Energy Recovery (ERII) Short Interest Ratio & Short Volume $12.80 -0.02 (-0.12%) As of 10:33 AM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Energy Recovery Short Interest DataEnergy Recovery (ERII) has a short interest of 938,100 shares, representing 1.78% of the float (the number of shares available for trading by the public). This marks a 0.81% increase in short interest from the previous month. The short interest ratio (days to cover) is 1.8, indicating that it would take 1.8 days of the average trading volume of 422,353 shares to cover all short positions.Current Short Interest938,100 sharesPrevious Short Interest930,600 sharesChange Vs. Previous Month+0.81%Dollar Volume Sold Short$11.52 millionShort Interest Ratio1.8 Days to CoverLast Record DateMay 15, 2025Outstanding Shares54,499,000 sharesFloat Size52,560,000 sharesShort Percent of Float1.78%Today's Trading Volume20,555 sharesAverage Trading Volume422,353 sharesToday's Volume Vs. Average5% Short Selling Energy Recovery? Sign up to receive the latest short interest report for Energy Recovery and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartERII Short Interest Over TimeERII Days to Cover Over TimeERII Percentage of Float Shorted Over Time Energy Recovery Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/2025938,100 shares $11.52 million +0.8%1.8%1.8 $12.28 4/30/2025930,600 shares $14.38 million -16.2%1.8%2.1 $15.45 4/15/20251,110,000 shares $16.74 million -12.6%2.1%2.9 $15.08 3/31/20251,270,000 shares $20.18 million +0.8%2.4%3.5 $15.89 3/15/20251,260,000 shares $20.64 million +8.6%2.4%3.6 $16.38 2/28/20251,160,000 shares $17.35 million -12.8%2.2%3.6 $14.96 2/15/20251,330,000 shares $20.34 million -10.7%2.4%3.6 $15.29 1/31/20251,490,000 shares $21.37 million -10.2%2.7%3.4 $14.34 1/15/20251,660,000 shares $23.85 million +2.5%3.0%3.7 $14.37 12/31/20241,620,000 shares $23.81 million -5.8%2.9%3.4 $14.70 Get the Latest News and Ratings for ERII and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Energy Recovery and its competitors with MarketBeat's FREE daily newsletter. 12/15/20241,720,000 shares $27.71 million +13.2%3.1%3.7 $16.11 11/30/20241,520,000 shares $23.65 million -20.8%2.7%3.3 $15.56 11/15/20241,920,000 shares $36 million -12.7%3.4%4.2 $18.75 10/31/20242,200,000 shares $39.29 million -3.5%3.9%6.3 $17.86 10/15/20242,280,000 shares $41.13 million -0.9%4.1%6 $18.04 9/30/20242,300,000 shares $40.00 million +8.5%4.1%6 $17.39 9/15/20242,120,000 shares $33.98 million -4.5%3.8%5.3 $16.03 8/31/20242,220,000 shares $36.05 million -10.5%4.0%5.5 $16.24 8/15/20242,480,000 shares $42.63 million -6.4%4.4%6.2 $17.19 7/31/20242,650,000 shares $38.64 million +2.3%4.8%6.6 $14.58 7/15/20242,590,000 shares $38.23 million +2.4%4.7%6.6 $14.76 6/30/20242,530,000 shares $33.62 million +6.8%4.6%6.6 $13.29 6/15/20242,370,000 shares $30.41 million -9.9%4.3%6.3 $12.83 5/31/20242,630,000 shares $35.51 million -3.7%4.7%6.5 $13.50 5/15/20242,730,000 shares $38.47 million +9.6%4.9%6.4 $14.09 4/30/20242,490,000 shares $37.10 million +5.1%4.5%5.6 $14.90 4/15/20242,370,000 shares $33.13 million -5.6%4.3%5.4 $13.98 3/31/20242,510,000 shares $39.63 million -2.7%4.6%5.2 $15.79 3/15/20242,580,000 shares $38.24 million -15.1%4.7%5.5 $14.82 2/29/20243,040,000 shares $47.52 million -12.4%5.5%6.7 $15.63 2/15/20243,470,000 shares $56.32 million -3.6%6.3%8.1 $16.23 1/31/20243,600,000 shares $55.84 million +0.3%6.6%8.4 $15.51 1/15/20243,590,000 shares $64.30 million +1.7%6.5%6.9 $17.91 12/31/20233,530,000 shares $66.51 million -0.3%6.4%7.2 $18.84 12/15/20233,540,000 shares $65.74 million -2.5%6.5%6.9 $18.57 11/30/20233,630,000 shares $69.19 million +1.4%6.6%6.9 $19.06 11/15/20233,580,000 shares $69.63 million +4.4%6.5%6.7 $19.45 10/31/20233,430,000 shares $52.14 million +12.1%6.2%6.6 $15.20 10/15/20233,060,000 shares $59.70 million No Change5.6%6.8 $19.51 9/30/20233,060,000 shares $64.90 million +3.4%5.6%7 $21.21The End of Elon Musk…? 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Short interest is the volume of Energy Recovery shares that have been sold short but have not yet been closed out or covered. As of May 15th, traders have sold 938,100 shares of ERII short. 1.78% of Energy Recovery's shares are currently sold short. Learn More on Energy Recovery's current short interest. What is a good short interest ratio for Energy Recovery? 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. ERII shares currently have a short interest ratio of 2.0. Learn More on Energy Recovery's short interest ratio. Which institutional investors are shorting Energy Recovery? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Energy Recovery: 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 Energy Recovery? 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. 1.78% of Energy Recovery's floating shares are currently sold short. Is Energy Recovery's short interest increasing or decreasing? Energy Recovery saw a increase in short interest in May. As of May 15th, there was short interest totaling 938,100 shares, an increase of 0.8% from the previous total of 930,600 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. What is Energy Recovery's float size? Energy Recovery currently has issued a total of 54,499,000 shares. Some of Energy Recovery's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Energy Recovery currently has a public float of 52,560,000 shares. How does Energy Recovery's short interest compare to its competitors? 1.78% of Energy Recovery's shares are currently sold short. Here is how the short interest of companies in the industry of "industrial machinery" compare to Energy Recovery: Albany International Corp. (2.62%), Standex International Co. (2.39%), Kennametal Inc. (4.76%), Tennant (2.82%), TriMas Co. (7.67%), The Gorman-Rupp Company (0.83%), Proto Labs, Inc. (3.59%), Hyster-Yale Materials Handling, Inc. (5.98%), Graham Co. (2.10%), Columbus McKinnon Co. (2.53%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short Energy Recovery stock? Short selling ERII is an investing strategy that aims to generate trading profit from Energy Recovery as its price is falling. ERII shares are trading down $0.02 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 Energy Recovery? A short squeeze for Energy Recovery occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of ERII, which in turn drives the price of the stock up even further. How often is Energy Recovery's 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 ERII, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies AIN Short Interest SXI Short Interest KMT Short Interest TNC Short Interest TRS Short Interest GRC Short Interest PRLB Short Interest HY Short Interest GHM Short Interest CMCO Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:ERII) was last updated on 6/11/2025 by MarketBeat.com Staff From Our PartnersYour Bank Account Is No Longer SafeWhat If Washington Declared That: YOUR Money ISN'T Actually Yours? Sounds insane, but that's exactly what ...Priority Gold | SponsoredMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? 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