PERMA FIX ENVIRONMENTAL SERVICES INC (PESI) — Institutional Holders, Q2 2026
89 institutional investment managers reported a PESI position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $135.2M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
PESI in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- KENNEDY CAPITAL MANAGEMENTNew · +610,903 sh+$8.7M
- DIAMOND HILL CAPITAL MANAGEMENTAdded · +286,555 sh+$4.1M
- Potomac Capital ManagementAdded · +180,300 sh+$2.6M
- SUSQUEHANNA INTERNATIONAL GROUP, LLPAdded · +145,836 sh+$2.1M
- Diametric CapitalNew · +114,714 sh+$1.6M
Biggest sellers
- GROUP ONE TRADING, L.P.Trimmed · -125,063 sh-$1.8M
- D. E. ShawTrimmed · -38,131 sh-$544.9K
- UBS Group AGTrimmed · -30,589 sh-$437.1K
- MYDA AdvisorsTrimmed · -30,000 sh-$428.7K
- Squarepoint OpsTrimmed · -20,964 sh-$299.6K
PESI 13F holders ranked 1–89 of 89
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 1,252,756 sh | 1,252,756 | $17.9M | <0.01% | +7.0% |
| 2 | MAK CAPITAL ONE#2 · 1,032,958 sh | 1,032,958 | $14.8M | 2.07% | +12.4% |
| 3 | VANGUARD CAPITAL MANAGEMENT#3 · 811,743 sh | 811,743 | $11.6M | <0.01% | +6.9% |
| 4 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.#4 · 777,142 sh | 777,142 | $11.1M | 0.96% | 0.0% |
| 5 | DIAMOND HILL CAPITAL MANAGEMENT#5 · 642,533 sh | 642,533 | $9.2M | 0.07% | +80.5% |
| 6 | KENNEDY CAPITAL MANAGEMENT#6 · 610,903 sh | 610,903 | $8.7M | 0.15% | New |
| 7 | Potomac Capital Management#7 · 477,000 sh | 477,000 | $6.8M | 4.65% | +60.8% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 455,156 sh | 455,156 | $6.5M | <0.01% | +5.2% |
| 9 | HEARTLAND ADVISORS#9 · 400,000 sh | 400,000 | $5.7M | 0.25% | 0.0% |
| 10 | STATE STREET#10 · 349,744 sh | 349,744 | $5.0M | <0.01% | +4.2% |
| 11 | DIMENSIONAL FUND ADVISORS#11 · 191,063 sh | 191,063 | $2.7M | <0.01% | +16.7% |
| 12 | GOLDMAN SACHS GROUP#12 · 162,755 sh | 162,755 | $2.3M | <0.01% | +14.1% |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#13 · 156,934 sh | 156,934 | $2.2M | <0.01% | +1314.1% |
| 14 | CITADEL ADVISORS#14 · 152,626 sh | 152,626 | $2.2M | <0.01% | +120.2% |
| 15 | NORTHERN#15 · 141,639 sh | 141,639 | $2.0M | <0.01% | +9.3% |
| 16 | VANGUARD FIDUCIARY#16 · 123,040 sh | 123,040 | $1.8M | <0.01% | +3.2% |
| 17 | GROUP ONE TRADING, L.P.#17 · 122,611 sh | 122,611 | $1.8M | <0.01% | -50.5% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT#18 · 121,267 sh | 121,267 | $1.7M | <0.01% | +20.9% |
| 19 | North Star Investment Management#19 · 120,532 sh | 120,532 | $1.7M | 0.09% | 0.0% |
| 20 | Diametric Capital#20 · 114,714 sh | 114,714 | $1.6M | 0.17% | New |
| 21 | MYDA Advisors#21 · 90,000 sh | 90,000 | $1.3M | 0.19% | -25.0% |
| 22 | CM WEALTH ADVISORS#22 · 87,839 sh | 87,839 | $1.3M | 0.23% | New |
| 23 | XTX Topco Ltd#23 · 62,888 sh | 62,888 | $898.7K | 0.01% | +170.8% |
