Singapore, April 3, 2018 - United Microelectronics Corporation (NYSE:UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced that UMC's Singapore-based Fab 12i was awarded the Watermark Award from Singapore's National Water Agency at a ceremony held at the Kallang River, Bishan-Ang Mo Kio Park. The Watermark Award is Singapore's top award that recognizes outstanding contributions and commitment to protect and raise awareness of water as a precious resource. Fab 12i was the only semiconductor fab to win the award.

Johnson Liu, director of UMC Fab 12i, said: "We are proud to be recognized for our efforts in sustainable manufacturing through Singapore's Watermark Award. This distinction follows upon our recent winning of Singapore's National Water Efficiency Award in November, 2017 and underscores the effectiveness of UMC's industry-leading water conservation measures."

In 2007, the Watermark Awards was introduced to recognize individuals as well as organizations (private sector companies, grassroots organizations, educational institutions, public agencies and non-governmental organizations or NGOs) for their outstanding contributions and commitment to protect and raise awareness of Singapore's precious water resources.

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 high volume 28nm High-K/Metal Gate technology, 14nm FinFET mass production, ultra-low power platform processes specifically developed for Internet of Things (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 nearly 600,000 wafers per month. The company employs over 19,000 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.