Taipei, Taiwan, April 27, 2023 – United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today filed its 2022 annual report on Form 20-F with the US Securities and Exchange Commission. The report is available at https://www.umc.com/en/Download/annual_reports.

Shareholders may request a hard copy of the Form 20-F free of charge. Please contact UMC-IR at ir@umc.com.

About UMC
UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry company. The company provides high quality IC fabrication services, focusing on logic and various specialty technologies to serve all major sectors of the electronics industry. UMC’s comprehensive IC processing technologies and manufacturing solutions include logic/mixed-signal, embedded high-voltage, embedded non-volatile-memory, RFSOI and BCD. UMC has total 12 fabs in production with combined capacity of approximately 850,000 8-inch equivalent wafers per month, and all of them are certified with IATF 16949 automotive quality standard. Most of UMC's 12-inch and 8-inch fabs with its core R&D are located in Taiwan, with additional ones throughout Asia. UMC is headquartered in Hsinchu, Taiwan, plus local offices in China, United States, Europe, Japan, Korea and Singapore, with worldwide total 20,000 employees. For more information, please visit: https://www.umc.com.

Note from UMC Concerning Forward-Looking Statements

Some of the statements in the foregoing announcement are forward-looking within the meaning of the U.S. Federal Securities laws, including statements about introduction of new services and technologies, future outsourcing, competition, wafer capacity, business relationships and market conditions. Investors are cautioned that actual events and results could differ materially from these statements as a result of a variety of factors, including conditions in the overall semiconductor market and economy; acceptance and demand for products from UMC; and technological and development risks. Further information regarding these and other risks is included in UMC’s filings with the U.S. Securities and Exchange Commission. UMC does not undertake any obligation to update any forward-looking statement as a result of new information, future events or otherwise, except as required under applicable law.