Jazz Pharmaceuticals (JAZZ) Short Interest Ratio & Short Volume $126.13 +1.70 (+1.37%) Closing price 08/28/2025 04:00 PM EasternExtended Trading$125.20 -0.93 (-0.74%) As of 05:39 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 ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Jazz Pharmaceuticals Short Interest DataJazz Pharmaceuticals (JAZZ) has a short interest of 5.48 million shares, representing 9.46% of the float (the number of shares available for trading by the public). This marks a -4.36% decrease 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 900,327 shares to cover all short positions.Current Short Interest5,480,000 sharesPrevious Short Interest5,730,000 sharesChange Vs. Previous Month-4.36%Dollar Volume Sold Short$628.17 millionShort Interest Ratio6.6 Days to CoverLast Record DateJuly 31, 2025Outstanding Shares60,660,000 sharesFloat Size57,920,000 sharesShort Percent of Float9.46%Today's Trading Volume518,113 sharesAverage Trading Volume900,327 sharesToday's Volume Vs. Average58% Short Selling Jazz Pharmaceuticals? Sign up to receive the latest short interest report for Jazz Pharmaceuticals 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 ChartJAZZ Short Interest Over TimeJAZZ Days to Cover Over TimeJAZZ Percentage of Float Shorted Over Time Jazz Pharmaceuticals Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/31/20255,480,000 shares $628.17 million -4.4%9.5%6.6 $114.63 7/15/20255,730,000 shares $643.48 million -2.4%9.9%6.2 $112.30 6/30/20255,870,000 shares $622.92 million +0.7%10.2%5.6 $106.12 6/15/20255,830,000 shares $632.56 million +2.1%10.1%5 $108.50 5/31/20255,710,000 shares $618.28 million -4.0%9.7%4.5 $108.28 5/15/20255,950,000 shares $631.12 million +11.2%10.1%4.4 $106.07 4/30/20255,350,000 shares $625.74 million +18.1%9.1%4.1 $116.96 4/15/20254,530,000 shares $466.18 million +5.8%7.8%4 $102.91 3/31/20254,280,000 shares $531.36 million -5.3%7.4%4.2 $124.15 3/15/20254,520,000 shares $623.58 million +3.7%7.8%5.4 $137.96 Get the Latest News and Ratings for JAZZ and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Jazz Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 2/28/20254,360,000 shares $625.79 million -3.8%7.5%6 $143.53 2/15/20254,530,000 shares $606.84 million +7.4%7.9%7 $133.96 1/31/20254,220,000 shares $524.84 million -0.9%7.3%6.8 $124.37 1/15/20254,260,000 shares $525.00 million +10.7%7.4%7.2 $123.24 12/31/20243,850,000 shares $474.13 million -8.3%6.7%6.4 $123.15 12/15/20244,200,000 shares $516.77 million -1.2%7.3%6.9 $123.04 11/30/20244,250,000 shares $516.76 million +11.3%7.3%7 $121.59 11/15/20243,820,000 shares $464.70 million +6.4%6.6%5.4 $121.65 10/31/20243,590,000 shares $395.01 million +2.9%6.2%5.5 $110.03 10/15/20243,490,000 shares $409.31 million +3.3%5.9%5.1 $117.28 9/30/20243,380,000 shares $376.57 million +3.1%5.7%5.1 $111.41 9/15/20243,280,000 shares $356.83 million +73.5%5.5%4.8 $108.79 8/31/20241,890,000 shares $219.20 million -7.4%3.2%2.7 $115.98 8/15/20242,040,000 shares $224.40 million -10.9%3.4%2.8 $110.00 7/31/20242,290,000 shares $252.47 million -17.6%3.8%3 $110.25 7/15/20242,780,000 shares $287.26 million +3.7%N/A3.7 $103.33 6/30/20242,680,000 shares $286.04 million +4.7%N/A3.5 $106.73 6/15/20242,560,000 shares $289.05 million -24.9%N/A3.4 $112.91 5/31/20243,410,000 shares $358.90 