3600.00 |
| 2025-03-17 | CENTOFANTI, LOUIS F | Director, EVP of Strategic Initiatives | Buy | 1,000 | $7.31 | $7310.00 |
| 2025-01-08 | NACCARATO, BEN | Chief Financial Officer | Sale | 15,000 | — | — |
| 2025-01-08 | NACCARATO, BEN | Chief Financial Officer | Buy | 15,000 | $3.15 | $47250.00 |
| 2025-01-08 | NACCARATO, BEN | Chief Financial Officer | Sale | 4,466 | $10.58 | $47250.28 |
| 2025-01-08 | DUFF, MARK | Director, President and CEO | Sale | 25,000 | — | — |
| 2025-01-08 | DUFF, MARK | Director, President and CEO | Buy | 25,000 | $3.15 | $78750.00 |
| 2025-01-08 | DUFF, MARK | Director, President and CEO | Sale | 7,443 | $10.58 | $78746.94 |
| 2025-01-02 | ZWECKER, MARK A | Director | Buy | 1,468 | $8.30 | $12188.07 |
| 2025-01-02 | WAMP, ZACH PAUL | Director | Buy | 1,057 | $8.30 | $8775.74 |
| 2025-01-02 | SHELTON, LARRY | Director | Buy | 1,722 | $8.30 | $14296.91 |
Frequently asked questions
Are PESI insiders buying or selling?
Over the transactions on record, PESI insiders have been net buyers, with about $292075.39 in stock sold across 22 sales, against 64 open-market purchases.
Does insider selling at PESI mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which PESI insiders are selling the most?
Recent selling is concentrated in a few names. GRONDIN, RICHARD accounts for the largest share on record, with about $117461.80 sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.