EXHIBIT 21 AMBASE CORPORATION SUBSIDIARY LISTING AS OF DECEMBER 31, 2002 Jurisdiction Percentage Voting In Which Securities Owned By Name Organized Immediate Parent ==================================================== ============================== ================================ AmBase Corporation Delaware N/A Carteret Bancorp, Inc. Delaware 100% Home Capital Services, Inc. Delaware 100% Maiden Lane Associates, Ltd. Delaware 100% SDG Financial Corp. Delaware 100% Note: Interrelationships shown by indentation with 100% ownership unless otherwise indicated.