PESI (Perma-Fix Environmental Services, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by PESI officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-24 | JOE REEDER | Director | A | — | — |
| 2026-07-23 | Kerry C Duggan | Director | A | — | — |
| 2026-07-23 | Thomas Bostick | Director | A | — | — |
| 2026-07-23 | Zach Paul Wamp | Director | A | — | — |
| 2026-07-23 | Joseph Timothy Grumski | Director | A | — | — |
| 2026-07-23 | Larry Shelton | Director | A | — | — |
| 2026-07-23 | MARK A ZWECKER | Director | A | — | — |
| 2026-07-14 | Larry Shelton | Director | M | — | — |
| 2026-07-02 | Thomas Bostick | Director | A | — | — |
| 2026-07-02 | Zach Paul Wamp | Director | A | — | — |
| 2026-07-02 | MARK A ZWECKER | Director | A | — | — |
| 2026-07-02 | JOE REEDER | Director | A | — | — |
| 2026-07-02 | Joseph Timothy Grumski | Director | A | — | — |
| 2026-07-02 | Larry Shelton | Director | A | — | — |
| 2026-07-02 | Kerry C Duggan | Director | A | — | — |
| 2026-04-02 | Thomas Bostick | Director | A | — | — |
| 2026-04-02 | MARK A ZWECKER | Director | A | — | — |
| 2026-04-02 | JOE REEDER | Director | A | — | — |
| 2026-04-02 | Larry Shelton | Director | A | — | — |
| 2026-04-02 | Zach Paul Wamp | Director | A | — | — |
| 2026-04-02 | Kerry C Duggan | Director | A | — | — |
| 2026-04-02 | Joseph Timothy Grumski | Director | A | — | — |
| 2026-02-10 | LOUIS F CENTOFANTI | EVP of Strategic Initiatives | G | — | — |
| 2026-01-21 | Richard Grondin | EVP of Hanford & Int. Waste Op | MIXED | — | — |
| 2026-01-06 | JOE REEDER | Director | A | — | — |
| 2026-01-05 | MARK A ZWECKER | Director | A | — | — |
| 2026-01-05 | Zach Paul Wamp | Director | A | — | — |
| 2026-01-05 | Kerry C Duggan | Director | A | — | — |
| 2026-01-05 | Larry Shelton | Director | A | — | — |
| 2026-01-05 | Thomas Bostick | Director | A | — | — |
| 2026-01-05 | Joseph Timothy Grumski | Director | A | — | — |
| 2025-12-16 | JOE REEDER | Director | G | — | — |
| 2025-10-02 | Joseph Timothy Grumski | Director | A | — | — |
| 2025-10-02 | MARK A ZWECKER | Director | A | — | — |
| 2025-10-02 | JOE REEDER | Director | A | — | — |
| 2025-10-02 | Zach Paul Wamp | Director | A | — | — |
| 2025-10-02 | Kerry C Duggan | Director | A | — | — |
| 2025-10-02 | Larry Shelton | Director | A | — | — |
| 2025-10-02 | Thomas Bostick | Director | A | — | — |
| 2025-09-16 | Kerry C Duggan | Director | Sell | — | — |
| 2025-09-12 | Mark Duff | President and CEO | Buy | — | — |
| 2025-09-12 | Larry Shelton | Director | Buy | — | — |
| 2025-09-10 | Larry Shelton | Director | Buy | — | — |
| 2025-09-03 | Larry Shelton | Director | M | — | — |
| 2025-09-02 | MARK A ZWECKER | Director | M | — | — |
| 2025-07-25 | MARK A ZWECKER | Director | A | — | — |
| 2025-07-25 | Thomas Bostick | Director | A | — | — |
| 2025-07-25 | JOE REEDER | Director | A | — | — |
| 2025-07-25 | Zach Paul Wamp | Director | A | — | — |
| 2025-07-25 | Joseph Timothy Grumski | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | EVP of Strategic Initiatives | 280,365 | — |
| — | Director | 262,166 | — |
| — | Director | 247,606 | — |
| — | Director | 198,983 | — |
| — | Director | 197,433 | — |
| — | President and CEO | 134,556 | — |
| — | Chief Financial Officer | 73,335 | — |
| — | Director | 67,661 | — |
| — | Director | 62,843 | — |
| — | Director | 53,473 | — |
| — | Director | 50,610 | — |
| — | Chief Financial Officer | 48,811 | — |
| — | Director | 46,013 | — |
| — | Director | 45,537 | — |
| — | EVP of Hanford & Int. Waste Op | 41,308 | — |
| — | Director | 38,466 | — |
| — | Director | 34,711 | — |
| — | President of SYA | 21,058 | — |
| — | EVP of Nuclear & Technical Svc | 17,448 | — |
| — | Director | 14,363 | — |
| — | COO-Resigned effective 9/1/09 | 10,844 | — |
| — | Director | 7,640 | — |
| — | Chief Operating Officer | 1,350 | — |
| — | Chief Operating Officer | 1,000 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the PESI quote page; the site-wide leaderboard is on the insider transactions hub.