IOI Corporation Berhad, commonly referred to as IOI, was incorporated on 31 October 1969 as Industrial Oxygen Incorporated Sdn Bhd.[1] IOI is one of Malaysia's biggest conglomerates. It ventured into oil palm plantations in 1983,[2] followed by property development in 1984[3] and refineries in 1997.[2] IOI was listed on the Kuala Lumpur Stock Exchange (KLSE) and trading as MYX: 1961 – now known as Bursa Malaysia – in 1980.[1]
The group was founded and headed by Lee Shin Cheng, the executive chairman, until his death in 2019.[4] Lee Yeow Chor is currently the chief executive.