Perma-Fix Environmental Services (PESI) Short Interest Ratio & Short Volume $12.33 +0.08 (+0.65%) Closing price 07/25/2025 04:00 PM EasternExtended Trading$12.20 -0.13 (-1.05%) As of 07/25/2025 05:59 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 Short Interest Stock AnalysisChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Perma-Fix Environmental Services Short Interest DataPerma-Fix Environmental Services (PESI) has a short interest of 1.06 million shares, representing 6.30% of the float (the number of shares available for trading by the public). This marks a -3.64% decrease in short interest from the previous month. The short interest ratio (days to cover) is 7.0, indicating that it would take 7.0 days of the average trading volume of 143,383 shares to cover all short positions.Current Short Interest1,060,000 sharesPrevious Short Interest1,100,000 sharesChange Vs. Previous Month-3.64%Dollar Volume Sold Short$11.15 millionShort Interest Ratio7.0 Days to CoverLast Record DateJune 30, 2025Outstanding Shares18,450,000 sharesShort Percent of Float6.30%Today's Trading Volume57,873 sharesAverage Trading Volume143,383 sharesToday's Volume Vs. Average40% Short Selling Perma-Fix Environmental Services? Sign up to receive the latest short interest report for Perma-Fix Environmental Services and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPESI Short Interest Over TimePESI Days to Cover Over TimePESI Percentage of Float Shorted Over Time Perma-Fix Environmental Services Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20251,060,000 shares $11.15 million -3.6%6.3%7 $10.52 6/15/20251,100,000 shares $10.98 million -6.8%6.5%6.8 $9.98 5/31/20251,180,000 shares $12.54 million +5.4%8.2%6.3 $10.63 5/15/20251,120,000 shares $10.72 million +6.7%7.8%6.1 $9.57 4/30/20251,050,000 shares $8.61 million -3.7%N/A5.9 $8.20 4/15/20251,090,000 shares $7.82 million +2.8%7.6%6.6 $7.17 3/31/20251,060,000 shares $7.71 million +3.9%7.4%7 $7.27 3/15/20251,020,000 shares $7.44 million -7.3%7.1%7.1 $7.29 2/28/20251,100,000 shares $8.84 million +12.8%7.7%8.8 $8.04 2/15/2025975,500 shares $8.83 million 0.0%6.8%7 $9.05 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. 1/31/2025975,700 shares $9.98 million -8.8%N/A7 $10.23 1/15/20251,070,000 shares $11.57 million +12.6%N/A7.5 $10.81 12/31/2024950,700 shares $10.52 million -11.2%N/A6.7 $11.07 12/15/20241,070,000 shares $12.53 million +1.9%N/A7.8 $11.71 11/30/20241,050,000 shares $14.99 million +1.0%N/A8.7 $14.28 11/15/20241,040,000 shares $13.62 million -2.8%N/A9.4 $13.10 10/31/20241,070,000 shares $14.36 million -10.8%N/A11.3 $13.42 10/15/20241,200,000 shares $16.62 million +1.7%N/A11.9 $13.85 9/30/20241,180,000 shares $14.48 million +9.3%N/A11.2 $12.27 9/15/20241,080,000 shares $12.15 million -6.9%N/A7.2 $11.25 8/31/20241,160,000 shares $12.76 million -1.7%N/A7.6 $11.00 8/15/20241,180,000 shares $13.44 million +21.2%N/A7.4 $11.39 7/31/2024973,500 shares $12.35 million +15.8%N/A6.3 $12.69 7/15/2024841,000 shares $8.45 million +87.0%N/A5.5 $10.05 6/30/2024449,700 shares $4.56 million +51.5%N/A3.2 $10.13 6/15/2024296,900 shares $2.87 million +14.8%N/A2.9 $9.68 5/31/2024258,600 shares $2.70 million +25.3%N/A2.8 $10.44 5/15/2024206,400 shares $2.67 million +109.1%1.9%2.4 $12.92 4/30/202498,700 shares $1.13 million +8.0%0.9%1.4 $11.45 4/15/202491,400 shares $1.03 million -48.2%0.9%1.9 $11.23 3/31/2024176,400 shares $2.10 million +16.4%1.7%4.1 $11.89 3/15/2024151,600 shares $1.40 million -9.1%1.4%4.2 $9.25 2/29/2024166,700 shares $1.32 million +8.4%1.6%5.3 $7.93 2/15/2024153,800 shares $1.33 million -7.6%1.5%3.9 $8.68 1/31/2024166,500 shares $1.32 million -7.6%1.6%3.9 $7.90 1/15/2024180,100 shares $1.58 million -1.5%1.7%3.6 $8.80 12/31/2023182,800 shares $1.44 million -0.1%1.7%3.6 $7.86 12/15/2023182,900 shares $1.53 million -17.7%1.7%3.3 $8.36 11/30/2023222,300 shares $1.62 million -7.6%2.1%3.8 $7.29 11/15/2023240,700 shares $1.91 million +4.5%2.3%4.9 $7.93Elon Musk: “This will transform civilization as we know it.” (Ad)Robots are no longer science fiction — they’re the next trillion-dollar megatrend. According to Forbes, by 2025, robots will shift from novelty to necessity — disrupting nearly every industry in their path. But one overlooked sector could become the real winner… and one little-known company may be the best way to get ahead of the boom.Click here to see the robot stock that could dominate this revolution 10/31/2023230,400 shares $2.14 million +4.3%2.2%4.4 $9.30 10/15/2023220,900 shares $2.16 million -11.9%2.1%3.9 $9.80 9/30/2023250,800 shares $2.62 million +15.5%2.4%4.3 $10.45 9/15/2023217,200 shares $2.47 million -4.1%2.1%4 $11.38 8/31/2023226,400 shares $2.83 million -12.6%2.2%4.1 $12.48 8/15/2023258,900 shares $3.17 million -8.5%2.5%4.4 $12.26 7/31/2023282,800 shares $2.77 million -9.9%2.7%4.4 $9.79 7/15/2023314,000 shares $3.06 million -6.1%3.0%5.1 $9.75 6/30/2023334,300 shares $3.67 million -4.9%3.2%3.8 $10.98 6/15/2023351,400 shares $3.98 million -13.2%3.4%3.1 $11.33 5/31/2023404,900 shares $4.37 million -8.3%3.9%3.2 $10.80 5/15/2023441,500 shares $5.00 million +6.1%4.2%3.4 $11.33 4/30/2023416,200 shares $3.78 million +31.1%4.0%3.1 $9.08 4/15/2023317,600 shares $2.62 million +7.4%3.1%2.4 $8.25 3/31/2023295,600 shares $3.48 million +233.6%2.9%2.8 $11.78 3/15/202388,600 shares $752.21 thousand +116.1%0.9%1.1 $8.49 2/28/202341,000 shares $286.18 thousand -9.5%0.4%0.7 $6.98 2/15/202345,300 shares $291.28 thousand +135.9%0.4%0.9 $6.43 1/31/202319,200 shares $79.68 thousand -15.0%0.2%0.5 $4.15 1/15/202322,600 shares $89.27 thousand +82.3%0.2%0.8 $3.95 12/30/202212,400 shares $43.77 thousand +65.3%0.1%0.4 $3.53 12/15/20227,500 shares $24.94 thousand -21.1%0.1%0.3 $3.33 11/30/20229,500 shares $35.48 thousand +30.1%0.1%0.4 $3.74 11/15/20227,300 shares $30.51 thousand -26.3%0.1%0.4 $4.18 10/31/20229,900 shares $41.18 thousand -9.2%0.1%0.5 $4.16 10/15/202210,900 shares $40.66 thousand -48.6%0.1%0.6 $3.73 9/30/202221,200 shares $94.98 thousand +53.6%0.2%1.4 $4.48 9/15/202213,800 shares $64.58 thousand +7.0%0.1%1.1 $4.68 8/31/202212,900 shares $66.05 thousand -23.2%0.1%1.2 $5.12 8/15/202216,800 shares $88.29 thousand +90.9%0.2%1.8 $5.26 7/31/20228,800 shares $46.38 thousand -29.0%0.1%0.8 $5.27 7/15/202212,400 shares $68.20 thousand +6.9%0.1%1.2 $5.50 6/30/202211,600 shares $60.20 thousand -41.7%0.1%1 $5.19 6/15/202219,900 shares $102.49 thousand +5.3%0.2%1.7 $5.15 5/31/202218,900 shares $104.48 thousand +107.7%0.2%1.4 $5.53 5/15/20229,100 shares $50.96 thousand -58.5%0.1%0.6 $5.60 4/30/202221,900 shares $124.61 thousand +170.4%0.2%1.6 $5.69 4/15/20228,100 shares $44.55 thousand -3.6%0.1%0.6 $5.50 3/31/20228,400 shares $46.45 thousand -44.7%0.1%0.7 $5.53 3/15/202215,200 shares $86.18 thousand -9.5%N/A1.1 $5.67 2/28/202216,800 shares $95.09 thousand -18.8%N/A1.2 $5.66 2/15/202220,700 shares $115.09 thousand -29.4%N/A1.2 $5.56 1/31/202229,300 shares $172.58 thousand +49.5%N/A1.4 $5.89 1/15/202219,600 shares $125.83 thousand +13.3%N/A0.9 $6.42 12/31/202117,300 shares $109.51 thousand +170.3%N/A0.7 $6.33 12/15/20216,400 shares $44.16 thousand -5.9%N/A0.2 $6.90 11/30/20216,800 shares $47.94 thousand -4.2%N/A0.2 $7.05 11/15/20217,100 shares $47.78 thousand -62.4%N/A0.2 $6.73 10/29/202118,900 shares $136.08 thousand -20.3%0.2%0.7 $7.20 10/15/202123,700 shares $163.77 thousand +100.9%0.2%1 $6.91Elon Musk: “This will transform civilization as we know it.” (Ad)Robots are no longer science fiction — they’re the next trillion-dollar megatrend. According to Forbes, by 2025, robots will shift from novelty to necessity — disrupting nearly every industry in their path. But one overlooked sector could become the real winner… and one little-known company may be the best way to get ahead of the boom.Click here to see the robot stock that could dominate this revolution 9/30/202111,800 shares $78.47 thousand -9.2%0.1%0.4 $6.65 9/15/202113,000 shares $83.07 thousand +319.4%0.1%0.5 $6.39 8/31/20213,100 shares $17.89 thousand -40.4%0.0%0.1 $5.77 8/13/20215,200 shares $30.26 thousand +44.4%0.1%0.3 $5.82 7/30/20213,600 shares $20.63 thousand -89.0%0.0%0.2 $5.73 7/15/202132,800 shares $204.18 thousand +837.1%0.3%1.3 $6.23 6/30/20213,500 shares $25.03 thousand -70.1%0.0%0.1 $7.15 6/15/202111,700 shares $81.08 thousand -57.0%0.1%0.4 $6.93 5/28/202127,200 shares $197.20 thousand +91.6%0.3%0.9 $7.25 5/14/202114,200 shares $102.81 thousand -65.0%0.1%0.5 $7.24 4/30/202140,600 shares $305.31 thousand +140.2%0.4%1.2 $7.52 4/15/202116,900 shares $124.72 thousand -46.0%0.2%0.5 $7.38 3/31/202131,300 shares $229.43 thousand +233.0%0.3%1 $7.33 3/15/20219,400 shares $65.14 thousand -55.0%0.1%0.3 $6.93 2/26/202120,900 shares $143.90 thousand +294.3%0.2%0.8 $6.89 2/12/20215,300 shares $33.50 thousand -47.0%0.1%0.2 $6.32 1/29/202110,000 shares $62.70 thousand -48.2%0.1%0.4 $6.27 1/15/202119,300 shares $123.91 thousand +35.0%0.2%0.7 $6.42 12/31/202014,300 shares $85.09 thousand -3.4%0.1%0.6 $5.95 12/15/202014,800 shares $91.91 thousand +19.4%0.1%0.7 $6.21 11/30/202012,400 shares $78.62 thousand -3.1%0.1%0.7 $6.34 11/15/202012,800 shares $86.53 thousand -36.6%0.1%0.8 $6.76 10/30/202020,200 shares $139.99 thousand -9.8%0.2%1.2 $6.93 10/15/202022,400 shares $153.33 thousand +47.4%0.2%1.3 $6.85 9/30/202015,200 shares $107.16 thousand -33.9%0.1%0.8 $7.05 9/15/202023,000 shares $162.38 thousand -8.7%0.2%1 $7.06 8/31/202025,200 shares $180.18 thousand +61.5%0.2%0.8 $7.15 8/14/202015,600 shares $109.36 thousand -28.1%0.2%0.5 $7.01 7/31/202021,700 shares $152.55 thousand +24.7%0.2%0.7 $7.03 PESI Short Interest - Frequently Asked Questions What is Perma-Fix Environmental Services' current short interest? Short interest is the volume of Perma-Fix Environmental Services shares that have been sold short but have not yet been closed out or covered. As of June 30th, investors have sold 1,060,000 shares of PESI short. 