Over the trailing 12 months, PESI insiders made no open-market trades in the stock.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark A Zwecker | Director | 248,644 | 0 | 248,644 | 18.6% | 02 Oct, 2026 |
| 2 | Joe Reeder | Director | 240,634 | 0 | 240,634 | 18.0% | 02 Oct, 2026 |
| 3 | Louis F Centofanti | Evp Of Strategic Initiatives | 218,765 | 0 | 218,765 | 16.4% | 18 Mar, 2025 |
| 4 | Larry Shelton | Director | 200,229 | 0 | 200,229 | 15.0% | 02 Oct, 2026 |
| 5 | Mark Duff | President And Ceo | 134,556 | 0 | 134,556 | 10.1% | 12 Sep, 2025 |
| 6 | Joseph Timothy Grumski | Director | 69,099 | 0 | 69,099 | 5.2% | 02 Oct, 2026 |
| 7 | Zach Paul Wamp | Director | 54,248 | 0 | 54,248 | 4.1% | 02 Oct, 2026 |
| 8 | Thomas Bostick | Director | 51,718 | 0 | 51,718 | 3.9% | 02 Oct, 2026 |
| 9 | Ben Naccarato | Chief Financial Officer | 48,811 | 0 | 48,811 | 3.7% | 24 Mar, 2025 |
| 10 | Richard Grondin | Evp Of Hanford Int. Waste Op | 41,308 | 0 | 41,308 | 3.1% | 21 Jan, 2026 |
| 11 | Andy Lombardo | Evp Of Nuclear Technical Svc | 17,448 | 0 | 17,448 | 1.3% | 06 Dec, 2023 |
| 12 | Kerry C Duggan | Director | 8,388 | 0 | 8,388 | 0.6% | 02 Oct, 2026 |
| 13 | Troy Eshleman | Chief Operating Officer | 1,350 | 0 | 1,350 | 0.1% | 19 Mar, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Oct, 2026 | Zach Paul Wamp | Director | Acquired A | 775 | $11.74 | $9.10K | 54,248 | Direct |
| 01 Oct, 2026 | Mark A Zwecker | Director | Acquired A | 1,038 | $11.74 | $12.18K | 248,644 | Direct |
| 01 Oct, 2026 | Joe Reeder | Director | Acquired A | 1,289 | $11.74 | $15.13K | 240,634 | Direct |
| 01 Oct, 2026 | Joseph Timothy Grumski | Director | Acquired A | 1,438 | $11.74 | $16.88K | 69,099 | Direct |
| 01 Oct, 2026 | Larry Shelton | Director | Acquired A | 1,246 | $11.74 | $14.62K | 200,229 | Direct |
| 01 Oct, 2026 | Thomas Bostick | Director | Acquired A | 1,108 | $11.74 | $13.01K | 51,718 | Direct |
| 01 Oct, 2026 | Kerry C Duggan | Director | Acquired A | 748 | $11.74 | $8.78K | 8,388 | Direct |
| 22 Jul, 2026 | Joe Reeder | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Zach Paul Wamp | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Joseph Timothy Grumski | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Thomas Bostick | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Larry Shelton | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Mark A Zwecker | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 22 Jul, 2026 | Kerry C Duggan | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 13 Jul, 2026 | Larry Shelton | Director | Acquired M | 2,400 | $4.60 | $11.04K | 198,983 | Direct |
| 13 Jul, 2026 | Larry Shelton | Director | Disposed M | 2,400 | $0.00 | $0 | 0 | Direct |
| 01 Jul, 2026 | Mark A Zwecker | Director | Acquired A | 1,167 | $10.72 | $12.51K | 247,606 | Direct |
| 01 Jul, 2026 | Zach Paul Wamp | Director | Acquired A | 849 | $10.72 | $9.10K | 53,473 | Direct |
| 01 Jul, 2026 | Larry Shelton | Director | Acquired A | 1,365 | $10.72 | $14.63K | 196,583 | Direct |
| 01 Jul, 2026 | Joseph Timothy Grumski | Director | Acquired A | 1,528 | $10.72 | $16.38K | 67,661 | Direct |