MarketAxess Holdings Inc. is engaged in electronic trading of corporate bonds and certain other types of fixed-income securities. Through the Company’s platform, 649 active institutional investor client firms (firms that executed at least one trade through its electronic trading platform between January 2009 and December 2008) can access the aggregate liquidity provided by the collective interest of its 48 broker-dealer clients in buying or selling bonds through its platform. MarketAxess' active institutional investor clients include investment advisers, mutual funds, insurance companies, public and private pension funds, bank portfolios and hedge funds. Its revenues are primarily generated from the trading of United States and European high-grade corporate bonds. On March 5, 2008, the Company acquired Greenline Financial Technologies, Inc.