EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT State (Country) of Name under which Subsidiary does Business Incorporation Aspen Investment Alliance, Inc. Colorado Data-Link Systems, LLC Wisconsin FIserv CIR, Inc. Delaware FIserv Federal Systems, Inc. Delaware FIserv Fresno, Inc. California FIserv Joint Venture, Inc. Delaware Fiserv Solutions, Inc. Wisconsin FIserv (Europe) Ltd. United Kingdom FIserv (ASPAC) Pte., Ltd. Singapore Fiserv Australia Pty Limited Australia Pt Fiserv Indonesia Indonesia First Trust Corporation Colorado Information Technology, Inc. Nebraska Lincoln Trust Company Colorado The Affinity Group, Inc. Colorado Fiserv Solutions of Canada Inc. Ontario Fiserv Clearing, Inc. Delaware BHC Investments, Inc. Delaware BHC Trading Corp. Delaware Fiserv Securities, Inc. Delaware TradeStar Investments, Inc. Delaware Fiserv Investor Services, Inc. Delaware BHCM Insurance Agency, Inc. Delaware F.T. Agency, Inc. Ohio Tower Agency, Inc. Ohio Fiserv Insurance Agency of Alabama, Inc. Alabama Fiserv Correspondent Services, Inc. Colorado Investment Consulting Group, Inc. Colorado FCS Funding, Inc. Colorado WUB2 Management Company Colorado WUB3 Capital Management, Inc. Colorado WUB4 Capital Partners, LLP Colorado Life Instructors, Inc. New Jersey Fiserv LeMans, Inc. Pennsylvania Specialty Insurance Service California The Freedom Group, Inc. Iowa Specialty Software Service, Inc. California Fiserv Mercosur, Inc. Delaware 17 State (Country) of Name under which Subsidiary does Business Incorporation Fiserv International (Barbados) Limited Barbados Fiserv Envision Financial Technologies, Inc. Maryland XP Systems Corporation Minnesota Precision Direct, Inc. Washington Fiserv Domestic and Global Clearing & Execution, Inc. Delaware Fiserv Chicago Clearing and Execution Delaware Fiserv e-Finet, Inc. Wisconsin ITI of Nebraska, Inc. Nebraska WUB5 Mezzanine Fund, L.P. Colorado DSS/Spectrum Services Corp. Florida RF/Spectrum Decision Science Corporation Florida 18