EX-21 7 a2152688zex-21.htm EX-21
QuickLinks -- Click here to rapidly navigate through this document

Exhibit 21


SUBSIDIARIES OF CONSTELLATION ENERGY GROUP, INC.*

 
  Jurisdiction
of
Incorporation

Baltimore Gas and Electric Company.   Maryland
Constellation Holdings, Inc.   Maryland
Constellation Investments, Inc.   Maryland
Constellation Power, Inc.   Maryland
Constellation Real Estate Group, Inc.   Maryland
Constellation Enterprises, Inc.   Maryland
Constellation Energy Commodities Group, Inc.   Delaware
Constellation Energy Projects & Services Group, Inc.   Delaware
Safe Harbor Water Power Corporation   Pennsylvania
BGE Home Products & Services, Inc.   Maryland
CEG Acquisition, LLC   Delaware
Constellation NewEnergy, Inc   Maryland
Constellation Generation Group, LLC   Maryland
Calvert Cliffs Nuclear Power Plant, Inc.   Maryland
Constellation Nuclear Services, Inc.   Maryland
Constellation Power Source Generation, Inc.   Maryland
Constellation Power Source Holdings, Inc.   Maryland
BGE Capital Trust II   Delaware
Nine Mile Point Nuclear Station, LLC   Delaware
R. E. Ginna Nuclear Power Plant, LLC   Maryland
    *
    The names of certain indirectly owned subsidiaries have been omitted because, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary pursuant to Rule 1-02(w) of Regulation S-X.



QuickLinks

SUBSIDIARIES OF CONSTELLATION ENERGY GROUP, INC.