High Quality Content by WIKIPEDIA articles! Glencore International plc (LSE: GLEN, SEHK: 0805) is a multinational mining and commodities trading company headquartered in Baar, Switzerland and with its registered office in Saint Helier, Jersey. It is the world`s largest commodities trading company, with a 2010 global market share of 60 percent in the internationally tradeable zinc market, 50 percent in the internationally tradeable copper market, 9 percent in the internationally tradeable grain market and 3 percent in the internationally tradeable oil market.