United Microelectronics Corporation (Form4): CFO & SVP of United Microelectronics Corporation (Taiwan-based semiconductor manufacturer) executed a significant stock sale of 1.9 million common shares on July 13, 2026, at $154.89 per share, reducing direct holdings while maintaining substantial indirect ownership through spouse and trust arrangements. This insider transaction in a critical semiconductor firm signals potential confidence shifts or portfolio rebalancing by senior management during a period of elevated geopolitical tension in the semiconductor supply chain.