Hsinchu, Taiwan, September 13, 2018 - United Microelectronics Corporation (NYSE:UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced that Dow Jones Sustainability Index (DJSI) has selected UMC as a global component for the 11th consecutive year. DJSI awarded UMC with the industry’s highest scores in "Policy Influence,” “Product Quality and Recall Management,” “Tax Strategy” and “Climate Strategy” categories. Several of those items received full marks. UMC’s overall scores have continued to increase in recent years, illustrating the company's continued excellence in sustainable operations. DJSI-World 2018 evaluated approximately 2,500 global enterprises, with only six semiconductor companies selected worldwide.

SC Chien, co-president at UMC, said, "We are pleased to be selected as a DJSI Global Component for the 11th consecutive year. UMC is committed to the Environment, Society, and Governance (ESG), using this three-pronged sustainability approach to promote the implementation of the 17 global Sustainable Development Goals (SDGs) of the United Nations. In 2018, UMC continued to improve its performance in the implementation of sustainable management strategies. With the help of all UMC employees, we successfully reached the second-year goal of our "Green 2020" plan for saving electricity and water as well as reducing waste. We have also invited our supply chain partners to practice Reuse, Recycle and Reduce concepts through the environmental 3R League initiative and have fully embraced the spirit of global partnership promoted through the United Nations Sustainable Development Goals. Going forward, we will continue enhance our efforts toward sustainability in order to benefit our stakeholders and society.”

Dow Jones Sustainability Indices was launched jointly by Dow Jones Index, STOXX and Sustainable Asset Management (SAM) in 1999. DJSI is the first index that traces social responsibility performance of leading-edge enterprises, and is also one of the most creditable evaluation tools for reviewing sustainability worldwide. The Dow Jones Sustainability World Index and respective subsets track the performance of the top 10% of the 2500 largest companies in the S&P Global Broad Market IndexSM that lead the field in terms of sustainability.

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry that provides advanced IC production for applications spanning every major sector of the electronics industry. UMC’s comprehensive foundry solutions enable chip designers to leverage the company’s sophisticated technology and manufacturing, which include world-class 28nm High-K/Metal Gate technology, 14nm FinFET volume production, specialty process platforms specifically developed for AI, 5G and IoT applications and the automotive industry’s highest-rated AEC-Q100 Grade-0 manufacturing capabilities for the production of ICs found in vehicles. UMC’s 11 wafer fabs are strategically located throughout Asia and are able to produce over 600,000 wafers per month. The company employs more than 20,000 people worldwide, with offices in Taiwan, China, Europe, Japan, Korea, Singapore, and the United States. UMC can be found on the web at 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.