Harmony Biosciences (HRMY) Short Interest Ratio & Short Volume $33.90 -0.24 (-0.69%) As of 10:54 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 InterestTrendsBuy This Stock Harmony Biosciences Short Interest DataHarmony Biosciences (HRMY) has a short interest of 3.25 million shares, representing 7.46% of the float (the number of shares available for trading by the public). This marks a 0.00% change in short interest from the previous month. The short interest ratio (days to cover) is 4.4, indicating that it would take 4.4 days of the average trading volume of 597,645 shares to cover all short positions.Current Short Interest3,250,000 sharesPrevious Short Interest3,250,000 sharesChange Vs. Previous MonthNo ChangeDollar Volume Sold Short$95.78 millionShort Interest Ratio4.4 Days to CoverLast Record DateApril 30, 2025Outstanding Shares57,424,000 sharesFloat Size43,570,000 sharesShort Percent of Float7.46%Today's Trading Volume28,182 sharesAverage Trading Volume597,645 sharesToday's Volume Vs. Average5% Short Selling Harmony Biosciences? Sign up to receive the latest short interest report for Harmony Biosciences and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartHRMY Short Interest Over TimeHRMY Days to Cover Over TimeHRMY Percentage of Float Shorted Over Time Harmony Biosciences Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/20253,250,000 shares $95.78 million No Change7.5%4.4 $29.47 4/15/20253,250,000 shares $93.44 million -6.9%7.5%4.7 $28.75 3/31/20253,490,000 shares $115.83 million -15.1%8.0%5.1 $33.19 3/15/20254,110,000 shares $134.48 million +5.4%9.5%6.1 $32.72 2/28/20253,900,000 shares $132.02 million +4.0%9.0%6.3 $33.85 2/15/20253,750,000 shares $146.18 million -0.5%8.7%6.5 $38.98 1/31/20253,770,000 shares $146.16 million -31.8%9.3%7 $38.77 1/15/20255,530,000 shares $204.22 million -3.2%13.7%7.3 $36.93 12/31/20245,710,000 shares $196.48 million +5.0%14.1%7.7 $34.41 12/15/20245,440,000 shares $176.20 million -0.2%13.4%7 $32.39 Get the Latest News and Ratings for HRMY and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Harmony Biosciences and its competitors with MarketBeat's FREE daily newsletter. 11/30/20245,450,000 shares $188.95 million -6.0%13.5%7.3 $34.67 11/15/20245,800,000 shares $192.65 million -4.3%14.3%8 $33.22 10/31/20246,060,000 shares $194.71 million -18.7%15.2%8.9 $32.13 10/15/20247,450,000 shares $264.48 million -12.8%24.3%16.9 $35.50 9/30/20248,540,000 shares $341.60 million +1.6%27.8%19.8 $40.00 9/15/20248,410,000 shares $327.23 million -4.0%27.4%21.4 $38.91 8/31/20248,760,000 shares $315.18 million +0.3%28.6%23.5 $35.98 8/15/20248,730,000 shares $307.73 million +3.9%28.5%24 $35.25 7/31/20248,400,000 shares $284.42 million +4.2%27.4%22.4 $33.86 7/15/20248,060,000 shares $274.12 million -3.1%26.3%20 $34.01 6/30/20248,320,000 shares $251.01 million +2.3%27.2%20.4 $30.17 6/15/20248,130,000 shares $236.18 million +17.2%26.5%21.2 $29.05 5/31/20246,940,000 shares $204.04 million -2.1%22.7%17.4 $29.40 5/15/20247,090,000 shares $210.57 million +5.5%23.1%17.1 $29.70 4/30/20246,720,000 shares $207.72 million +4.0%16.1%15.9 $30.91 4/15/20246,460,000 shares $190.70 million +1.7%21.0%17.6 $29.52 3/31/20246,350,000 shares $213.23 million +4.3%20.7%17.5 $33.58 3/15/20246,090,000 shares $194.76 million -3.2%19.8%16.9 $31.98 2/29/20246,290,000 shares $201.91 million -1.9%19.9%15.4 $32.10 2/15/20246,410,000 shares $224.73 million +0.9%20.3%15.1 $35.06 1/31/20246,350,000 shares $200.28 million +1.6%19.5%13.8 $31.54 1/15/20246,250,000 shares $195.75 million +3.5%19.2%10.7 $31.32 12/31/20236,040,000 shares $195.09 million +2.4%18.6%8 $32.30 12/15/20235,900,000 shares $198.65 million -0.8%18.1%7.8 $33.67 11/30/20235,950,000 shares $172.91 million +0.3%17.9%7.6 $29.06 11/15/20235,930,000 shares $149.44 million +11.1%17.9%7.4 $25.20 10/31/20235,340,000 shares $125.70 million -22.6%16.1%6.8 $23.54 10/15/20236,900,000 