United Microelectronics Corporation (NYSE:UMC, TWSE: 2303)) ("UMC"), today reported unaudited net sales for the month of September 2026.

Revenues for September 2026

Period

2026

2025

Y/Y Change

Y/Y (%)

September

25,350,431

19,927,175

5,423,256

27.22%

Jan.-Sep.

204,009,681

175,743,654

28,266,027

16.08%

(*) 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.

Michael Lin / David Wong

UMC, Investor Relations

Tel: + 886-2-2658-9168, ext. 16900

Email:

david_wong@umc.com

jinhong_lin@umc.com