UMC Reports Sales for September 2021

Taipei, Taiwan, October 6, 2021--United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), today reported unaudited net sales for the month of September 2021.

Revenues for September 2021

Period	2021	2020	Y/Y Change	Y/Y (%)
September	18,750,564	14,533,813	+4,216,751	+29.01%
Jan.-Sep.	153,911,430	131,524,561	+22,386,869	+17.02%

(*) 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.