| Form: | S-4 |
| CIK: | 0001501585 | | Company Name: | HUNTINGTON INGALLS INDUSTRIES, INC. | | File Number: | 333-250004 | |
| CIK: | 0001828917 | | Company Name: | Fulcrum IT Services, LLC | | File Number: | 333-250004-30 | |
| CIK: | 0001536679 | | Company Name: | Fleet Services Holding Corp. | | File Number: | 333-250004-29 | |
| CIK: | 0001828898 | | Company Name: | G2, Inc. | | File Number: | 333-250004-28 | |
| CIK: | 0001536774 | | Company Name: | HII Energy Inc. | | File Number: | 333-250004-27 | |
| CIK: | 0001536680 | | Company Name: | HII Fleet Support Group LLC | | File Number: | 333-250004-26 | |
| CIK: | 0001536775 | | Company Name: | HII Mechanical Inc. | | File Number: | 333-250004-25 | |
| CIK: | 0001738755 | | Company Name: | HII Mission Driven Innovative Government Solutions Inc. | | File Number: | 333-250004-24 | |
| CIK: | 0001738753 | | Company Name: | HII TSD Holding Co | | File Number: | 333-250004-23 | |
| CIK: | 0001738746 | | Company Name: | HII Defense & Federal Solutions, Inc. | | File Number: | 333-250004-22 | |
| CIK: | 0001738748 | | Company Name: | HII Mission Driven Innovative Technical Services LLC | | File Number: | 333-250004-21 | |
| CIK: | 0001738727 | | Company Name: | HII Nuclear Inc. | | File Number: | 333-250004-20 | |
| CIK: | 0001536846 | | Company Name: | HII San Diego Shipyard Inc. | | File Number: | 333-250004-19 | |
| CIK: | 0001738768 | | Company Name: | HII Services Corp | | File Number: | 333-250004-18 | |
| CIK: | 0001738732 | | Company Name: | HII Technical Solutions Corp | | File Number: | 333-250004-17 | |
| CIK: | 0001738731 | | Company Name: | HII Unmanned Maritime Systems, Inc. | | File Number: | 333-250004-16 | |
| CIK: | 0001738767 | | Company Name: | Huntington Ingalls Engineering Services, Inc. | | File Number: | 333-250004-15 | |
| CIK: | 0001738766 | | Company Name: | Huntington Ingalls Industries Energy & Environmental Services, Inc. | | File Number: | 333-250004-14 | |
| CIK: | 0001738769 | | Company Name: | Huntington Ingalls Unmanned Maritime Systems, Inc. | | File Number: | 333-250004-13 | |
| CIK: | 0001828896 | | Company Name: | Hydroid, Inc. | | File Number: | 333-250004-12 | |
| CIK: | 0001738888 | | Company Name: | Integrated Information Technology Corp | | File Number: | 333-250004-11 | |
| CIK: | 0001536776 | | Company Name: | Newport News Nuclear Inc. | | File Number: | 333-250004-10 | |
| CIK: | 0001738737 | | Company Name: | Pegasus International, Inc. | | File Number: | 333-250004-09 | |
| CIK: | 0001828925 | | Company Name: | PTR Group, LLC | | File Number: | 333-250004-08 | |
| CIK: | 0001738743 | | Company Name: | Universal Ensco, Inc. | | File Number: | 333-250004-07 | |
| CIK: | 0001559816 | | Company Name: | UniversalPegasus International Holdings, Inc. | | File Number: | 333-250004-06 | |
| CIK: | 0001468243 | | Company Name: | UniversalPegasus International, Inc. | | File Number: | 333-250004-05 | |
| CIK: | 0001738642 | | Company Name: | UP International, Inc. | | File Number: | 333-250004-04 | |
| CIK: | 0001738641 | | Company Name: | UP Support Services, Inc. | | File Number: | 333-250004-03 | |
| CIK: | 0001738742 | | Company Name: | Veritas Analytics, Inc. | | File Number: | 333-250004-02 | |
| CIK: | 0001536678 | | Company Name: | Huntington Ingalls Inc | | File Number: | 333-250004-01 | |
