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.
Q1 2026 vs. Q4 2025
How the institutions holding Perma Fix Environmental Services Inc changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Of which not filed for Q1 2026 | Q1 2026 | Change |
|---|---|---|---|---|
| Holders | 84 | 3 | 85 | +4 |
| Shares | 7.88M | 1.13M | 7.57M | +827.5K (+12.3%) |
| Value | $99.2M | $14.3M | $80.9M | −$4.00M (−4.7%) |
3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (17)
Institutions that held Perma Fix Environmental Services Inc at the end of Q1 2026 but not at the end of Q4 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Vanguard Capital Management LLC | 759,435 | $8.12M | 0.00% |
| Vanguard Fiduciary Trust Co | 119,253 | $1.27M | 0.00% |
| Vanguard Portfolio Management LLC | 100,318 | $1.07M | 0.00% |
| Simplex Trading, LLC | 31,318 | $334.8K | 0.01% |
| XTX Topco Ltd | 23,227 | $248.3K | 0.00% |
| Brown Advisory Inc | 20,000 | $213.8K | 0.00% |
| IMC-Chicago, LLC | 16,933 | $181.0K | 0.00% |
| Gsa Capital Partners LLP | 16,097 | $172.0K | 0.01% |
| Greenhaven Road Investment Management, L.P. | 11,303 | $120.5K | 0.08% |
| Invesco Ltd. | 11,135 | $119.0K | 0.00% |
| American Century Companies Inc | 10,692 | $114.3K | 0.00% |
| Vident Advisory, LLC | 10,390 | $111.1K | 0.00% |
| Vanguard Global Advisers, LLC | 5,742 | $61.4K | 0.00% |
| Capital Advisors, Ltd. LLC | 5,000 | $53.0K | 0.01% |
| Jones Financial Companies LLLP | 140 | $1.49K | 0.00% |
| Caitong International Asset Management Co., Ltd | 14 | $150 | 0.00% |
| Farther Finance Advisors, LLC | 2 | $22 | 0.00% |
Sold out (13)
Institutions that held Perma Fix Environmental Services Inc at the end of Q4 2025 and filed for Q1 2026 without it.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| EAM Investors, LLC | 64,784 | $815.6K |
| Ancora Advisors, LLC | 57,927 | $729.3K |
| SEI Investments Co | 39,442 | $496.6K |
| Millennium Management LLC | 38,617 | $486.2K |
| ARS Investment Partners, LLC | 36,145 | $455.1K |
| Los Angeles Capital Management LLC | 22,960 | $321.6K |
| Brookwood Investment Group LLC | 20,873 | $262.8K |
| HRT Financial LP | 14,585 | $183.0K |
| Flagship Harbor Advisors, LLC | 910 | $11.5K |
| Amalgamated Bank | 544 | $7.00K |
| SRS Capital Advisors, Inc. | 9 | $113 |
| EverSource Wealth Advisors, LLC | 3 | $38 |
| Quest Partners LLC | 1 | $13 |
Not filed for Q1 2026 yet (3)
Institutions that held Perma Fix Environmental Services Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Vanguard Group Inc | 968,107 | $12.2M |
| Perritt Capital Management Inc | 166,300 | $2.09M |
| Global Retirement Partners, LLC | 500 | $6.29K |