ees: 160,000 Local executive: Patrick D. O'Brien 2007 revenue: $53.6 billion 2007 net income/(loss): $8.1 billion Description: Wells Fargo, based in San Francisco, is a diversified financial services company providing banking, insurance, wealth management and estate planning, investments, mortgage and consumer finance to more than 23 million customers from more than 6,000 stores, its Web site and