Advanced Drainage Systems (WMS) Short Interest Ratio & Short Volume $140.91 +2.55 (+1.84%) Closing price 10/8/2025 03:59 PM EasternExtended Trading$141.56 +0.65 (+0.46%) As of 07:00 AM 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Advanced Drainage Systems Short Interest DataAdvanced Drainage Systems (WMS) has a short interest of 3.80 million shares, representing 5.33% of the float (the number of shares available for trading by the public). This marks a -5.24% decrease in short interest from the previous month. The short interest ratio (days to cover) is 4.6, indicating that it would take 4.6 days of the average trading volume of 739,272 shares to cover all short positions.Current Short Interest3,800,000 sharesPrevious Short Interest4,010,000 sharesChange Vs. Previous Month-5.24%Dollar Volume Sold Short$542.77 millionShort Interest Ratio4.6 Days to CoverLast Record DateSeptember 15, 2025Outstanding Shares77,750,000 sharesFloat Size71,300,000 sharesShort Percent of Float5.33%Today's Trading Volume661,234 sharesAverage Trading Volume739,272 sharesToday's Volume Vs. Average89% Short Selling Advanced Drainage Systems? Sign up to receive the latest short interest report for Advanced Drainage Systems and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartWMS Short Interest Over TimeWMS Days to Cover Over TimeWMS Percentage of Float Shorted Over Time Advanced Drainage Systems Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/15/20253,800,000 shares $542.77 million -5.2%5.3%4.6 $142.84 8/31/20254,010,000 shares $578.19 million -2.9%5.6%4.8 $144.19 8/15/20254,130,000 shares $573.99 million -6.6%5.8%5.1 $138.98 7/31/20254,420,000 shares $506.94 million +19.1%6.2%5.5 $114.69 7/15/20253,710,000 shares $421.09 million +168.8%5.2%5.1 $113.50 6/30/20251,380,000 shares $158.59 million -53.2%8.8%10 $114.92 6/15/20252,950,000 shares $333.50 million -8.4%4.1%4.2 $113.05 5/31/20253,220,000 shares $353.91 million +22.9%4.5%4.7 $109.91 5/15/20252,620,000 shares $309.71 million -4.0%3.7%3.9 $118.21 4/30/20252,730,000 shares $309.99 million +14.7%3.8%4.3 $113.55 Get the Latest News and Ratings for WMS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Advanced Drainage Systems and its competitors with MarketBeat's FREE daily newsletter. 4/15/20252,380,000 shares $249.61 million +3.0%3.4%3.7 $104.88 3/31/20252,310,000 shares $250.91 million -6.1%3.3%3.5 $108.62 3/15/20252,460,000 shares $267.50 million -6.1%3.5%3.7 $108.74 2/28/20252,620,000 shares $291.59 million +19.6%3.7%4 $111.30 2/15/20252,190,000 shares $277.77 million +4.8%3.1%3.4 $126.84 1/31/20252,090,000 shares $252.43 million +8.3%2.9%3 $120.78 1/15/20251,930,000 shares $236.43 million +7.8%2.7%3.1 $122.50 12/31/20241,790,000 shares $206.92 million -9.6%2.5%3.1 $115.60 12/15/20241,980,000 shares $250.83 million -9.2%2.8%3.4 $126.68 11/30/20242,180,000 shares $294.93 million +26.0%3.1%4 $135.29 11/15/20241,730,000 shares $227.24 million -8.5%2.4%3.4 $131.36 10/31/20241,890,000 shares $283.27 million +17.4%2.7%3.9 $149.88 10/15/20241,610,000 shares $249.45 million -11.1%2.3%3.2 $154.94 9/30/20241,810,000 shares $284.31 million +18.3%2.6%3.4 $157.08 9/15/20241,530,000 shares $225.80 million -8.9%2.2%2.8 $147.58 8/31/20241,680,000 shares $263.36 million +15.1%2.4%3 $156.76 8/15/20241,460,000 shares $217.67 million -4.6%2.1%2.6 $149.09 7/31/20241,530,000 shares $270.87 million +5.5%2.2%2.7 $177.04 7/15/20241,450,000 shares $240.15 million +5.1%2.1%2.9 $165.62 6/30/20241,380,000 shares $221.34 million +26.6%2.0%2.8 $160.39 6/15/20241,090,000 shares $186.23 million +11.3%1.6%2.4 $170.85 5/31/2024979,300 shares $170.08 million +3.1%1.4%2.1 $173.67 5/15/2024949,600 shares $167.29 million -22.8%1.4%2.1 $176.17 4/30/20241,230,000 shares $193.04 million -2.4%1.8%2.6 $156.94 4/15/20241,260,000 shares $204.78 million +6.8%1.8%2.7 $162.52 3/31/20241,180,000 shares $203.24 million -15.7%1.7%2.5 $172.24 3/15/20241,400,000 shares $228.59 million -4.8%2.0%2.9 $163.28 2/29/20241,470,000 shares $239.95 million -5.2%2.1%3 $163.23 2/15/20241,550,000 shares $254.08 million -25.5%2.3%3.3 $163.92 1/31/20242,080,000 shares $271.27 million -2.4%3.1%4.5 $130.42 1/15/20242,130,000 shares $273.04 million -13.4%3.2%4.4 $128.19 12/31/20232,460,000 shares $345.97 million -16.3%3.7%5 $140.64 12/15/20232,940,000 shares $413.33 million +5.8%4.4%5.5 $140.59 11/30/20232,780,000 shares $336.44 million +2.2%4.1%5.2 $121.02 11/15/20232,720,000 shares $324.99 million -13.1%4.0%4.8 $119.48 10/31/20233,130,000 shares $334.38 million -4.3%4.7%5.3 $106.83 10/15/20233,270,000 shares $379.29 million -6.8%4.8%5.3 $115.99 9/30/20233,510,000 shares $399.54 million +1.2%5.2%5.6 $113.83 9/15/20233,470,000 shares $414.56 million -11.5%5.1%5.7 $119.47 8/31/20233,920,000 shares $502.31 million +8.6%5.8%6.1 $128.14 8/15/20233,610,000 shares $467.46 million +2.0%5.2%5.4 $129.49 7/31/20233,540,000 shares $431.84 million -11.1%5.1%5.2 $121.99 7/15/20233,980,000 shares $473.42 million -6.1%6.0%6.2 $118.95 6/30/20234,240,000 shares $482.43 million -17.2%6.4%6.7 $113.78 6/15/20235,120,000 shares $566.89 million +7.6%7.7%7.9 $110.72 5/31/20234,760,000 shares $460.72 million +5.5%7.2%5.3 $96.79 5/15/20234,510,000 shares $395.17 million +3.7%6.8%4.8 $87.62 4/30/20234,350,000 shares $372.88 million -7.1%6.4%4.6 $85.72 4/15/20234,680,000 shares $381.23 million -8.1%6.9%4.4 $81.46 3/31/20235,090,000 shares $428.63 million +42.6%7.5%4.7 $84.21 3/15/20233,570,000 shares $284.81 million No Change5.1%3.3 $79.78 2/28/20233,570,000 shares $316.77 million No Change5.1%4.2 $88.73 2/15/20233,570,000 shares $342.40 million +1.7%5.1%4.3 $95.91 1/31/20233,510,000 shares $353.95 million +6.4%N/A3.9 $100.84 1/15/20233,300,000 shares $292.81 million -5.4%N/A3.7 $88.73 12/30/20223,490,000 shares $286.08 million +14.8%N/A4 $81.97 12/15/20223,040,000 shares $267.52 million -5.3%N/A3.6 $88.00 11/30/20223,210,000 shares $312.20 million -3.9%N/A3.9 $97.26 11/15/20223,340,000 shares $297.19 million +20.6%N/A4.1 $88.98 10/31/20222,770,000 shares $320.99 million +18.4%N/A3.6 $115.88 10/15/20222,340,000 shares $280.22 million +22.5%N/A3.4 $119.75 9/30/20221,910,000 shares $237.55 million +60.5%N/A2.8 $124.37 9/15/20221,190,000 shares $160.53 million -27.4%N/A1.8 $134.90 8/31/20221,640,000 shares $222.55 million +1.2%N/A2.2 $135.70 8/15/20221,620,000 shares $243.78 million -17.4%N/A2.3 $150.48 7/31/20221,960,000 shares $232.46 million +27.3%N/A3 $118.60 7/15/20221,540,000 shares $145.08 million -7.8%N/A2.7 $94.21 6/30/20221,670,000 shares $150.42 million +36.9%N/A3.1 $90.07 6/15/20221,220,000 shares $113.55 million -34.8%N/A2.4 $93.07 5/31/20221,870,000 shares $204.78 million +28.1%2.6%4.4 $109.51 5/15/20221,460,000 shares $147.80 million +2.1%N/A3.4 $101.23 4/30/20221,430,000 shares $146.52 million +7.5%N/A3.3 $102.46 4/15/20221,330,000 shares $143.75 million -5.7%N/A3 $108.08 3/31/20221,410,000 shares $167.52 million +2.9%2.3%3.1 $118.81 3/15/20221,370,000 shares $160.73 million -33.2%2.3%3.2 $117.32 2/28/20222,050,000 shares $239.28 million +20.6%3.4%4.9 $116.72 2/15/20221,700,000 shares $206.18 million +10.4%2.8%4.3 $121.28 1/31/20221,540,000 shares $174.16 million +16.7%2.7%3.9 $113.09 1/15/20221,320,000 shares $157.62 million -2.2%2.3%3.5 $119.41 12/31/20211,350,000 shares $183.78 million +8.9%2.4%3.6 $136.13 12/15/20211,240,000 shares $164.26 million +13.8%2.2%3.1 $132.47 11/30/20211,090,000 shares $134.84 million -9.2%1.9%2.5 $123.71 11/15/20211,200,000 shares $156.02 million +14.3%2.1%2.8 $130.02 10/29/20211,050,000 shares $118.44 million -23.4%1.5%2.5 $112.80 10/15/20211,370,000 shares $154.73 million -4.2%2.4%3.4 $112.94 9/30/20211,430,000 shares $154.68 million +21.2%2.5%3.6 $108.17 9/15/20211,180,000 shares $124.82 million -4.8%2.1%2.3 $105.78 8/31/20211,240,000 shares $141.58 million +10.7%2.3%2.5 $114.18 8/13/20211,120,000 shares $129.88 million +18.2%2.1%2.2 $115.96 7/30/2021947,300 shares $115.66 million +16.2%1.8%1.7 $122.09 7/15/2021815,500 shares $92.65 million +15.1%1.4%1.5 $113.61 6/30/2021708,600 shares $82.60 million -56.0%1.2%1.3 $116.57 6/15/20211,610,000 shares $172.19 million -0.6%2.8%3.5 $106.95 5/28/20211,620,000 shares $183.74 million +11.7%2.8%3.5 $113.42 5/14/20211,450,000 shares $159.37 million +21.9%2.5%3.1 $109.91 4/30/20211,190,000 shares $134.32 million -0.8%2.2%2.5 $112.87 4/15/20211,200,000 shares $133.84 million +31.2%2.2%2.4 $111.53 3/31/2021914,400 