EXHIBIT 21 SUBSIDIARIES OF FIRST NATIONAL OF NEBRASKA. INC. State or Other Jurisdiction of Name Incorporation or Organization 1. First National Bank of Omaha United States (pursuant to the National Bank Act) 2. First National Credit Corporation Nebraska 3. First National Bank South Dakota United States (pursuant to the National Bank Act) 4. MCV Acceptance Corporation Nebraska 5. Credit Card Finance Corporation Nebraska 6. Data Management Products, Inc. Nebraska 7. First National Bank and Trust Company of United States (pursuant to the Columbus National Bank Act) 8. First National Bank (doing business as United States (pursuant to the First National Bank of Alliance-Chadron- National Bank Act) Gering-North Platte-Scottsbluff) 9. Collection Corporation of America Nebraska 10. Platte Valley State Bank & Trust Company Nebraska (state-chartered bank) 11. The Fremont National Bank and Trust Company United States (pursuant to the National Bank Act) 12. First National Services Corporation Nebraska 13. First National Bank of Kansas United States (pursuant to the National Bank Act) 14. First National of Colorado, Inc. Delaware 15. Platte Valley Finance Company Nebraska 16. First Technology Solutions, Inc. Nebraska SUBSIDIARIES OF FIRST NATIONAL BANK OF OMAHA State or Other Jurisdiction of Name Incorporation or Organization 1. First of Omaha Service Corporation Nebraska 2. EFC, Inc. Nebraska 3. SPC, Inc. Nebraska 4. RPSI, Inc. Nebraska 5. FIS, Inc. Nebraska SUBSIDIARIES OF FIRST NATIONAL OF COLORADO, INC. State or Other Jurisdiction of Name Incorporation or Organization 1. First National Bank (Fort Collins, Colorado) United States (pursuant to the National Bank Act) 2. Union Colony Bank (Greeley, Colorado) Colorado (state-chartered bank) 3. The Bank of Boulder Colorado (state-chartered bank) 4. Professional Career Services, Inc. Colorado 5. FNC Trust Group, National Association United States (pursuant to the National Bank Act)