=============================================================================== UNITED STATES 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): APRIL 18, 2003 SOUTHWEST BANCORPORATION OF TEXAS, INC. (Exact name of registrant as specified in charter) TEXAS 000-22007 76-0519693 (State of Incorporation) (Commission File No.) (I.R.S. Employer Identification No.) 4400 POST OAK PARKWAY HOUSTON, TEXAS 77027 (Address of Principal Executive Offices) (Zip Code) (713) 235-8800 (Registrant's Telephone Number, Including Area Code) =============================================================================== ITEM 5. OTHER EVENTS. On April 18, 2003 Southwest Bancorporation of Texas, Inc. (the "Company") received notice regarding a blackout period, as defined in Rule 100 of Regulation BTR. The notice required by Rule 104 of Regulation BTR was provided to directors and executive officers by the Company on April 18, and is attached hereto as Exhibit 99.1. The foregoing description is qualified by reference to such exhibit. The information contained in this report is being furnished pursuant to Item 11 under Item 5 of Form 8-K. ITEM 7 (C). EXHIBITS. Exhibit 99.1 Notice to Directors and Executive Officers dated April 18, 2003. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. SOUTHWEST BANCORPORATION OF TEXAS, INC. Dated: May 6, 2003 By: /s/ JOHN MCWHORTER ----------------------------------------- R. John McWhorter Senior Vice President and Controller 3 INDEX TO EXHIBITS Exhibit Description ------- ----------- 99.1 Notice to Directors and Executive Officers dated April 18, 2003. 4