Royal Dutch Shell plc, (Public, LON:RDSA) commonly known simply as Shell, is a multinational petroleum company of Dutch and British origins. One of the six "supermajors" (vertically integrated private sector oil exploration, natural gas, and petroleum product marketing companies), Shell was listed as the world's largest corporation for 2009 by Fortune. The company's headquarters are in The Hague, Netherlands, with its registered office in London (Shell Centre). The company's main business is the exploration for and the production, processing, transportation, and marketing of hydrocarbons