8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

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

July 31, 2006
Date of Report (Date of earliest event reported)

Commission File	Exact Name of Registrant as Specified in Its Charter; State of
Number	Incorporation; Address of Principal Executive Offices; and	IRS Employer
	Telephone Number	Identification 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 9 — Financial Statements and Exhibits
Item 9.01 — Financial Statements and Exhibits

On July 31, 2006, Exelon Corporation (Exelon) announced via press release Exelon’s results for the second quarter ended June 30, 2006. Attached as Exhibit 99 to this Current Report on Form 8-K is the revised 2007 around-the-clock historical forward prices slide that was discussed on the second quarter earnings and merger update conference call. For additional information refer to Exhibits 99.1 and 99.3 included in the previously filed July 31, 2006 Form 8-K. This Form 8-K and the attached exhibit are provided under Item 9.01 of Form 8-K and are furnished to, but not filed with, the Securities and Exchange Commission (SEC).

(c) Exhibits

Exhibit No.	Description
99	Revised 2007 around-the-clock historical forward prices

* * * * *

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 

July 31, 2006

EX-99

Exhibit 99

2007 Around-the-Clock Historical Forward Prices PJM West Hub PJM NI Hub Source: OTC quotes and electronic trading systems. As Exelon becomes a more commodity-driven business, wholesale power price movements will have an increasing impact on corporate earnings. 4/19: $73.94 2/16: $61.56 4/20: $53.49 2/16: $43.80 7/6: $44.50 7/6: $62.18