United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of March 2018.

Revenues for March 2018

Period       2018               2017               Y/Y Change               Y/Y (%)             March       12,412,192               12,751,189               -338,997               -2.66% Jan.-Mar.       37,497,137               37,417,950               +79,187               +0.21%

(*) All figures in thousands of New Taiwan Dollars (NT$), except for percentages(**) All figures are consolidated

Additional information about UMC is available on the web at http://www.umc.com.

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UMCInvestor RelationsMichael Lin, + 886-2-2658-9168, ext. 16900jinhong_lin@umc.comorDavid Wong, + 886-2-2658-9168, ext. 16900david_wong@umc.com