PERMA FIX ENVIRONMENTAL SERVICES INC - PESI
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | History | Reduced | 1,170,303 | 12,510 | 0.0% | 0.0% | 1 | -27,682 | -2.31% | Q1 2026 | May 13, 2026 |
| VANGUARD GROUP INC | History | No change | 968,107 | 12,188 | 0.0% | 0.0% | 2 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| MAK CAPITAL ONE LLC | History | No change | 918,673 | 9,820 | 1.45% | 1.27% | 3 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | History | No change | 777,142 | 8,307 | 0.83% | 0.91% | 4 | 0 | 0.0% | Q1 2026 | May 07, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 759,435 | 8,118 | 0.0% | — | 5 | +759,435 | New | Q1 2026 | May 15, 2026 |
| GROUP ONE TRADING LLC | History | Added to | 501,974 | 5,366 | 0.01% | 0.0% | 6 | +497,947 | 12365.21% | Q1 2026 | May 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 432,701 | 4,626 | 0.0% | 0.0% | 7 | +9,811 | 2.32% | Q1 2026 | May 15, 2026 |
| HEARTLAND ADVISORS INC | History | No change | 400,000 | 4,276 | 0.22% | 0.27% | 8 | 0 | 0.0% | Q1 2026 | May 06, 2026 |
| DIAMOND HILL CAPITAL MANAGEMENT INC | History | Reduced | 355,978 | 3,805 | 0.02% | 0.02% | 9 | -30,865 | -7.98% | Q1 2026 | May 07, 2026 |
| STATE STREET CORP | History | Added to | 335,547 | 3,586 | 0.0% | 0.0% | 10 | +23,280 | 7.46% | Q1 2026 | May 15, 2026 |
| Potomac Capital Management, Inc. | History | Reduced | 296,700 | 3,171 | 2.76% | 3.46% | 11 | -45,100 | -13.19% | Q1 2026 | May 14, 2026 |
| PERRITT CAPITAL MANAGEMENT INC | History | No change | 166,300 | 2,093 | 3.5% | 3.5% | 12 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 163,787 | 1,750 | 0.0% | 0.0% | 13 | -1,000 | -0.61% | Q1 2026 | May 07, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 161,598 | 1,727 | 0.0% | 0.0% | 14 | +9,629 | 6.34% | Q1 2026 | May 15, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 142,687 | 1,525 | 0.0% | 0.0% | 15 | +70,750 | 98.35% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | Added to | 129,568 | 1,385 | 0.0% | 0.0% | 16 | +6,059 | 4.91% | Q1 2026 | May 14, 2026 |
| North Star Investment Management Corp. | History | Added to | 120,532 | 1,288 | 0.08% | 0.0% | 17 | +116,132 | 2639.36% | Q1 2026 | Apr 23, 2026 |
| MYDA Advisors LLC | History | Added to | 120,000 | 1,282 | 0.21% | 0.24% | 18 | +20,000 | 20.0% | Q1 2026 | May 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 119,253 | 1,274 | 0.0% | — | 19 | +119,253 | New | Q1 2026 | May 08, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | History | New | 100,318 | 1,072 | 0.0% | — | 20 | +100,318 | New | Q1 2026 | May 08, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 84,813 | 906 | 0.0% | 0.0% | 21 | +4,584 | 5.71% | Q1 2026 | May 15, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 79,525 | 850 | 0.0% | 0.0% | 22 | -64,714 | -44.87% | Q1 2026 | May 12, 2026 |
| D. E. Shaw & Co., Inc. | History | Reduced | 62,989 | 673 | 0.0% | 0.0% | 23 | -33,020 | -34.39% | Q1 2026 | May 15, 2026 |
| UBS Group AG | History | Added to | 62,082 | 663 | 0.0% | 0.0% | 24 | +33,118 | 114.34% | Q1 2026 | May 05, 2026 |
| Squarepoint Ops LLC | History | Added to | 51,940 | 555 | 0.0% | 0.0% | 25 | +15,098 | 40.98% | Q1 2026 | May 15, 2026 |
| Pale Fire Capital SE | History | Added to | 48,626 | 519 | 0.05% | 0.04% | 26 | +5,406 | 12.51% | Q1 2026 | May 14, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 45,190 | 483 | 0.0% | 0.0% | 27 | +1,524 | 3.49% | Q1 2026 | May 15, 2026 |
| SIMPLEX TRADING, LLC | History | New | 44,418 | 474 | 0.0% | — | 28 | +44,418 | New | Q1 2026 | May 14, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 43,590 | 465 | 0.0% | 0.0% | 29 | -5,017 | -10.32% | Q1 2026 | May 15, 2026 |
| Bank of New York Mellon Corp | History | Reduced | 40,379 | 431 | 0.0% | 0.0% | 30 | -3,680 | -8.35% | Q1 2026 | May 05, 2026 |
| CORSAIR CAPITAL MANAGEMENT, L.P. | History | Added to | 37,649 | 402 | 0.06% | 0.04% | 31 | +16,000 | 73.91% | Q1 2026 | May 15, 2026 |
| IMC-Chicago, LLC | History | New | 37,133 | 396 | 0.0% | — | 32 | +37,133 | New | Q1 2026 | May 05, 2026 |
