Filed Pursuant to Rule 433
Registration Statement No. 333-133966
Dated August 21, 2006
| Issuer: | Commonwealth Edison Company | |
| Ratings: | Baa2 (Negative Outlook) (Moody’s); A- (CreditWatch with Negative Implications) (S&P) BBB+ (Negative Outlook) (Fitch) | |
| Principal Amount: | $300,000,000 | |
| Title of Securities: | First Mortgage 5.95% Bonds, Series 104, due 2016 | |
| Legal Format: | SEC-Registered (Registration No. 333-133966) | |
| Settlement Date: | August 28, 2006 | |
| Maturity Date: | August 15, 2016 | |
| Issue Price: | 99.862% of principal amount, plus accrued interest, if any, from August 28, 2006 | |
| Coupon: | 5.95% | |
| Benchmark Treasury: | 4.875% due August 15, 2016 | |
| Spread to Benchmark: | +115 basis points (1.15%) | |
| Treasury Yield: | 4.819% | |
| Yield: | 5.969% | |
| Interest Payment Dates: | Semi-annually on February 15 and August 15, commencing on February 15, 2007 | |
Redemption Provisions: Make-whole call: | At any time at a discount rate of Treasury rate plus 20 basis points | |
| CUSIP: | 202795 HN3 | |
| Joint Book-Running | ||
| Managers: | Citigroup Global Markets Inc. Credit Suisse Securities (USA) LLC Wachovia Capital Markets, LLC | |
| Co-Managers: | Deutsche Bank Securities Inc. Dresdner Kleinwort Wasserstein Securities LLC LaSalle Financial Services, Inc. | |
The issuer has filed a registration statement (including a prospectus) with the U.S. Securities and Exchange Commission (SEC) for this offering. Before you invest, you should read the prospectus for this offering in that registration statement, and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by searching the SEC online database (EDGAR®) atwww.sec.gov. Alternatively, you may obtain a copy of the prospectus from Citigroup Global Markets Inc. by calling 1-877-858-5407, Credit Suisse Securities (USA) LLC by calling 1-800-221-1037, or Wachovia Capital Markets, LLC by calling 1-800-326-5897.
