Harmony Biosciences (HRMY) Short Interest Ratio & Short Volume $33.33 -1.81 (-5.15%) As of 04:00 PM Eastern 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 3.38 million shares, representing 7.75% of the float (the number of shares available for trading by the public). This marks a 32.55% increase in short interest from the previous month. The short interest ratio (days to cover) is 4.8, indicating that it would take 4.8 days of the average trading volume of 619,696 shares to cover all short positions.Current Short Interest3,380,000 sharesPrevious Short Interest2,550,000 sharesChange Vs. Previous Month+32.55%Dollar Volume Sold Short$116.20 millionShort Interest Ratio4.8 Days to CoverLast Record DateMay 31, 2025Outstanding Shares57,424,000 sharesFloat Size43,610,000 sharesShort Percent of Float7.75%Today's Trading Volume1,095,526 sharesAverage Trading Volume619,696 sharesToday's Volume Vs. Average177% 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 5/31/20253,380,000 shares $116.20 million +32.6%7.8%4.8 $34.38 5/15/20252,550,000 shares $87.29 million -21.5%5.9%3.5 $34.23 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 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. 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 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 $21.11The End of Elon Musk…? 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According to his research, if you listen to the media and miss out on Elon's newest breakthrough, it's going to cost you the fortune of a lifetime.Click here to see why the "End of Elon" crowd is about to be wrong again. 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 $37.52 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 $36.35Is Elon's empire crumbling? 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Click here to see the Tesla shock that could blindside everyone. 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 $32.15 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 closed out or covered. As of May 31st, investors have sold 3,380,000 shares of HRMY short. 7.75% 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 5.0. 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. 7.75% of Harmony Biosciences' floating shares are currently sold short. Is Harmony Biosciences' short interest increasing or decreasing? Harmony Biosciences saw a increase in short interest in May. As of May 31st, there was short interest totaling 3,380,000 shares, an increase of 32.5% from the previous total of 2,550,000 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 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 43,610,000 shares. How does Harmony Biosciences' short interest compare to its competitors? 7.75% 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. (10.63%), Revolution Medicines, Inc. (11.86%), BridgeBio Pharma, Inc. (15.35%), Elanco Animal Health Incorporated (5.32%), Verona Pharma plc (9.37%), Legend Biotech Co. (7.03%), TG Therapeutics, Inc. (16.93%), Grifols, S.A. (1.19%), Lantheus Holdings, Inc. (11.91%), Nuvalent, Inc. (12.65%), 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 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 $2.15 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 increases 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 May, 31 2025. More Short Interest Resources from MarketBeat Related Companies Roivant Sciences Short Interest Revolution Medicines Short Interest BridgeBio Pharma Short Interest Elanco Animal Health Short Interest Verona Pharma Short Interest Legend Biotech Short Interest TG Therapeutics Short Interest Grifols Short Interest Lantheus Short Interest Nuvalent 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 6/12/2025 by MarketBeat.com Staff From Our PartnersTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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