1 SUBSIDIARIES OF FIRSTAR CORPORATION EXHIBIT 21 - -------------------------------------------------------------------------------- Firstar Corporation has no parents. The following list shows the name of each subsidiary of Firstar and the percentage of ownership as of January 1, 2000. Percentage Jurisdiction in which Name of Subsidiary Ownership Incorporated or Organized ------------------ --------- ------------------------- 1 Firstar Bank, National Association 100% United States 1 Mercantile Bank, National Association 100% United States 1 Mercantile Bank of Kansas City 100% Missouri 1 Mercantile Trust Company, National Association 100% United States 1 Mercantile Bank of Illinois 100% Illinois 1 Mercantile Bank of Arkansas, National Association 100% United States 1 Mercantile Bank of Kentucky 100% Kentucky 1 Firstar Bank U.S.A., National Association 100% United States 1 Mercantile Bank Midwest 100% Kansas 3 Tennessee Capital Corporation 100% Nevada 1 Firstar Mutual Funds LLC 100% Wisconsin 1 Lanadrac 100% Kentucky 1 Firstar Investment Research & Management Company, LLC 100% Wisconsin 1 Firstar Insurance Services, LLC 100% Wisconsin 3 Firstar Investment Services, Inc. 100% Wisconsin 1 Elan Life Insurance Company 79.00% Arizona 1 Firstar Title Corp. 100% Wisconsin 3 Firstar Community Investment Corporation 100% Wisconsin 3 Firstar Lease Receivables LLC 100% Wisconsin 3 Firstar Lease Receivables Corporation 100% Wisconsin 3 Firstar Home Mortgage Corporation 100% Wisconsin 3 First National Cincinnati Corporation 100% Ohio 1 Firstar Finance, Inc 100% Ohio 1 Star Capital Corporation 100% Ohio 1 Miami Valley Insurance Company 100% Arizona 3 Minnesota Capital Corporation 100% Nevada 4 Firstar RE Corp 100% Nevada 3 Firstar Trade Services Corporation 100% Wisconsin 5 Firstar Trade Services Limited 100% Hong Kong 3 Wisconsin Capital Corporation 100% Nevada 1 Firstar Capital Trust I 100% Delaware 1 Star Capital Trust I 100% Delaware 1 Mercantile Capital Trust I 100% Delaware 1 F&H Realty Corp 100% Missouri 1 D.D. Development of Sterling L.P. 100% Illinois 1 Mark Twain Properties 100% Missouri 1 GCT Realty Company 100% Illinois 1 Mississippi Valley Life Insurance Company 100% Arizona 1 Tarquad Corporation 100% Missouri 1 FFG Trust Inc 100% Illinois 1 Mercantile Consumer Loan Company Inc. 100% Illinois 6 Mercantile Leasing Corporation 100% Iowa 6 Midwest Realty Company 100% Iowa 7 Mercantile Financial of Little Rock, LLC 100% Illinois 8 Home Federal Service Corporation 100% Illinois 9 Eastern Missouri Investments LLC 100% Illinois 10 Fidelity Credit Corp. 100% Missouri 2 Mercantile Business Credit Inc. 100% Missouri 2 Mercantile Community Development Corporation 100% Missouri 2 Mississippi Valley Advisors Inc. 100% Missouri 2 Infinet Securities, Inc. 100% Missouri 2 Mercantile Properties, Inc. 100% Missouri 2 Mercantile Mortgage Financial Company 100% Missouri 2 Caltrop Corporation 100% Missouri 2 Sangamon Investment Company 100% Missouri 2 Mercantile Insurance Services, Inc. 100% Missouri 2 Mark Twain St Louis Investment Co. 100% Missouri 2 Mercantile Investment Services, Inc. 100% Missouri 2 United Financial Services 100% Missouri 2 Metropolitan Savings Services Corporation 100% Missouri 2 SoMo Investment Company Inc. 100% Missouri 2 Mercantile Center Associates 100% Missouri 2 Roosevelt Texas Holdings, Inc. 100% Missouri 2 Mercantile Bank International 100% Missouri 2 Anexsys Holdings of Missouri, Inc. 100% Missouri 11 Mercantile Mortgage Realty LLC 100% Illinois 12 Lakewood Oaks Golf, Ltd 100% Missouri 12 Fortune Homes, Inc. 100% Missouri 13 Bruno Stolz LLC 100% Missouri 14 Lending Express, LP 100% Missouri 15 Mercantile Center Redevelopment Corp. 100% Missouri 16 Mercantile Trade Services Ltd. 100% Missouri Notes ----- 1 Subsidiary of Firstar Corporation 2 Subsidiary of Mercantile Bank National Association 3 Subsidiary of Firstar Bank, National Association 4 Subsidiary of Minnesota Capital Corporation 5 Subsidiary of Firstar Trade Services Corporation 6 Subsidiary of Mercantile Bank Midwest 7 Subsidiary of Mercantile Bank of Arkansas N.A. 8 Subsidiary of Mercantile Bank of Illinois 9 Subsidiary of Mercantile Bank 10 Subsidiary of Mercantile Bank of Kentucky 11 Subsidiary of Mercantile Mortgage Financial Company 12 Subsidiary of Caltrop Corporation 13 Subsidiary of Mercantile Investment Services, Inc. 14 Subsidiary of Metropolitan Services Corporation 15 Subsidiary of Mercantile Center Associates 16 Subsidiary of Mercantile Bank International