United Microelectronics (UMC) Short Interest Ratio & Short Volume $7.88 +0.13 (+1.61%) Closing price 06/10/2025 03:59 PM EasternExtended Trading$7.94 +0.06 (+0.76%) As of 05:11 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock United Microelectronics Short Interest DataUnited Microelectronics (UMC) has a short interest of 72.57 million shares, representing 3.15% of the float (the number of shares available for trading by the public). This marks a 4.45% increase in short interest from the previous month. The short interest ratio (days to cover) is 5.2, indicating that it would take 5.2 days of the average trading volume of 12.68 million shares to cover all short positions.Current Short Interest72,570,000 sharesPrevious Short Interest69,480,000 sharesChange Vs. Previous Month+4.45%Dollar Volume Sold Short$568.22 millionShort Interest Ratio5.2 Days to CoverLast Record DateMay 15, 2025Outstanding Shares2,512,143,000 sharesShort Percent of Float3.15%Today's Trading Volume11,391,243 sharesAverage Trading Volume12,681,077 sharesToday's Volume Vs. Average90% Short Selling United Microelectronics? Sign up to receive the latest short interest report for United Microelectronics and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartUMC Short Interest Over TimeUMC Days to Cover Over TimeUMC Percentage of Float Shorted Over Time United Microelectronics Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/202572,570,000 shares $568.22 million +4.5%3.1%5.2 $7.83 4/30/202569,480,000 shares $489.83 million -10.3%N/A4.7 $7.05 4/15/202577,460,000 shares $536.41 million -2.5%3.4%5.1 $6.93 3/31/202579,450,000 shares $569.10 million -8.9%3.4%5.3 $7.16 3/15/202587,210,000 shares $590.85 million +4.7%3.8%6.6 $6.78 2/28/202583,300,000 shares $538.53 million +4.5%3.6%6.4 $6.47 2/15/202579,680,000 shares $499.20 million +3.2%3.5%6.7 $6.27 1/31/202577,240,000 shares $446.83 million +2.0%N/A6.6 $5.79 1/15/202575,750,000 shares $480.26 million -6.0%N/A6.2 $6.34 12/31/202480,550,000 shares $522.77 million -0.2%N/A7 $6.49 Get the Latest News and Ratings for UMC and Related StocksEnter your email address below to receive the latest news and analysts' ratings for United Microelectronics and its competitors with MarketBeat's FREE daily newsletter. 12/15/202480,700,000 shares $515.67 million +2.1%N/A6.9 $6.39 11/30/202479,060,000 shares $533.66 million +5.0%N/A6.7 $6.75 11/15/202475,320,000 shares $511.05 million +28.7%N/A6.1 $6.79 10/31/202458,540,000 shares $400.41 million +9.1%N/A4.7 $6.84 10/15/202453,650,000 shares $426.52 million +11.5%N/A4 $7.95 9/30/202448,110,000 shares $405.09 million +3.7%N/A3.4 $8.42 9/15/202446,380,000 shares $397.48 million +2.3%N/A3.4 $8.57 8/31/202445,320,000 shares $397.46 million -4.4%N/A3.5 $8.77 8/15/202447,420,000 shares $415.87 million +8.4%N/A3.9 $8.77 7/31/202443,750,000 shares $366.63 million -19.2%N/A4 $8.38 7/15/202454,110,000 shares $443.16 million -2.6%N/A5.8 $8.19 6/30/202455,560,000 shares $486.71 million -3.7%N/A6.7 $8.76 6/15/202457,690,000 shares $503.63 million -3.9%N/A7.2 $8.73 5/31/202460,050,000 shares $511.03 million +10.2%N/A7.5 $8.51 5/15/202454,510,000 shares $446.98 million -3.5%N/A6.9 $8.20 4/30/202456,490,000 shares $434.41 million -5.9%N/A7.2 $7.69 4/15/202460,050,000 shares $468.99 million -3.4%N/A7.5 $7.81 3/31/202462,190,000 shares $503.12 million +6.4%N/A8.3 $8.09 3/15/202458,470,000 shares $470.10 million +2.4%N/A7.8 $8.04 2/29/202457,100,000 shares $438.53 million -0.5%N/A7.8 $7.68 2/15/202457,410,000 shares $448.09 million -0.1%N/A8.4 $7.81 1/31/202457,440,000 shares $441.71 million -5.0%N/A8.5 $7.69 1/15/202460,450,000 shares $480.58 million +0.2%N/A9.1 $7.95 12/31/202360,360,000 shares $510.65 million -5.4%N/A9.5 $8.46 12/15/202363,820,000 shares $516.94 million +0.7%N/A10.2 $8.10 11/30/202363,380,000 shares $493.73 million -3.5%N/A10.4 $7.79 11/15/202365,690,000 shares $501.21 million +6.2%N/A10.6 $7.63 10/31/202361,860,000 shares $440.75 million +2.8%N/A10.2 $7.13 10/15/202360,150,000 shares $427.07 million +2.7%N/A10.3 $7.10 9/30/202358,600,000 shares $413.72 million +15.5%N/A10 $7.06The End of Elon Musk…? (Ad)The End of Elon Musk? Don't make him laugh. Jeff Brown has been hearing this same tired story for years, and he's been proven right time and time again. And now, while the media focuses on Tesla's "demise," he's uncovered an AI breakthrough that's about to make Elon's doubters eat their words yet again. 