| GatePass Capital, LLC | History | Reduced | 29,742 | 317 | 0.15% | 0.42% | 33 | -35,000 | -54.06% | Q1 2026 | May 06, 2026 |
| MORGAN STANLEY | History | Reduced | 26,718 | 285 | 0.0% | 0.0% | 34 | -40,013 | -59.96% | Q1 2026 | May 15, 2026 |
| XTX Topco Ltd | History | New | 23,227 | 248 | 0.0% | — | 35 | +23,227 | New | Q1 2026 | May 15, 2026 |
| Nuveen, LLC | History | No change | 22,454 | 240 | 0.0% | 0.0% | 36 | 0 | 0.0% | Q1 2026 | Apr 30, 2026 |
| RHUMBLINE ADVISERS | History | Reduced | 21,410 | 228 | 0.0% | 0.0% | 37 | -13 | -0.06% | Q1 2026 | May 12, 2026 |
| WELLS FARGO & COMPANY/MN | History | Reduced | 20,830 | 222 | 0.0% | 0.0% | 38 | -11,296 | -35.16% | Q1 2026 | May 11, 2026 |
| Rothschild Wealth LLC | History | Reduced | 20,600 | 220 | 0.02% | 0.2% | 39 | -145,700 | -87.61% | Q1 2026 | May 06, 2026 |
| BROWN ADVISORY INC | History | New | 20,000 | 213 | 0.0% | — | 40 | +20,000 | New | Q1 2026 | May 15, 2026 |
| GUIDANCE CAPITAL, INC | History | Reduced | 16,302 | 210 | 0.05% | 0.06% | 41 | -883 | -5.14% | Q1 2026 | May 08, 2026 |
| BAILARD, INC. | History | No change | 17,800 | 190 | 0.0% | 0.0% | 42 | 0 | 0.0% | Q1 2026 | May 11, 2026 |
| Oxler Private Wealth LLC | History | No change | 17,005 | 181 | 0.06% | 0.06% | 43 | 0 | 0.0% | Q1 2026 | Apr 28, 2026 |
| Quent Capital, LLC | History | No change | 16,199 | 173 | 0.01% | 0.01% | 44 | 0 | 0.0% | Q1 2026 | Apr 28, 2026 |
| GSA CAPITAL PARTNERS LLP | History | New | 16,097 | 172 | 0.01% | — | 45 | +16,097 | New | Q1 2026 | May 08, 2026 |
| OSAIC HOLDINGS, INC. | History | Added to | 16,000 | 171 | 0.0% | 0.0% | 46 | +100 | 0.63% | Q1 2026 | May 15, 2026 |
| DEUTSCHE BANK AG\ | History | Added to | 14,621 | 156 | 0.0% | 0.0% | 47 | +2,628 | 21.91% | Q1 2026 | May 06, 2026 |
| Fermata Advisors, LLC | History | Added to | 12,936 | 138 | 0.03% | 0.04% | 48 | +301 | 2.38% | Q1 2026 | Apr 08, 2026 |
| Greenhaven Road Investment Management, L.P. | History | New | 11,303 | 120 | 0.08% | — | 50 | +11,303 | New | Q1 2026 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | No change | 11,202 | 120 | 0.0% | 0.0% | 49 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Invesco Ltd. | History | New | 11,135 | 119 | 0.0% | — | 51 | +11,135 | New | Q1 2026 | May 12, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | New | 10,692 | 114 | 0.0% | — | 52 | +10,692 | New | Q1 2026 | May 15, 2026 |
| Vident Advisory, LLC | History | New | 10,390 | 111 | 0.0% | — | 53 | +10,390 | New | Q1 2026 | May 14, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Added to | 8,223 | 87 | 0.0% | 0.0% | 54 | +204 | 2.54% | Q1 2026 | May 15, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 7,082 | 73 | 0.0% | 0.0% | 55 | -58 | -0.81% | Q1 2026 | May 13, 2026 |
| Vanguard Global Advisers, LLC | History | New | 5,742 | 61 | 0.0% | — | 56 | +5,742 | New | Q1 2026 | May 08, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | No change | 5,649 | 60 | 0.0% | 0.0% | 57 | 0 | 0.0% | Q1 2026 | Apr 29, 2026 |
| Capital Advisors, Ltd. LLC | History | New | 5,000 | 53 | 0.01% | — | 58 | +5,000 | New | Q1 2026 | Apr 16, 2026 |
| MetLife Investment Management, LLC | History | Reduced | 4,922 | 52 | 0.0% | 0.0% | 59 | -4,232 | -46.23% | Q1 2026 | May 14, 2026 |
| FMR LLC | History | Reduced | 4,726 | 50 | 0.0% | 0.0% | 60 | -978 | -17.15% | Q1 2026 | May 15, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | No change | 4,400 | 47 | 0.0% | 0.0% | 61 | 0 | 0.0% | Q1 2026 | May 06, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 3,669 | 39 | 0.0% | 0.0% | 62 | -151 | -3.95% | Q1 2026 | May 12, 2026 |
| BARCLAYS PLC | History | Reduced | 3,273 | 34 | 0.0% | 0.0% | 63 | -23,708 | -87.87% | Q1 2026 | May 14, 2026 |
| Russell Investments Group, Ltd. | History | Added to | 1,732 | 18 | 0.0% | 0.0% | 64 | +120 | 7.44% | Q1 2026 | May 08, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 1,528 | 16 | 0.0% | 0.0% | 66 | -1,654 | -51.98% | Q1 2026 | May 15, 2026 |
