Watsco (WSO) Short Interest Ratio & Short Volume $378.90 +8.10 (+2.18%) Closing price 03:59 PM EasternExtended Trading$378.73 -0.17 (-0.04%) As of 07:57 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Watsco Short Interest DataWatsco (WSO) has a short interest of 2.80 million shares. This marks a 7.69% increase in short interest from the previous month. The short interest ratio (days to cover) is 6.6, indicating that it would take 6.6 days of the average trading volume of 576,947 shares to cover all short positions.Current Short Interest2,800,000 sharesPrevious Short Interest2,600,000 sharesChange Vs. Previous Month+7.69%Dollar Volume Sold Short$1.13 billionShort Interest Ratio6.6 Days to CoverLast Record DateSeptember 30, 2025Outstanding Shares40,550,000 sharesPercentage of Shares Shorted6.91%Today's Trading Volume344,878 sharesAverage Trading Volume576,947 sharesToday's Volume Vs. Average60% Short Selling Watsco? Sign up to receive the latest short interest report for Watsco and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartWSO Short Interest Over TimeWSO Days to Cover Over TimeWSO Percentage of Float Shorted Over Time Watsco Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/30/20252,800,000 shares $1.13 billion +7.7%N/A6.6 $404.56 9/15/20252,600,000 shares $1.00 billion +5.3%N/A6.6 $386.38 8/31/20252,470,000 shares $993.03 million -2.4%7.0%7.2 $402.04 8/15/20252,530,000 shares $1.05 billion +2.0%N/A7.7 $414.21 7/31/20252,480,000 shares $1.12 billion -0.8%7.0%7.6 $451.31 7/15/20252,500,000 shares $1.19 billion -57.5%N/A8 $474.76 6/30/20255,880,000 shares $2.60 billion +145.0%16.6%3.1 $441.88 6/15/20252,400,000 shares $1.04 billion +0.4%6.8%8 $431.27 5/31/20252,390,000 shares $1.06 billion +3.0%6.8%7.9 $443.35 5/15/20252,320,000 shares $1.11 billion -4.1%6.6%7.6 $478.93 Get the Latest News and Ratings for WSO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Watsco and its competitors with MarketBeat's FREE daily newsletter. 4/30/20252,420,000 shares $1.11 billion -8.3%N/A7.7 $459.61 4/15/20252,640,000 shares $1.35 billion +9.5%7.5%8.7 $510.65 3/31/20252,410,000 shares $1.23 billion -1.6%6.8%8.7 $509.53 3/15/20252,450,000 shares $1.25 billion +1.2%7.0%9.3 $508.47 2/28/20252,420,000 shares $1.22 billion +3.9%6.9%9.6 $503.80 2/15/20252,330,000 shares $1.13 billion +1.3%6.6%10 $485.21 1/31/20252,300,000 shares $1.10 billion -0.9%N/A11.1 $478.91 1/15/20252,320,000 shares $1.11 billion -1.7%N/A10.8 $479.63 12/31/20242,360,000 shares $1.12 billion -4.1%N/A10.9 $473.89 12/15/20242,460,000 shares $1.25 billion -0.4%N/A11.5 $509.72 11/30/20242,470,000 shares $1.36 billion -2.4%N/A11.5 $551.60 11/15/20242,530,000 shares $1.32 billion -4.2%N/A11.2 $520.74 10/31/20242,640,000 shares $1.25 billion -9.3%N/A12.2 $473.36 10/15/20242,910,000 shares $1.44 billion -5.8%N/A12 $493.65 9/30/20243,090,000 shares $1.52 billion -2.5%N/A12.8 $491.87 9/15/20243,170,000 shares $1.51 billion -4.2%N/A12.7 $476.71 8/31/20243,310,000 shares $1.57 billion +4.8%N/A12.9 $475.42 8/15/20243,160,000 shares $1.51 billion +3.3%N/A12.1 $477.47 7/31/20243,060,000 shares $1.50 billion -2.6%N/A11.2 $489.49 7/15/20243,140,000 shares $1.58 billion +2.3%N/A11 $501.69 6/30/20243,070,000 shares $1.42 billion -11.5%N/A10.7 $463.24 6/15/20243,470,000 shares $1.66 billion +1.2%N/A12.1 $477.99 5/31/20243,430,000 shares $1.63 billion -1.4%N/A10.8 $474.90 5/15/20243,480,000 shares $1.68 billion -7.0%N/A10.7 $482.70 4/30/20243,740,000 shares $1.67 billion -10.7%N/A10.7 $447.72 4/15/20244,190,000 shares $1.73 billion +8.6%N/A12 $412.45 3/31/20243,860,000 shares $1.67 billion -7.0%N/A11.1 $431.97 3/15/20244,150,000 shares $1.68 billion +7.2%N/A12.2 $404.41 2/29/20243,870,000 shares $1.53 billion +1.8%N/A12.3 $394.12 2/15/20243,800,000 shares $1.51 billion +1.1%N/A12.7 $397.18 1/31/20243,760,000 shares $1.47 billion -1.8%N/A13.7 $390.98 1/15/20243,830,000 shares $1.56 billion -1.0%N/A14.1 $407.66 12/31/20233,870,000 