UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES AND EXCHANGE ACT OF 1934 Commission file number 001-16189 Date of Report (Date of earliest event reported): October 6, 2003 NISOURCE INC. (Exact Name of Registrant as Specified in its Charter) Delaware 001-16189 35-2108964 -------- --------- ---------- (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.) 801 East 86th Avenue, Merrillville, Indiana 46410 ------------------------------------------- ----- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (877) 647-5990 NiSource Inc. Current Report of Form 8-K ITEM 5. OTHER EVENTS This Current Report on Form 8-K is to reflect the presentation of Columbia Energy Resources, Inc. and the steel-industry-related, inside-the-fence project entities of Primary Energy, Inc. as discontinued operations. The changes affect the financial statements and related notes including Schedules I and II, management's discussion and analysis, and the selected financial data as reported in our 8-K filed July 15, 2003 regarding our Annual Report on Form 10-K/A for the fiscal year ended December 31, 2002. Exhibit 99.1 contains information identical to the corresponding sections of the registrants' 8-K filed July 15, 2003 regarding the Annual Report on Form 10-K/A for the fiscal year ended December 31, 2002, except that all such information has been updated to the extent required to reflect Columbia Energy Resources, Inc. and the steel-industry-related, inside-the-fence project entities of Primary Energy, Inc. as discontinued operations. As a result of the Columbia Energy Resources, Inc. being classified as discontinued operations, NiSource no longer reports the Exploration and Production segment. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (a) Exhibits. Exhibit Number 99.1 Items 6, 7 and 8 updated from the NiSource Inc. Annual Report on Form 10-K/A for the year ended December 31, 2002. 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 hereunto duly authorized. Dated: October 6, 2003 Nisource Inc. By: /s/ Jeffrey W. Grossman ------------------------------- Name: Jeffrey W. Grossman Title: Vice President and Controller 2