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Jazz Pharmaceuticals (JAZZ) Short Interest Ratio & Short Volume

Jazz Pharmaceuticals logo
$244.96 -0.89 (-0.36%)
Closing price 04:00 PM Eastern
Extended Trading
$245.24 +0.28 (+0.12%)
As of 07:56 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 Massive. Learn more.
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Jazz Pharmaceuticals Short Interest Overview

As of July 31, 2026, Jazz Pharmaceuticals (JAZZ) had a short interest of 3.36 million shares sold short, representing 5.39% of the public float. This marks a -11.75% decrease in short interest since the prior report. The short interest ratio (days to cover) is 5.3, meaning it would take 5.3 days of the average trading volume of 815,200 shares to cover all short positions.

Current Short Interest
3,355,182 shares
Previous Short Interest
3,801,863 shares
Change Vs. Previous Month
-11.75%
Dollar Volume Sold Short
$848.39 million
Short Interest Ratio
5.3 Days to Cover
Last Record Date
July 31, 2026
Outstanding Shares
64,920,000 shares
Short Percent of Float
5.39%
Today's Trading Volume
542,030 shares
Average Trading Volume
815,200 shares
Today's Volume Vs. Average
66%
Short Selling Jazz Pharmaceuticals?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

JAZZ Short Interest Over Time

JAZZ Days to Cover Over Time

JAZZ Percentage of Float Shorted Over Time

Jazz Pharmaceuticals Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
7/31/20263,355,182 shares $848.39 million -11.8%5.4%5.33 $252.86
7/15/20263,801,863 shares $909.86 million +8.6%6.3%4.83 $239.32
6/30/20263,500,138 shares $843.43 million -11.2%5.8%3.75 $240.97
6/15/20263,941,396 shares $908.85 million -8.1%6.5%4.24 $230.59
5/29/20264,290,867 shares $1.01 billion -11.5%7.1%5.09 $236.49
5/15/20264,849,332 shares $1.11 billion -4.7%8.1%4.69 $228.77
4/30/20265,090,611 shares $1.03 billion -2.9%8.5%5.33 $203.02
4/15/20265,240,459 shares $1.04 billion -19.7%8.7%5.97 $199.33
3/31/20266,526,407 shares $1.23 billion +5.9%10.8%7.99 $189.05
3/13/20266,164,020 shares $1.10 billion +2.8%10.5%7.64 $178.55
2/27/20265,997,312 shares $1.14 billion -0.8%10.2%4.52 $190.02
2/13/20266,044,810 shares $1.01 billion +6.7%10.0%9.14 $166.31
1/30/20265,663,941 shares $931.66 million +5.8%9.7%6.33 $164.49
1/15/20265,352,497 shares $916.13 million -0.2%9.2%3.58 $171.16
12/31/20255,363,382 shares $911.77 million +6.4%9.2%6.8 $170.00
12/15/20255,042,462 shares $854.85 million +1.4%8.7%4.72 $169.53
11/28/20254,974,908 shares $878.59 million +2.8%8.6%2.24 $176.61
11/14/20254,839,654 shares $682.73 million -5.4%8.3%5.3 $141.07
10/31/20255,116,514 shares $704.24 million +9.1%8.8%8.36 $137.64
10/15/20254,690,000 shares $636.90 million -0.9%8.1%6.3 $135.80
9/30/20254,730,000 shares $623.41 million -10.8%8.2%6.3 $131.80
9/15/20255,300,000 shares $663.67 million -7.2%9.2%7.1 $125.22
8/31/20255,710,000 shares $729.45 million +1.6%9.9%7.8 $127.75
8/15/20255,620,000 shares $661.87 million +2.6%9.7%7.4 $117.77
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
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
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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 $121.50
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
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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 $139.18
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

JAZZ Short Interest - Frequently Asked Questions

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 3,355,182 shares of JAZZ short. 5.39% of Jazz Pharmaceuticals' shares are currently sold short. Learn More on Jazz Pharmaceuticals' current short interest.

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 5.3. Learn More on Jazz Pharmaceuticals's short interest ratio.

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. 5.39% of Jazz Pharmaceuticals' floating shares are currently sold short.

Jazz Pharmaceuticals saw a decrease in short interest in July. As of July 31st, there was short interest totaling 3,355,182 shares, a decrease of 11.7% from the previous total of 3,801,863 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.

5.39% of Jazz Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceuticals" compare to Jazz Pharmaceuticals: Axsome Therapeutics, Inc. (8.34%), Takeda Pharmaceutical Co. (0.09%), Teva Pharmaceutical Industries Ltd. (2.96%), BeOne Medicines Ltd. - Sponsored ADR (0.86%), Royalty Pharma PLC (2.28%), Zoetis Inc. (5.10%), Viatris Inc. (3.93%), Neurocrine Biosciences, Inc. (4.53%), Corcept Therapeutics Incorporated (11.46%), Elanco Animal Health Incorporated (7.29%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.50 billion), Invesco QQQ ($50.36 billion), iShares Russell 2000 ETF ($21.20 billion), Western Digital Corporation ($13.40 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($11.46 billion), iShares 20+ Year Treasury Bond ETF ($7.84 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($7.51 billion), iShares Semiconductor ETF ($6.37 billion), and Financial Select Sector SPDR Fund ($6.34 billion). View all of the most shorted stocks.

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 down $0.89 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.

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.

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 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like JAZZ:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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Short Interest Tools

Short interest data for NASDAQ:JAZZ is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/11/2026. FINRA publishes updated short interest twice a month.
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