EXHIBIT 99.4 PRESS RELEASE Date: September 12, 2003 UNITED BANCORP, INC. DECLARES CASH DIVIDEND FOR THIRD QUARTER OF 2003 TECUMSEH -- On September 9, 2003, the board of directors of United Bancorp, Inc., parent company of United Bank & Trust and United Bank & Trust -- Washtenaw, declared a regular third quarter cash dividend of 34 cents per share, payable October 31, 2003, to shareholders of record October 10, 2003. This represents an increase over the 33 cents per share paid in the first and second quarters of 2003. 7