OIO Group, through its subsidiary, Environmental Solutions (Asia) Pte. Ltd., operates as a waste management, treatment, and recycling company. It engages in the collection and recycling of hazardous and non-hazardous industrial waste from pharmaceutical, semiconductor, petrochemical, and electroplating companies. The company was formerly known as ESGL Holdings Limited and changed its name to OIO Group in March 2026. OIO Group was founded in 1999 and is headquartered in Singapore.