If you need assistance with lost or stolen stock certificates, dividend payments, name changes, address changes, stock transfers, stock re-registrations, the Shareholder Investment Plan or other shareholder related matters you may contact:

American Stock Transfer & Trust Company
Attn: Shareholder Services
59 Maiden Lane
New York, NY 10038

Telephone and IVR service: 1-800-258-0499
Calls are answered Monday through Thursday from 8:00 a.m. to 7:00 p.m., and on Friday from 8:00 a.m. to 5:00 p.m., eastern time. The IVR system is available 24 hours a day, 7 days a week.

Web site: www.amstock.com

Transfer Agent and Registrar

American Stock Transfer & Trust Company is the sole stock transfer agent and registrar for:

1. all issues of Constellation Energy Group stock, and
2. the preference stock issues of Baltimore Gas and Electric Company.

Stock transfer requests forwarded in the U.S. Mail, by overnight or in person:

American Stock Transfer & Trust Company
Attn: Shareholder Services
59 Maiden Lane
New York, NY 10038

To avoid possible loss of your stock certificates, we recommend you use registered mail, return receipt requested. Replacing lost stock certificates may require you to purchase a surety bond that costs about 2% of the value of the lost shares.