Illumina (ILMN) Short Interest Ratio & Short Volume $79.37 -4.84 (-5.75%) Closing price 05/21/2025 04:00 PM EasternExtended Trading$80.33 +0.96 (+1.22%) As of 05/21/2025 07:58 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Illumina Short Interest DataIllumina (ILMN) has a short interest of 5.56 million shares. This marks a 1.09% increase in short interest from the previous month. The short interest ratio (days to cover) is 2.1, indicating that it would take 2.1 days of the average trading volume of 2.32 million shares to cover all short positions.Current Short Interest5,560,000 sharesPrevious Short Interest5,500,000 sharesChange Vs. Previous Month+1.09%Dollar Volume Sold Short$431.46 millionShort Interest Ratio2.1 Days to CoverLast Record DateApril 30, 2025Outstanding Shares158,300,000 sharesPercentage of Shares Shorted3.51%Today's Trading Volume2,722,202 sharesAverage Trading Volume2,320,823 sharesToday's Volume Vs. Average117% Short Selling Illumina? Sign up to receive the latest short interest report for Illumina and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartILMN Short Interest Over TimeILMN Days to Cover Over TimeILMN Percentage of Float Shorted Over Time Illumina Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/20255,560,000 shares $431.46 million +1.1%N/A2.1 $77.60 4/15/20255,500,000 shares $410.25 million -2.8%3.5%2 $74.59 3/31/20255,660,000 shares $449.06 million -3.1%3.6%2.1 $79.34 3/15/20255,840,000 shares $499.90 million -10.3%3.7%2.3 $85.60 2/28/20256,510,000 shares $577.70 million +1.1%4.1%2.6 $88.74 2/15/20256,440,000 shares $645.55 million -1.1%4.1%2.7 $100.24 1/31/20256,510,000 shares $864.14 million +9.1%N/A2.9 $132.74 1/15/20255,970,000 shares $813.05 million +18.5%N/A3 $136.19 12/31/20245,040,000 shares $673.50 million -22.6%N/A2.5 $133.63 12/15/20246,510,000 shares $936.59 million -9.7%N/A3.1 $143.87 Get the Latest News and Ratings for ILMN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Illumina and its competitors with MarketBeat's FREE daily newsletter. 11/30/20247,210,000 shares $1.04 billion +10.2%N/A3.8 $144.15 11/15/20246,540,000 shares $883.23 million -2.7%N/A3.5 $135.05 10/31/20246,720,000 shares $968.62 million -0.9%N/A3.9 $144.14 10/15/20246,780,000 shares $1.00 billion +23.3%N/A3.9 $147.61 9/30/20245,500,000 shares $717.26 million +12.7%N/A3.2 $130.41 9/15/20244,880,000 shares $630.40 million +9.2%N/A2.7 $129.18 8/31/20244,470,000 shares $587.36 million +6.2%N/A1.8 $131.40 8/15/20244,210,000 shares $542.25 million -9.7%N/A1.6 $128.80 7/31/20244,660,000 shares $571.32 million -2.5%N/A1.8 $122.60 7/15/20244,780,000 shares $557.16 million -4.8%N/A1.8 $116.56 6/30/20245,020,000 shares $523.99 million -2.3%N/A2 $104.38 6/15/20245,140,000 shares $558.51 million -11.7%N/A2.1 $108.66 5/31/20245,820,000 shares $606.91 million +7.8%N/A3.1 $104.28 5/15/20245,400,000 shares $621.05 million +13.5%N/A3.4 $115.01 4/30/20244,760,000 shares $585.72 million -9.7%N/A2.8 $123.05 4/15/20245,270,000 shares $638.51 million -0.2%N/A3.2 $121.16 3/31/20245,280,000 shares $725.05 million +1.3%N/A3 $137.32 3/15/20245,210,000 shares $665.47 million +5.3%N/A2.9 $127.73 2/29/20244,950,000 shares $692.16 million +3.3%N/A2.5 $139.83 2/15/20244,790,000 shares $699.68 million +2.6%N/A2.2 $146.07 1/31/20244,670,000 shares $667.86 million +0.4%N/A1.8 $143.01 1/15/20244,650,000 shares $641.89 million +9.2%N/A1.7 $138.04 12/31/20234,260,000 shares $593.16 million +5.7%N/A1.6 $139.24 12/15/20234,030,000 shares $512.21 million -19.2%N/A1.6 $127.10 11/30/20234,990,000 shares $508.73 million -7.9%N/A2 $101.95 11/15/20235,420,000 shares $542.92 million +4.6%N/A2.4 $100.17 10/31/20235,180,000 shares $566.80 million -5.7%N/A3.1 $109.42 10/15/20235,490,000 shares $708.81 million -2.7%N/A3.5 $129.11 9/30/20235,640,000 shares $774.26 million -5.2%N/A3.5 $137.28 9/15/20235,950,000 shares $869.59 million +5.5%N/A3.8 $146.15Warning: Prepare to Be Shocked by These Payouts (Ad)There's a strategy out there paying up to 70% on tech stocks like Amazon, Tesla, and Microsoft—stocks that don't even pay dividends. It's fast, it's legal, and most people have