American International Group, Inc. (NYSE: AIG) or AIG is an American multinational insurance corporation. Its corporate headquarters is reported as 180 Maiden Lane in New York City. (was formerly in the American International Building in New York City). The British headquarters office is on Fenchurch Street in London, continental Europe operations are based in La Défense, Paris, and its Asian headquarters office is in Hong Kong. According to the 2011 Forbes Global 2000 list, AIG was the 29th-largest public company in the world. It was listed on the Dow Jones Industrial Average from April 8, 2004 to September 22, 2008.

AIG suffered from a liquidity crisis when its credit ratings were downgraded below "AA" levels in September 2008. The United States Federal Reserve Bank on September 16, 2008 created an $85 billion credit facility to enable the company to meet increased collateral obligations consequent to the credit rating downgrade, in exchange for the issuance of a stock warrant to the Federal Reserve Bank for 79.9% of the equity of AIG. The Federal Reserve Bank and the United States Treasury by May 2009 had increased the potential financial support to AIG, with the support of an investment of as much as $70 billion, a $60 billion credit line and $52.5 billion to buy mortgage-based assets owned or guaranteed by AIG, increasing the total amount available to as much as $182.5 billion. AIG subsequently sold a number of its subsidiaries and other assets to pay down loans received, and continues to seek buyers of its assets.