Perma Fix Environmental Services Inc
PESI- Exchange
- Nasdaq
- Industry
- Hazardous Waste Management
- SEC CIK
- 0000891532
No open-market purchases or sales by Perma Fix Environmental Services Inc insiders were filed in the last 90 days; 88 institutions reported holding it in 13F filings for Q2 2026, worth $135.2M in total; no superinvestor holds it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +5 vs. previous quarter
- 88
- 13F valueReported value at the end of Q2 2026
- $135.2M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding PESI, Q2 2026
No superinvestor reported holding PESI at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Perma Fix Environmental Services Inc insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 16, 2025 (view filing) | Sep 16 | Same day | Duggan Kerry CDirector | SSale | −5.65K | $8.60 | −$48.6K | −60.6%3.68K after | |
| Sep 12, 2025 (view filing) | Sep 11 | 1 day | Duff MarkPresident and CEO | PPurchase | +897 | $8.05 | +$7.22K | +0.7%134.6K after | |
| Sep 12, 2025 (view filing) | Sep 11 | 1 day | Shelton LarryDirector | PPurchase | +1.00K | $8.58 | +$8.58K | +0.5%189.9K after | |
| Sep 10, 2025 (view filing) | Sep 9 | 1 day | Shelton LarryDirector | PPurchase | +1.00K | $9.61 | +$9.61K | +0.5%188.9K after | |
| Jun 2, 2025 (view filing) | May 30 | 3 days | Duggan Kerry CDirector | SSale | −16.6K | – | – | −66.9%8.22K after | |
| Mar 24, 2025 (view filing) | Mar 21 | 3 days | Naccarato BenChief Financial Officer | PPurchase | +400 | $7.00 | +$2.80K | +0.8%48.8K after | |
| Mar 24, 2025 (view filing) | Mar 21 | 3 days | Duff MarkPresident and CEO | PPurchase | +2.05K | $7.03 | +$14.4K | +1.6%133.7K after | 3 lots |
| Mar 19, 2025 (view filing) | Mar 18 | 1 day | Eshleman TroyChief Operating Officer | PPurchase | +1.35K | $7.35 | +$9.92K | New position1.35K after | |
| Mar 19, 2025 (view filing) | Mar 18 | 1 day | Duff MarkPresident and CEO | PPurchase | +1.00K | $7.15 | +$7.15K | +0.8%131.6K after | 2 lots |
| Mar 18, 2025 (view filing) | Mar 17 | 1 day | Centofanti Louis FEVP of Strategic Initiatives | PPurchase | +1.00K | $7.31 | +$7.31K | +0.5%218.8K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Perma Fix Environmental Services Inc at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 1,252,756 | $17.9M | 0.00% | +82,453+7.0% | Added |
| Mak Capital One LLC | 1,032,958 | $14.8M | 2.07% | +114,285+12.4% | Added |
| Vanguard Capital Management LLC | 811,743 | $11.6M | 0.00% | +52,308+6.9% | Added |
| Prescott Group Capital Management, L.L.C. | 777,142 | $11.1M | 0.96% | 00.0% | Unchanged |
| Diamond Hill Capital Management Inc | 642,533 | $9.18M | 0.07% | +286,555+80.5% | Added |
| Kennedy Capital Management, Inc. | 610,903 | $8.73M | 0.15% | +610,903 | New |
| Potomac Capital Management, Inc. | 477,000 | $6.82M | 4.99% | +180,300+60.8% | Added |
| Geode Capital Management, LLC | 455,156 | $6.51M | 0.00% | +22,455+5.2% | Added |
| Heartland Advisors Inc | 400,000 | $5.72M | 0.25% | 00.0% | Unchanged |
| State Street Corp | 349,744 | $5.00M | 0.00% | +14,197+4.2% | Added |