BlackRock is substantially larger than PIMCO when measured by total assets under management across the entire corporate enterprise. While PIMCO is a global fixed-income investment management powerhouse managing well over two trillion dollars in assets, BlackRock stands as the world's largest asset manager, overseeing massive multi-asset portfolios scaling into tens of trillions of dollars globally through its comprehensive suite of iShares exchange-traded funds, institutional mandates, and Aladdin technology platforms.