Form 6-K Filing Summary

United Microelectronics Corporation filed a Form 6-K on May 20, 2026. The filing announced that the company has repurchased an accumulative total of 10,020,000 common shares, amounting to NT$1,089,032,948. The average repurchase price per share was NT$108.69. The company currently holds 30,551,000 of its own shares, which represents 0.24% of the total issued shares. This repurchase activity exceeds the NT$300 million threshold, triggering this announcement.