Exhibit (21) NORTHERN TRUST CORPORATION SUBSIDIARIES AS OF MARCH 1, 2000 Percent Jurisdiction of Owned Incorporation ------- --------------- The Northern Trust Company 100% Illinois Norlease, Inc. 100% Delaware TNT-NL Leasing I, Inc. 100% Delaware MFC Company, Inc. 100% Delaware The Northern Trust Company, Canada 100% Ontario, Canada Nortrust Nominees Ltd. 100% London The Northern Trust Company U.K. Pension Plan Limited 100% London The Northern Trust International Banking Corporation 100% Edge Act The Northern Trust Company of Hong Kong Limited 100% Hong Kong Northern Trust Trade Services Limited 100% Hong Kong Northern Trust Fund Managers (Ireland) Limited 100% Ireland Northern Trust Global Investments (Europe) Ltd. 100% London NTG Services LLC 100% Delaware LLC NT Mortgage Holdings LLC 99.6% Delaware LLC Northern Trust of Florida Corporation 100% Florida Northern Trust Cayman International, Ltd. 100% Cayman Islands, BWI Northern Trust Bank of Florida N.A. 100% National Bank Realnor Properties, Inc. 100% Florida Realnor Special Properties, Inc. 100% Florida Realnor 1177, Inc. 100% Florida Realnor Hallandale, Inc. 100% Florida Nortrust of Arizona Holding Corporation 100% Arizona Northern Trust Bank of Arizona N.A. 100% National Bank Northern Trust of California Corporation 100% Delaware Northern Trust Bank of California N.A. 100% National Bank Berry, Hartell, Evers & Osborne, Inc. 100% Delaware, (INACTIVE) Metroplex Bancshares, Inc. 100% Texas Metroplex Delaware Financial Corporation 100% Delaware Northern Trust Bank of Texas N.A. 16.2% National Bank Fiduciary Services Inc. 100% Texas NORTHERN TRUST CORPORATION SUBSIDIARIES AS OF MARCH 1, 2000 (continued) Percent State of Owned Incorporation ------- ------------- Northern Trust of Texas Corporation 100% Texas Northern Trust Bank of Texas N.A. 83.8% National Bank Northern Futures Corporation 100% Delaware, (INACTIVE) Northern Trust of Colorado Corporation 100% Delaware Northern Trust Bank of Colorado 100% Colorado Northern Trust Bank, FSB - Michigan 100% Federal Thrift Northern Trust Holdings L.L.C. 100% Delaware Northern Investment Corporation 100% Delaware Northern Investment Management Company 100% Delaware (INACTIVE) Northern Trust Securities, Inc. 100% Delaware Northern Trust Services, Inc. 100% Illinois Nortrust Realty Management, Inc. 100% Illinois The Northern Trust Company of New York 100% New York Northern Trust Retirement Consulting, L.L.C. 100% Delaware Northern Trust Global Advisors, Inc. 100% Delaware NT Global Advisors, Inc. 100% Ontario, Canada Northern Trust Global Advisors, Limited 100% England The Northern Trust Company of Connecticut 100% Connecticut NT Fund Advisors of Quebec, Inc. 100% Quebec, Canada Northern Trust Quantitative Advisors, Inc. 100% Illinois NTC Capital I 100% Delaware NTC Capital II 100% Delaware