On July 14, United Microelectronics rose 3.44% in regular trading, trading at $24.08/share, with turnover of $39.31 million.

On the news front, UMC announced that its Singapore facility has completed its first batch of silicon photonics wafer mass production. The company partnered with Singapore-based fabless chip design firm Silith Technology, taking just 18 months to advance the silicon photonics chip platform from R&D to volume production readiness. The technology targets high-speed interconnect needs for next-generation AI infrastructure. Senior Vice President G.C. Hung noted that silicon photonics and co-packaged optics will drive growth over the coming years, with UMC shifting production to 12-inch wafers to improve performance and power efficiency.

Additionally, Citi expressed a bullish outlook on UMC's second-half prospects, projecting Q2 sales to grow 13% sequentially. UMC's Q2 revenue rose nearly 17% year-over-year, marking a 15-quarter high, with the next earnings report scheduled for July 29.

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