United Microelectronics Corp. (UMC) reported its strongest quarterly run in years as mature-process demand and factory utilization improved. June consolidated revenue reached NT$23.12 billion, up 0.8% from May and 22.85% year-on-year — a 44-month high. Second-quarter revenue climbed to NT$68.73 billion, up 12.61% sequentially and 16.98% year-on-year, the highest level in 15 quarters.