JEIO Co., Ltd. engages in the secondary battery materials, plant engineering, and equipment manufacturing and distribution businesses in South Korea. It manufactures and sells battery materials, such as carbon nanotubes under the JENOTUBE brand name. The company also provides design engineering, procurement, construction, and commissioning services for projects in various areas, such as rechargeable batteries, electronic materials, environment and energy, chemicals and petrochemicals, and biotechnology. In addition, it offers design, manufacturing, and construction services for equipment, facilities, and pilot plants in various industrial fields, as well as provides agent services to other companies. The company was founded in 1994 and is headquartered in Incheon, South Korea.