On August 24, United Microelectronics rose 6.08% in regular trading, trading at $19.44/share, with turnover of $17.81 million, notably outperforming the broader semiconductor sector which traded largely in the red.

On the news front, United Microelectronics' silicon photonics foundry business achieved a major milestone. The company successfully delivered its first batch of 12-inch silicon photonics mass-production wafers at its Singapore fab, making it one of the few foundries globally capable of 12-inch PIC mass production. CEO Jason Wang stated that AI-related foundry revenue will grow from $3 billion this year to over $10 billion within three years, with silicon photonics serving as a key growth driver.

Additionally, AI spillover effects have pushed mature-node processes into a price-hike cycle, with UMC's capacity utilization exceeding 90% and some critical chip orders booked through next year. The company's Q2 EPS of $0.54 beat the consensus estimate of $0.15 by 260%, and its board approved approximately $5 billion in capital expenditure for capacity expansion across Singapore and Taiwan facilities.

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