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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.

13F holders, Q4 2025

Institutional positions in Perma Fix Environmental Services Inc as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
84
+7 vs. Q3 2025
Shares held
7.88M
+455.9K (+6.1%) vs. Q3 2025
Total value
$99.2M
+$24.2M (+32.3%) vs. Q3 2025
New holders
14
23 more added
Sold out
7
27 more reduced

Compare with Q3 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting PESI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2025: 84 institutions
Q1 2021: 24 institutionsQ2 2021: 24 institutionsQ3 2021: 24 institutionsQ4 2021: 29 institutionsQ1 2022: 29 institutionsQ2 2022: 29 institutionsQ3 2022: 28 institutionsQ4 2022: 30 institutionsQ1 2023: 32 institutionsQ2 2023: 37 institutionsQ3 2023: 43 institutionsQ4 2023: 43 institutionsQ1 2024: 41 institutionsQ2 2024: 58 institutionsQ3 2024: 68 institutionsQ4 2024: 74 institutionsQ1 2025: 76 institutionsQ2 2025: 70 institutionsQ3 2025: 77 institutionsQ4 2025: 84 institutionsQ1 2026: 85 institutionsQ2 2026: 88 institutions
Value heldQ4 2025: $99.2M
Q1 2021: $23.8MQ2 2021: $22.8MQ3 2021: $21.3MQ4 2021: $22.1MQ1 2022: $20.7MQ2 2022: $19.7MQ3 2022: $17.0MQ4 2022: $12.7MQ1 2023: $41.6MQ2 2023: $35.8MQ3 2023: $34.9MQ4 2023: $27.4MQ1 2024: $36.9MQ2 2024: $48.8MQ3 2024: $71.2MQ4 2024: $81.6MQ1 2025: $49.4MQ2 2025: $70.4MQ3 2025: $75.0MQ4 2025: $99.2MQ1 2026: $80.9MQ2 2026: $135.2M
Institutions holding PESI and their total value by quarter
QuarterHoldersValue
Q2 202688$135.2M
Q1 202685$80.9M
Q4 202584$99.2M
Q3 202577$75.0M
Q2 202570$70.4M
Q1 202576$49.4M
Q4 202474$81.6M
Q3 202468$71.2M
Q2 202458$48.8M
Q1 202441$36.9M
Q4 202343$27.4M
Q3 202343$34.9M
Q2 202337$35.8M
Q1 202332$41.6M
Q4 202230$12.7M
Q3 202228$17.0M
Q2 202229$19.7M
Q1 202229$20.7M
Q4 202129$22.1M
Q3 202124$21.3M
Q2 202124$22.8M
Q1 202124$23.8M

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Perma Fix Environmental Services Inc; share changes are against Q3 2025.

