| 1 | WRPD | WARP, D J INC | | | SCAC4 |
| 2 | WRPE | WHITE RIVER PETROLEUM CO INC | | | SCAC4 |
| 3 | WRPI | Western R.R. Properties, Inc. | added 10/1984; 1/1994; eliminated 4/1996; 7/2000-7/2005 | | NAKINA |
| 4 | WRPI | Western R.R. Properties, Inc. | added 10/84; 1/94; eliminated 4/96; 7/2000 | | NRHS |
| 5 | WRPI | WESTERN RAILROAD PROPERTIES, INC. | | | PWRC |
| 6 | WRPI | Western Railroad Properties | | | RSRV |
| 7 | WRPN | WISE TRANSPORTATION, INC | | | SCAC1 |
| 8 | WRPT | WALTER PRODUCTS INC | | | SCAC4 |
| 9 | WRPX | Warr-Penn Refining Co. | 7/1930-7/1932 | | NAKINA |
| 10 | WRPX | Public Service Co. of Indiana, Inc. | added 10/1978; 1/1980; eliminated 1/1991 | | NAKINA |
| 11 | WRPX | PSI Energy, Inc. | added 1/1991; 1/1994; eliminated 10/1998; 7/2000 (not listed); added 10/2000; eliminated 1/2001; 7/2005 (not listed) | | NAKINA |
| 12 | WRPX | Public Service Co. of Indiana, Inc. | added 10/78; 1/80; eliminated 1/91 | | NRHS |
| 13 | WRPX | PSI Energy, Inc. | added 1/91; 1/94; eliminated 10/98; 7/2000; added 10/2000; eliminated 1/2001 | | NRHS |
| 14 | WRPX | *WARR-PENN REFINING CO. | | | PWRC |
| 15 | WRPX | *(PSIX) PSI ENERGY, INC. (PUBLIC SERVICE CO. OF INDIANA) | | | PWRC |
| 16 | WRPX | Warr-Penn Refining (Public Service of Indiana) | | | RSRV |