United Microelectronics (UMC) Stock Chart & Stock Price History $7.47 -0.06 (-0.80%) Closing price 07/18/2025 03:59 PM EasternExtended Trading$7.44 -0.03 (-0.39%) As of 08:00 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 Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock United Microelectronics Stock Price Performance The United Microelectronics (UMC) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 4.48%, with a year-to-date return of 15.10%. In the past month, the stock has decreased 8.65%, reflecting recent market activity. As of the latest close, United Microelectronics traded at $7.47 with a market cap of $18.77 billion and volume of 3.46 million shares. Five years ago, the stock traded at $2.89, representing a 158.48% increase over that period. At the time, it had a market cap of $6.79 billion and a volume of 911,100 shares. Receive UMC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for United Microelectronics and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+0.34%1 Month Performance-8.65%3 Month Performance+11.00%Year-To-Date Performance+15.10%1 Year Performance-4.48%5 Year Performance+158.48% UMC Stock Chart for Monday, July, 21, 2025 UMC Chart by TradingView United Microelectronics Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization07/18/2025$7.53$7.47-0.73%$7.52$7.443.46 million shs$18.77 billion07/17/2025$7.45$7.53+1.07%$7.54$7.436.37 million shs$18.90 billion07/16/2025$7.47$7.45-0.33%$7.47$7.317.90 million shs$18.70 billion07/15/2025$7.45$7.47+0.34%$7.54$7.464.75 million shs$18.77 billion07/14/2025$7.50$7.45-0.73%$7.46$7.377.29 million shs$18.70 billion07/11/2025$7.56$7.50-0.73%$7.53$7.484.10 million shs$18.84 billion07/10/2025$7.70$7.56-1.88%$7.66$7.544.16 million shs$18.98 billion07/09/2025$7.63$7.70+0.92%$7.73$7.635.61 million shs$19.34 billion07/08/2025$7.54$7.63+1.19%$7.69$7.555.06 million shs$19.17 billion07/07/2025$7.82$7.54-3.52%$7.63$7.508.65 million shs$18.94 billion 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. 07/04/2025$7.82$7.82$7.86$7.814.53 million shs$19.63 billion07/03/2025$7.86$7.82-0.57%$7.86$7.814.53 million shs$19.63 billion07/02/2025$7.63$7.86+3.01%$7.87$7.6211.36 million shs$19.75 billion07/01/2025$7.64$7.63-0.13%$7.65$7.565.52 million shs$19.17 billion06/30/2025$7.68$7.64-0.46%$7.69$7.577.03 million shs$19.19 billion06/27/2025$7.56$7.68+1.59%$7.70$7.606.51 million shs$19.28 billion06/26/2025$7.64$7.56-1.11%$7.63$7.536.28 million shs$18.98 billion06/25/2025$7.86$7.64-2.77%$7.76$7.637.36 million shs$19.19 billion06/24/2025$8.12$7.86-3.23%$7.89$7.7211.76 million shs$19.74 billion06/23/2025$8.18$8.12-0.70%$8.13$7.9810.46 million shs$20.40 billion06/20/2025$8.26$8.18-0.94%$8.27$8.169.67 million shs$20.54 billion Related Companies NXP Semiconductors Stock Chart L3Harris Technologies Stock Chart Vertiv Stock Chart STMicroelectronics Stock Chart Nokia Stock Chart Ericsson Stock Chart Ubiquiti Stock Chart ON Semiconductor Stock Chart ASE Technology Stock Chart GlobalFoundries Stock Chart Receive UMC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for United Microelectronics and its competitors with MarketBeat's FREE daily newsletter. 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