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Citigroup Inc. (NYSE:C) is a major American multinational investment bank and financial services corporation headquartered in New York City. Founded in 1812, Citigroup has evolved through numerous mergers and acquisitions to become one of the largest banking institutions in the world. The company operates globally across North America, Latin America, Asia, Europe, the Middle East, and Africa, serving consumers, corporations, governments, and institutions through a diversified portfolio of financial products and services. Citigroup has been publicly traded since 1977 and is currently undergoing a significant organizational transformation aimed at simplifying its structure and improving operational efficiency.