OIO Group operates as a waste management, treatment, and recycling company. The company is involved in the collection and recycling of hazardous and non-hazardous industrial waste from customers, such as pharmaceutical, semiconductor, petrochemical and electroplating companies. It also trades and sells products made from recycled waste; and engages in warehousing and distribution of circular products including zinc, precious metals, and base metals. The company was founded in 1959 and is headquartered in Singapore, Singapore.