UMC Reports Sales for May 2021

Taipei, Taiwan, June 4, 2021--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of May 2021.

Revenues for May 2021

Period	2021	2020	Y/Y Change	Y/Y (%)
May	17,189,070	14,745,577	+2,443,493	+16.57%
Jan.-May	80,668,140	72,072,613	+8,595,527	+11.93%

(*) 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 https://www.umc.com.