UMC Reports Sales for December 2012

TAIPEI, Taiwan, Jan. 8, 2013 /PRNewswire/ — United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of December 2012.

Revenues for December 2012

              Period                   2012          2011       Y/Y Change            Y/Y (%) M/M (%)
              ------                   ----          ----       ----------            -------  -------
             December             7,796,821     8,104,902              -308,081             -3.80%   -13.47%
             --------             ---------     ---------              --------             -----    ------
            Jan.-Dec.           105,998,159   105,879,723              +118,436             +0.11%      N/A
            ---------           -----------   -----------              --------              -----      ---
    (*) All figures in thousands of New Taiwan Dollars (NT$), except for percentages.

Additional information about UMC is available on the web at

http://www.umc.com.

Contacts:

    Bowen Huang / Peter Lu
    UMC, Investor Relations
    Tel:                        +886-2-2658-9168, ext. 16944 / 16904
    Email:        bowen_huang@umc.com
                  peter_lu@umc.com

SOURCE United Microelectronics Corporation