Hsinchu, Taiwan, September 16, 2014 – United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC" or "The Company"), a leading global semiconductor foundry, today announced that Dow Jones Sustainability Index (DJSI) selected UMC as a global component for the seventh consecutive year. UMC was listed for both the DJSI-World and DJSI-Emerging Markets indexes. DJSI-World 2014 evaluated about 2,500 global enterprises, with only 319 qualifying as global components. Only five semiconductor companies were selected worldwide, with only two listed for DJSI-Emerging Markets.

DJSI awarded UMC with perfect scores in Antitrust Policy, Product Quality and Recall Management and Environmental Policy/Management System and with high scores in several other categories. UMC’s overall scores have continued to increase in recent years, illustrating the company's continued excellence in sustainable operations. This accomplishment sets a standard for leading global companies and is recognized by international investors.

Po Wen Yen, CEO at UMC, said, "For the seventh consecutive year, DJSI has recognized UMC for our corporate sustainability excellence, listing us as a global component.. We consider sustainability an important core value at UMC, and have proven that foundry business success can coexist with the pursuit of environmental protection and social responsibility goals. We will continue to strive for excellence by leveraging our employees, customers and supply chain partners to work towards our goal of a sustainable society.”

UMC’s social and environmental conservation activities include green factory, greenhouse gas reduction, energy and resource productivity improvement, healthy work environment, corporate volunteer, sustainable supply chain, and more.

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. The Dow Jones Sustainability Emerging Markets Index tracks the performance of the top 10% of the 800 largest Emerging Markets 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 technology and manufacturing for applications spanning every major sector of the IC industry. UMC’s robust foundry solutions allow chip designers to leverage the company’s leading-edge processes, which include 28nm poly-SiON and gate-last High-K/Metal Gate technology, mixed signal/RFCMOS, and a wide range of specialty technologies. Production is supported through 10 wafer manufacturing facilities that include two advanced 300mm fabs; Fab 12A in Taiwan and Singapore-based Fab 12i. Fab 12A consists of Phases 1-4 which are in production for customer products down to 28nm. Construction has been completed for Phases 5&6, with future plans for Phases 7&8. The company employs over 15,000 people worldwide and has offices in Taiwan, mainland 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 future outsourcing, wafer capacity, technologies, 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, including its registration statements and reports on Forms F-1, F-3, F-6, 20-F and 6-K, in each case as amended. 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.