| Legal & General Group Plc | History | Reduced | 1,558 | 16 | 0.0% | 0.0% | 65 | -53 | -3.29% | Q1 2026 | May 08, 2026 |
| Ameritas Investment Partners, Inc. | History | No change | 1,232 | 13 | 0.0% | 0.0% | 67 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Reduced | 936 | 10 | 0.0% | 0.0% | 68 | -129 | -12.11% | Q1 2026 | May 15, 2026 |
| CITIGROUP INC | History | Added to | 819 | 8 | 0.0% | 0.0% | 69 | +428 | 109.46% | Q1 2026 | May 11, 2026 |
| Global Retirement Partners, LLC | History | No change | 500 | 6 | 0.0% | 0.0% | 70 | 0 | 0.0% | Q4 2025 | Feb 06, 2026 |
| Sterling Capital Management LLC | History | Reduced | 501 | 5 | 0.0% | 0.0% | 71 | -359 | -41.74% | Q1 2026 | Apr 22, 2026 |
| Rockefeller Capital Management L.P. | History | No change | 500 | 5 | 0.0% | 0.0% | 72 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| CWM, LLC | History | Added to | 195 | 2 | 0.0% | 0.0% | 73 | +78 | 66.67% | Q1 2026 | May 14, 2026 |
| GAMMA Investing LLC | History | No change | 214 | 2 | 0.0% | 0.0% | 74 | 0 | 0.0% | Q1 2026 | Apr 06, 2026 |
| ROYAL BANK OF CANADA | History | Reduced | 50 | 1 | 0.0% | 0.0% | 75 | -977 | -95.13% | Q1 2026 | May 15, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | New | 140 | 1 | 0.0% | — | 77 | +140 | New | Q1 2026 | May 15, 2026 |
| Optiver Holding B.V. | History | Reduced | 170 | 1 | 0.0% | 0.0% | 76 | -128 | -42.95% | Q1 2026 | May 15, 2026 |
| Informed Momentum Co LLC | History | Closed out | 0 | 0 | — | 0.09% | — | -64,784 | -100.0% | Q1 2026 | May 13, 2026 |
| Ancora Advisors LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -57,927 | -100.0% | Q1 2026 | May 15, 2026 |
| SEI INVESTMENTS CO | History | Closed out | 0 | 0 | — | 0.0% | — | -39,442 | -100.0% | Q1 2026 | May 13, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -38,617 | -100.0% | Q1 2026 | May 15, 2026 |
| ARS Investment Partners, LLC | History | Closed out | 0 | 0 | — | 0.03% | — | -36,145 | -100.0% | Q1 2026 | Apr 16, 2026 |
| LOS ANGELES CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -22,960 | -100.0% | Q1 2026 | May 08, 2026 |
| Brookwood Investment Group LLC | History | Closed out | 0 | 0 | — | 0.03% | — | -20,873 | -100.0% | Q1 2026 | May 04, 2026 |
| HRT FINANCIAL LP | History | Closed out | 0 | 0 | — | 0.0% | — | -14,585 | -100.0% | Q1 2026 | May 14, 2026 |
| FLAGSHIP HARBOR ADVISORS, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -910 | -100.0% | Q1 2026 | Apr 28, 2026 |
| AMALGAMATED BANK | History | Closed out | 0 | 0 | — | 0.0% | — | -544 | -100.0% | Q1 2026 | May 08, 2026 |
| Caitong International Asset Management Co., Ltd | History | New | 14 | 0 | — | — | — | +14 | New | Q1 2026 | May 11, 2026 |
| Arax Advisory Partners | History | Closed out | 0 | 0 | — | — | — | -9 | -100.0% | Q1 2026 | May 13, 2026 |
| EverSource Wealth Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -3 | -100.0% | Q1 2026 | May 15, 2026 |
| Farther Finance Advisors, LLC | History | New | 2 | 0 | — | — | — | +2 | New | Q1 2026 | Apr 07, 2026 |
| ROTHSCHILD INVESTMENT LLC | History | No change | 20 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 07, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | No change | 8 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | No change | 71 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 30, 2026 |
| MORGAN DEMPSEY CAPITAL MANAGEMENT LLC | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 06, 2026 |
| Sunbelt Securities, Inc. | History | No change | 7 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| SBI Securities Co., Ltd. | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 27, 2026 |
| AlphaQuest LLC | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| CoreCap Advisors, LLC | History | No change | 5 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 07, 2026 |
| Torren Management, LLC | History | No change | 53 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 30, 2026 |
| Essential Partners LLC | History | No change | 9 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 21, 2026 |