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.
Q4 2025 vs. Q3 2025
How the institutions holding Perma Fix Environmental Services Inc changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Q4 2025 | Change |
|---|---|---|---|
| Holders | 77 | 84 | +7 |
| Shares | 7.42M | 7.88M | +455.9K (+6.1%) |
| Value | $75.0M | $99.2M | +$24.2M (+32.3%) |
New holders (14)
Institutions that held Perma Fix Environmental Services Inc at the end of Q4 2025 but not at the end of Q3 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Potomac Capital Management, Inc. | 341,800 | $4.30M | 3.60% |
| Sentinus, LLC | 166,300 | $2.09M | 0.20% |
| MYDA Advisors LLC | 100,000 | $1.26M | 0.35% |
| EAM Investors, LLC | 64,784 | $815.6K | 0.09% |
| SEI Investments Co | 39,442 | $496.6K | 0.00% |
| Millennium Management LLC | 38,617 | $486.2K | 0.00% |
| Squarepoint Ops LLC | 36,842 | $463.8K | 0.00% |
| Los Angeles Capital Management LLC | 22,960 | $321.6K | 0.00% |
| Quent Capital, LLC | 16,199 | $203.9K | 0.01% |
| HRT Financial LP | 14,585 | $183.0K | 0.00% |
| Price T Rowe Associates Inc | 11,202 | $142.0K | 0.00% |
| Flagship Harbor Advisors, LLC | 910 | $11.5K | 0.00% |
| Global Retirement Partners, LLC | 500 | $6.29K | 0.00% |
| Torren Management, LLC | 53 | $667 | 0.00% |
Sold out (7)
Institutions that held Perma Fix Environmental Services Inc at the end of Q3 2025 and filed for Q4 2025 without it.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Van Eck Associates Corp | 220,289 | $2.23M |
| Essex Investment Management Co LLC | 196,197 | $1.98M |
| Legato Capital Management LLC | 56,459 | $570.2K |
| Trexquant Investment LP | 42,156 | $425.8K |
| Blue Square Asset Management, LLC | 20,100 | $203.0K |
| Verition Fund Management LLC | 14,456 | $146.0K |
| Simplex Trading, LLC | 2,804 | $28.0K |