Silicon Integrated Systems Corp. announced change in representative of the Companys institutional director. Name of legal person: United Microelectronics Corp.

.Name of the previous position holder: Tseng,Kuei-Hung . Resume of the previous position holder: Senior Division Director of UMC. Name of the new position holder: Mou,Ya-Nan .Resume of the new position holder: Associate Vice President of UMC, .Reason for the change: Replacement of representative, Original term:From 21 June 2022 to 20 June 2025, 9.Effective date of the new appointment: 31 July 2023,.Any other matters that need to be specified: None.