Blackrock is a majority owner of Blackstone, a publicly traded company. Nothing is sacred anymore, not even your family history.
https://www.bloomberg.com/news/articles/2020-08-05/blackstone-said-to-reach-4-7-billion-deal-to-buy-ancestry-com#xj4y7vzkg
https://finance.yahoo.com/quote/BX/holders?p=BX