million +4.0%N/A4.6 $105.25 5/15/20243,280,000 shares $359.95 million -8.9%N/A4.8 $109.74 4/30/20243,600,000 shares $398.70 million -2.7%N/A5.6 $110.75 4/15/20243,700,000 shares $410.37 million +13.5%6.1%6 $110.91 3/31/20243,260,000 shares $392.57 million +17.7%5.4%5.3 $120.42 3/15/20242,770,000 shares $334.89 million +15.9%4.6%4.3 $120.90 2/29/20242,390,000 shares $284.17 million +3.0%4.0%4 $118.90 2/15/20242,320,000 shares $294.22 million +5.0%N/A4 $126.82 1/31/20242,210,000 shares $271.21 million +2.3%N/A3.4 $122.72 1/15/20242,160,000 shares $256.91 million -1.8%N/A3 $118.94 12/31/20232,200,000 shares $270.60 million -0.5%N/A3.1 $123.00 12/15/20232,210,000 shares $268.52 million -9.1%N/A3.1 $121.50INVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting Off (Ad)Right now, we’re witnessing a monumental shift in the world.Our No. 1 AI Pick is currently trading for pennies on the dollar compared to Nividia. 11/30/20232,430,000 shares $287.30 million -5.5%N/A3.6 $118.23 11/15/20232,570,000 shares $322.28 million -6.2%N/A4 $125.40 10/31/20232,740,000 shares $348.03 million +5.0%N/A4.5 $127.02 10/15/20232,610,000 shares $337.00 million -19.9%N/A4.7 $129.12 9/30/20233,260,000 shares $421.97 million -2.4%N/A6.9 $129.44 9/15/20233,340,000 shares $442.52 million +16.8%N/A6.8 $132.49 8/31/20232,860,000 shares $410.01 million +1.1%N/A5.4 $143.36 8/15/20232,830,000 shares $396.17 million -0.4%N/A5 $139.99 7/31/20232,840,000 shares $370.39 million -5.7%N/A5 $130.42 7/15/20233,010,000 shares $381.34 million +0.3%N/A5.3 $126.69 6/30/20233,000,000 shares $371.91 million +11.5%N/A5.4 $123.97 6/15/20232,690,000 shares $346.82 million -13.8%N/A5.1 $128.93 5/31/20233,120,000 shares $399.86 million +5.1%N/A6.3 $128.16 5/15/20232,970,000 shares $400.00 million +19.8%N/A6 $134.68 4/30/20232,480,000 shares $348.37 million +7.4%N/A5 $140.47 4/15/20232,310,000 shares $336.15 million -10.1%N/A4.8 $145.52 3/31/20232,570,000 shares $376.07 million +10.8%N/A5 $146.33 3/15/20232,320,000 shares $312.94 million -4.9%N/A4.4 $134.89 2/28/20232,440,000 shares $342.58 million -1.6%N/A4.2 $140.40 2/15/20232,480,000 shares $370.54 million -3.9%N/A4.6 $149.41 1/31/20232,580,000 shares $404.18 million -1.9%N/A4.6 $156.66 1/15/20232,630,000 shares $411.52 million -2.6%N/A4.8 $156.47 12/30/20222,700,000 shares $430.14 million +21.1%N/A5 $159.31 12/15/20222,230,000 shares $341.10 million +2.8%N/A4 $152.96 11/30/20222,170,000 shares $340.49 million -7.7%N/A4 $156.91 11/15/20222,350,000 shares $348.83 million -1.7%N/A4.5 $148.44 10/31/20222,390,000 shares $343.66 million +6.2%N/A4.7 $143.79 10/15/20222,250,000 shares $299.72 million -14.1%N/A4.3 $133.21 9/30/20222,620,000 shares $349.22 million -4.4%N/A5 $133.29 9/15/20222,740,000 shares $416.97 million -1.4%N/A5.3 $152.18 8/31/20222,780,000 shares $431.51 million No ChangeN/A5.7 $155.22 8/15/20222,780,000 shares $445.52 million +3.0%N/A5.4 $160.26 7/31/20222,700,000 shares $421.36 million -9.7%4.5%5.2 $156.06 7/15/20222,990,000 shares $470.75 million +2.8%4.9%5.8 $157.44 6/30/20222,910,000 shares $453.99 million -4.9%4.8%5.4 $156.01 6/15/20223,060,000 shares $446.09 million -13.8%5.1%5.5 $145.78 5/31/20223,550,000 shares $531.36 million +10.6%5.9%6.7 $149.68 5/15/20223,210,000 shares $470.23 million -2.7%5.3%5.5 $146.49 4/30/20223,300,000 shares $528.73 million -12.2%5.6%5.6 $160.22 4/15/20223,760,000 shares $628.86 million +4.7%6.3%6.6 $167.25 3/31/20223,590,000 shares $558.86 million -5.0%6.0%5.7 $155.67 3/15/20223,780,000 shares $584.88 million -6.9%6.3%6.2 $154.73 2/28/20224,060,000 shares $557.93 million -6.0%6.8%6.4 $137.42 2/15/20224,320,000 shares $624.11 million +0.9%7.2%7 $144.47 1/31/20224,280,000 shares $594.53 million +3.9%7.2%6.9 $138.91 1/15/20224,120,000 shares $594.52 million -7.2%6.9%6.7 $144.30 12/31/20214,440,000 shares $565.66 million +0.7%7.4%7.4 $127.40 12/15/20214,410,000 shares $536.83 million +9.7%7.4%7.4 $121.73 11/30/20214,020,000 shares $481.88 million -2.7%6.7%6.4 $119.87 11/15/20214,130,000 shares $574.81 million +7.8%6.9%6.6 $139.18INVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting Off (Ad)Right now, we’re witnessing a monumental shift in the world.Our No. 1 AI Pick is currently trading for pennies on the dollar compared to Nividia. 10/29/20213,830,000 shares $509.54 million No Change6.4%5.8 $133.04 10/15/20213,830,000 shares $538.88 million +7.6%6.4%5.4 $140.70 9/30/20213,560,000 shares $463.55 million -1.1%6.0%5 $130.21 9/15/20213,600,000 shares $479.52 million -3.0%6.1%5.4 $133.20 8/31/20213,710,000 shares $488.64 million -12.9%6.2%5.4 $131.71 8/13/20214,260,000 shares $605.60 million +1.2%7.2%6.4 $142.16 7/30/20214,210,000 shares $713.68 million +2.2%7.1%6.5 $169.52 7/15/20214,120,000 shares $735.21 million +3.0%7.0%6.2 $178.45 6/30/20214,000,000 shares $710.56 million -11.3%6.8%6 $177.64 6/15/20214,510,000 shares $827.18 million +15.6%7.7%6.7 $183.41 5/28/20213,900,000 shares $694.71 million +8.0%6.7%6.2 $178.13 5/14/20213,610,000 shares $643.16 million -31.4%N/A5.4 $178.16 4/30/20215,260,000 shares $871.85 million +11.2%N/A7.4 $165.75 4/15/20214,730,000 shares $786.93 million +0.6%8.7%6.5 $166.37 3/31/20214,700,000 shares $782.50 million +3.8%8.7%6.5 $166.49 3/15/20214,530,000 shares $758.87 million +4.4%8.4%6.2 $167.52 2/26/20214,340,000 shares $741.01 million +5.3%8.0%6 $170.74 2/12/20214,120,000 shares $687.42 million +30.0%7.6%6 $166.85 1/29/20213,170,000 shares $517.50 million -2.2%5.8%5 $163.25 1/15/20213,240,000 shares $537.22 million -6.4%6.0%6.2 $165.81 12/31/20203,460,000 shares $569.38 million -0.6%6.4%6.7 $164.56 12/15/20203,480,000 shares $519.32 million -4.7%6.5%6.6 $149.23 11/30/20203,650,000 shares $522.97 million +1.1%6.8%5.1 $143.28 11/15/20203,610,000 shares $531.07 million -11.1%6.7%4.8 $147.11 10/30/20204,060,000 shares $591.26 million -2.6%7.6%5.5 $145.63 10/15/20204,170,000 shares $634.67 million -12.4%7.8%5.5 $152.20 9/30/20204,760,000 shares $678.73 million +30.4%8.9%6.1 $142.59 9/15/20203,650,000 shares $516.48 million +13.0%6.8%4.7 $141.50 8/31/20203,230,000 shares $434.08 million +4.5%6.1%4.7 $134.39 JAZZ Short Interest - Frequently Asked Questions What is Jazz Pharmaceuticals' current short interest? Short interest is the volume of Jazz Pharmaceuticals shares that have been sold short but have not yet been closed out or covered. As of July 31st, traders have sold 5,480,000 shares of JAZZ short. 9.46% of Jazz Pharmaceuticals' shares are currently sold short. Learn More on Jazz Pharmaceuticals' current short interest. What is a good short interest ratio for Jazz Pharmaceuticals? 