OM Holdings Limited, an investment holding company, engages in mining, smelting, trading, and marketing ores and ferroalloys. The company operates through Mining, Smelting, and Marketing and Trading segments. It owns Bootu Creek manganese mine that is located in the Northern territory of Australia. The company also provides manganese ferroalloys, ferrosilicon, and manganese sinter ore. In addition, it trades in manganese ore, manganese ferroalloys, ferrosilicon, and sinter ore. The company has operations in Australia, the People's Republic of China, Singapore, Malaysia, and Mauritius. OM Holdings Limited was founded in 1994 and is based in Singapore.