United Microelectronics : UMC Achieves Highest Corporate Governance Ranking among Taiwan Listed Companies for 10th Consecutive Year

HSINCHU, Taiwan, April 30, 2024 ￚ United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced it placed in the top 5% in the 10^th Corporate Governance Evaluation conducted by the Taiwan Stock Exchange (TWSE) and Taipei Exchange (TPEx), making it one of only 8 companies that have achieved the highest ranking every year since the evaluation began. This recognition affirms UMC's longstanding commitment to best governance practices, including protection of shareholders' rights and interest, structure and operation of Board of Directors, information transparency, and sustainable development.

UMC has actively taken steps to enhance diversity on its Board of Directors. In the candidate list for the new board term, which will be elected at the shareholders' meeting in May, the number of independent directors increased to 6, accounting for two-thirds of the board. New candidates also include two female independent directors, increasing the ratio of female board members to one-third.

With climate change and geopolitical dynamics increasingly impacting operating environment, UMC's board has placed a strong emphasis on sustainable development and risk management. The company has a committee dedicated to enterprise risk management, which is overseen by the ESG Steering Committee led by UMC's Co-Presidents and regularly reports to the Board of Directors.

UMC has received international recognition from authoritative evaluations for the progress the company has made towards sustainable development. It has been included in the Dow Jones Sustainability Indices (DJSI) for 16 consecutive years and achieved an AA rating in the MSCI ESG Ratings last year.

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, BCD etc. Most of UMC's 12-in and 8-in fabs with its core R&D are located in Taiwan, with additional ones throughout Asia. UMC has a total of 12 fabs in production with combined capacity of more than 400,000 wafers per month (12-in equivalent), and all of them are certified with IATF 16949 automotive quality standard. UMC is headquartered in Hsinchu, Taiwan, plus local offices in United States, Europe, China, Japan, Korea & Singapore, with a worldwide total of 20,000 employees. For more information, please visit: http://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.