OM Holdings Limited, an investment holding company, engages in mining, smelting, trading, and marketing manganese ores and ferroalloys in the Asia Pacific, Europe, the Middle East, Africa, and America. The company operates through Mining, Smelting, and Marketing and Trading segments. The company owns and operates the Bootu Creek manganese ore mine located in the Northern territory of Australia. It also produces manganese ferroalloys, ferrosilicon, silicon metal, and manganese sinter ore; and trades in manganese ore, manganese ferroalloys, ferrosilicon, and sinter ore. OM Holdings Limited was founded in 1993 and is based in Singapore.