United Microelectronics Corporation (UMC:NYSE) closed at $18.89 on October 23, 2026, up 1.94% on the day. The stock trades 34.8% below its 52-week high of $28.96 and 171.0% above its 52-week low of $6.97. Over the past year, it gained 150.5%. United Microelectronics Corporation is part of the Technology sector (Semiconductors).
In 252 trading sessions since October 23, 2025, UMC closed higher on 133 days (53%). Its best day was January 20, 2026 (+15.91%) and its worst was July 16, 2026 (-10.55%). The stock moved 10% or more in a single session 8 times. It opened at least 5% above the previous day's high 13 times.
United Microelectronics Corporation provides semiconductor wafer foundry solutions. It provides circuit design, mask tooling, wafer fabrication, and assembly and testing services. The company also engages in the research, development, and manufacture of products in the solar energy and LED industries. It primarily serves fabless design companies and integrated device manufacturers. The company operates primarily in Taiwan, Singapore, China, Japan, Europe, and the United States. United Microelectronics Corporation was founded in 1980 and is headquartered in Hsinchu, Taiwan.
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Based on end-of-day data. For information only, not investment advice.