Exhibit 99.4

United Microelectronics Corporation

For the month of April, 2024

This is to report 1) the trading of directors, executive officers and 10% shareholders of United Microelectronics Corporation (“UMC”) (NYSE: UMC); 2) the pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC;

1) The trading of directors, executive officers and 10% shareholders

Title	Name		Number of shares as of March 31, 2024		Number of shares as of April 30, 2024		Changes
Vice President		Jerry CJ Hu		3,143,000		3,133,000		(10,000	)

2) The pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders:

Title	Name		Number of shares as of March 31, 2024		Number of shares as of April 30, 2024		Changes
Vice President		Steven S Liu		2,700,000		2,200,000		(500,000	)