Citigroup Inc., d/b/a Citi,'s a major American financial services company based in New York, NY. Citigroup was formed from one of the world's largest mergers in history by combining the banking giant Citicorp and financial conglomerate Travelers Group on April 7, 1998. Citigroup Inc. has the world's largest financial services network, spanning 140 countries with approximately 12,000 offices worldwide. The company employs approximately 300,000 staff around the world, and holds over 200 million c… (More on Citigroup)