| 24 | Owls Nest Partners IA#24 · 56,555 sh | 56,555 | $808.2K | 0.26% | New |
| 25 | Pale Fire Capital SE#25 · 55,627 sh | 55,627 | $794.9K | 0.06% | +14.4% |
| 26 | MORGAN STANLEY#26 · 53,084 sh | 53,084 | $758.6K | 0.00% | +98.7% |
| 27 | JANE STREET GROUP#27 · 46,651 sh | 46,651 | $666.6K | <0.01% | +63.5% |
| 28 | CHARLES SCHWAB INVESTMENT MANAGEMENT#28 · 45,249 sh | 45,249 | $646.6K | <0.01% | +3.8% |
| 29 | GatePass Capital#29 · 44,742 sh | 44,742 | $639.4K | 0.24% | +50.4% |
| 30 | CORSAIR CAPITAL MANAGEMENT, L.P.#30 · 42,649 sh | 42,649 | $609.5K | 0.08% | +13.3% |
| 31 | BANK OF AMERICA#31 · 41,371 sh | 41,371 | $591.2K | 0.00% | -8.5% |
| 32 | SEI INVESTMENTS#32 · 41,022 sh | 41,022 | $586.2K | <0.01% | New |
| 33 | Bank of New York Mellon#33 · 38,101 sh | 38,101 | $544.5K | <0.01% | -5.6% |
| 34 | SIMPLEX TRADING#34 · 31,633 sh | 31,633 | $452.0K | <0.01% | +1.0% |
| 35 | UBS Group AG#35 · 31,493 sh | 31,493 | $450.0K | <0.01% | -49.3% |
| 36 | Squarepoint Ops#36 · 30,976 sh | 30,976 | $442.6K | <0.01% | -40.4% |
| 37 | WELLS FARGO & COMPANY#37 · 29,303 sh | 29,303 | $418.7K | <0.01% | +40.7% |
| 38 | D. E. Shaw#38 · 24,858 sh | 24,858 | $355.2K | <0.01% | -60.5% |
| 39 | ALLIANCEBERNSTEIN L.P.#39 · 32,850 sh | 32,850 | $351.2K | <0.01% | New |
| 40 | BROWN ADVISORY#40 · 23,333 sh | 23,333 | $333.4K | <0.01% | +16.7% |
| 41 | Nuveen#41 · 22,454 sh | 22,454 | $320.9K | <0.01% | 0.0% |
| 42 | Trexquant Investment#42 · 21,948 sh | 21,948 | $313.6K | <0.01% | New |
| 43 | RHUMBLINE ADVISERS#43 · 20,879 sh | 20,879 | $298.4K | <0.01% | -2.5% |
| 44 | Sentinus#44 · 20,600 sh | 20,600 | $294.4K | 0.02% | 0.0% |
| 45 | Quadrature Capital Ltd#45 · 18,967 sh | 18,967 | $271.0K | <0.01% | New |
| 46 | FIFTH LANE CAPITAL#46 · 18,000 sh | 18,000 | $257.2K | 15.77% | New |
| 47 | GUIDANCE CAPITAL#47 · 16,683 sh | 16,683 | $256.4K | 0.05% | +2.3% |
| 48 | BAILARD#48 · 17,800 sh | 17,800 | $254.4K | — | 0.0% |
| 49 | Oxler Private Wealth#49 · 17,005 sh | 17,005 | $243.0K | — | 0.0% |
| 50 | IMC-Chicago#50 · 16,465 sh | 16,465 | $235.3K | <0.01% | -2.8% |
| 51 | Quent Capital#51 · 16,199 sh | 16,199 | $231.5K | 0.01% | 0.0% |
| 52 | OSAIC#52 · 15,900 sh | 15,900 | $227.2K | <0.01% | -0.6% |
| 53 | DEUTSCHE BANK AG\#53 · 15,366 sh | 15,366 | $219.6K | <0.01% | +5.1% |
| 54 | PRICE T ROWE ASSOCIATES#54 · 11,681 sh | 11,681 | $167.0K | 0.00% | +4.3% |
| 55 | Vident Advisory#55 · 10,390 sh | 10,390 | $148.5K | <0.01% | 0.0% |
| 56 | MetLife Investment Management#56 · 9,410 sh | 9,410 | $134.5K | <0.01% | +91.2% |
| 57 | Russell Investments Group, Ltd.#57 · 8,731 sh | 8,731 | $124.8K | <0.01% | +404.1% |
| 58 | CITIGROUP#58 · 8,239 sh | 8,239 | $117.7K | 0.00% | +906.0% |
| 59 | MIRAE ASSET GLOBAL ETFS Ltd.#59 · 8,115 sh | 8,115 | $116.0K | <0.01% | -1.3% |
| 60 | JPMORGAN CHASE#60 · 7,469 sh | 7,469 | $98.1K | 0.00% | +5.5% |
