OM Holdings Limited is an investment holding company and manganese-focused producer. The Company is engaged in exploration, project development, operations, and marketing and trading. Its segments include Mining, Smelting, and Marketing and Trading. The Mining segment is engaged in exploration and mining of manganese ore. The Smelting segment is engaged in the production of manganese ferroalloys and manganese sinter ore. The Marketing and Trading segment is engaged in trading of manganese ore, manganese ferroalloys and sinter ore, chrome ore and iron ore. Its operations include exploration, mining, processing, smelting, sintering, and marketing and trading. It is engaged in mining manganese product in Australia and South Africa, and smelting in Sarawak, East Malaysia. The Company, through a subsidiary, owns the Bootu Creek manganese mine in the Northern Territory. It also owns an investment in Main Street 774 (Pty) Limited, which owns interest in the Tshipi Borwa manganese mine.