The Vanguard Group & BlackRock
The Vanguard Group, Inc. is an American registered investment advisor based in Malvern, Pennsylvania, with about $8 trillion in global assets under management, as of January 13, 2021.[3] It is the largest provider of mutual funds and the second-largest provider of exchange-traded funds (ETFs) in the world after BlackRock's iShares.[4] In addition to mutual funds and ETFs, Vanguard offers brokerage services, educational account services, financial planning, asset management, and trust services. Several mutual funds managed by Vanguard are ranked at the top of the list of US mutual funds by assets under management.[5] Along with BlackRock and State Street, Vanguard is considered to be one of the Big Three index fund managers that play a dominant role in corporate America.
https://en.wikipedia.org/wiki/The_Vanguard_GroupBlackRock, Inc. is an American multi-national investment company based in New York City. Founded in 1988, initially as an enterprise risk management and fixed income institutional asset manager, BlackRock is the world's largest asset manager, with US$8.66 trillion in assets under management as of December 31, 2022.[1] BlackRock operates globally with 70 offices in 30 countries, and clients in 100 countries.
BlackRock is the manager of the iShares group of exchange-traded funds, and along with The Vanguard Group and State Street, it is considered to be one of the Big Three index fund managers.
https://en.wikipedia.org/wiki/BlackRock 
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