no clue it exists.Click here to see how much you could be collecting each month → 8/31/20235,640,000 shares $931.84 million -2.6%N/A3.6 $165.22 8/15/20235,790,000 shares $1.02 billion -3.2%N/A3.7 $176.02 7/31/20235,980,000 shares $1.15 billion -16.4%N/A3.9 $192.15 7/15/20237,150,000 shares $1.34 billion +3.3%N/A4.7 $187.15 6/30/20236,920,000 shares $1.30 billion +23.8%N/A5 $187.49 6/15/20235,590,000 shares $1.17 billion +12.0%N/A4.2 $209.94 5/31/20234,990,000 shares $981.28 million +16.1%N/A4 $196.65 5/15/20234,300,000 shares $880.86 million -4.2%N/A3.5 $204.85 4/30/20234,490,000 shares $922.96 million -2.4%N/A3.6 $205.56 4/15/20234,600,000 shares $1.05 billion +1.3%N/A3.8 $228.01 3/31/20234,540,000 shares $1.06 billion -7.5%N/A3.4 $232.55 3/15/20234,910,000 shares $1.12 billion +13.1%N/A3.7 $228.15 2/28/20234,340,000 shares $864.53 million +6.1%N/A3.4 $199.20 2/15/20234,090,000 shares $875.46 million +4.6%N/A3.3 $214.05 1/31/20233,910,000 shares $837.52 million +2.6%N/A3.2 $214.20 1/15/20233,810,000 shares $766.23 million -1.0%N/A2.9 $201.11 12/30/20223,850,000 shares $778.47 million -4.0%N/A3 $202.20 12/15/20224,010,000 shares $831.91 million -5.2%N/A2.7 $207.46 11/30/20224,230,000 shares $922.48 million -3.2%N/A2.8 $218.08 11/15/20224,370,000 shares $1.04 billion -9.3%N/A2.7 $238.49 10/31/20224,820,000 shares $1.10 billion -3.2%N/A2.7 $228.82 10/15/20224,980,000 shares $992.61 million +15.0%N/A2.9 $199.32 9/30/20224,330,000 shares $826.12 million -0.9%N/A2.6 $190.79 9/15/20224,370,000 shares $882.61 million +0.2%N/A2.9 $201.97 8/31/20224,360,000 shares $879.15 million +24.6%N/A2.7 $201.64 8/15/20223,500,000 shares $793.07 million +17.5%N/A2.3 $226.59 7/31/20222,980,000 shares $645.71 million -16.5%N/A2.1 $216.68 7/15/20223,570,000 shares $675.48 million -7.8%N/A2.5 $189.21 6/30/20223,870,000 shares $713.47 million +12.8%N/A2.9 $184.36 6/15/20223,430,000 shares $664.15 million +38.9%N/A2.7 $193.63 5/31/20222,470,000 shares $591.52 million +22.3%N/A2.4 $239.48 5/15/20222,020,000 shares $471.79 million +9.2%N/A2.1 $233.56 4/30/20221,850,000 shares $548.80 million +16.4%N/A2.1 $296.65 4/15/20221,590,000 shares $535.02 million -3.1%N/A1.9 $336.49 3/31/20221,640,000 shares $573.02 million -4.1%N/A1.7 $349.40 3/15/20221,710,000 shares $534.56 million -2.3%N/A1.8 $312.61 2/28/20221,750,000 shares $571.55 million +6.7%N/A1.7 $326.60 2/15/20221,640,000 shares $561.08 million +3.8%N/A1.5 $342.12 1/31/20221,580,000 shares $551.14 million -11.2%N/A1.5 $348.82 1/15/20221,780,000 shares $721.15 million +4.7%N/A1.8 $405.14 12/31/20211,700,000 shares $646.75 million -0.6%N/A1.8 $380.44 12/15/20211,710,000 shares $669.88 million -5.5%N/A1.8 $391.74 11/30/20211,810,000 shares $661.25 million +4.6%N/A2.1 $365.33 11/15/20211,730,000 shares $655.57 million -16.4%N/A2.1 $378.94 10/29/20212,070,000 shares $859.17 million +12.5%N/A2.5 $415.06 10/15/20211,840,000 shares $754.27 million -12.0%N/A2.3 $409.93 9/30/20212,090,000 shares $847.72 million -14.0%N/A2.7 $405.61 9/15/20212,430,000 shares $1.09 billion +11.0%N/A3.5 $449.88 8/31/20212,190,000 shares $1.00 billion +0.5%N/A3.5 $457.16 8/13/20212,180,000 shares $1.13 billion +0.9%N/A3.4 $517.32July 2025 Rule Change to Impact Retirement Investors (Ad)There's a massive change from a new rule going into effect this July. And it's one the Big Banks are already using to their advantage… It allows them to treat this new asset like actual cash.Yes, Send Me My FREE Retirement Guide 7/30/20212,160,000 shares $1.07 billion -9.2%1.5%3.3 $495.75 7/15/20212,380,000 shares $1.10 billion -7.8%1.6%3.4 $462.49 6/30/20212,580,000 shares $1.22 billion -5.8%1.8%3.5 $473.21 6/15/20212,740,000 shares $1.24 billion -3.9%1.9%3 $451.81 5/28/20212,850,000 shares $1.16 billion -3.7%2.0%3 $405.64 5/14/20212,960,000 shares $1.11 billion +3.5%2.0%2.9 $373.45 4/30/20212,860,000 shares $1.14 billion -1.4%2.0%2.6 $399.93 4/15/20212,900,000 shares $1.15 billion -7.6%2.0%2.5 $398.07 3/31/20213,140,000 shares $1.16 billion -3.7%2.2%2.6 $368.96 3/15/20213,260,000 shares $1.32 billion -3.8%2.2%3 $405.12 2/26/20213,390,000 shares $1.51 billion -10.6%2.3%3 $445.86 