6. John A. Sobrato
Net Worth: $5.9 billion
Forbes 400 position: 83
With more than more than 110 commercial buildings and more than 30 apartment complexes under his hat, John Sobrato owns a large chunk of Silicon Valley. His mother, who immigrated to the United States without even knowing the language, has started investing in real estate after she sold the family restaurant. By focusing on Silicon Valley, she has set a foundation for Sobrato family wealth, which John expanded on.