6.30% of Perma-Fix Environmental Services' shares are currently sold short. Learn More on Perma-Fix Environmental Services' current short interest. What is a good short interest ratio for Perma-Fix Environmental Services? The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. PESI shares currently have a short interest ratio of 7.0. Learn More on Perma-Fix Environmental Services's short interest ratio. Which institutional investors are shorting Perma-Fix Environmental Services? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Perma-Fix Environmental Services: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Perma-Fix Environmental Services? Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 6.30% of Perma-Fix Environmental Services' floating shares are currently sold short. Is Perma-Fix Environmental Services' short interest increasing or decreasing? Perma-Fix Environmental Services saw a drop in short interest in the month of June. As of June 30th, there was short interest totaling 1,060,000 shares, a drop of 3.6% from the previous total of 1,100,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment. How does Perma-Fix Environmental Services' short interest compare to its competitors? 6.30% of Perma-Fix Environmental Services' shares are currently sold short. Here is how the short interest of companies in the industry of "business services" compare to Perma-Fix Environmental Services: Paysafe Limited (5.95%), Cars.com Inc. (7.15%), NeoGenomics, Inc. (3.61%), NerdWallet, Inc. (4.88%), Montrose Environmental Group, Inc. (9.56%), Enviri Corporation (7.53%), MultiPlan Co. (6.92%), MediaAlpha, Inc. (7.40%), Nexxen International Ltd. Sponsored ADR (4.10%), Nutex Health Inc. (14.62%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($72.10 billion), Invesco QQQ ($26.89 billion), iShares Russell 2000 ETF ($19.61 billion), MicroStrategy Incorporated ($9.52 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), WD-40 Company ($7.66 billion), Technology Select Sector SPDR Fund ($6.10 billion), Invesco S&P 500 Equal Weight ETF ($5.80 billion), Invesco S&P 500 Top 50 ETF ($5.53 billion), and Vanguard Large-Cap ETF ($5.35 billion). View all of the most shorted stocks. What does it mean to sell short Perma-Fix Environmental Services stock? Short selling PESI is an investing strategy that aims to generate trading profit from Perma-Fix Environmental Services as its price is falling. PESI shares are trading up $0.08 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit. How does a short squeeze work against Perma-Fix Environmental Services? A short squeeze for Perma-Fix Environmental Services occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of PESI, which in turn drives the price of the stock up even further. How often is Perma-Fix Environmental Services' short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including PESI, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies PSFE Short Squeeze CARS Short Squeeze NEO Short Squeeze NRDS Short Squeeze MEG Short Squeeze NVRI Short Squeeze MPLN Short Squeeze MAX Short Squeeze NEXN Short Squeeze NUTX Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:PESI) was last updated on 7/26/2025 by MarketBeat.com Staff From Our PartnersTrump's 2025 Economic Revolution Is Here Are Your Retirement Savings Ready?Time is short. 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