0000929638-25-000839.txt : 20250221 0000929638-25-000839.hdr.sgml : 20250221 20250221180212 ACCESSION NUMBER: 0000929638-25-000839 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250219 FILED AS OF DATE: 20250221 DATE AS OF CHANGE: 20250221 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Sum Alex CENTRAL INDEX KEY: 0001543349 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41013 FILM NUMBER: 25653520 MAIL ADDRESS: STREET 1: 2290 NORTH 1ST STREET, SUITE 201 CITY: SAN JOSE STATE: CA ZIP: 95131 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: GCT Semiconductor Holding, Inc. CENTRAL INDEX KEY: 0001851961 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] ORGANIZATION NAME: 04 Manufacturing IRS NUMBER: 862171699 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2290 NORTH 1ST STREET STREET 2: SUITE 201 CITY: SAN JOSE STATE: CA ZIP: 95131 BUSINESS PHONE: 408-434-6040 MAIL ADDRESS: STREET 1: 2290 NORTH 1ST STREET STREET 2: SUITE 201 CITY: SAN JOSE STATE: CA ZIP: 95131 FORMER COMPANY: FORMER CONFORMED NAME: Concord Acquisition Corp III DATE OF NAME CHANGE: 20210318 4 1 form4.xml X0508 4 2025-02-19 0001851961 GCT Semiconductor Holding, Inc. GCTS 0001543349 Sum Alex C/O GCT SEMICONDUCTOR HOLDING, INC. 2290 NORTH 1ST STREET, SUITE 201 SAN JOSE CA 95131 true Sr. VP of Sales and Marketing false Common Stock, par value $0.0001 per share 2025-02-19 4 M 0 13259 0.11 A 108743 D Stock Option (Right to Buy) 0.11 2025-02-19 4 M 0 13259 0 D 2025-02-23 Common Stock 13259 0 D A portion of these shares represent restricted stock units. Options fully vested. /s/ Edmond Cheng, attorney-in-fact 2025-02-21