THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Constellation Energy Group, Inc. (CEG)

4/13/2005 Proxy Information

James R. Curtiss, a director of Constellation Energy, is a partner in the law firm of Winston & Strawn. A subsidiary of Constellation Energy paid fees to this firm for legal services rendered in 2004, and expects to pay fees for legal services in 2005.

4/12/2004 Proxy Information

Edward A. Crooke previously served as Vice Chairman of Constellation Energy and Baltimore Gas and Electric Company from October 2000 until December 2001 and as Vice Chairman of Constellation Energy from April 1999 until January 2000. Mr. Crooke also served as President and Chief Operating Officer of Baltimore Gas and Electric Company from 1992 to 1998 and Vice Chairman from 1998 to 1999. Prior to January 2000, he also served as Chairman, President and Chief Executive Officer of Constellation Enterprises, Inc., the parent company of many of Constellation Energy's unregulated subsidiaries, and also had served as Chairman of each of Constellation Enterprises, Inc.'s direct subsidiaries.

James R. Curtiss, a director of Constellation Energy, is a partner in the law firm of Winston & Strawn. A subsidiary of Constellation Energy paid fees to this firm for legal services rendered in 2003.

Thomas F. Brady, an Executive Vice President of Constellation Energy, also serves as a trustee of Corporate Office Properties Trust (COPT). Constellation Energy sold certain real estate holdings to COPT in 2003 for an aggregate price of approximately $30 million. The real estate sales were made on an armÕs length basis.

3/21/2003 Proxy Information

James R. Curtiss, a director of Constellation Energy, is a partner in the law firm of Winston & Strawn. A subsidiary of Constellation Energy paid fees to this firm for legal services rendered in 2002.

Thomas F. Brady, a Senior Vice President of Constellation Energy, also serves as a trustee of Corporate Office Properties Trust (COPT). Constellation Energy sold certain real estate holdings to COPT in 2002 for an aggregate price of less than $5 million. Constellation Energy has sold, and anticipates selling, additional real estate holdings to COPT in 2003 for an aggregate price of less than $35 million. The real estate sales were made, and future sales will be made, on an armÕs length basis.

Christian H. Poindexter, a former director and Chairman of the Board of Constellation Energy, serves on the compensation committee of the Board of Directors of Mercantile Bankshares Corporation and its subsidiary, Mercantile-Safe Deposit and Trust Company. Edward J. Kelly, III, a director of Constellation Energy, is Chairman of the Board, President and Chief Executive Officer of Mercantile Bankshares Corporation and Chairman of the Board and Chief Executive Officer of Mercantile-Safe Deposit and Trust Company, and serves on the Committee on Management of the Board of Directors of Constellation Energy.