How did John Tolleson make his money?

AMERICAN EXPRESS National Association National Bank 23 ANCHORAGE DIGITAL Bank National Association 21 ATLANTIC UNION Bank 12 BANK OF THE ORIENT 9 Bath State Bank 10 Buckley State Bank 10 C3BANK National Association 9 CITIZENS Community FED National Association 11 Federated Bank 4 First Farmers & Merchants Bank 2 First Financial Bank, Winnebago 2 First National Bank in New Bremen 3 First National Bank of Louisburg 1 First Peoples Bank of Tennessee 1 FIRST SECURITY Bank 4 First State Bank of Bigfork 3 Florida Capital Bank, National Association 1 Miami Savings Bank 7 Murphy Bank 11 Security Bank of Southwest Missouri 5