| 1 | NPIX | Chem-Nuclear Systems, LLC | 7/2000-7/2005 (not listed) | | NAKINA |
| 2 | NPIX | VECTRA Technologies, Inc. | added 7/1997; eliminated 4/1998 | | NAKINA |
| 3 | NPIX | Nuclear Packaging, Inc. | added 1/1988; 1/1994; eliminated 4/1994 | | NAKINA |
| 4 | NPIX | Nuclear Packaging, Inc. | added 1/88; 1/94; eliminated 4/94 | | NRHS |
| 5 | NPIX | VECTRA Technologies, Inc. | added 7/97; eliminated 4/98 | | NRHS |
| 6 | NPIX | Chem-Nuclear Systems, LLC | Jul-00 | | NRHS |
| 7 | NPIX | CHEM-NUCLEAR SYSTEMS LLC [VECTRA TECHNOLOGIES, INC.; NUCLEAR PACKAGING, INC.] | | | PWRC |
| 8 | NPIX | Chem-Nuclear Systems | | | RSRV |
