United Microelectronics approves approximately $3.2 billion in new capital spending

The chipmaker is accelerating expansions in Singapore and Tainan to chase AI demand, and its stock fell around 9% the next day United Microelectronics Corporation (UMC) wants a bigger piece of the AI buildout, and it is willing to pay for it. On October 28, 2026, the company approved an additional capital expenditure budget of approximately $3.2 billion to speed up facility expansions in Singapore and Tainan, Taiwan. Investors responded the way investors often do when a company announces it will spend billions: they sold first and asked questions later. The new money sits on top of UMC’s existing $2 billion cash-based CAPEX outlook for 2026, which the company maintained. Put simply, UMC isn’t swapping out its old spending plan. It is stacking a much larger one on top.

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