| 61 | Vanguard Global Advisers#61 · 5,742 sh | 5,742 | $82.1K | 0.00% | 0.0% |
| 62 | Police & Firemen's Retirement System of New Jersey#62 · 5,649 sh | 5,649 | $80.7K | <0.01% | 0.0% |
| 63 | Capital Advisors, Ltd.#63 · 5,000 sh | 5,000 | $71.0K | <0.01% | 0.0% |
| 64 | NEW YORK STATE COMMON RETIREMENT FUND#64 · 4,400 sh | 4,400 | $62.9K | <0.01% | 0.0% |
| 65 | FMR#65 · 4,181 sh | 4,181 | $59.7K | 0.00% | -11.5% |
| 66 | Persistent Asset Partners Ltd#66 · 3,912 sh | 3,912 | $55.9K | 0.02% | New |
| 67 | BARCLAYS PLC#67 · 2,708 sh | 2,708 | $38.7K | 0.00% | -17.3% |
| 68 | BNP PARIBAS FINANCIAL MARKETS#68 · 2,482 sh | 2,482 | $35.5K | 0.00% | -32.4% |
| 69 | Tower Research Capital (TRC)#69 · 1,784 sh | 1,784 | $25.5K | <0.01% | +16.8% |
| 70 | Legal & General Group Plc#70 · 1,558 sh | 1,558 | $22.3K | 0.00% | 0.0% |
| 71 | Ameritas Investment Partners#71 · 1,232 sh | 1,232 | $17.6K | <0.01% | 0.0% |
| 72 | Global Retirement Partners#72 · 744 sh | 744 | $10.6K | <0.01% | — |
| 73 | ROYAL BANK OF CANADA#73 · 579 sh | 579 | $9.0K | 0.00% | +1058.0% |
| 74 | GAMMA Investing#74 · 214 sh | 214 | $3.1K | — | 0.0% |
| 75 | Sterling Capital Management#75 · 101 sh | 101 | $1.4K | — | -79.8% |
| 76 | SRS Capital Advisors#76 · 90 sh | 90 | $1.3K | 0.00% | New |
| 77 | NISA INVESTMENT ADVISORS#77 · 71 sh | 71 | $1.0K | — | 0.0% |
| 78 | Torren Management#78 · 53 sh | 53 | $757.00 | <0.01% | 0.0% |
| 79 | Integrated Wealth Concepts#79 · 48 sh | 48 | $686.00 | 0.00% | New |
| 80 | Caitong International Asset Management , Ltd#80 · 48 sh | 48 | $686.00 | <0.01% | +242.9% |
| 81 | EverSource Wealth Advisors#81 · 32 sh | 32 | $457.00 | 0.00% | New |
| 82 | ROTHSCHILD INVESTMENT#82 · 20 sh | 20 | $286.00 | 0.00% | 0.0% |
| 83 | Essential Partners#83 · 9 sh | 9 | $129.00 | — | 0.0% |
| 84 | Allworth Financial#84 · 5 sh | 5 | $72.00 | 0.00% | New |
| 85 | CoreCap Advisors#85 · 5 sh | 5 | $71.00 | — | 0.0% |
| 86 | Optiver Holding B.V.#86 · 2 sh | 2 | $29.00 | 0.00% | -98.8% |
| 87 | MORGAN DEMPSEY CAPITAL MANAGEMENT#87 · 1 sh | 1 | $14.00 | 0.00% | 0.0% |
| 88 | SBI Securities , Ltd.#88 · 1 sh | 1 | $14.00 | — | 0.0% |
| 89 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM#89 · 243 sh | 243 | — | — | -74.0% |
Funds that sold out of PESI in Q2 2026 (9)
Held PESI at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| GSA CAPITAL PARTNERS LLP16,097 sh | 16,097 | $172.0K |
| Fermata Advisors12,936 sh | 12,936 | $138.3K |
| Greenhaven Road Investment Management, L.P.11,303 sh | 11,303 | $120.5K |
| Invesco Ltd.11,135 sh | 11,135 | $119.0K |
| AMERICAN CENTURY COMPANIES10,692 sh | 10,692 | $114.3K |
| Rockefeller Capital Management L.P.500 sh | 500 | $5.3K |
| JONES FINANCIAL COMPANIES LLLP140 sh | 140 | $1.5K |
| PNC FINANCIAL SERVICES GROUP8 sh | 8 | $86.00 |
| Farther Finance Advisors2 sh | 2 | $22.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.