Clean Harbors (CLH) Short Interest Ratio & Short Volume $226.64 -0.85 (-0.37%) Closing price 03:59 PM EasternExtended Trading$230.69 +4.05 (+1.79%) As of 05:14 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 AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Clean Harbors Short Interest DataClean Harbors (CLH) has a short interest of 734,800 shares, representing 1.45% of the float (the number of shares available for trading by the public). This marks a -18.82% decrease in short interest from the previous month. The short interest ratio (days to cover) is 1.7, indicating that it would take 1.7 days of the average trading volume of 350,676 shares to cover all short positions.Current Short Interest734,800 sharesPrevious Short Interest905,100 sharesChange Vs. Previous Month-18.82%Dollar Volume Sold Short$166.72 millionShort Interest Ratio1.7 Days to CoverLast Record DateMay 31, 2025Outstanding Shares53,580,000 sharesFloat Size50,660,000 sharesShort Percent of Float1.45%Today's Trading Volume249,385 sharesAverage Trading Volume350,676 sharesToday's Volume Vs. Average71% Short Selling Clean Harbors? Sign up to receive the latest short interest report for Clean Harbors and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCLH Short Interest Over TimeCLH Days to Cover Over TimeCLH Percentage of Float Shorted Over Time Clean Harbors Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/31/2025734,800 shares $166.72 million -18.8%1.5%1.7 $226.89 5/15/2025905,100 shares $207.70 million +6.4%1.8%1.9 $229.48 4/30/2025850,600 shares $182.11 million +7.2%1.7%1.6 $214.10 4/15/2025793,200 shares $163.39 million +28.8%1.6%1.6 $205.99 3/31/2025615,700 shares $121.35 million -17.8%1.2%1.3 $197.10 3/15/2025748,700 shares $144.58 million +28.0%1.5%1.7 $193.11 2/28/2025585,100 shares $124.77 million +17.0%1.2%1.4 $213.24 2/15/2025500,300 shares $114.81 million -1.1%1.0%1.3 $229.49 1/31/2025506,000 shares $117.86 million -13.7%1.0%1.7 $232.93 1/15/2025586,500 shares $138.95 million +8.6%1.2%1.8 $236.91 Get the Latest News and Ratings for CLH and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Clean Harbors and its competitors with MarketBeat's FREE daily newsletter. 12/31/2024540,100 shares $124.30 million -9.3%1.1%1.7 $230.14 12/15/2024595,700 shares $145.52 million +1.4%1.2%2 $244.28 11/30/2024587,400 shares $152.78 million -8.1%1.2%2.1 $260.09 11/15/2024639,400 shares $158.10 million +22.4%1.3%2.4 $247.27 10/31/2024522,600 shares $120.88 million +29.3%1.0%2 $231.31 10/15/2024404,300 shares $103.17 million -16.1%0.8%1.8 $255.18 9/30/2024481,600 shares $116.54 million -13.4%1.0%2 $241.99 9/15/2024555,900 shares $135.62 million +2.3%1.1%2.1 $243.97 8/31/2024543,200 shares $133.57 million +2.4%1.1%1.9 $245.90 8/15/2024530,300 shares $126.06 million -5.7%1.1%1.8 $237.72 7/31/2024562,300 shares $134.41 million +4.1%1.1%1.9 $239.04 7/15/2024540,400 shares $123.51 million -4.3%1.1%1.8 $228.55 6/30/2024564,500 shares $127.66 million -0.4%1.1%1.9 $226.15 6/15/2024566,700 shares $125.22 million +7.7%1.1%1.9 $220.97 5/31/2024526,300 shares $113.98 million -16.3%1.0%1.8 $216.57 5/15/2024628,600 shares $133.71 million +19.4%1.2%2.1 $212.71 4/30/2024526,700 shares $99.73 million -21.5%1.0%1.6 $189.34 4/15/2024671,300 shares $130.60 million +19.5%1.3%2.1 $194.55 3/31/2024561,800 shares $113.10 million +8.7%1.1%1.8 $201.31 3/15/2024517,000 shares $97.21 million +1.4%1.0%1.6 $188.02 2/29/2024509,700 shares $92.79 million -7.6%1.0%1.6 $182.04 