Who is Castle Trust Bank owned by?

ASSOCIATED Bank National Association 9 BANK FIRST National Association 3 Bank of Alma 12 BANKFIRST FINANCIAL SVC 5 Cecilian Bank 11 Commercial State Bank of Wagner 3 Community Bank of the South 3 DR Bank 17 FIDELITY Bank 26 Fusion Bank 8 Haskell National Bank 7 HNB National Association National Bank 14 Metamora State Bank 4 PeopleFirst Bank 2 Security Bank of Texas 2 Smackover State Bank 6 South Ottumwa Savings Bank 7 SouthTrust Bank, National Association 4 Twin City Bank 7 ValueBank Texas 6