GCT Semiconductor Holding, Inc.

GCT Semiconductor Holding, Inc. is a fabless semiconductor company specializing in the design and supply of advanced 5G and 4G LTE semiconductor solutions. Headquartered in San Jose, California, with an R&D center in Seoul, South Korea, the company's mission is to empower its partners to innovate wireless designs by providing flexible, state-of-the-art 5G, 4G, and Non-Terrestrial Network (NTN) solutions.

The company's product portfolio includes RF and modem chipsets for 4G LTE (including LTE Advanced and LTE Advanced-Pro), cellular IoT chipsets for low-speed mobile networks (such as eMTC/NB-IoT/Sigfox), and comprehensive 5G solutions. These system-on-chip (SoC) solutions integrate radio frequency, baseband modem, and digital signal processing functions, offering high performance, low power consumption, and cost-effectiveness. GCT's technology is utilized in a wide range of commercial devices, including smartphones, tablets, mobile hotspots, routers, CPEs, USB dongles, M2M applications, IoT devices, and connected vehicles.

Under the leadership of CEO John Schlaefer, GCT Semiconductor is actively transitioning its focus towards 5G commercialization. The company announced commercial shipments of its 5G chipsets in January 2026, following successful sampling to lead customers in 2025. GCT has also secured a licensing agreement with a major satellite communications provider and partnered with Skylo Technologies to integrate its 5G and 4G chipsets, aiming to accelerate global satellite connectivity for various devices. The company anticipates sequential quarterly growth in revenue and 5G chipset shipments throughout 2026.