Unicom Corporation Bank One Plaza P. O. Box A-3005 P [Unicom Logo] Chicago, Illinois 60690-3005 R O --------------------------------------------------------------------- X Y This proxy is solicited on behalf of the Board of Directors of Unicom Corporation for the Annual Meeting of Shareholders to be held on June 28, 2000 The undersigned appoints Pamela B. Strobel and John P.McGarrity, or either of them, as Proxies, each with the power to appoint his or her substitute, and hereby authorizes them to represent and to vote, as designated on the reverse side, all shares of Unicom stock held in the undersigned's name and shares held by agents for the benefit of the undersigned in the Plans hereafter described, subject to the voting direction of the undersigned, at the Annual Meeting of Shareholders to be held on June 28, 2000, or any adjournment hereof and, in the Proxies' discretion, to vote upon such other business as may properly come before the meeting, all as more fully set forth in the Proxy Statement related to the meeting, receipt of which is hereby acknowledged. Your instructions for the election of Directors may be indicated on the other side. The nominees are Brennan, Cantu, Compton, DeMars, Gin, Jannotta, Rogers, Rowe and Thomas. All shares to be voted pursuant to this proxy include shares, if any, held in the name of agents, for the benefit of the undersigned, in the Company's Dividend Reinvestment and Employee Stock Purchase Plans. Change of address: -------------------------------- -------------- PLEASE SEE [Unicom Logo] REVERSE SIDE . FOLD AND DETACH HERE . Unicom Corporation Annual Meeting of Shareholders Wednesday, June 28, 2000 10:30 A.M. The Grand Ballroom of the Hyatt Regency Chicago 151 East Wacker Drive, Chicago, Illinois Your vote is important. Thank you for voting. [X] PLEASE MARK YOUR VOTES AS IN THIS EXAMPLE. THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN. IF NO DIRECTION IS MADE, IT WILL BE VOTED FOR ITEMS 1, 2, 4 AND THE ELECTION OF THE DIRECTOR NOMINEES: Brennan, Cantu, Compton, DeMars, Gin, Jannotta, Rogers, Rowe, and Thomas. - --------------------------------------------------------------------------------------------------------------------------------- 1. Approval of the FOR AGAINST ABSTAIN Merger Agreement [ ] [ ] [ ] 2. Postponement or FOR AGAINST ABSTAIN adjournment of the [ ] [ ] [ ] Annual Meeting 3. Election of Directors (See Reverse) FOR WITHHELD [ ] [ ] For, except vote withheld from the following nominee(s): 4. Appointment of FOR AGAINST ABSTAIN Auditors [ ] [ ] [ ] - --------------------------------------------------------------------------------------------------------------------------------- SIGNATURE(S) DATE The signer hereby revokes all proxies heretofore ------------------------------------------- ----------------- given by the signer to vote at said meeting or any adjournments thereof. NOTE: Please sign exactly as name appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, trustee or guardian, please give full title as such. ----------------------------------------------------- FOLD AND DETACH HERE ONLY IF YOU ARE RETURNING YOUR VOTED PROXY CARD BY MAIL [Unicom Logo] To Our Shareholders: Unicom encourages you to take advantage of new and convenient ways by which you can vote your shares. You can vote your shares through the Internet or the telephone. This eliminates the need to return the proxy card. To vote your shares through the Internet or the telephone you must use the control number printed in the box above, just below the perforation. The series of numbers that appear in the box above is your personal code to access the system. 1. To vote over the Internet: . Log on the Internet and go to the Web site http://www.eproxyvote.com/ucm. ----------------------------- 2. To vote over the telephone: . On a touch-tone telephone call toll-free 1-877-PRX-VOTE (1-877- 779-8683), or from outside the United States call direct 1-201- 536-8073. Your Internet or telephone vote authorizes the named proxies in the same manner as if you marked, signed, dated and returned the proxy card. If you choose to vote your shares through the Internet or the telephone, do not mail back your proxy card. Your vote is important. Thank you for voting.