Perma-Fix Environmental Services (PESI) Institutional Ownership $11.67 +0.21 (+1.83%) Closing price 04:00 PM EasternExtended Trading$11.57 -0.10 (-0.86%) As of 04:49 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Ownership Stock AnalysisChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Perma-Fix Environmental Services (NASDAQ:PESI)CurrentInstitutional OwnershipPercentage25.52%Number ofInstitutional Buyers(last 12 months)48TotalInstitutional Inflows(last 12 months)$31.82MNumber ofInstitutional Sellers(last 12 months)19TotalInstitutional Outflows(last 12 months)$9.41M Get PESI Insider Trade Alerts Want to know when executives and insiders are buying or selling Perma-Fix Environmental Services stock? 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Email Address Skip Chart & View Institutional Buying and Selling Data PESI Institutional Buying and Selling by Quarter Perma-Fix Environmental Services Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/15/2025 Bank of America Corp DE8,975$94K0.0%-18.2%0.049% 8/14/2025 Jane Street Group LLC22,059$232K0.0%N/A0.119% 8/14/2025 Pale Fire Capital SE25,689$270K0.0%+154.9%0.139% 8/13/2025 Marshall Wace LLP18,405$194K0.0%N/A0.100% 8/13/2025 CW Advisors LLC30,500$321K0.0%+48.8%0.165% 8/12/2025 XTX Topco Ltd18,956$199K0.0%N/A0.103% 8/12/2025 Rhumbline Advisers23,525$247K0.0%+36.7%0.127% 8/11/2025 ARS Investment Partners LLC84,225$886K0.1%+1.2%0.456% 8/8/2025 Geode Capital Management LLC421,959$4.44M0.0%+7.3%2.287% 8/1/2025 Brookwood Investment Group LLC10,134$107K0.0%-39.8%0.055% Get the Latest News and Ratings for PESI and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Perma-Fix Environmental Services and its competitors with MarketBeat's FREE daily newsletter. 7/9/2025 Fermata Advisors LLC16,309$172K0.0%+6.1%0.088% 6/27/2025 Goldman Sachs Group Inc.24,698$180K0.0%-37.5%0.134% 5/29/2025 Rhumbline Advisers17,204$125K0.0%+18.4%0.093% 5/16/2025 Goldman Sachs Group Inc.24,698$180K0.0%-37.5%0.134% 5/16/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.9,849$72K0.0%+18.2%0.053% 5/16/2025 Alyeska Investment Group L.P.147,417$1.07M0.0%-78.9%0.800% 5/16/2025 Ancora Advisors LLC157,845$1.15M0.0%+92.8%0.857% 5/15/2025 Cubist Systematic Strategies LLC10,569$77K0.0%N/A0.057% 5/15/2025 MYDA Advisors LLC200,000$1.45M0.3%-11.1%1.085% 5/14/2025 Corebridge Financial Inc.8,284$60K0.0%+14.7%0.045% 5/14/2025 Pale Fire Capital SE10,080$73K0.0%N/A0.055% 5/14/2025 CW Advisors LLC20,500$149K0.0%N/A0.111% 5/12/2025 Nuveen LLC16,895$123K0.0%N/A0.092% 5/9/2025 Charles Schwab Investment Management Inc.46,244$336K0.0%+14.9%0.251% 5/7/2025 Essex Investment Management Co. LLC191,087$1.39M0.3%-0.6%1.037% 5/7/2025 Heartland Advisors Inc.455,400$3.31M0.2%+13.9%2.471% 5/7/2025 Prescott Group Capital Management L.L.C.777,142$5.65M0.8%+4.0%4.217% 5/6/2025 Brookwood Investment Group LLC16,844$122K0.0%N/A0.091% 5/6/2025 Diamond Hill Capital Management Inc.416,662$3.03M0.0%+32.1%2.261% 4/29/2025 Bank of New York Mellon Corp33,883$246K0.0%+5.5%0.184% 4/23/2025 Oppenheimer & Co. Inc.10,950$80K0.0%-51.8%0.059% 4/8/2025 Rhumbline Advisers17,204$125K0.0%+18.4%0.093% 4/7/2025 GAMMA Investing LLC4,587$33K0.0%N/A0.025% 2/25/2025 Polar Asset Management Partners Inc.175,000$1.94M0.0%N/A1.104% 2/21/2025 Prescott Group Capital Management L.L.C.746,942$8.27M1.1%+4.2%4.713% 2/18/2025 AWM Investment Company Inc.400,000$4.43M0.5%N/A2.524% 2/17/2025 Polar Asset Management Partners Inc.175,000$1.94M0.0%N/A1.104% 2/17/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.8,334$92K0.0%+21.6%0.053% 2/17/2025 Deutsche Bank AG15,479$171K0.0%+4,235.9%0.098% 2/17/2025 Bridgeway Capital Management LLC20,300$225K0.0%-8.1%0.128% The Robotics Revolution has arrived … and one $7 stock could take off as a result. (Ad)Something big is brewing in Washington. According to my research, an executive order from President Trump could be just weeks away. And it holds the potential to trigger one of the most explosive tech booms in US history. At the center of it all? Robots. Not the kind that clean your house or pour you coffee. But the kind that could reshape entire industries, add $1.2 trillion per year to the US economy, and affect 65 million American lives — just in the next year.This little-known company holds nearly 100 patents and trades for around $72/17/2025 Bank of America Corp DE14,789$164K0.0%+34.6%0.093% 2/17/2025 Alyeska Investment Group L.P.700,000$7.75M0.0%N/A4.416% 2/17/2025 Ancora Advisors LLC81,878$906K0.0%-40.1%0.517% 2/14/2025 Northern Trust Corp120,758$1.34M0.0%+7.2%0.762% 2/14/2025 Boothbay Fund Management LLC43,326$480K0.0%N/A0.273% 2/14/2025 Heights Capital Management Inc.20,000$221K0.1%N/A0.126% 2/14/2025 MYDA Advisors LLC225,000$2.49M0.6%N/A1.420% 2/14/2025 Dimensional Fund Advisors LP111,619$1.24M0.0%+25.4%0.704% 2/13/2025 Barclays PLC23,014$255K0.0%+10.6%0.145% 2/13/2025 Renaissance Technologies LLC34,796$385K0.0%-65.1%0.220% 2/13/2025 Wells Fargo & Company MN6,789$75K0.0%-22.6%0.043% 2/12/2025 Perritt Capital Management Inc192,450$2.13M1.1%-0.6%1.214% 2/12/2025 Geode Capital Management LLC327,122$3.62M0.0%+0.6%2.064% 2/12/2025 Diametric Capital LP15,491$171K0.1%-72.2%0.098% 2/12/2025 Heartland Advisors Inc.400,000$4.43M0.2%-20.0%2.524% 2/11/2025 Perkins Capital Management Inc.25,000$277K0.2%N/A0.158% 2/10/2025 Diamond Hill Capital Management Inc.315,517$3.49M0.0%+26.3%1.991% 2/10/2025 Thompson Siegel & Walmsley LLC215,600$2.39M0.0%+5.2%1.360% 2/7/2025 Essex Investment Management Co. LLC192,333$2.13M0.4%-12.5%1.213% 2/7/2025 Prescott Group Capital Management L.L.C.746,942$8.27M0.5%+4.2%4.713% 2/4/2025 Bank of New York Mellon Corp32,126$356K0.0%+13.8%0.203% 1/31/2025 New York State Common Retirement Fund4,400$49K0.0%+4,300.0%0.028% 1/30/2025 Rhumbline Advisers14,533$161K0.0%+23.5%0.092% 1/29/2025 Legato Capital Management LLC57,269$634K0.1%-23.7%0.361% 1/23/2025 Oxler Private Wealth LLC17,005$188K0.1%N/A0.107% 1/22/2025 DHK Financial Advisors Inc.10,966$121K0.1%N/A0.069% 1/17/2025 Commons Capital LLC15,350$170K0.2%-24.6%0.097% 1/16/2025 ARS Investment Partners LLC83,239$921K0.1%-39.7%0.525% 1/16/2025 LVW Advisors LLC10,000$111K0.0%N/A0.063% 1/13/2025 Moody National Bank Trust Division25,000$277K0.0%N/A0.158% 12/26/2024 JPMorgan Chase & Co.6,308$77K0.0%+17.7%0.040% 11/19/2024 Barclays PLC20,806$256K0.0%+388.2%0.131% 11/16/2024 Geode Capital Management LLC325,173$3.99M0.0%+14.0%2.058% 11/15/2024 Barclays PLC20,806$256K0.0%+388.2%0.132% 11/15/2024 Jane Street Group LLC12,159$149K0.0%N/A0.077% 11/15/2024 Wolverine Trading LLC20,816$255K0.0%+36.9%0.132% 11/15/2024 State Street Corp168,644$2.07M0.0%+14.3%1.067% 11/14/2024 MetLife Investment Management LLC7,543$93K0.0%+129.1%0.048% 11/13/2024 BNP Paribas Financial Markets6,994$86K0.0%+54.4%0.044% 11/12/2024 Charles Schwab Investment Management Inc.40,235$494K0.0%+15.0%0.255% 11/12/2024 Thompson Siegel & Walmsley LLC204,859$2.51M0.0%-14.3%1.297% 11/8/2024 Thompson Davis & CO. Inc.14,305$176K0.1%+20.7%0.091% 11/6/2024 Oppenheimer & Co. Inc.22,712$279K0.0%N/A0.144% 11/4/2024 Diamond Hill Capital Management Inc.249,756$3.07M0.0%N/A1.581% 10/29/2024 Van ECK Associates Corp137,858$1.69M0.0%-14.9%0.873% 10/8/2024 Chesley Taft & Associates LLC30,000$368K0.0%N/A0.190% 10/5/2024 Quent Capital LLC16,199$198K0.0%N/A0.103% 8/14/2024 Marshall Wace LLP10,897$110K0.0%N/A0.069% 8/14/2024 Apis Capital Advisors LLC60,000$608K0.4%+30.4%0.380% 8/9/2024 Renaissance Technologies