Black Rock's 15% ownership of Fox Corporation quick reference
NASDAQ article (2023-02-01): https://www.nasdaq.com/articles/blackrock-increases-position-in-fox-corporation-foxa
Black Rock's 13G filing stating their ownership: https://fintel.io/doc/sec-blackrock-inc-1754301-sc-13ga-2023-february-01-19389-4250 See section "Item 4. Ownership"