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. 9/15/202350,760,000 shares $370.04 million +1.8%N/A8.6 $7.29 8/31/202349,850,000 shares $357.18 million +3.4%N/A8.4 $7.17 8/15/202348,230,000 shares $334.96 million +5.9%N/A7.6 $6.95 7/31/202345,560,000 shares $342.16 million +3.2%N/A7.1 $7.51 7/15/202344,160,000 shares $344.89 million -3.0%N/A6.7 $7.81 6/30/202345,510,000 shares $359.07 million -7.9%N/A7.2 $7.89 6/15/202349,400,000 shares $440.90 million -8.3%N/A7.7 $8.93 5/31/202353,880,000 shares $445.32 million +5.6%N/A8 $8.27 5/15/202351,020,000 shares $402.55 million +4.7%N/A8 $7.89 4/30/202348,710,000 shares $391.14 million -2.6%N/A7.3 $8.03 4/15/202350,020,000 shares $418.67 million -2.3%N/A7 $8.37 3/31/202351,220,000 shares $448.69 million -6.6%N/A6.9 $8.76 3/15/202354,810,000 shares $456.02 million +0.8%N/A7.2 $8.32 2/28/202354,390,000 shares $442.19 million +5.6%N/A7.2 $8.13 2/15/202351,530,000 shares $424.61 million -3.3%N/A6.6 $8.24 1/31/202353,280,000 shares $433.17 million +2.2%N/A6.1 $8.13 1/15/202352,160,000 shares $391.20 million +3.2%N/A5.7 $7.50 12/30/202250,560,000 shares $330.16 million +2.4%N/A5.1 $6.53 12/15/202249,390,000 shares $345.73 million -1.0%N/A4.9 $7.00 11/30/202249,880,000 shares $376.10 million -1.7%N/A5 $7.54 11/15/202250,730,000 shares $384.53 million -12.1%N/A5.1 $7.58 10/31/202257,720,000 shares $342.28 million +12.8%N/A6.2 $5.93 10/15/202251,190,000 shares $297.93 million -2.3%N/A5.9 $5.82 9/30/202252,410,000 shares $291.92 million +5.9%N/A6.4 $5.57 9/15/202249,510,000 shares $314.39 million -3.8%N/A5.9 $6.35 8/31/202251,460,000 shares $341.18 million +2.8%N/A6 $6.63 8/15/202250,040,000 shares $363.79 million -17.0%N/A5.8 $7.27 7/31/202260,290,000 shares $411.18 million +5.4%N/A6.8 $6.82 7/15/202257,220,000 shares $383.37 million +6.6%N/A6.3 $6.70 6/30/202253,670,000 shares $363.35 million +1.3%N/A6 $6.77 6/15/202252,990,000 shares $445.12 million -3.9%N/A5.9 $8.40 5/31/202255,120,000 shares $485.61 million -2.6%N/A6 $8.81 5/15/202256,570,000 shares $473.49 million -0.1%N/A5.8 $8.37 4/30/202256,600,000 shares $450.54 million -7.2%N/A5.6 $7.96 4/15/202261,010,000 shares $494.18 million +15.2%N/A5.6 $8.10 3/31/202252,950,000 shares $482.90 million +0.7%N/A4.9 $9.12 3/15/202252,560,000 shares $470.94 million +3.5%N/A5.4 $8.96 2/28/202250,770,000 shares $471.15 million -8.7%N/A5.4 $9.28 2/15/202255,580,000 shares $550.24 million +10.1%N/A6.1 $9.90 1/31/202250,500,000 shares $496.42 million +20.6%N/A5.9 $9.83 1/15/202241,880,000 shares $489.58 million +15.6%N/A5 $11.69 12/31/202136,230,000 shares $423.89 million +10.7%N/A4.8 $11.70 12/15/202132,720,000 shares $375.30 million -3.1%N/A4.2 $11.47 11/30/202133,780,000 shares $392.86 million -7.2%N/A4.6 $11.63 11/15/202136,380,000 shares $414.00 million +35.7%N/A4.8 $11.38 10/29/202126,820,000 shares $275.44 million +18.1%N/A3.4 $10.27 10/15/202122,720,000 shares $236.06 million +25.0%N/A3 $10.39 9/30/202118,170,000 shares $207.68 million -7.5%N/A2.4 $11.43 9/15/202119,640,000 shares $235.09 million +3.5%N/A2.8 $11.97 8/31/202118,970,000 shares $215.69 million +37.2%N/A2.7 $11.37The End of Elon Musk…? (Ad)The End of Elon Musk? Don't make him laugh. Jeff Brown has been hearing this same tired story for years, and he's been proven right time and time again. And now, while the media focuses on Tesla's "demise," he's uncovered an AI breakthrough that's about to make Elon's doubters eat their words yet again. 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. 8/13/202113,830,000 shares $144.11 million +21.0%N/A2.1 $10.42 7/30/202111,430,000 shares $120.36 million -8.7%N/A1.7 $10.53 7/15/202112,520,000 shares $118.56 million -11.6%N/A2 $9.47 6/30/202114,170,000 shares $133.91 million +1.9%N/A2.3 $9.45 6/15/202113,910,000 shares $132.98 million -8.1%N/A2.2 $9.56 5/28/202115,140,000 shares $142.47 million +24.6%N/A2.5 $9.41 5/14/202112,150,000 shares $103.52 million +28.3%N/A1.8 $8.52 4/30/20219,470,000 shares $95.93 million -15.9%N/A1.4 $10.13 4/15/202111,260,000 shares $102.92 million -1.8%N/A1.6 $9.14 3/31/202111,460,000 shares $101.88 million -24.1%N/A1.5 $8.89 3/15/202115,100,000 shares $132.58 million -0.5%N/A2.1 $8.78 2/26/202115,170,000 shares $147.45 million -2.6%N/A2 $9.72 2/12/202115,580,000 shares $165.15 million -9.8%N/A2.2 $10.60 1/29/202117,270,000 shares $160.27 million +83.7%N/A2.7 $9.28 1/15/20219,400,000 shares $89.39 million +21.5%N/A1.5 $9.51 12/31/20207,740,000 shares $67.03 million +2.5%N/A1.6 $8.66 12/15/20207,550,000 shares $62.06 million +41.4%N/A1.7 $8.22 11/30/20205,340,000 shares $37.22 million +212.3%N/A1.3 $6.97 10/30/20201,420,000 shares $7.72 million +30.3%N/A0.5 $5.44 10/15/20201,090,000 shares $6.00 million +44.5%N/A0.4 $5.50 9/30/2020754,300 shares $3.61 million -3.5%N/A0.3 $4.79 9/15/2020781,800 shares $3.38 million +59.9%N/A0.4 $4.32 8/31/2020488,900 shares $1.73 million -17.1%N/A0.3 $3.54 8/14/2020589,500 shares $2.33 million -42.8%N/A0.3 $3.96 7/31/20201,030,000 shares $3.81 million +29.4%N/A0.6 $3.70 7/15/2020796,100 shares $2.20 million -10.6%N/A0.8 $2.76 6/30/2020890,300 shares $2.35 million -14.4%N/A1 $2.64 6/15/20201,040,000 shares $2.72 million +8.5%N/A1.1 $2.62 UMC Short Interest - Frequently Asked Questions What is United Microelectronics' current short interest? Short interest is the volume of United Microelectronics shares that have been sold short but have not yet been closed out or covered. As of May 15th, traders have sold 72,570,000 shares of UMC short. 3.15% of United Microelectronics' shares are currently sold short. Learn More on United Microelectronics' current short interest. What is a good short interest ratio for United Microelectronics? 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. UMC shares currently have a short interest ratio of 5.0. Learn More on United Microelectronics's short interest ratio. Which institutional investors are shorting United Microelectronics? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of United Microelectronics: Jane Street Group LLC, Parallax Volatility Advisers L.P., Sculptor Capital LP, Walleye Trading LLC, Walleye Capital LLC, Simplex Trading LLC, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for United Microelectronics? 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. 3.15% of United Microelectronics' floating shares are currently sold short. Is United Microelectronics' short interest increasing or decreasing? United Microelectronics saw a increase in short interest in May. As of May 15th, there was short interest totaling 72,570,000 shares, an increase of 4.4% from the previous total of 69,480,000 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 United Microelectronics' short interest compare to its competitors? 3.15% of United Microelectronics' shares are currently sold short. Here is how the short interest of companies in the industry of "electronic equipment" compare to United Microelectronics: NXP Semiconductors (2.94%), L3Harris Technologies, Inc. (2.06%), Vertiv Holdings Co (3.49%), Nokia Oyj (0.59%), Telefonaktiebolaget LM Ericsson (publ) (1.41%), STMicroelectronics (1.60%), Ubiquiti Inc. (10.03%), ASE Technology Holding Co., Ltd. (0.60%), GlobalFoundries Inc. (8.64%), Hubbell Incorporated (4.97%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short United Microelectronics stock? Short selling UMC is an investing strategy that aims to generate trading profit from United Microelectronics as its price is falling. UMC shares are trading up $0.13 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 United Microelectronics? A short squeeze for United Microelectronics 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 UMC, which in turn drives the price of the stock up even further. How often is United Microelectronics' 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 UMC, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies NXP Semiconductors Short Squeeze L3Harris Technologies Short Squeeze Vertiv Short Squeeze Nokia Oyj Short Squeeze Telefonaktiebolaget LM Ericsson (publ) Short Squeeze STMicroelectronics Short Squeeze Ubiquiti Short Squeeze ASE Technology Short Squeeze GlobalFoundries Short Squeeze Hubbell Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:UMC) was last updated on 6/11/2025 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 | SponsoredTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? 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