shares $1.66 billion -1.8%N/A13.4 $428.47 12/15/20233,940,000 shares $1.66 billion -5.5%N/A12.6 $421.15 11/30/20234,170,000 shares $1.59 billion +1.5%N/A12.9 $382.04 11/15/20234,110,000 shares $1.57 billion +0.7%N/A12.9 $381.88 10/31/20234,080,000 shares $1.42 billion -5.6%N/A12.8 $348.82 10/15/20234,320,000 shares $1.65 billion -3.1%N/A13 $382.67 9/30/20234,460,000 shares $1.68 billion +0.2%N/A14.6 $377.72 9/15/20234,450,000 shares $1.57 billion +0.9%N/A15.4 $352.66 8/31/20234,410,000 shares $1.61 billion +1.2%N/A14.8 $364.59 8/15/20234,360,000 shares $1.57 billion +0.5%N/A12.3 $360.56 7/31/20234,340,000 shares $1.64 billion -1.4%N/A12.1 $378.23 7/15/20234,400,000 shares $1.60 billion +2.3%N/A12.3 $364.65 6/30/20234,300,000 shares $1.64 billion -2.7%N/A11.3 $381.41 6/15/20234,420,000 shares $1.62 billion +9.4%N/A11.7 $367.19 5/31/20234,040,000 shares $1.31 billion +2.3%N/A11 $324.23 5/15/20233,950,000 shares $1.33 billion +7.6%N/A12.5 $335.77 4/30/20233,670,000 shares $1.27 billion -4.9%N/A11 $346.38 4/15/20233,860,000 shares $1.20 billion +5.8%N/A11.6 $311.97 3/31/20233,650,000 shares $1.16 billion +1.7%N/A12 $318.16 3/15/20233,590,000 shares $1.08 billion -4.0%N/A12.5 $300.45 2/28/20233,740,000 shares $1.14 billion -0.5%N/A13.5 $304.71 2/15/20233,760,000 shares $1.16 billion -0.3%N/A13.5 $307.62 1/31/20233,770,000 shares $1.08 billion -3.6%N/A14 $287.37 1/15/20233,910,000 shares $1.08 billion +5.1%N/A15 $275.46 12/30/20223,720,000 shares $927.77 million -1.1%N/A12.4 $249.40 12/15/20223,760,000 shares $970.79 million +8.4%N/A12.2 $258.19 11/30/20223,470,000 shares $933.36 million +7.1%N/A11.4 $268.98 11/15/20223,240,000 shares $917.67 million +13.7%N/A10.9 $283.23 10/31/20222,850,000 shares $772.24 million +11.3%8.7%9.8 $270.96 10/15/20222,560,000 shares $618.16 million +17.4%7.8%8.5 $241.47 9/30/20222,180,000 shares $561.26 million +2.8%6.6%8.2 $257.46 9/15/20222,120,000 shares $577.15 million -2.3%6.5%8.1 $272.24 8/31/20222,170,000 shares $590.31 million +4.3%6.6%7.9 $272.03 8/15/20222,080,000 shares $635.02 million +6.1%6.3%7.5 $305.30 7/31/20221,960,000 shares $536.94 million -11.7%6.0%6.8 $273.95 7/15/20222,220,000 shares $563.19 million +3.3%6.8%7.6 $253.69 6/30/20222,150,000 shares $513.46 million +25.0%6.5%7.5 $238.82 6/15/20221,720,000 shares $421.43 million -5.5%5.2%5.9 $245.02 5/31/20221,820,000 shares $465.25 million -2.2%5.5%6.9 $255.63 5/15/20221,860,000 shares $480.12 million +17.7%5.7%7 $258.13 4/30/20221,580,000 shares $421.51 million +17.9%4.8%6.4 $266.78 4/15/20221,340,000 shares $386.44 million +13.6%4.1%5.9 $288.39 3/31/20221,180,000 shares $359.48 million -11.3%3.6%6.2 $304.64 3/15/20221,330,000 shares $389.94 million +4.7%4.1%7.9 $293.19 2/28/20221,270,000 shares $346.79 million +2.4%3.9%7.9 $273.06 2/15/20221,240,000 shares $325.61 million -2.4%3.8%8.3 $262.59 1/31/20221,270,000 shares $358.85 million -3.1%3.9%9.9 $282.56 1/15/20221,310,000 shares $390.45 million No Change4.0%10.9 $298.05 12/31/20211,310,000 shares $409.87 million -3.7%4.0%10.7 $312.88 12/15/20211,360,000 shares $429.71 million +7.9%4.2%11.1 $315.96 11/30/20211,260,000 shares $368.81 million +2.4%3.9%10.6 $292.71 11/15/20211,230,000 shares $370.12 million -0.8%3.8%10.1 $300.91 10/29/20211,240,000 shares $359.08 million +3.3%3.8%10.1 $289.58 10/15/20211,200,000 shares $342.35 million -3.2%3.7%9.2 $285.29 9/30/20211,240,000 shares $328.13 million No Change3.8%8.9 $264.62 9/15/20211,240,000 shares $347.65 million -0.8%3.8%8.6 $280.36 8/31/20211,250,000 shares $348.03 million -3.1%3.8%8.5 $278.42 8/13/20211,290,000 shares $356.35 million -1.5%4.0%9 $276.24 7/30/20211,310,000 shares $370.00 million -12.1%4.0%8.5 $282.44 7/15/20211,490,000 shares $425.98 million +1.4%4.6%9.5 $285.89 6/30/20211,470,000 shares $421.36 million -5.8%4.5%9.2 $286.64 6/15/20211,560,000 shares $446.57 million +2.6%4.8%9.9 $286.26 5/28/20211,520,000 shares $442.93 million +4.8%4.7%9 $291.40 5/14/20211,450,000 