================================================================================ 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): December 12, 2003 SEMCO ENERGY, INC. (Exact Name of Registrant as Specified in Charter) - -------------------------------------------------------------------------------- MICHIGAN 001-15565 38-2144267 (State or Other Jurisdiction (Commission (IRS Employer of Incorporation) File Number) Identification No.) - -------------------------------------------------------------------------------- 28470 13 MILE ROAD, STE. 300 FARMINGTON HILLS, MICHIGAN 48334 (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (248) 702-6000 -------------- - -------------------------------------------------------------------------------- N/A - -------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) ================================================================================ <Page> ITEM 5. OTHER EVENTS AND REQUIRED FD DISCLOSURE. On December 12, 2003, SEMCO Energy, Inc. issued the attached press release, which announced the private placement of $50 million in aggregate principal amount of its 7 3/4% senior unsecured notes due 2013. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (c) Exhibits EXHIBIT DESCRIPTION ------- ----------- 99.1 Press Release issued December 12, 2003. 2 <Page> SIGNATURE 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. SEMCO Energy, Inc. (Registrant) Dated: December 12, 2003 By: /s/ John E. Schneider ------------------------------------------- Name: John E. Schneider Title: Senior Vice President, Treasurer and C.F.O. <Page> EXHIBIT INDEX Form 8-K November 12, 2003 FILED ----- EXHIBIT NO. DESCRIPTION HEREWITH BY REFERENCE - ----------- ----------- -------- ------------ 99.1 Press Release issued X December 12, 2003