Exhibit 21 Subsidiaries of Hallmark Financial Services, Inc. ------------------------------------------------- Name of Subsidiary* State of Incorporation ------------------- ---------------------- American Hallmark Insurance Company of Texas Texas Hallmark Finance Corporation Texas ACO Holdings, Inc. Texas Hallmark Claims Service, Inc. Texas American Hallmark General Agency, Inc. Texas Hallmark Underwriters, Inc. Texas American Hallmark Agencies, Inc. Texas Allrisk Insurance Agency, Inc. Texas Phoenix Indemnity Insurance Company Arizona Hallmark General Agency, Inc. Texas Effective Claims Management, Inc. Texas * All subsidiaries conduct business under their corporate name.