The total revenue for the first quarter of 2012 decreased 1% to $2.25bn, compared to $2.28m for the same period a year ago.
Operating income was $815m, compared to $798m for the same period prior year.
Assets under management (AUM) rose 1% to $3.684 trillion, compared to $3.648 trillion for the same period last year.
The company said that growth in AUM reflected market valuation gains and investment performance as well as the acquisition of Claymore Investments.
BlackRock chairman and CEO Laurence Fink said that during the quarter the company generated 7 percent year-over-year growth in diluted EPS with strong underlying momentum in all asset classes and channels across its global platform.
