OCI Holdings Co Ltd (OCI Holdings) manufactures and sells polysilicon for solar power and related products such as slim rods, basic chemicals and carbon chemicals. The company also offers landlord business and real estate leasing, development of urban projects and generates energy through combined heat and power, a solar power plant downstream.

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OCI Holdings has been actively involved in research and development activities. The company's central research institute has developed technologies that are beneficial in producing products closely related to daily lives, from basic chemical products to renewable energy businesses. The institute has secured the original technology for polysilicon manufacturing, which is the foundation of the solar energy industry, and laid the foundation for the renewable energy business. Currently, the institute is conducting research on the high added value of products such as carbon black and fumed silica, and is accumulating development technologies in the high-purity chemical and energy fields. The company is also striving to establish a business foundation in the semiconductor materials and secondary battery materials fields, which are its new growth engines. The R&D unit of OCI Holdings is its central research institute. The institute is responsible for developing technologies that are beneficial in producing products closely related to daily lives, from basic chemical products to renewable energy businesses. It also conducts research on the high added value of products such as carbon black and fumed silica, and accumulates development technologies in the high-purity chemical and energy fields. The institute is also striving to establish a business foundation in the semiconductor materials and secondary battery materials fields. In FY2024, the company spent KRW3,2178.9 million in R&D, which as a percentage of revenue stood 0.9%.