shares $427.66 million -0.7%N/A7.9 $294.94 4/30/20211,460,000 shares $434.90 million -8.2%N/A7.5 $297.88 4/15/20211,590,000 shares $440.26 million -1.9%N/A7.7 $276.89 3/31/20211,620,000 shares $421.56 million -4.1%N/A8.2 $260.22 3/15/20211,690,000 shares $419.22 million -7.1%N/A8.6 $248.06 2/26/20211,820,000 shares $448.45 million +4.6%N/A9.6 $246.40 2/12/20211,740,000 shares $433.64 million -4.4%N/A9.9 $249.22 1/29/20211,820,000 shares $456.67 million -9.0%N/A10.6 $250.92 1/15/20212,000,000 shares $465.76 million No ChangeN/A12 $232.88 12/31/20202,000,000 shares $455.68 million -0.5%N/A12.5 $227.84 12/15/20202,010,000 shares $441.70 million -1.5%N/A12.4 $219.75 11/30/20202,040,000 shares $455.10 million -1.9%N/A11.9 $223.09 10/30/20202,120,000 shares $480.12 million -2.3%N/A11.4 $226.47 WSO Short Interest - Frequently Asked Questions What is Watsco's current short interest? Short interest is the volume of Watsco shares that have been sold short but have not yet been covered or closed out. As of September 30th, investors have sold 2,800,000 shares of WSO short. Learn More on Watsco's current short interest. What is a good short interest ratio for Watsco? 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. WSO shares currently have a short interest ratio of 7.0. Learn More on Watsco's short interest ratio. Which institutional investors are shorting Watsco? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Watsco: Scopus Asset Management L.P., Bank of America Corp DE, Walleye Capital LLC, Walleye Trading LLC, and Hestia Capital Management LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Watsco's short interest increasing or decreasing? Watsco saw a increase in short interest during the month of September. As of September 30th, there was short interest totaling 2,800,000 shares, an increase of 7.7% from the previous total of 2,600,000 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 Watsco's short interest compare to its competitors? Here is how the short interest of companies compare to Watsco: Carrier Global Corporation (1.75%), Comfort Systems USA, Inc. (1.91%), Graco Inc. (2.13%), ITT Inc. (1.65%), Illinois Tool Works Inc. (2.25%), Lennox International, Inc. (5.24%), Masco Corporation (3.21%), Martin Marietta Materials, Inc. (2.77%), Otis Worldwide Corporation (1.63%), Pentair plc (1.48%), 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 ($15.71 billion), Robinhood Markets, Inc. ($7.56 billion), Reddit Inc. ($4.55 billion), Coinbase Global, Inc. ($4.53 billion), CoreWeave Inc. ($4.43 billion), Charter Communications, Inc. ($4.07 billion), Seagate Technology Holdings PLC ($3.94 billion), IonQ, Inc. ($3.78 billion), TC Energy Corporation ($3.13 billion), and Live Nation Entertainment, Inc. ($3.12 billion). View all of the most shorted stocks. What does it mean to sell short Watsco stock? Short selling WSO is an investing strategy that aims to generate trading profit from Watsco as its price is falling. WSO shares are trading up $8.10 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 Watsco? A short squeeze for Watsco 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 WSO, which in turn drives the price of the stock up even further. How often is Watsco'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 WSO, twice per month. The most recent reporting period available is September, 30 2025. More Short Interest Resources from MarketBeat Related Companies CARR Short Interest FIX Short Interest GGG Short Interest ITT Short Interest ITW Short Interest LII Short Interest MAS Short Interest MLM Short Interest OTIS Short Interest PNR Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:WSO) was last updated on 10/20/2025 by MarketBeat.com Staff From Our PartnersNEW LAW: Congress Approves Setup For Digital Dollar?Trump Ally Says Congress Approved the Setup for a Digital Dollar 2.0 But according to Rep. 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