¹Unless otherwise stated, all financial figures discussed in this announcement are prepared in accordance with TIFRSs recognized by Financial Supervisory Commission in the ROC, which is different from IFRSs issued by the International Accounting Standards Board. They represent comparisons among the three-month period ending September 30, 2023, the three-month period ending June 30, 2023, and the equivalent three-month period that ended September 30, 2022. For all 3Q23 results, New Taiwan Dollar (NT$) amounts have been converted into U.S. Dollars at the September 30, 2023 exchange rate of NT$ 32.26 per U.S. Dollar.

²Revenue in this section represents wafer sales

³Utilization Rate = Quarterly Wafer Out / Quarterly Capacity

⁴Estimated capacity numbers are based on calculated maximum output rather than designed capacity. The actual capacity numbers may differ depending upon equipment delivery schedules, pace of migration to more advanced process technologies, and other factors affecting production ramp-up.

View source version on businesswire.com: https://www.businesswire.com/news/home/20231025926162/en/

---

Contact:

Michael Lin / David Wong
UMC, Investor Relations
+ 886-2-2658-9168, ext. 16900
jinhong_lin@umc.com
david_wong@umc.com