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. JAZZ shares currently have a short interest ratio of 7.0. Learn More on Jazz Pharmaceuticals's short interest ratio. Which institutional investors are shorting Jazz Pharmaceuticals? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Jazz Pharmaceuticals: Jane Street Group LLC, Simplex Trading LLC, and Wolverine Asset Management LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Jazz Pharmaceuticals? 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. 9.46% of Jazz Pharmaceuticals' floating shares are currently sold short. Is Jazz Pharmaceuticals' short interest increasing or decreasing? Jazz Pharmaceuticals saw a decline in short interest in July. As of July 31st, there was short interest totaling 5,480,000 shares, a decline of 4.4% from the previous total of 5,730,000 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 Jazz Pharmaceuticals' float size? Jazz Pharmaceuticals currently has issued a total of 60,660,000 shares. Some of Jazz Pharmaceuticals' 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. Jazz Pharmaceuticals currently has a public float of 57,920,000 shares. How does Jazz Pharmaceuticals' short interest compare to its competitors? 9.46% of Jazz Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the sector of "medical" compare to Jazz Pharmaceuticals: Axsome Therapeutics, Inc. (9.47%), Royalty Pharma PLC (4.57%), Corcept Therapeutics Incorporated (11.85%), Perrigo Company plc (4.17%), Supernus Pharmaceuticals, Inc. (9.93%), Pacira BioSciences, Inc. (13.25%), Nektar Therapeutics (6.11%), Omeros Corporation (23.76%), Assembly Biosciences, Inc. (0.73%), Cumberland Pharmaceuticals Inc. (0.25%), 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 ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), Strategy Inc ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks. What does it mean to sell short Jazz Pharmaceuticals stock? Short selling JAZZ is an investing strategy that aims to generate trading profit from Jazz Pharmaceuticals as its price is falling. JAZZ shares are trading up $1.70 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 Jazz Pharmaceuticals? A short squeeze for Jazz Pharmaceuticals 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 JAZZ, which in turn drives the price of the stock up even further. How often is Jazz Pharmaceuticals' 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 JAZZ, twice per month. The most recent reporting period available is July, 31 2025. More Short Interest Resources from MarketBeat Related Companies AXSM Short Interest Data RPRX Short Interest Data CORT Short Interest Data PRGO Short Interest Data SUPN Short Interest Data PCRX Short Interest Data NKTR Short Interest Data OMER Short Interest Data ASMB Short Interest Data CPIX Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:JAZZ) was last updated on 8/29/2025 by MarketBeat.com Staff From Our PartnersMusk’s Project Colossus could mint millionairesI predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new milliona...Brownstone Research | SponsoredINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredBONUS GUIDE - Ben Stein Prepares For the Next Financial CrisisWith inflation high, debt soaring, and global tensions rising, a financial storm may be brewing. 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