The following companies are subsidiares of Huntington Ingalls Industries: Alion Asia Corporation, Alion Holding Corp, Alion Holding Corp., Alion International Corporation, Alion Maritime India Private Limited, Alion Offshore Services Inc., Alion Science and Technology Corporation, Analytical Solutions Inc., Avondale Engineering & Construction Company, Camber Corporation, Commonwealth Technology Innovation LLC, Engineering Solutions - The Columbia Group, Enlighten IT Consulting LLC, Fleet Services Holding Corp., Fulcrum app, G2, GRACAR Corporation, Gray Research Inc., HII (UK) International Holding Company Ltd., HII (US) International Holding Company, HII Defense and Federal Solutions Inc., HII Energy Inc., HII Fleet Support Group LLC, HII Mechanical Inc., HII Nuclear Inc., HII San Diego Shipyard Inc., HII Services Corporation, HII TSD Holding Company, HII Technical Solutions Corporation, HII Technical Solutions Limited, HII Unmanned Systems Inc., Hanford Integrated Infrastructure Services Contractor LLC, Huntington Ingalls Engineering Services Inc., Huntington Ingalls Incorporated, Huntington Ingalls Industries Australia PTY Ltd., Huntington Ingalls Industries Energy and Environmental Services Inc., Huntington Ingalls Industries International Shipbuilding Inc., Huntington Ingalls Industries Risk Management LLC, Huntington Ingalls Unmanned Maritime Systems Inc., Idaho Cleanup Completion Partners LLC, Ingalls Shipbuilding a Division of HII, KHA Defense Solutions PTY LTD, Kostech Inc., MacAuley Brown Inc., NAPS System Corporation, National Tru Solutions LLC, Nationwide Remediation Partners LLC, Newport News Nuclear BWXT-Los Alamos LLC, Newport News Nuclear Inc., Newport News Reactor Services Inc., Newport News Shipbuilding and Dry Dock Company, Pegasus International (UK) LTD, Pegasus International Services Inc., Q.E.D. LLC, Realion Robotics LLC, TITAN II Inc., Tera Research Incorporated, The S.M. Stoller Corporation., Trusted Security Alliance LLC, UPI (EG) LLC, UniversalPegasus International, UniversalPegasus International Trinidad and Tobago Limited, and Veritas Analytics Inc..
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