The Sobratos = $6.6B
John A. Sobrato might be the owner of a big real estate firm, but the credit should go to his mother. After all, she was the person who spent her inheritance pioneering the real estate industry. When her son turned the right age, he ended up launching a real estate business of his own. The result is the company we now know as the Sobrato Organization, which owns office space, residential properties, and land all over the country. His three kids have since used the family wealth the spearhead successful investments of their own. For example, his son is now a part-owner of the San Francisco 49ers.
The Sobratos = $6.6B
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