| 1 | WRSX | Wheeler, Reynolds & Stauffer | 7/1937-4/1961; eliminated 1/1962 | | NAKINA |
| 2 | WRSX | Stauffer Chemical Co. (Western Branch) | added 1/1962; eliminated 1/1963 | | NAKINA |
| 3 | WRSX | Scholle Corp. | added 4/1973; 1/1975-1/1980; eliminated 4/1989 | | NAKINA |
| 4 | WRSX | Warren Railcar Service, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 5 | WRSX | Wheeler, Reynolds & Stauffer | 4/38-4/61; eliminated 1/62 | | NRHS |
| 6 | WRSX | Stauffer Chemical Co. (Western Branch) | added 1/62 | | NRHS |
| 7 | WRSX | Scholle Corp. | added 4/73; 1/75-1/80; eliminated 4/89 | | NRHS |
| 8 | WRSX | Warren Railcar Service, Inc. | Jul-00 | | NRHS |
| 9 | WRSX | *STAUFFER CHEMICAL CO. [WHEELER, REYNOLDS & STAUFFER] | | | PWRC |
| 10 | WRSX | *SCHOLLE CORP. | | | PWRC |
| 11 | WRSX | *WHITE RIVER SCENIC RAILROAD | | | PWRC |
| 12 | WRSX | +WARREN RAILCAR SERVICE, INC. | | | PWRC |
| 13 | WRSX | Wheeler, Reynolds & Stauffer (Scholle Corp) | | | RSRV |
| 14 | WRSX | WARREN RAILCAR SERVICE, INC. | | | SCAC4 |