2/15/2024551,300 shares $102.43 million +0.0%1.1%1.6 $185.79 1/31/2024551,100 shares $92.56 million -14.8%1.1%1.7 $167.96 1/15/2024647,000 shares $107.67 million -20.8%1.3%2 $166.42 12/31/2023817,300 shares $142.63 million -21.4%1.6%2.5 $174.51 12/15/20231,040,000 shares $181.72 million -5.5%2.1%3.5 $174.73 11/30/20231,100,000 shares $177.74 million -17.3%2.2%3.8 $161.58 11/15/20231,330,000 shares $219.33 million +25.5%2.6%4.9 $164.91 10/31/20231,060,000 shares $163.05 million -2.8%2.1%3.8 $153.82 10/15/20231,090,000 shares $173.75 million +6.9%2.2%4 $159.40Elon’s BIGGEST warning yet? 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Click here to see why Tesla's about to prove everyone wrong... again. 9/30/20231,020,000 shares $170.71 million -3.8%2.0%3.5 $167.36 9/15/20231,060,000 shares $178.29 million -7.8%2.1%3.4 $168.20 8/31/20231,150,000 shares $194.82 million -9.5%2.3%3.3 $169.41 8/15/20231,270,000 shares $221.27 million +15.5%2.5%3.4 $174.23 7/31/20231,100,000 shares $182.89 million +4.8%2.2%2.9 $166.26 7/15/20231,050,000 shares $173.53 million +8.9%2.1%2.7 $165.27 6/30/2023963,800 shares $158.38 million -10.8%1.9%2.5 $164.33 6/15/20231,080,000 shares $168.49 million +18.1%2.1%2.8 $156.01 5/31/2023914,900 shares $128.42 million +16.1%1.8%2.2 $140.36 5/15/2023788,300 shares $109.99 million +26.8%1.6%1.8 $139.53 4/30/2023621,800 shares $90.26 million +23.4%1.2%1.4 $145.16 4/15/2023504,100 shares $72.36 million +3.6%1.0%1.3 $143.54 3/31/2023486,400 shares $69.34 million -28.7%1.0%1.2 $142.56 3/15/2023682,100 shares $90.77 million +29.0%1.4%1.9 $133.07 2/28/2023528,700 shares $69.83 million -6.2%1.1%1.6 $132.07 2/15/2023563,800 shares $75.22 million +13.6%1.1%1.8 $133.41 1/31/2023496,400 shares $64.68 million +2.5%1.0%1.5 $130.30 1/15/2023484,100 shares $58.76 million +12.3%1.0%1.3 $121.38 12/30/2022431,000 shares $49.19 million -28.4%0.9%1.2 $114.12 12/15/2022602,000 shares $70.13 million -4.9%1.2%1.5 $116.50 11/30/2022632,800 shares $75.94 million -7.8%1.3%1.5 $120.00 11/15/2022686,000 shares $76.74 million -2.2%1.4%1.6 $111.86 10/31/2022701,200 shares $85.87 million -17.1%1.4%1.7 $122.46 10/15/2022845,300 shares $96.67 million -0.5%1.7%2.1 $114.36 9/30/2022849,100 shares $93.38 million +4.0%1.7%2.3 $109.98 9/15/2022816,500 shares $98.23 million +22.3%1.6%2.3 $120.31 8/31/2022667,900 shares $78.42 million +4.9%1.3%2.1 $117.42 8/15/2022636,700 shares $74.07 million +28.7%1.3%2 $116.33 7/31/2022494,800 shares $48.29 million +0.7%1.0%1.4 $97.59 7/15/2022491,200 shares $42.62 million -7.2%1.0%1.4 $86.76 6/30/2022529,000 shares $46.38 million -2.5%1.1%1.4 $87.67 6/15/2022542,300 shares $47.04 million -17.1%1.1%1.3 $86.75 5/31/2022654,200 shares $61.10 million -16.3%1.3%1.4 $93.40 5/15/2022782,000 shares $71.04 million +1.2%1.6%1.6 $90.85 4/30/2022772,900 shares $81.10 million +32.6%1.5%1.5 $104.93 4/15/2022582,900 shares $62.87 million -39.0%1.2%1.2 $107.86 3/31/2022955,900 shares $106.72 million +7.0%1.9%2 $111.64 3/15/2022893,200 shares $94.47 million -22.3%1.8%2 $105.77 2/28/20221,150,000 shares $109.74 million -36.1%2.3%2.9 $95.43 2/15/20221,800,000 shares $173.29 million +55.2%3.6%4.8 $96.27 1/31/20221,160,000 shares $107.36 million +45.2%2.3%3.5 $92.55 1/15/2022798,700 shares $77.10 million +27.6%1.6%2.3 $96.53 12/31/2021626,100 shares $62.47 million +6.1%1.2%1.8 $99.77 12/15/2021589,900 shares $58.24 million -15.6%1.2%1.8 $98.73 11/30/2021698,500 shares $70.86 million -4.9%1.4%2.3 $101.44 11/15/2021734,100 