1Q 2014 Conference Call and Webcast United Microelectronics Corporation (NYSE: UMC) UMC invites you to join: Po Wen Yen, CEO Chitung Liu, CFO Bowen Huang, Deputy Director of Finance for the upcoming teleconference to discuss UMC’s financial and operating results, and plans for the future. The details are as follows: Wednesday, April 30, 2014 Time: 05:00 PM 05:00 AM 10:00 AM (Taipei) (New York) (London) Agenda: 1Q 2014 Financial and Operating Results Q&A Dial-in numbers and Access Code: USA Toll Free: 1 800 871-3110, 1 888 700-7397 Taiwan: 02 2192-8016 Other Areas: +886 2 2192-8016 Access Code: UMC Webcast A live webcast and replay of the 1Q 2014 results announcement will be available at www.umc.com under “Investors \ Events” section.