Who are the big four in banking?

AMERICAN National Association National Bank&TC 6 Bank of Dawson 5 Bank of Sunset & Trust Company 10 Citizens Bank of Georgia 6 Citizens National Bank of Cheboygan 9 COLUMBIA Bank 13 Dedicated Community Bank 8 Falls City National Bank 4 First Bank of Blue Earth 4 FIRST FED Bank 11 FREMONT Bank 12 Heritage Community Bank 1 Inspire Trust Company, National Association 12 Maquoketa State Bank 4 RCB Bank 14 Rivers Edge Bank 2 SMARTBANK 13 Southeastern Bank 6 State Bank of Burrton 7 Sterling State Bank 18