UMC - United Microelectronics May sales drop 23% June, 06 2023 04:52 AM United Microelectronics Corporation 2023-06-06 04:52:34 ET United Microelectronics ( NYSE: UMC ) shows May sales down 23.14% Y/Y to ~NT$18.78B. April sales dropped ~19% Y/Y . Overall, five month sales from Jan to May have declined 17.4%. For further details see: United Microelectronics May sales drop 23%