PESI Institutional Ownership & Shareholders
PERMA-FIX ENVIRONMENTAL SVCS (PESI) is currently held by 95 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $134.02M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PESI tracked by InsiderSet, reporting ownership valued at approximately $17.90M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $16.14M, representing an estimated loss of -9.87% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 69% of the total disclosed PESI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Mak Capital One Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in PERMA-FIX ENVIRONMENTAL SVCS (PESI).
This page ranks the largest institutional PESI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
95
Total Reported Value
$134.02M
Largest Holder
Blackrock, Inc.
Largest Position
$17.90M
Insider Transactions (90d)
9
Latest Filing Quarter
Q2 2026
New Institutional Positions
116
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 1,252,756 | $17,901,883 | $16,135,497 | -$1,766,386 | -9.87% | |
| Mak Capital One Llc | 2.07% | 1,032,958 | $14,760,970 | $13,304,499 | -$1,456,471 | -9.87% | |
| Vanguard Capital Management Llc | 0.00% | 811,743 | $11,599,807 | $10,455,250 | -$1,144,557 | -9.87% | |
| Diamond Hill Capital Management Inc | 0.07% | 642,533 | $9,181,797 | $8,275,825 | -$905,972 | -9.87% | |
| Kennedy Capital Management Llc | 0.15% | 610,903 | $8,729,804 | $7,868,431 | -$861,373 | -9.87% | |
| Potomac Capital Management, Inc. | 4.99% | 477,000 | $6,816,330 | $6,143,760 | -$672,570 | -9.87% | |
| Geode Capital Management, Llc | 0.00% | 455,156 | $6,506,211 | $5,862,409 | -$643,802 | -9.90% | |
| Heartland Advisors Inc | 0.25% | 400,000 | $5,716,000 | $5,152,000 | -$564,000 | -9.87% | |
| Centerbook Partners Lp | 0.26% | 358,804 | $5,615,283 | $4,621,396 | -$993,887 | -17.70% | |
| State Street Corp | 0.00% | 349,744 | $4,997,842 | $4,504,703 | -$493,139 | -9.87% | |
| Prescott Group Capital Management, L.L.C. | 0.25% | 180,492 | $2,824,700 | $2,324,737 | -$499,963 | -17.70% | |
| Dimensional Fund Advisors Lp | 0.00% | 191,063 | $2,728,619 | $2,460,891 | -$267,728 | -9.81% | |
| Goldman Sachs Group Inc | 0.00% | 162,755 | $2,325,768 | $2,096,284 | -$229,484 | -9.87% | |
| Susquehanna International Group, Llp | 0.00% | 156,934 | $2,242,587 | $2,021,310 | -$221,277 | -9.87% | |
| Citadel Advisors Llc | 0.00% | 152,626 | $2,181,025 | $1,965,823 | -$215,202 | -9.87% | |
| Northern Trust Corp | 0.00% | 141,639 | $2,024,021 | $1,824,310 | -$199,711 | -9.87% | |
| North Star Investment Management Corp. | 0.10% | 120,532 | $1,886,326 | $1,552,452 | -$333,874 | -17.70% | |
| Vanguard Fiduciary Trust Co | 0.00% | 123,040 | $1,758,242 | $1,584,755 | -$173,487 | -9.87% | |
| Group One Trading Llc | 0.05% | 122,611 | $1,752,111 | $1,579,230 | -$172,881 | -9.87% | |
| Vanguard Portfolio Management Llc | 0.00% | 121,267 | $1,732,905 | $1,561,919 | -$170,986 | -9.87% | |
| Diametric Capital, Lp | 0.17% | 114,714 | $1,639,263 | $1,477,516 | -$161,747 | -9.87% | |
| Myda Advisors Llc | 0.31% | 90,000 | $1,286,100 | $1,159,200 | -$126,900 | -9.87% | |
| Cm Wealth Advisors Llc | 0.23% | 87,839 | $1,255,219 | $1,131,366 | -$123,853 | -9.87% | |
| Exchange Traded Concepts, Llc | 0.01% | 79,006 | $1,236,444 | $1,017,597 | -$218,847 | -17.70% | |
| Xtx Topco Ltd | 0.01% | 62,888 | $898,670 | $809,997 | -$88,673 | -9.87% | |
| Owls Nest Partners Ia, Llc | 0.26% | 56,555 | $808,171 | $728,428 | -$79,743 | -9.87% | |
| Pale Fire Capital Se | 0.06% | 55,627 | $794,910 | $716,476 | -$78,434 | -9.87% | |
