EXHIBIT 21 LIST OF SUBSIDIARIES WHOLLY OWNED SUBSIDIARIES OF SUPERIOR NATIONAL INSURANCE GROUP, INC. ("SNIG"), A DELAWARE CORPORATION Business Insurance Group, Inc. ("BIG"), a Delaware corporation Superior National Capital Holding Corporation ("SNCHC"), a Nevada corporation Superior National Capital Trust I, a Delaware statutory trust SUPERIOR NATIONAL CAPITAL, L.P., A BERMUDA LIMITED PARTNERSHIP SNIG and SNCHC are the two general partners WHOLLY OWNED SUBSIDIARIES OF BIG Pacific Insurance Brokerage, Inc., a California corporation InfoNet Management Systems, Inc. a California corporation SN Insurance Services, Inc., a California corporation Superior (Bermuda) Ltd., a Bermuda corporation Superior Pacific Casually Company ("SPCC"), a California corporation Superior National Insurance Company ("SNIC"), a California corporation SN Insurance Administrators, Inc., a California corporation California Compensation Insurance Company, a California corporation Combined Benefits Insurance Company, a California corporation Commercial Compensation Insurance Company, a New York corporation WHOLLY OWNED SUBSIDIARY OF SPCC Regional Benefits Insurance Services, Inc., a California corporation WHOLLY OWNED SUBSIDIARY OF SNIC Western Select Service Corp., a California corporation