UMC - United Microelectronics February sales down 18.64% Y/Y March, 06 2023 04:30 AM United Microelectronics Corporation 2023-03-06 04:30:26 ET United Microelectronics ( NYSE: UMC ) reported February net sales down by 18.64% Y/Y to NT$16.93B. In January , sales was down 4.31% Y/Y. For further details see: United Microelectronics February sales down 18.64% Y/Y