2/12/20213,790,000 shares $1.71 billion -8.7%2.6%3.4 $451.22 1/29/20214,150,000 shares $1.82 billion -19.1%2.9%3.7 $438.22 1/15/20215,130,000 shares $1.90 billion +3.0%3.5%4.4 $371.04 12/31/20204,980,000 shares $1.81 billion -4.6%3.4%4.4 $364.09 12/15/20205,220,000 shares $1.81 billion +7.4%3.6%4 $347.11 11/30/20204,860,000 shares $1.54 billion +10.0%3.3%3 $317.03 11/15/20204,420,000 shares $1.37 billion +8.9%3.0%2.9 $308.86 10/30/20204,060,000 shares $1.28 billion -15.8%2.8%2.8 $314.90 10/15/20204,820,000 shares $1.59 billion +23.3%3.3%3.4 $330.12 9/30/20203,910,000 shares $1.21 billion -3.0%2.7%2.8 $309.08 9/15/20204,030,000 shares $1.42 billion +3.1%2.8%3.3 $352.19 8/31/20203,910,000 shares $1.40 billion +10.5%2.7%4.5 $357.22 8/14/20203,540,000 shares $1.23 billion +1.7%2.4%3.9 $347.56 7/31/20203,480,000 shares $1.33 billion +5.5%2.4%3.6 $382.16 7/15/20203,300,000 shares $1.26 billion -4.9%2.3%3.6 $382.33 6/30/20203,470,000 shares $1.29 billion +12.3%2.4%3.5 $370.35 6/15/20203,090,000 shares $1.08 billion +4.4%2.1%2.8 $348.43 5/29/20202,960,000 shares $1.07 billion -2.6%2.0%2.3 $363.05 ILMN Short Interest - Frequently Asked Questions What is Illumina's current short interest? Short interest is the volume of Illumina shares that have been sold short but have not yet been covered or closed out. As of April 30th, traders have sold 5,560,000 shares of ILMN short. Learn More on Illumina's current short interest. What is a good short interest ratio for Illumina? 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. ILMN shares currently have a short interest ratio of 2.0. Learn More on Illumina's short interest ratio. Which institutional investors are shorting Illumina? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Illumina: Jane Street Group LLC, Millennium Management LLC, Cubist Systematic Strategies LLC, Caption Management LLC, PEAK6 LLC, Torno Capital LLC, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, Capital Fund Management S.A., Simplex Trading LLC, XY Capital Ltd, Belvedere Trading LLC, Baader Bank Aktiengesellschaft, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Illumina's short interest increasing or decreasing? Illumina saw a increase in short interest during the month of April. As of April 30th, there was short interest totaling 5,560,000 shares, an increase of 1.1% from the previous total of 5,500,000 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 Illumina's short interest compare to its competitors? Here is how the short interest of companies compare to Illumina: Agilent Technologies, Inc. (1.52%), Mettler-Toledo International Inc. (2.56%), Waters Co. (2.68%), Bio-Techne Co. (4.13%), Bio-Rad Laboratories, Inc. (5.77%), Charles River Laboratories International, Inc. (5.44%), Bruker Co. (7.19%), Pacific Biosciences of California, Inc. (16.40%), Harvard Bioscience, Inc. (3.36%), Thermo Fisher Scientific Inc. (1.20%), 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 Illumina stock? Short selling ILMN is an investing strategy that aims to generate trading profit from Illumina as its price is falling. ILMN shares are trading down $4.84 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 Illumina? A short squeeze for Illumina 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 ILMN, which in turn drives the price of the stock up even further. How often is Illumina'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 ILMN, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies Agilent Technologies Short Interest Mettler-Toledo International Short Interest Waters Short Interest Bio-Techne Short Interest Bio-Rad Laboratories Short Interest Charles River Laboratories International Short Interest Bruker Short Interest Pacific Biosciences of California Short Interest Harvard Bioscience Short Interest Thermo Fisher Scientific 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:ILMN) was last updated on 5/22/2025 by MarketBeat.com Staff From Our PartnersJuly 2025 Rule Change to Impact Retirement InvestorsThere's a massive change from a new rule going into effect this July. 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