| 1 | KWUU | FRAMATOME GMBH | | D | BIC |
| 2 | KWUU | AREVA NP GMBH | | | SCAC4 |
| 3 | KWUX | Siemens Westinghouse Power Corp. | added 4/2001; eliminated 10/2004; 7/2005 (not listed) | | NAKINA |
| 4 | KWUX | Siemens Power Corp. | added 10/1990; 1/1994-7/2000; eliminated 4/2001 | | NAKINA |
| 5 | KWUX | Utility Power Corp. | added 1/1983; eliminated 10/1990 | | NAKINA |
| 6 | KWUX | Allis-Chalmers Power Systems, Inc. | added 10/1976; 1/1980; eliminated 1/1983 | | NAKINA |
| 7 | KWUX | Allis-Chalmers Power Systems, Inc. | 1/80; eliminated 1/83 | | NRHS |
| 8 | KWUX | Utility Power Corp. | added 1/83; eliminated 10/90 | | NRHS |
| 9 | KWUX | Siemens Power Corp. | added 10/90; 1/94-7/2000; eliminated 4/2001 | | NRHS |
| 10 | KWUX | Siemens Westinghouse Power Corp. | added 4/2001 | | NRHS |
| 11 | KWUX | SIEMENS WESTINGHOUSE POWER CORPORATION [UTILITY POWER CORP.; ALLIS-CHALMERS POWER SYSTEMS, INC.] | | | PWRC |
| 12 | KWUX | Utility Power Corporation (Siemens Westinghouse Power Corporation) | | | RSRV |
| 13 | KWUX | SIEMENS ENERGY INC | | | SCAC4 |