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

September 12, 2005
Date of Report (Date of earliest event reported)

Commission File	Exact Name of Registrant as Specified in Its Charter; State of Incorporation;	IRS Employer
Number	Address of Principal Executive Offices; and Telephone Number	Identification Number
1-16169	EXELON CORPORATION (a Pennsylvania corporation) 10 South Dearborn Street – 37th Floor P.O. Box 805379 Chicago, Illinois 60680-5379 (312) 394-7398	23-2990190
1-1839	COMMONWEALTH EDISON COMPANY (an Illinois corporation) 10 South Dearborn Street – 37th Floor P.O. Box 805379 Chicago, Illinois 60680-5379 (312) 394-4321	36-0938600
1-1401	PECO ENERGY COMPANY (a Pennsylvania corporation) P.O. Box 8699 2301 Market Street Philadelphia, Pennsylvania 19101-8699 (215) 841-4000	23-0970240
333-85496	EXELON GENERATION COMPANY, LLC (a Pennsylvania limited liability company) 300 Exelon Way Kennett Square, Pennsylvania 19348 (610) 765-6900	23-3064219

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 8 – Other Events.
Item 8.01. Other Events.

As previously announced, on December 20, 2004, Exelon Corporation (Exelon) and Public Service Enterprise Group Incorporated (PSEG) entered into an Agreement and Plan of Merger (the Merger Agreement), pursuant to which PSEG will merge with and into Exelon with Exelon continuing as the surviving corporation (the Merger). There are a number of regulatory approvals or other regulatory actions required to consummate the Merger, including those described in previous Reports on Form 8-K.

On September 13, 2005, Exelon issued a press release announcing that PECO Energy Company (PECO) had reached a settlement related to Pennsylvania review of the Exelon-PSEG merger (the Settlement). A copy of the press release is attached to this Report on Form 8-K as Exhibit 99.

On September 12, 2005, the administrative law judge in the proceeding before the Pennsylvania Public Utility Commission (PAPUC) issued a seventh prehearing order establishing a modified timetable for the regulatory approval process in Pennsylvania. The modified timetable permits parties to comment on the Settlement and unresolved issues under the Settlement. The modified timetable accelerates the schedule for hearings and briefs by approximately three weeks. Accordingly, it is anticipated that the administrative law judge may issue an initial decision earlier than the previously expected date of mid-December 2005. The full PAPUC will vote on the case possibly before the end of 2005.

Although Exelon and PSEG believe that the expectations as to timing for the Pennsylvania proceeding described above are reasonable, no assurances can be given as to the timing of the receipt of any required regulatory approvals or that all required approvals will be received.

* * * * *

This combined Form 8-K is being furnished separately by Exelon, Commonwealth Edison Company (ComEd), 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.

Forward-Looking Statements

This report includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, which are subject to risks and uncertainties. The factors that could cause actual results to differ materially from these forward-looking statements include risks associated with the proposed merger of Exelon and PSEG that are included in the joint proxy statement/prospectus that Exelon filed with the SEC pursuant to Rule 424(b)(3) on June 3, 2005 (Registration No. 333-122704). Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. The Registrants do not undertake any obligation to publicly release any revision to the 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
COMMONWEALTH EDISON COMPANY
PECO ENERGY COMPANY
EXELON GENERATION COMPANY, LLC
 

/s/ J. Barry Mitchell  

J. Barry Mitchell 

Senior Vice President, Chief Financial Officer
and Treasurer 

September 14, 2005