General Motors Corporation (GM) is a multinational corporation founded in 1908 and headquartered in the United States. As of January 1, 2008, GM is the world's largest automaker as measured by global industry sales and has been the sales leader for the last 77 calendar years. As of 2008, General Motors employs about 266,000 people around the world. It manufactures its cars and trucks in 35 different countries and sells them under the brands of Buick, Cadillac, Chevrolet, GM Daewoo, GMC, Holden, Hummer, Opel, Pontiac, Saab, Saturn and Vauxhall. As of 2007, General Motors is the fifth largest publicly traded company in the world (behind Wal-Mart, Exxon Mobil, Royal Dutch Shell, and BP, ranked by revenue on the Fortune Global 500 list.)