To: Katherine K. Combs
Vice President and Corporate Secretary, Exelon Corp.. (nee PECO)
2301 Market Street
Philadelphia, Pennsylvania 19101-8699

October 31, 2000

Dear Exelon Corporate Secretary Combs,

I, Robert B. Mills, am an owner of 62 shares of PECO Energy Co. stock (now merged to form Exelon Corp.), verification of which is enclosed. Due to the merger, the exact deadline for stockholder proposals to be submitted is unclear, as Scott Peters and I have discussed. I should say now that I also own 60 shares of Unicom stock (now also Exelon stock). I will maintain ownership of both stocks through the next years meeting.

I hereby notify you of my intention to file the enclosed proposal entitled INVEST IN CLEAN ENERGY (ICE) for consideration at the next annual meeting, and for inclusion in the Company's proxy statement, in accordance with rule 14-a-8 of the General Rules and Regulations of the Securities and Exchange Act of 1934 (as amended).

Please note that my address has changed. Direct dividends, proxy, annual report and other communications to this new address.
Robert B. Mills
1233 12th Street N.W.
Washington DC 20005
(202) 682-4282, and

Cc: Securities and Exchange Commission
Encl: ICE Proposal and copy of stock certificate