Exelon (EXC) 8-K Other Events

Exhibit 99

Summary of ComEd Delivery Services Rate Case Proposal filed with the Illinois Commerce Commission on 8/31/05:

	Proposed			ICC Approved
($ in millions)	2005(1)			2001(2)			Change		%
Revenue Requirement	$	1,895		$	1,579	(4)	$	317		20.0	(5)
Rate Base	$	6,189		$	3,617		$	2,572		71.1
Cost of Capital		8.94	%		8.99	%
Debt / Equity Ratios		46% / 54	%(3)		57% / 43	%
Adjusted Debt Cost		6.50	%		6.95	%
Return on Equity		11.00	%		11.72	%
Operating Expenses	$	1,182		$	1,114		$	68		6.1

(1)	Based on a 2004 actual test year, adjusted for known and measurable 2005 cost changes
(2)	From March 2003 Agreement
(3)	Capital structure at 6/30/05; common equity excludes $2.3 billion related to the purchase accounting step-up in equity from the Unicom/PECO merger (including goodwill)
(4)	2004 revenue level at weather-normalized sales based on the rates approved in March 2003
(5)	The overall bill impact on the average residential customer’s bill would be approximately 6% as the delivery services rate represents about one-third of the average residential customer’s total bill.