CMOC or CMOC Group Limited, previously known as China Molybdenum Company Limited, is one of the world's largest producers of molybdenum, tungsten, niobium and cobalt. The company accounts for approximately one-third of global cobalt supply. CMOC's headquarters are located in Luanchuan County, close to the city of Luoyang City in Henan. CMOC is listed on the Hong Kong Stock Exchange and Shanghai Stock Exchange, with state-owned entities holding a minority stake. Wikipedia