8-K/A

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K/A

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

September 6, 2006
Date of Report (Date of earliest event reported)

Commission File	Exact Name of Registrant as Specified in Its Charter; State of	IRS Employer
Number	Incorporation; Address of Principal Executive Offices;	Identification Number
	and Telephone Number
1-16169	EXELON CORPORATION	23-2990190
	(a Pennsylvania corporation)
	10 South Dearborn Street — 37th Floor
	P.O. Box 805379
	Chicago, Illinois 60680-5379
	(312) 394-7398
1-1839	COMMONWEALTH EDISON COMPANY	36-0938600
	(an Illinois corporation)
	440 South LaSalle Street
	Chicago, Illinois 60605-1028
	(312) 394-4321
000-16844	PECO ENERGY COMPANY	23-0970240
	(a Pennsylvania corporation)
	P.O. Box 8699
	2301 Market Street
	Philadelphia, Pennsylvania 19101-8699
	(215) 841-4000
333-85496	EXELON GENERATION COMPANY, LLC	23-3064219
	(a Pennsylvania limited liability company)
	300 Exelon Way
	Kennett Square, Pennsylvania 19348
	(610) 765-6900

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 7 — Regulation FD
Item 7.01. Regulation FD Disclosure

On September 6, 2006, Exelon Corporation (Exelon) announced via Form 8-K that it will participate in the Lehman Brothers 2006 CEO Energy/Power Conference in New York City. Attached as Exhibit 99 to this Current Report on Form 8-K/A are the revised Meeting Our Financial and Operating Commitments slide and the revised Exelon’s EPS Drivers: 2004-2007 slide to be used in the presentation. On slide 15 we previously presented year-to-date June 30, 2006 earnings per share weather normalized as $1.56. The correct amount is $1.54. As a result, as shown on revised slides 15 and 28, the unfavorable earnings per share impact in 2006 is $0.06. For additional information refer to Exhibit 99 included in the previously filed September 6, 2006 Form 8-K.

* * * * *

This combined Form 8-K is being furnished separately by Exelon, Commonwealth Edison Company (ComEd), PECO Energy Company (PECO) and Exelon Generation Company, LLC (Generation) (Registrants). Information contained herein relating to any individual registrant has been furnished by such registrant on its own behalf. No registrant makes any representation as to information relating to any other registrant.

Except for the historical information contained herein, certain of the matters discussed in this Report are forward-looking statements, within the meaning of the Private Securities Litigation Reform Act of 1995, that are subject to risks and uncertainties. The factors that could cause actual results to differ materially from the forward-looking statements made by a registrant include those factors discussed herein, as well as the items discussed in (a) the Registrants’ 2005 Annual Report on Form 10-K—ITEM 1A. Risk Factors, (b) the Registrants’ 2005 Annual Report on Form 10-K—ITEM 8. Financial Statements and Supplementary Data: Exelon—Note 20, ComEd—Note 17, PECO—Note 15 and Generation—Note 17, and (c) other factors discussed in filings with the SEC by the Registrants. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this Report. None of the Registrants undertakes any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this Report.

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 hereunto duly authorized.

EXELON CORPORATION
PECO ENERGY COMPANY
EXELON GENERATION COMPANY, LLC
 

/s/ John F. Young  

John F. Young 

Executive Vice President, Finance and Markets, and Chief Financial Officer
Exelon Corporation 

COMMONWEALTH EDISON COMPANY
 

/s/ Robert K. McDonald  

Robert K. McDonald 

Senior Vice President, Chief Financial Officer, Treasurer and Chief Risk Officer
Commonwealth Edison Company 

September 6, 2006

EX-99

Exhibit 99

Note: See presentation appendix for reconciliation of adjusted (non-GAAP) operating EPS to GAAP EPS Meeting Our Financial and Operating Commitments 6/1/2006 6/1/2005 1.48 1.42 $1.48 $1.42 Jun-05 Jun-06 $1.40* $1.54* * Excludes $0.02/share favorable impact versus normal in 2005 and $0.06/share unfavorable impact versus normal in 2006, based on Exelon models First Half 2006 Highlights: ICC approved IL auction - proceeding as planned ICC order in ComEd rate case Higher generation margins Strong nuclear and fossil fleet performance Successful energy delivery system performance with record heat and new peaks Higher O&M expenses and capital expenditures Year-to-date Results:

2004A 2005A 2006 Estimate 2007 East 2.78 3.09 3 0.24 $2.78 $3.10 $3.00-$3.30* + Generation Margins + Weather + Load Growth - - Other Exelon's EPS Drivers: 2004 - 2007 + Generation Margins + Load Growth - - Weather - - Higher O&M + End of Illinois Transition Period + PECO Generation Rate + Load Growth - Inflation * Weather normalized: 2004 - excludes $0.11/share unfavorable impact vs. normal; 2005 - excludes $0.12/share favorable impact vs. normal; 2006E - excludes $0.06/share unfavorable impact vs. normal Note: See presentation appendix for adjusted (non-GAAP) operating EPS reconciliations to GAAP 2005 Guidance: $3.00 - $3.15 Strong earnings growth is continuing in 2006 and will accelerate in 2007 Adjusted (non-GAAP) operating EPS Guidance $2.89* $2.98*