shares $91.61 million +8.7%1.7%1.8 $100.19 3/15/2021841,200 shares $88.30 million -32.7%1.6%1.7 $104.97 2/26/20211,250,000 shares $135.59 million +16.8%2.4%2.6 $108.47 2/12/20211,070,000 shares $104.58 million -0.9%1.9%2.3 $97.74 1/29/20211,080,000 shares $92.29 million -15.0%2.1%2.3 $85.45 1/15/20211,270,000 shares $115.35 million -5.9%2.4%2.8 $90.83 12/31/20201,350,000 shares $112.41 million -7.5%2.6%3 $83.27 12/15/20201,460,000 shares $106.80 million -3.3%2.8%3.3 $73.15 11/30/20201,510,000 shares $106.58 million -2.0%3.0%3.4 $70.58 10/30/20201,390,000 shares $91.03 million -9.7%2.8%3.2 $65.49 10/15/20201,540,000 shares $109.17 million -11.0%3.1%3.5 $70.89 WMS Short Interest - Frequently Asked Questions What is Advanced Drainage Systems' current short interest? Short interest is the volume of Advanced Drainage Systems shares that have been sold short but have not yet been covered or closed out. As of September 15th, traders have sold 3,800,000 shares of WMS short. 5.33% of Advanced Drainage Systems' shares are currently sold short. Learn More on Advanced Drainage Systems' current short interest. What is a good short interest ratio for Advanced Drainage Systems? 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. WMS shares currently have a short interest ratio of 5.0. Learn More on Advanced Drainage Systems's short interest ratio. Which institutional investors are shorting Advanced Drainage Systems? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Advanced Drainage Systems: Hudson Bay Capital Management LP, Hudson Bay Capital Management LP, Walleye Capital LLC, and Walleye Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Advanced Drainage Systems? 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. 5.33% of Advanced Drainage Systems' floating shares are currently sold short. Is Advanced Drainage Systems' short interest increasing or decreasing? Advanced Drainage Systems saw a drop in short interest in September. As of September 15th, there was short interest totaling 3,800,000 shares, a drop of 5.2% from the previous total of 4,010,000 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. What is Advanced Drainage Systems' float size? Advanced Drainage Systems currently has issued a total of 77,750,000 shares. Some of Advanced Drainage Systems' 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. Advanced Drainage Systems currently has a public float of 71,300,000 shares. How does Advanced Drainage Systems' short interest compare to its competitors? 5.33% of Advanced Drainage Systems' shares are currently sold short. Here is how the short interest of companies compare to Advanced Drainage Systems: TopBuild Corp. (4.83%), Eagle Materials Inc (4.39%), Fortune Brands Innovations, Inc. (4.25%), Installed Building Products, Inc. (9.95%), Las Vegas Sands Corp. (4.21%), Wynn Resorts, Limited (5.82%), MGM Resorts International (12.39%), Boyd Gaming Corporation (5.30%), Churchill Downs, Incorporated (3.15%), Caesars Entertainment, Inc. (14.85%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($8.81 billion), Canadian Natural Resources Limited ($5.82 billion), Reddit Inc. ($5.19 billion), Coinbase Global, Inc. ($4.52 billion), Robinhood Markets, Inc. ($4.30 billion), Charter Communications, Inc. ($3.75 billion), CoreWeave Inc. ($3.66 billion), Seagate Technology Holdings PLC ($3.57 billion), Live Nation Entertainment, Inc. ($3.33 billion), and Rocket Lab Corporation ($3.26 billion). View all of the most shorted stocks. What does it mean to sell short Advanced Drainage Systems stock? Short selling WMS is an investing strategy that aims to generate trading profit from Advanced Drainage Systems as its price is falling. WMS shares are trading up $2.55 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 Advanced Drainage Systems? A short squeeze for Advanced Drainage Systems 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 WMS, which in turn drives the price of the stock up even further. How often is Advanced Drainage Systems' 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 WMS, twice per month. The most recent reporting period available is September, 15 2025. 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