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): September 24, 1999 Commission Registrant; State of Incorporation; IRS Employer File Number Address; and Telephone Number Identification No. - ----------- -------------------------------------- ------------------ 1-11375 UNICOM CORPORATION 36-3961038 (an Illinois corporation) 37th Floor, 10 South Dearborn Street Post Office Box A-3005 Chicago, Illinois 60690-3005 312/394-7399 1-1839 COMMONWEALTH EDISON COMPANY 36-0938600 (an Illinois corporation) 37th Floor, 10 South Dearborn Street Post Office Box 767 Chicago, Illinois 60690-0767 312/394-4321 Item 5. Other Events Presentation to Investors regarding Merger Transaction. On September 24, 1999, Unicom Corporation and PECO Energy Company met with investors to discuss the merger of the two companies. A copy of the presentation materials is attached to this Current Report on Form 8-K as Exhibit 99. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. (a) Financial Statements of Business Acquired. Not applicable. (b) Pro Forma Financial Information. Not applicable. (c) Exhibits 99. Presentation to investors, "The Creation of a Preeminent National Energy Company, September 24, 1999." SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized. UNICOM CORPORATION (Registrant) Date: September 27, 1999 By: John C. Bukovski ------------------------------ John C. Bukovski Senior Vice President COMMONWEALTH EDISON COMPANY (Registrant) Date: September 27, 1999 By: John C. Bukovski ------------------------------ John C. Bukovski Senior Vice President EXHIBIT INDEX Exhibit Number Description of Exhibit 1. None 2. None 4. None 16. None 17. None 20. None 23. None 24. None 27. None 99. Presentation to investors, "The Creation of a Preeminent National Energy Company, September 24, 1999."