Realtek Semiconductor Corp (Realtek) designs, develops and distributes integrated circuits (IC). The company provides software and hardware application design, testing, maintenance, and technical consulting services for integrated circuit products. The company offers communications network and connects media products such as Ethernet controllers, USB storage bridge controllers, and integrated wireless LAN and Bluetooth network controllers. It also provides computer peripheral and smart interconnect products, including audio codecs, audio DSP chips, and USB hub controllers. In the multimedia sector, Realtek offers integrated LCD controllers, DisplayPort video translators, and high-end smart connected LCD TV SoCs.

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Realtek is actively engaged in R&D in areas such as communication networks, computer peripherals, multimedia, connected media, and smart interconnect. The company is committed to recruiting outstanding R&D talents and investing resources to develop key technologies or acquire necessary licensed technology. Realtek has established the Realtek Corporate University to enhance the skills of its workforce through various training programs, including new employee orientation, professional R&D training, management and leadership training, self-study and development, tailored professional development plans, and an internship program. As of December 2025, the company has 6,683 employees in R&D. In FY2025, the company incurred an expenditure of TWD35,124.9 million on R&D, which as a percentage of revenue, stood at 28.6%.