Lehman BrothersLehman Brothers Inc. (ˈliːmən ) was an American global financial services firm founded in 1847. Before filing for bankruptcy in 2008, Lehman was the fourth-largest investment bank in the United States (behind Goldman Sachs, Morgan Stanley, and Merrill Lynch), with about 25,000 employees worldwide. It was doing business in investment banking, equity, fixed-income and derivatives sales and trading (especially U.S. Treasury securities), research, investment management, private equity, and private banking.
CitigroupCitigroup Inc. or Citi (stylized as citi) is an American multinational investment bank and financial services corporation headquartered in New York City. The company was formed by the merger of banking giant Citicorp and financial conglomerate Travelers Group in 1998; Travelers was subsequently spun off from the company in 2002. Citigroup owns Citicorp, the holding company for Citibank, as well as several international subsidiaries. Citigroup is incorporated in Delaware.