| Morgan Stanley | 0.00% | 53,084 | $758,571 | $683,722 | -$74,849 | -9.87% | |
| Jane Street Group, Llc | 0.00% | 46,651 | $666,643 | $600,865 | -$65,778 | -9.87% | |
| Charles Schwab Investment Management Inc | 0.00% | 45,249 | $646,608 | $582,807 | -$63,801 | -9.87% | |
| Gatepass Capital, Llc | 0.24% | 44,742 | $639,358 | $576,277 | -$63,081 | -9.87% | |
| Corsair Capital Management, L.P. | 0.08% | 42,649 | $609,454 | $549,319 | -$60,135 | -9.87% | |
| Bank Of America Corp | 0.00% | 41,371 | $591,192 | $532,858 | -$58,334 | -9.87% | |
| Sei Investments Co | 0.00% | 41,022 | $586,204 | $528,363 | -$57,841 | -9.87% | |
| Bank Of New York Mellon Corp | 0.00% | 38,101 | $544,457 | $490,741 | -$53,716 | -9.87% | |
| Simplex Trading, Llc | 0.01% | 31,633 | $452,035 | $407,433 | -$44,602 | -9.87% | |
| Ubs Group Ag | 0.00% | 31,493 | $450,035 | $405,630 | -$44,405 | -9.87% | |
| Squarepoint Ops Llc | 0.00% | 30,976 | $442,647 | $398,971 | -$43,676 | -9.87% | |
| Wells Fargo & Company/Mn | 0.00% | 29,303 | $418,740 | $377,423 | -$41,317 | -9.87% | |
| Creative Planning | 0.00% | 23,169 | $362,595 | $298,417 | -$64,178 | -17.70% | |
| D. E. Shaw & Co., Inc. | 0.00% | 24,858 | $355,221 | $320,171 | -$35,050 | -9.87% | |
| Alliancebernstein L.P. | 0.00% | 32,850 | $351,167 | $423,108 | +$71,941 | +20.49% | |
| Brown Advisory Inc | 0.00% | 23,333 | $333,429 | $300,529 | -$32,900 | -9.87% | |
| Nuveen, Llc | 0.00% | 22,454 | $320,868 | $289,208 | -$31,660 | -9.87% | |
| Trexquant Investment Lp | 0.00% | 21,948 | $313,637 | $282,690 | -$30,947 | -9.87% | |
| Rhumbline Advisers | 0.00% | 20,879 | $298,353 | $268,922 | -$29,431 | -9.86% | |
| Rothschild Wealth Llc | 0.02% | 20,600 | $294,374 | $265,328 | -$29,046 | -9.87% | |
| Bailard, Inc. | 0.01% | 17,800 | $278,570 | $229,264 | -$49,306 | -17.70% | |
| Quadrature Capital Ltd | 0.00% | 18,967 | $271,038 | $244,295 | -$26,743 | -9.87% | |
| Fifth Lane Capital, Lp | 15.77% | 18,000 | $257,220 | $231,840 | -$25,380 | -9.87% |
Frequently asked questions about PESI
Who are the largest institutional holders of PESI?
The largest institutional holders of PESI reported in the latest SEC Form 13F filings include Blackrock, Inc., Mak Capital One Llc, Vanguard Capital Management Llc, Diamond Hill Capital Management Inc, and Kennedy Capital Management Llc. InsiderSet ranks institutional holders by their latest reported PESI position.
What is PESI institutional ownership?
This page tracks PESI positions reported by institutional investment managers through SEC Form 13F. PERMA-FIX ENVIRONMENTAL SVCS (PESI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own PESI?
InsiderSet currently tracks 95 institutional managers reporting PESI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of PESI shareholders.
How much PESI stock do institutions own?
Institutional investment managers disclosed approximately $134.02M in PESI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was PESI institutional ownership last updated?
The latest PESI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional PESI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its PESI position after the reporting date.
Are institutions buying or selling PESI?
Institutional buying and selling can be analyzed by comparing PESI positions across consecutive 13F reporting periods. InsiderSet's PESI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PESI ownership changes.
How has PESI institutional ownership changed over time?
InsiderSet tracks PESI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.