UMC Reports Sales for May 2015

Taipei, Taiwan, June 8, 2015--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of May 2015.

Revenues for May 2015

Period	2015	2014	Y/Y Change	Y/Y (%)
May	12,931,054	11,930,014	+1,001,040	+8.39%
Jan.-May	63,601,211	55,152,339	+8,448,872	+15.32%

(*) 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.