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Hugh Grosvenor's estimated net worth in 2023 is £9.42 billion, making him one of the wealthiest individuals in the United Kingdom. His vast fortune primarily stems from his inheritance of the Grosvenor Group, a property development and investment company founded by his ancestors in the 17th century. The group owns a significant portfolio of properties in London and other major cities worldwide, contributing to Grosvenor's immense wealth.