Exelon (EXC) 8-K/A Regulation FD Disclosure

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*