KOSY Joint Stock Company engages in the real estate and construction businesses in Vietnam. It provides real estate consulting, brokerage, auctioning, advertising, management, and exchange platform services; restaurants and mobile catering services; accommodation services; direct support services for railway and road transport; industrial cleaning services; and training services. The company also engages in mining of non-ferrous and ferrous metal ores, including black metals, precious metal ores, and iron ore; production of other non-metallic mineral products and construction materials; entertainment activities; domestic and international travel business; site preparation; urban and rural planning, interior and exterior design of works, architectural design, and design of construction site; rental of machinery, equipment, and other tangible goods; cleaning of houses and works; planting trees, caring for and maintaining parks, flower gardens, and other public areas; hydropower business; retail of computers, peripheral equipment, software, and telecommunications equipment; warehousing and storage of goods; railway and road construction; road freight loading and unloading; electricity production and distribution; road passenger and freight transport; shipping and delivery of goods; motor vehicle rental; installation and repair of telecommunications works, and telecommunications activities; treatment and disposal of hazardous waste, and drainage and wastewater treatment; exploitation of stone, sand, and gravel; land use rights auctioning; and hydropower business. In addition, it is involved in the wholesale of mining and construction machinery, equipment and spare parts; textile, garment, electronic, telecommunications, agricultural, and footwear machinery, equipment and spare parts; medical machinery and equipment; and computers, peripherals, and software. The company was incorporated in 2008 and is headquartered in Hanoi, Vietnam.