UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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): September 18, 2003 BLACKHAWK BANCORP, INC. ----------------------- (Exact name of registrant as specified in its charter) Wisconsin 0-18599 39-1659424 --------------------- ----------------- ---------- (State or other jurisdiction (Commission File Number) (IRS Employer Number) of incorporation) 400 Broad Street, Beloit, WI 53511 ---------------------------- ----- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (608) 364-8911 -------------- Item 9: Regulation FD Disclosure. Blackhawk Bancorp, Inc. is furnishing herewith, in the press release attached hereto as Exhibit 99.1, certain information contained therein pursuant to Regulation FD. 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 thereunto duly authorized. Date: September 18, 2003 BLACKHAWK BANCORP, INC. /s/Todd J. James -------------------------------- Todd J. James Executive Vice President and CFO (Duly authorized officer of the registrant and principal financial officer) EXHIBIT INDEX TO FORM 8-K OF BLACKHAWK BANCORP, INC. DATED SEPTEMBER 18, 2003 Pursuant to Section 102(d) of Regulation S-T EXHIBIT DESCRIPTION 99.1 Press Release dated September 18, 2003.