Exhibit (21) 	 LIST OF SUBSIDIARIES OF THE HARTFORD STEAM BOILER 		 INSPECTION AND INSURANCE COMPANY 					STATE/JURISDICTION OF NAME OF COMPANY INCORPORATION/FORMATION The Allen Insurance Company Bermuda ATOS (30% owned by Radian Corporation and 70% owned by French interests) France The Boiler Inspection and Insurance Company of Canada Canada Corporacion Radian, S.A. de C.V. Mexico EIG Co. Delaware Engineering Insurance Company Limited England Environment, Transport & Planning, S.L. (28% owned by Radian Corporation and 72% owned by Environment, Planning & Transport, S.L.) Spain The Hartford Steam Boiler Inspection and Insurance Company of Connecticut Connecticut The Hartford Steam Boiler Inspection and Insurance Company of Texas Texas Hartford Steam Boiler Inspection Technologies California Hartford Steam Boiler International GmbH Lingen, Germany Hartford Steam Boiler (Singapore) PTE Ltd. Singapore Health & Environmental Management, Inc. (wholly-owned by Radian Corporation) South Carolina HSB Associates, Inc. New York HSB Club, Inc. Connecticut HSB Investment Corporation Connecticut HSB Professional Loss Control, Inc. Tennessee HSB Reliability Technologies Corp. Florida Hemisphere Consulting Corp. (wholly-owned by HSB Reliability Technologies Corp.) Florida LWA-Urban Transportation & Utilities, Inc. (wholly-owned by Radian Corporation) Georgia One State Street Intermediaries (wholly-owned by HSB Associates, Inc.) Connecticut The Polytechnic Club, Inc. Connecticut Radecca, Inc. (wholly-owned by Radian Corporation) Texas Radian Australia Pty. Ltd. (wholly-owned by Radian Corporation) Australia Radian Canada, Inc. (wholly-owned by Radian Corporation) Canada Radian Ceramic Development Corp. (wholly-owned by Radian Corporation) Texas Radian Corporation Texas Radian D-Tech Inc. (wholly-owned by Radian Corporation) California Radian Engineering, Inc. (wholly-owned by Radian Corporation) New York Radian (HK) Limited (wholly-owned by Radian Corporation) Hong Kong Radian Limited (wholly-owned by Radian Corporation) England Radian Systems Corp. (wholly-owned by Radian Corporation) Texas Ra-Hart Investment Company Texas Roper Environmental Engineering, Inc. (wholly-owned by Radian Corporation) Canada Tesam Hartley (25% owned by Radian Corporation, 37.5% owned by Hartley y Cia Ltda. and 37.5% owned by Inversiones Winkel, S.A. Chile