LLC126,896$1.29M0.0%-14.7%0.804% The Robotics Revolution has arrived … and one $7 stock could take off as a result. (Ad)Something big is brewing in Washington. According to my research, an executive order from President Trump could be just weeks away. And it holds the potential to trigger one of the most explosive tech booms in US history. At the center of it all? Robots. Not the kind that clean your house or pour you coffee. But the kind that could reshape entire industries, add $1.2 trillion per year to the US economy, and affect 65 million American lives — just in the next year.This little-known company holds nearly 100 patents and trades for around $78/9/2024 Dimensional Fund Advisors LP78,506$795K0.0%+21.6%0.497% 8/9/2024 Thompson Siegel & Walmsley LLC238,991$2.42M0.0%N/A1.514% 8/8/2024 Perritt Capital Management Inc193,700$1.96M1.1%-1.6%1.227% 8/6/2024 Morgan Dempsey Capital Management LLC25,645$260K0.1%-33.7%0.162% 8/1/2024 Rhumbline Advisers13,200$134K0.0%N/A0.084% 7/31/2024 Van ECK Associates Corp162,003$1.64M0.0%N/A1.026% 7/26/2024 Bank of New York Mellon Corp33,344$338K0.0%N/A0.211% 7/17/2024 ARS Investment Partners LLC144,328$1.46M0.1%-5.3%0.914% 7/13/2024 Fermata Advisors LLC15,086$153K0.0%+22.9%0.096% 5/15/2024 Perritt Capital Management Inc.196,817$2.34M1.3%-0.7%1.433% (Data available from 1/1/2016 forward) PESI Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of PESI shares? During the previous two years, 69 institutional investors and hedge funds held shares of Perma-Fix Environmental Services. The most heavily invested institutionals were Prescott Group Capital Management L.L.C. ($5.65M), Geode Capital Management LLC ($4.44M), AWM Investment Company Inc. ($4.43M), Heartland Advisors Inc. ($3.31M), Potomac Capital Management Inc. ($3.10M), Diamond Hill Capital Management Inc. ($3.03M), and Thompson Siegel & Walmsley LLC ($2.39M).Learn more on Perma-Fix Environmental Services' institutional investors. What percentage of Perma-Fix Environmental Services' stock is owned by institutional investors? 25.52% of Perma-Fix Environmental Services' stock is owned by institutional investors. Learn more on PESI's institutional investor holdings. Which institutional investors have been buying Perma-Fix Environmental Services' stock? Of the 57 institutional investors that purchased Perma-Fix Environmental Services' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Alyeska Investment Group L.P. ($700K), Diamond Hill Capital Management Inc. ($416.66K), AWM Investment Company Inc. ($400K), Polar Asset Management Partners Inc. ($350K), Thompson Siegel & Walmsley LLC ($249.73K), MYDA Advisors LLC ($225K), and Essex Investment Management Co. LLC ($189.45K). How much institutional buying is happening at Perma-Fix Environmental Services? Institutional investors have bought a total of 2,954,894 shares in the last 24 months. This purchase volume represents approximately $31.82M in transactions. Which of Perma-Fix Environmental Services' major shareholders have been selling company stock? Of the 19 institutional investors that sold Perma-Fix Environmental Services' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Alyeska Investment Group L.P. ($552.58K), Heartland Advisors Inc. ($100K), Renaissance Technologies LLC ($65K), ARS Investment Partners LLC ($54.81K), Ancora Advisors LLC ($54.72K), Diametric Capital LP ($40.20K), and Thompson Siegel & Walmsley LLC ($34.13K). How much institutional selling is happening at Perma-Fix Environmental Services? Institutional investors have sold a total of 1,057,133 shares in the last 24 months. This volume of shares sold represents approximately $9.41M in transactions. 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