Institutions holding PESI in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.1,197,985$15.1M0.00%+30,253+2.6%Added
Vanguard Group Inc968,107$12.2M0.00%+32,165+3.4%Added
Mak Capital One LLC918,673$11.6M1.56%+103,097+12.6%Added
Prescott Group Capital Management, L.L.C.777,142$9.78M0.91%00.0%Unchanged
Geode Capital Management, LLC422,890$5.33M0.00%+1,655+0.4%Added
Heartland Advisors Inc400,000$5.04M0.27%−58,250−12.7%Reduced
Diamond Hill Capital Management Inc386,843$4.87M0.02%−14,716−3.7%Reduced
Potomac Capital Management, Inc.341,800$4.30M3.60%+341,800New
State Street Corp312,267$3.93M0.00%+13,879+4.7%Added
Perritt Capital Management Inc166,300$2.09M3.50%−9,000−5.1%Reduced
Sentinus, LLC166,300$2.09M0.20%+166,300New
Dimensional Fund Advisors LP164,787$2.08M0.00%+7,934+5.1%Added
Jane Street Group, LLC144,239$1.82M0.00%+86,038+147.8%Added
Northern Trust Corp123,509$1.55M0.00%−11,953−8.8%Reduced
MYDA Advisors LLC100,000$1.26M0.35%+100,000New
Susquehanna International Group, LLP98,269$1.24M0.00%+81,151+474.1%Added
D. E. Shaw & Co., Inc.96,009$1.21M0.00%+49,704+107.3%Added
Goldman Sachs Group Inc71,937$905.7K0.00%+7,683+12.0%Added
Morgan Stanley66,731$840.1K0.00%−32,916−33.0%Reduced
EAM Investors, LLC64,784$815.6K0.09%+64,784New
GatePass Capital, LLC64,742$815.1K0.42%00.0%Unchanged
Ancora Advisors, LLC57,927$729.3K0.02%−92,428−61.5%Reduced
Charles Schwab Investment Management Inc48,607$612.0K0.00%00.0%Unchanged
Bank of New York Mellon Corp44,059$554.7K0.00%−656−1.5%Reduced
Bank of America Corp43,666$549.8K0.00%−4,073−8.5%Reduced
Pale Fire Capital SE43,220$544.1K0.07%−2,050−4.5%Reduced
SEI Investments Co39,442$496.6K0.00%+39,442New
Millennium Management LLC38,617$486.2K0.00%+38,617New
Squarepoint Ops LLC36,842$463.8K0.00%+36,842New
ARS Investment Partners, LLC36,145$455.1K0.03%−4,815−11.8%Reduced
Citadel Advisors LLC36,129$454.9K0.00%−24,035−39.9%Reduced
Wells Fargo & Company32,126$404.5K0.00%+6,465+25.2%Added
UBS Group AG28,964$364.7K0.00%+4,050+16.3%Added
Barclays PLC26,981$339.7K0.00%+2,612+10.7%Added
Los Angeles Capital Management LLC22,960$321.6K0.00%+22,960New
Nuveen, LLC22,454$282.7K0.00%00.0%Unchanged
Corsair Capital Management, L.P.21,649$272.6K0.05%−6,294−22.5%Reduced
Rhumbline Advisers21,423$269.7K0.00%−1,499−6.5%Reduced
Brookwood Investment Group LLC20,873$262.8K0.03%+5,930+39.7%Added
Guidance Capital, Inc17,185$254.7K0.06%−139−0.8%Reduced
Bailard, Inc.17,800$224.1K0.00%−10,800−37.8%Reduced
Oxler Private Wealth LLC17,005$214.1K0.06%00.0%Unchanged
Quent Capital, LLC16,199$203.9K0.01%+16,199New
Advisor Group Holdings, Inc.15,900$200.2K0.00%−20,000−55.7%Reduced
HRT Financial LP14,585$183.0K0.00%+14,585New
Fermata Advisors, LLC12,635$159.1K0.04%−2,688−17.5%Reduced
Deutsche Bank AG11,993$151.0K0.00%+11,930+18,936.5%Added
Price T Rowe Associates Inc11,202$142.0K0.00%+11,202New
MetLife Investment Management9,154$115.2K0.00%+5,784+171.6%Added
Mirae Asset Global ETFs Holdings Ltd.8,019$101.0K0.00%−286−3.4%Reduced
JPMorgan Chase & Co7,140$89.9K0.00%+109+1.6%Added
FMR LLC5,704$71.8K0.00%+1,303+29.6%Added
Police & Firemen's Retirement System of New Jersey5,649$71.1K0.00%00.0%Unchanged
New York State Common Retirement Fund4,400$55.4K0.00%00.0%Unchanged
North Star Investment Management Corp.4,400$55.4K0.00%00.0%Unchanged
Group One Trading, L.P.4,027$50.7K0.00%+501+14.2%Added
BNP Paribas Arbitrage, SA3,820$48.1K0.00%+470+14.0%Added
Tower Research Capital LLC (TRC)3,182$40.1K0.00%+2,182+218.2%Added
Russell Investments Group, Ltd.1,612$20.3K0.00%+28+1.8%Added
Legal & General Group Plc1,611$20.3K0.00%00.0%Unchanged
Ameritas Investment Partners, Inc.1,232$15.5K0.00%00.0%Unchanged
California State Teachers Retirement System1,065$13.4K0.00%−10−0.9%Reduced
Royal Bank of Canada1,027$13.0K0.00%−3,084−75.0%Reduced
Flagship Harbor Advisors, LLC910$11.5K0.00%+910New
Sterling Capital Management LLC860$10.8K0.00%−156−15.4%Reduced
Amalgamated Bank544$7.00K0.00%−39−6.7%Reduced
Rockefeller Capital Management L.P.500$6.29K0.00%00.0%Unchanged
Global Retirement Partners, LLC500$6.29K0.00%+500New
Citigroup Inc391$4.92K0.00%+108+38.2%Added
Optiver Holding B.V.298$3.75K0.00%00.0%Unchanged
GAMMA Investing LLC214$2.69K0.00%−33−13.4%Reduced
CWM, LLC117$1.00K0.00%−19−14.0%Reduced
Nisa Investment Advisors, LLC71$8940.00%00.0%Unchanged
Torren Management, LLC53$6670.00%+53New
Rothschild Investment LLC20$2520.00%00.0%Unchanged
SRS Capital Advisors, Inc.9$1130.00%−217−96.0%Reduced
Essential Partners LLC9$1130.00%00.0%Unchanged
The PNC Financial Services Group, Inc.8$1010.00%00.0%Unchanged
Sunbelt Securities, Inc.7$880.00%00.0%Unchanged
CoreCap Advisors, LLC5$630.00%00.0%Unchanged
EverSource Wealth Advisors, LLC3$380.00%−16−84.2%Reduced
Quest Partners LLC1$130.00%−718−99.9%Reduced
Morgan Dempsey Capital Management LLC1$130.00%00.0%Unchanged
SBI Securities Co., Ltd.1$130.00%00.0%Unchanged
Van Eck Associates Corp0$00.00%−220,289−100.0%Sold out
Essex Investment Management Co LLC0$00.00%−196,197−100.0%Sold out
Legato Capital Management LLC0$00.00%−56,459−100.0%Sold out
Trexquant Investment LP0$00.00%−42,156−100.0%Sold out
Blue Square Asset Management, LLC0$00.00%−20,100−100.0%Sold out
Verition Fund Management LLC0$00.00%−14,456−100.0%Sold out
Simplex Trading, LLC0$00.00%−2,804−100.0%Sold out