Blackrock Ownership Highlights. Blackrock (NYSE:BLK) is owned by 80.27% institutional shareholders and by 1.10% insiders. The rest is owned by the public. The largest institutional owner of Blackrock is "Vanguard Group Inc", owning 8.29% of the company's total share outstanding. The largest mutual fund owner of Blackrock is "Vanguard Total. 2024 dynasty rookie rankings
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