BlackRock is a leader in investment management, risk management and advisory services for institutional and retail clients worldwide. At March 31, 2013, BlackRock's AUM was US$3.936 trillion. BlackRock offers products that span the risk spectrum to meet clients' needs, including active, enhanced and index strategies across markets and asset classes. Products are offered in a variety of structures including separate accounts, mutual funds, iShares® (exchange traded funds), and other pooled investment vehicles. BlackRock also offers risk management, advisory and enterprise investment system services to a broad base of institutional investors through BlackRock Solutions®. Headquartered in New York City, as of March 31, 2013, the firm has approximately 10,600 employees in 30 countries and a major presence in key global markets, including North and South America, Europe, Asia, Australia and the Middle East and Africa.