UMC - United Microelectronics March sales down 20% Y/Y April, 10 2023 04:33 AM United Microelectronics Corporation 2023-04-10 04:33:26 ET United Microelectronics ( NYSE: UMC ) shows March sales down 20.11% Y/Y to ~NT$17.69B. Feb sales suffered ~18.6% Overall, three month sales from Jan to March have declined 14.5% For further details see: United Microelectronics March sales down 20% Y/Y