TAIPEI, Taiwan — (BUSINESS WIRE) — June 8, 2017 — United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of May 2017.

Revenues for May 2017

Period		2017		2016		Y/Y Change		Y/Y (%)
May		12,512,276		12,705,227		-192,951		-1.52%
Jan.-May		61,856,496		57,873,709		+3,982,787		+6.88%

(*) 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.

View source version on businesswire.com: http://www.businesswire.com/news/home/20170608006438/en/

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Contact:

UMC, Investor Relations
Michael Lin, + 886-2-2658-9168, ext. 16900
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or
David Wong, + 886-2-2658-9168, ext. 16900
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