Two insiders at United Microelectronics Corp (UMC) executed significant stock sales on September 17, 2026, totaling approximately $228.80 million. Chitung Liu, CFO and SVP, sold a combined 1.6 million shares in two transactions, one for 1.2 million shares at $142.33 per share, valued at $170.80 million, and another for 400,000 shares at $145.00 per share, worth $58.00 million.
While insider selling can be motivated by various factors such as portfolio diversification, tax obligations, or personal financial needs, the scale of these recent transactions may attract investor attention. Previous filings show additional sales by Mr. Liu and another insider, Hu Che-Jen, in preceding months.