From wikipedia:

BlackRock, Inc. (NYSE: BLK) is an American multinational investment management corporation and the world's largest asset manager.[2] Headquartered in New York City, BlackRock is a leading provider of investment, advisory, and risk management solutions[citation needed]. The company acquired Barclays Global Investors in December 2009, solidifying its position as the largest investment manager in the world.[3] As of June 2011, the company has over $3.65 trillion in assets under management. The name is officially spelled in camel case.