OM Holdings Ltd. engages in the mining, processing and sale of specialized metal materials. It operates through the following segments: Mining, Smelting, and Marketing & Trading. The Mining segment refers to the exploration and mining of manganese ore. The Smelting segment consists of production of manganese ferroalloys, ferrosilicon, and manganese sinter ore. The Marketing & Trading segment comprises of trading of manganese ore, manganese ferroalloys, ferrosilicon, sinter ore, chrome ore, and iron ore. The company was founded by Low Ngee Tong in 1994 and is headquartered in Singapore.