shares $145.66 million -1.6%20.3%9.4 $21.11 9/30/20237,010,000 shares $229.72 million -4.6%20.6%12.4 $32.77 9/15/20237,350,000 shares $275.77 million -5.0%21.6%13.8 $37.5210 Cheap Stocks Ready to Explode (Ad)Imagine knowing, ahead of time, what the best investments of the year would be… Well, investors no longer need to imagine, guess, or throw darts. See, we’ve uncovered what looks to be a list of THE 10 best opportunities for 2024.Click here for your FREE report: 10 Great Stocks Under $10 8/31/20237,740,000 shares $280.58 million +3.8%22.8%15.7 $36.25 8/15/20237,460,000 shares $245.36 million -2.1%22.0%16.6 $32.89 7/31/20237,620,000 shares $269.52 million -8.5%22.6%16.7 $35.37 7/15/20238,330,000 shares $294.47 million -1.2%24.7%16.7 $35.35 6/30/20238,430,000 shares $296.65 million +2.9%25.0%15.7 $35.19 6/15/20238,190,000 shares $297.05 million +2.1%24.3%9.6 $36.27 5/31/20238,020,000 shares $277.33 million +0.6%23.9%9.2 $34.58 5/15/20237,970,000 shares $291.22 million -2.3%23.8%8.5 $36.54 4/30/20238,160,000 shares $263.08 million +2.1%24.4%8.6 $32.24 4/15/20237,990,000 shares $251.76 million +7.0%24.1%8.9 $31.51 3/31/20237,470,000 shares $243.90 million +19.0%22.6%8 $32.65 3/15/20236,280,000 shares $255.22 million +8.3%19.0%10.6 $40.64 2/28/20235,800,000 shares $255.37 million +8.0%17.5%10.5 $44.03 2/15/20235,370,000 shares $262.16 million +5.5%16.3%10.2 $48.82 1/31/20235,090,000 shares $245.19 million -3.8%15.5%10.7 $48.17 1/15/20235,290,000 shares $250.85 million +21.1%16.2%10.5 $47.42 12/30/20224,370,000 shares $240.79 million +9.3%13.3%8.9 $55.10 12/15/20224,000,000 shares $224.52 million -26.1%12.5%8.8 $56.13 11/30/20225,410,000 shares $323.36 million -4.6%17.0%10.9 $59.77 11/15/20225,670,000 shares $318.09 million -1.7%17.8%11.5 $56.10 10/31/20225,770,000 shares $300.04 million +0.2%18.5%11.3 $52.00 10/15/20225,760,000 shares $294.16 million -5.0%18.5%10.8 $51.07 9/30/20226,060,000 shares $268.40 million +5.6%19.5%11.2 $44.29 9/15/20225,740,000 shares $257.96 million +9.5%18.5%10.1 $44.94 8/31/20225,240,000 shares $230.09 million +2.8%16.9%9.6 $43.91 8/15/20225,100,000 shares $259.59 million +3.0%16.4%9.4 $50.90 7/31/20224,950,000 shares $251.11 million +5.8%16.6%9.2 $50.73 7/15/20224,680,000 shares $251.08 million +6.6%15.7%8.9 $53.65 6/30/20224,390,000 shares $214.10 million +6.3%14.8%8.2 $48.77 6/15/20224,130,000 shares $184.24 million +2.0%14.1%7.9 $44.61 5/31/20224,050,000 shares $176.58 million +1.0%13.8%7.7 $43.60 5/15/20224,010,000 shares $152.30 million +2.6%13.7%7.4 $37.98 4/30/20223,910,000 shares $176.11 million +3.7%14.1%7.6 $45.04 4/15/20223,770,000 shares $194.31 million +3.6%13.7%8.4 $51.54 3/31/20223,640,000 shares $177.09 million +1.4%N/A9.3 $48.65 3/15/20223,590,000 shares $157.31 million +7.2%13.7%9.4 $43.82 2/28/20223,350,000 shares $133.87 million +2.1%12.7%9.3 $39.96 2/15/20223,280,000 shares $130.38 million +10.8%12.6%10.4 $39.75 1/31/20222,960,000 shares $106.15 million -10.0%14.1%9 $35.86 1/15/20223,290,000 shares $120.68 million +10.8%N/A0 $36.68 12/31/20212,970,000 shares $126.64 million -2.9%12.0%6.1 $42.64 12/15/20213,060,000 shares $120.50 million -5.0%12.4%6.4 $39.38 11/30/20213,220,000 shares $109.77 million +22.0%12.9%6.2 $34.09 11/15/20212,640,000 shares $108.27 million +3.5%10.6%5 $41.01 10/29/20212,550,000 shares $105.75 million +94.7%11.6%4.8 $41.47 10/15/20211,310,000 shares $51.61 million -7.1%6.0%2.6 $39.40 9/30/20211,410,000 shares $54.05 million +52.1%6.4%4 $38.33 9/15/2021927,100 shares $33.70 million -4.9%4.1%2.6 $36.35 8/31/2021974,500 shares $33.03 million -10.6%4.3%3.4 $33.89 8/13/20211,090,000 shares $35.04 million +2.8%4.8%3.9 $32.1510 Cheap Stocks Ready to Explode (Ad)Imagine knowing, ahead of time, what the best investments of the year would be… Well, investors no longer need to imagine, guess, or throw darts. See, we’ve uncovered what looks to be a list of THE 10 best