UNITED MICROELECTRONICS Business Summary

United Microelectronics Corporation (UMC) is a leading global pure-play semiconductor foundry that generates revenue primarily through the contract manufacturing of integrated circuits for fabless semiconductor companies and integrated device manufacturers (IDMs). The company’s business model centers on providing wafer fabrication services across a diverse range of process technologies, with a strategic emphasis on mature and specialty nodes such as 22nm, 28nm, and 40nm. As of early 2026, UMC’s 22/28nm portfolio accounts for approximately 40% of its total revenue, driven by high demand in automotive, IoT, and 5G sectors. In the competitive landscape, UMC ranks as the world’s third-largest dedicated foundry by market share, trailing industry leader TSMC and SMIC while competing closely with GlobalFoundries and Samsung Foundry. The company distinguishes itself by prioritizing operational efficiency and specialty technology leadership over the capital-intensive race for sub-5nm leading-edge nodes. Founded in 1980 as Taiwan’s first commercial semiconductor firm under the guidance of Robert Tsao, UMC recently transitioned from a co-president model to a streamlined executive structure. Effective February 25, 2026, Jason Wang serves as the Chief Executive Officer, having previously led the company’s strategic transformation as Co-President since 2017. He is supported by Ming Hsu, who was appointed President and Chief Operating Officer after more than two decades with the firm overseeing global operations and marketing. The leadership team operates under the oversight of Chairman Stan Hung, while former Co-President SC Chien has transitioned to lead the affiliate Unimicron Technology. UMC is a publicly traded entity on the NYSE and TWSE, with a robust institutional investor base including major asset managers such as BlackRock and Vanguard, reflecting its stability as a critical pillar of the global semiconductor supply chain.