UMC shares rise 14.0% premarket after December revenue growth and partnership with SST on 28nm platform.
ByAinvest
Wednesday, Jan 21, 2026 4:14 am ET1min read
UMC--
United Microelectronics (UMC) surged 13.98% in premarket trading, driven by robust December 2025 revenue growth of 1.7% year-on-year to NT$19.28 billion and a strategic partnership with Microchip Technology’s SST subsidiary. The collaboration introduced the 28nm SuperFlash Gen 4 Automotive Grade 1 Platform, positioning UMC as a leader in automotive semiconductor innovation. Full-year 2025 revenue rose 2.3% to NT$237.5.
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