IOI Corporation Berhad, commonly referred to as IOI, was incorporated on 31 October 1969 as Industrial Oxygen Incorporated Sdn Bhd. IOI is one of Malaysia's biggest conglomerates. It ventured into oil palm plantations in 1983, followed by property development in 1984 and refineries in 1997. IOI was listed on the Kuala Lumpur Stock Exchange and trading as MYX: 1961—now known as Bursa Malaysia—in 1980. The group was founded and headed by Lee Shin Cheng, the executive chairman, until his death in 2019. Lee Yeow Chor is currently the chief executive. Its diverse businesses extend from the upstream plantation in Malaysia and Indonesia, to downstream manufacturing of oleochemicals, specialty oils and fats which are exported to over 70 countries. Wikipedia