Who is the billionaire in South Dakota?

Bank of Ocean City 7 BankChampaign, National Association 1 BANKFIRST FINANCIAL SVC 5 Bay Port State Bank 10 COMMERCE Bank 12 Dakota Western Bank 3 Farmers State Bank of Underwood 3 FIRST AMER B&TC 7 FIRST National Association National Bank OF PULASKI 6 First Peoples Bank of Tennessee 1 First State Bank of Campbell Hill 3 Junction National Bank 6 Mountain Valley Bank 6 Peoples State Bank of Velva 1 Pineries Bank 1 Potter State Bank of Potter 4 SOVEREIGN Bank 11 Twin River Bank 4 united bank 21 wells fargo online banking 19