Who is the guy who owns BlackRock?

Could you please enlighten me on the identity of the individual who holds the reins of BlackRock? I'm quite curious to know who this person is, given the significant influence and power that BlackRock wields in the world of finance and investment. Could you possibly provide a brief overview of his background and qualifications, as well as any notable achievements or contributions he has made to the company? It would be fascinating to learn more about this mysterious figure who stands at the helm of such a preeminent organization.