SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 20, 1998 United Security Bancorporation (Exact Name of Registrant as Specified in Charter) Washington 0-18561 91-1259511 ---------- ------- ---------- (State or other jurisdiction (Commission (IRS Employer Identi- of incorporation) File Number) fication Number) 9506 North Newport Highway, Spokane, Washington 99218- 1200 ----------------------------------------------------- - ----- (Address of principal executive offices/Zip Code) Registrant's telephone number, including area code: (509) 467-6949 --------------------------------------------------------- - ---------- 1 UNITED SECURITY BANCORPORATION Item 2. Acquisition or Disposition of Assets Effective July 20, 1998, United Security Bancorporation, Spokane, Washington (USBN) completed its pending acquisition of Grant National Bank (GNB). The acquisition was accomplished pursuant to an Agreement and Plan of Consolidation dated as of March 24, 1998 (Agreement). The Agreement was included as Exhibit (2) to the Form 8-K filed by USBN dated March 24, 1998. Item 7. Financial Statements and Exhibits (a) Financial statements - the requisite historical financial information was included with the Joint Proxy Statement/ Prospectus dated June 15, 1998, previously filed by USBN as part of its Registration Statement on Form S-4 with the Securities and Exchange Commission. (b) Pro forma financial information - the requisite pro forma financial information was included with the Joint Proxy Statement/Prospectus dated June 15, 1998, previously filed by USBN as part of its Registration Statement on Form S-4 with the Securities and Exchange Commission. (c) Exhibits: (99) Press release issued by USBN dated July 20, 1998 to announce the completion of the acquisition of GNB. SIGNATURES Pursuant to the requirements of the Security Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Dated: July 22, 1998 UNITED SECURITY BANCORPORATION By: /s/ Richard C. Emery ------------------------------ Name: Richard C. Emery Title: President and Chief Executive Officer 2