Hsinchu, Taiwan, September 17, 2013 - United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC" or "The Company"), a leading global semiconductor foundry, today announced that Dow Jones Sustainability Index (DJSI) has selected UMC as a global component for the sixth consecutive year. This year, UMC was listed for both the DJSI-World and DJSI-Emerging Markets indexes. DJSI-World 2013 evaluated about 2,500 global enterprises, with only 333 qualifying as global components. Only five semiconductor companies were selected worldwide, with only two listed for DJSI-Emerging Markets.

DJSI scored UMC with perfect marks in Antitrust Policy, Product Quality and Recall Management, Environmental Policy/Management System and Human Capital Development. UMC also achieved the highest scores within its group for Innovation Management and Corporate Citizenship & Philanthropy. UMC's high performance illustrates the company's continued excellence in sustainable operations, which sets a standard for leading global companies and is recognized by international investors.

Po Wen Yen, CEO at UMC, said, "We are pleased at UMC's high ranking after being selected as a DJSI global component for the sixth consecutive year. This achievement will help further motivate UMC's sustainability efforts, as the milestone comes less than one month after UMC received CommonWealth magazine's Global Citizenship Award. The hard work shown by our employees has not only resulted in UMC's repeated selection as a DJSI index component, but also improved overall scores in recent years. Going forward, UMC will continue to strive for excellence by working closely with employees, customers and supply chain partners to drive towards our goal of a sustainable society."

UMC's sustainable activities include green factory, greenhouse gas reduction, energy and resource productivity improvement, healthy work environment, corporate volunteer, sustainable supply chain, etc.

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 is underway 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 concerning these risks is included in UMC's filings with the U.S. SEC, including on Form F-1, F-3, F-6 and 20-F, each as amended.