EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT The following is a list of all subsidiaries of the Registrant. Name Jurisdiction of Incorporation ------------------------------------------------------------------------- SBI Capital Trust Delaware Stillwater National Bank & Trust Company United States Stillwater National Building Corporation* Oklahoma CRK Properties, Inc.* Oklahoma Stillwater Properties, Inc.* Oklahoma Cash Source, Inc.* Oklahoma BNS, Inc.** Oklahoma SWB, Inc. * Oklahoma <FN> * Direct subsidiaries of Stillwater National Bank & Trust Company. ** Direct subsidiary of CRK Properties, Inc. </FN>