shares $78.47 million -24.0%1.5%2.6 $106.89 10/29/2021965,600 shares $108.67 million +13.3%1.9%3.6 $112.54 10/15/2021852,400 shares $91.99 million +8.5%1.7%3.4 $107.92 9/30/2021785,500 shares $81.59 million +1.0%1.6%3.2 $103.87 9/15/2021777,500 shares $78.36 million +1.6%1.6%3.1 $100.78Trump wipes out trillions overnight… (Ad)Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out nearly $5 trillion in wealth from the S&P 500 and $6.4 trillion from the Dow Jones… Not to mention the countless trillions of dollars lost in every market around the world… leaving the major political powers scrambling in fear of Trump’s next move.Whether you take some of that wealth for yourself depends on if you watch this controversial exposé 8/31/2021765,500 shares $78.56 million -8.0%1.5%3.1 $102.62 8/13/2021832,100 shares $84.69 million +1.9%1.7%3.2 $101.78 7/30/2021816,800 shares $77.60 million -13.1%1.6%3 $95.00 7/15/2021940,400 shares $86.23 million +19.0%1.9%3.6 $91.70 6/30/2021790,200 shares $73.60 million -3.4%1.6%3 $93.14 6/15/2021818,300 shares $76.34 million +23.9%1.6%3.1 $93.29 5/28/2021660,700 shares $61.51 million +21.3%1.3%2.4 $93.10 5/14/2021544,900 shares $50.41 million -3.3%1.1%1.9 $92.52 4/30/2021563,200 shares $50.63 million -2.3%1.1%2 $89.89 4/15/2021576,300 shares $50.37 million -13.7%1.1%2.1 $87.40 3/31/2021667,900 shares $56.64 million +5.9%1.3%2.3 $84.80 3/15/2021630,800 shares $56.90 million +0.6%1.3%2.1 $90.20 2/26/2021627,000 shares $54.53 million -6.5%1.2%2.2 $86.97 2/12/2021670,600 shares $57.06 million -8.6%1.3%2.5 $85.09 1/29/2021733,300 shares $58.35 million +5.5%1.4%2.4 $79.57 1/15/2021695,300 shares $56.98 million +3.3%1.4%2.3 $81.95 12/31/2020673,400 shares $50.67 million +3.0%1.3%2.3 $75.25 12/15/2020653,600 shares $47.12 million -16.1%1.3%2.2 $72.10 11/30/2020779,000 shares $58.11 million +2.2%1.5%2.6 $74.60 11/15/2020762,600 shares $54.49 million +13.3%1.5%2.5 $71.45 10/30/2020673,100 shares $35.84 million +3.8%1.3%2.3 $53.25 10/15/2020648,600 shares $38.35 million -3.7%1.3%2.6 $59.12 9/30/2020673,300 shares $37.72 million -14.0%1.3%2.6 $56.03 9/15/2020782,500 shares $44.85 million +22.4%1.5%2.9 $57.31 8/31/2020639,400 shares $39.07 million +17.5%1.3%2.3 $61.10 8/14/2020544,100 shares $34.50 million -2.1%1.1%1.8 $63.41 7/31/2020556,000 shares $33.14 million -17.1%1.1%1.7 $59.60 7/15/2020670,800 shares $38.94 million -29.5%1.3%1.8 $58.05 6/30/2020951,600 shares $56.75 million -21.4%1.9%2.3 $59.64 6/15/20201,210,000 shares $72.49 million +8.0%2.4%2.5 $59.91 CLH Short Interest - Frequently Asked Questions What is Clean Harbors' current short interest? Short interest is the volume of Clean Harbors shares that have been sold short but have not yet been closed out or covered. As of May 31st, traders have sold 734,800 shares of CLH short. 1.45% of Clean Harbors' shares are currently sold short. Learn More on Clean Harbors' current short interest. What is a good short interest ratio for Clean Harbors? 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. CLH shares currently have a short interest ratio of 2.0. Learn More on Clean Harbors's short interest ratio. Which institutional investors are shorting Clean Harbors? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Clean Harbors: Jane Street Group LLC, Brant Point Investment Management LLC, Walleye Trading LLC, Walleye Capital LLC, Arrowpoint Investment Partners Singapore Pte. Ltd., Simplex Trading LLC, and Fulcrum Asset Management LLP. