United Microelectronics Corporation (UMC) is a semiconductor foundry headquartered in Hsinchu, Taiwan. It manufactures integrated circuits for customers, using logic and specialty processes; it is not a consumer-electronics brand selling its own line of chips. [UMC company overview]
What is United Microelectronics Corporation?
UMC is a company that fabricates semiconductors designed by other companies. In the foundry model, customers supply chip designs and the foundry manufactures the integrated circuits. UMC describes itself as “a leading global semiconductor foundry company”; that is the company’s own description, not an independent ranking. [UMC company overview]
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UMC says it was founded in 1980 as Taiwan’s first semiconductor company, spun off from the state-owned Industrial Technology Research Institute (ITRI), and transitioned from an integrated device manufacturer to a pure-play foundry in 1995. [UMC company overview]
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What does UMC do?
UMC provides IC fabrication services, with offerings centered on logic and specialty technologies. Its stated process categories include logic and mixed-signal, embedded high-voltage, embedded non-volatile memory, RF SOI, and BCD. These processes support different chip functions and applications; the specific process a customer can use depends on its design and UMC’s process availability. [UMC company overview]
The key distinction is that UMC manufactures chips for customers rather than primarily selling a UMC-branded consumer product. Its role is in the semiconductor supply chain, behind the devices and electronics that use the chips.
Where does UMC operate, and how large is its production footprint?
UMC reports 12 fabs in production and combined capacity of more than 400,000 wafers per month on a 12-inch-equivalent basis. Its overview lists four 12-inch fabs, seven 8-inch fabs, and one 6-inch fab. The company says most of its 12-inch and 8-inch fabs and core research and development are in Taiwan, with additional facilities elsewhere in Asia. These are company-reported figures and can change as facilities and capacity change. [UMC company overview]
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What are UMC’s latest reported financial results?
UMC’s 2025 results, reported by the company, include NT$237,553 million in consolidated revenue, NT$41,716 million in net income attributable to parent shareholders, and earnings per share of NT$3.34. The investor-relations overview also reports a 29.0% gross margin and an 18.5% operating margin for 2025. These are historical 2025 figures, not a description of 2026 performance. [UMC investor-relations overview] [UMC 2025 Form 20-F filing announcement]
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UMC is listed on the Taiwan Stock Exchange under ticker 2303 and on the New York Stock Exchange under ticker UMC. A stock listing identifies its shares; it does not change the company’s core business as a semiconductor foundry. [UMC investor-relations overview]
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