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UMC shares rise as sales growth and silicon photonics plans draw buyers
UMC said net sales climbed 17.8% in May and 22.9% in June year over year, alongside its rollout of mass-produced silicon photonics wafers in Singapore.
United Microelectronics (UMC) has climbed about 220% over the past 52 weeks as investors focus on what it expects to be a growth and margin inflection, ahead of its Q2 FY26 results later this month, according to Yahoo Finance.
The stock momentum is being supported by already-reported demand signals, with UMC reporting net sales growth of 17.8% in May and 22.9% in June versus the prior year.
UMC also highlighted technology progress, announcing its first mass-produced silicon photonics wafers at its Singapore facility. The company said the capability is intended to address demand for high-speed optical interconnects used in AI and hyperscaler data center networks, and it is planning to make its 12-inch silicon photonics platform available for customer product development in 2027.
Operationally, UMC is a semiconductor foundry based in Hsinchu City, Taiwan, and it reported that in 2025 its top 10 customers accounted for 57% of revenue, including Texas Instruments and Intel. The company also reported revenue mix by region of 65% from Asia Pacific, 22% from North America, 9% from Europe, and 4% from Japan, with FY25 revenue of $7.6 billion.