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Clean Harbors? 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. 1.45% of Clean Harbors' floating shares are currently sold short. Is Clean Harbors' short interest increasing or decreasing? Clean Harbors saw a decrease in short interest during the month of May. As of May 31st, there was short interest totaling 734,800 shares, a decrease of 18.8% from the previous total of 905,100 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 Clean Harbors' float size? Clean Harbors currently has issued a total of 53,580,000 shares. Some of Clean Harbors' 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. Clean Harbors currently has a public float of 50,660,000 shares. How does Clean Harbors' short interest compare to its competitors? 1.45% of Clean Harbors' shares are currently sold short. Here is how the short interest of companies compare to Clean Harbors: Rollins, Inc. (2.43%), Tetra Tech, Inc. (3.69%), Casella Waste Systems, Inc. (3.97%), ABM Industries Incorporated (2.22%), Team, Inc. (0.45%), Waste Management, Inc. (0.83%), Republic Services, Inc. (1.47%), Perma-Fix Environmental Services, Inc. (8.22%), Li-Cycle Holdings Corp. (5.86%), CDT Environmental Technology Investment Holdings Limited (1.91%), 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 ($64.96 billion), Invesco QQQ ($27.88 billion), iShares Russell 2000 ETF ($19.94 billion), iShares 20+ Year Treasury Bond ETF ($9.69 billion), Strategy Incorporated ($8.58 billion), SPDR S&P Biotech ETF ($5.72 billion), Invesco S&P 500 Equal Weight ETF ($5.45 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.70 billion), Charter Communications, Inc. ($4.54 billion), and Industrial Select Sector SPDR Fund ($4.49 billion). View all of the most shorted stocks. What does it mean to sell short Clean Harbors stock? Short selling CLH is an investing strategy that aims to generate trading profit from Clean Harbors as its price is falling. CLH shares are trading down $0.75 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 Clean Harbors? A short squeeze for Clean Harbors 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 CLH, which in turn drives the price of the stock up even further. How often is Clean Harbors' 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 CLH, twice per month. The most recent reporting period available is May, 31 2025. More Short Interest Resources from MarketBeat Related Companies Rollins Short Squeeze Tetra Tech Short Squeeze Casella Waste Systems Short Squeeze ABM Industries Short Squeeze Team Short Squeeze Waste Management Short Squeeze Republic Services Short Squeeze Perma-Fix Environmental Services Short Squeeze Li-Cycle Short Squeeze CDT Environmental Technology Investment Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:CLH) was last updated on 6/13/2025 by MarketBeat.com Staff From Our PartnersUtah’s New Oil FindThe Real Reason 218,000 Acres Just Vanished The government just quietly leased 218,000 acres in the middle ...Stansberry Research | SponsoredWhy July 22nd Could Mean Big Changes for Social SecurityIn a stunning move, President Trump has authorized an AI-led transformation of federal agencies, including Soc...Altimetry | SponsoredTrump’s treachery Trump’s Final Reset Inside the shocking plot to re-engineer America’s financial system…and why you need to ...Porter & Company | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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