Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Securities registered pursuant to Section 12(b) of the Act: | | Trading | | | --- | --- | --- | | Title of each class | Symbol(s) | Name of each exchange on which registered ...

GCT Semiconductor Holding, Inc. Provides Business Update and Reports Second Quarter 2025 Financial Results Company delivered initial 5G chipset samples to lead customers, in preparation for mass production and volume shipments in the second half of fiscal 2025 SAN JOSE, CA – August 12, 2025 – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today provided an update on business developments and reported finan ...

GCT Semiconductor Holding, Inc. Provides Business Update and Reports First Quarter 2025 Financial Results 5G chipset sampling to customers scheduled to begin at the end of May, following completion of fab, wafer processing and delivery of finalized 5G chipsets to GCT facility SAN JOSE, CA – May 14, 2025 – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today provided an update on business developments and r ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ___________ to ___________ Commission File Number: 001-41013 GCT Semiconductor Holding, Inc. (Exact Name of Registrant as Specified in its Cha ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-41013 GCT Semiconductor Holding, Inc. (Exact name of Registrant as specified in its Charter) | Delaware | 86-217169 ...

GCT Semiconductor Holding, Inc. Provides Business Update and Reports Fourth Quarter and Full Year 2024 Financial Results GCT launches "2025GCT" program to commence "Year of 5G" and celebrate upcoming 5G chipset shipments SAN JOSE, CA – March 25, 2025 – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today provided an update on business developments and reported financial results for the fourth quarter and f ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 (Mark One) FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ___________ to ___________ Commission File Number: 001-41013 GCT Semiconductor Holding, Inc. (Exact Name of Registrant as Specified in its ...

Exhibit 99.1 GCT Semiconductor Holding, Inc. Reports Third Quarter 2024 Financial Results SAN JOSE, CA – November 14, 2024 – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today reported financial results for the third quarter ended September 30, 2024. Third Quarter 2024 Financial Summary and Recent Operational Highlights • Volume shipments of 5G chipsets to commence in the first half of 2025, as previousl ...

Table of Contents Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, par value $0.0001 per share GCTS The New York Stock Exchange Warrants, each whole warrant exercisable for one share of Common Stock for $11.50 per share GCTSW The New York Stock Exchange UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECU ...

Exhibit 99.1 GCT Semiconductor Holding, Inc. Reports Second Quarter 2024 Financial Results SAN JOSE, CA – August 14, 2024 – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today reported financial results for the second quarter ended June 30, 2024. Second Quarter 2024 Financial Summary and Recent Operational Highlights · 5G chipset development progressing as projected with initial deliveries to alpha custom ...