GCT Semiconductor Holding (GCTS) 8-K Entry into a Material Definitive Agreement

Exhibit 3.1

Delaware The First State Page 1 5165196 8100 Authentication: 203116501 SR# 20241176220 Date: 03-26-24 You may verify this certificate online at corp.delaware.gov/authver.shtml I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE RESTATED CERTIFICATE OF “CONCORD ACQUISITION CORP III”, CHANGING ITS NAME FROM "CONCORD ACQUISITION CORP III" TO "GCT SEMICONDUCTOR HOLDING, INC.", FILED IN THIS OFFICE ON THE TWENTY-SIXTH DAY OF MARCH, A.D. 2024, AT 3:41 O`CLOCK P.M.