GCT Semiconductor Holding, Inc.

GCT Semiconductor Holding, Inc. is a fabless semiconductor company that designs, manufactures, and sells communication semiconductors. These include high-speed wireless communication technologies like 5G/4.75G/4.5G/4G transceivers (RF) and modems, used in industrial, business-to-business (B2B), and consumer applications. The company supplies communication semiconductor chipsets and modules to wireless operators globally, as well as to original design manufacturers (ODMs) and original equipment manufacturers (OEMs). Their products are used in portable wireless routers (e.g., Mobile Router (MiFi)), indoor and outdoor fixed wireless routers (e.g., customer premise equipment (CPE)), industrial machine-to-machine (M2M) applications, and smartphones. GCT's headquarters in San Jose, California, manage sales, marketing, and accounting. Product design, development, and customer support are handled by wholly owned subsidiaries in South Korea, one of which is a research and development center. The company also has sales offices for local technical support and sales in Taiwan, China, and Japan. GCT released its first 5G product with commercial shipments in the fourth quarter of 2025. This expands its existing portfolio of RF and modem chipsets based on 4th generation (4G) Long Term Evolution (LTE) technology. These 4G chipsets offer varying speeds and functionalities, including 4G LTE, 4.5G LTE Advanced (twice the speed of LTE), and 4.75G LTE Advanced-Pro (four times the speed of LTE). The company also develops and sells cellular Internet of Things (IoT) chipsets for low-speed mobile networks like eMTC/NB-IOT/Sigfox and other network protocols. GCT anticipates continued demand for its 4G LTE product lineup (4.75G/4.5G/4G, etc.) as these products are expected to coexist with 5G products at lower price points.