opportunities for 2024.Click here for your FREE report: 10 Great Stocks Under $10 7/30/20211,060,000 shares $27.73 million +16.6%4.9%3.7 $26.16 7/15/2021908,800 shares $26.36 million -1.2%4.2%3.4 $29.01 6/30/2021919,700 shares $25.96 million +53.9%4.2%3.7 $28.23 6/15/2021597,700 shares $18.97 million -6.3%2.8%2.9 $31.73 5/28/2021638,000 shares $20.39 million +7.7%2.9%3 $31.96 5/14/2021592,500 shares $15.46 million +20.3%2.9%3.2 $26.10 4/30/2021492,500 shares $14.29 million +61.9%1.7%3.5 $29.01 4/15/2021304,300 shares $8.85 million -54.1%1.1%2.4 $29.08 3/31/2021663,200 shares $21.24 million +7.5%3.2%5.3 $32.03 3/15/2021617,200 shares $18.84 million +5.6%3.0%4.9 $30.52 2/26/2021584,500 shares $21.15 million +23.4%2.9%4.9 $36.18 2/12/2021473,800 shares $18.16 million -3.4%2.3%3.6 $38.33 1/29/2021490,400 shares $17.51 million -27.2%2.4%3.3 $35.71 1/15/2021673,900 shares $26.02 million No Change3.3%4.2 $38.61 HRMY Short Interest - Frequently Asked Questions What is Harmony Biosciences' current short interest? Short interest is the volume of Harmony Biosciences shares that have been sold short but have not yet been covered or closed out. As of April 30th, traders have sold 3,250,000 shares of HRMY short. 7.46% of Harmony Biosciences' shares are currently sold short. Learn More on Harmony Biosciences' current short interest. What is a good short interest ratio for Harmony Biosciences? 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. HRMY shares currently have a short interest ratio of 4.0. Learn More on Harmony Biosciences's short interest ratio. Which institutional investors are shorting Harmony Biosciences? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Harmony Biosciences: 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 Harmony Biosciences? 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. 7.46% of Harmony Biosciences' floating shares are currently sold short. What is Harmony Biosciences' float size? Harmony Biosciences currently has issued a total of 57,424,000 shares. Some of Harmony Biosciences' 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. Harmony Biosciences currently has a public float of 43,570,000 shares. How does Harmony Biosciences' short interest compare to its competitors? 7.46% of Harmony Biosciences' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Harmony Biosciences: Roivant Sciences Ltd. (12.03%), Revolution Medicines, Inc. (8.89%), Elanco Animal Health Incorporated (5.00%), Blueprint Medicines Co. (8.76%), BridgeBio Pharma, Inc. (11.68%), Verona Pharma plc (9.87%), TG Therapeutics, Inc. (14.56%), Grifols, S.A. (1.26%), Lantheus Holdings, Inc. (10.28%), Legend Biotech Co. (3.67%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Harmony Biosciences stock? Short selling HRMY is an investing strategy that aims to generate trading profit from Harmony Biosciences as its price is falling. HRMY shares are trading down $0.37 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 Harmony Biosciences? A short squeeze for Harmony Biosciences 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 HRMY, which in turn drives the price of the stock up even further. How often is Harmony Biosciences' 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 HRMY, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies Roivant Sciences Short Interest Revolution Medicines Short Interest Elanco Animal Health Short Interest Blueprint Medicines Short Interest BridgeBio Pharma Short Interest Verona Pharma Short Interest TG Therapeutics Short Interest Grifols Short Interest Lantheus Short Interest Legend Biotech 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:HRMY) was last updated on 5/23/2025 by MarketBeat.com Staff From Our PartnersMarket 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 | SponsoredWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... 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