Is BlackRock the biggest fund in the world?

Could you clarify if BlackRock is indeed the largest fund globally? As far as my understanding goes, they manage an immense portfolio of assets, but I'm curious to know if there's any other fund that might rival or surpass their scale. It's always interesting to stay updated on the ever-evolving landscape of finance, especially in the realm of asset management. So, is BlackRock unchallenged in their position as the largest fund worldwide?