| 1 | MRCX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 2 | MRCX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | | NAKINA |
| 3 | MRCX | Itel Rail Corp. | added 4/1988; eliminated 10/1992 | | NAKINA |
| 4 | MRCX | Evans Railcar Leasing Co. | added 10/1980; eliminated 4/1988 | | NAKINA |
| 5 | MRCX | United States Railway Leasing Co. | added 4/1980; eliminated 10/1980 | | NAKINA |
| 6 | MRCX | Morrison Railway Supply Corp. | added 4/1969; 4/1970-1/1980; eliminated 4/1980 | | NAKINA |
| 7 | MRCX | Metals Reserve Co., care of Tin Processing Corp. | 1/1943 | | NAKINA |
| 8 | MRCX | Merck & Co., Inc. | 7/1932 | | NAKINA |
| 9 | MRCX | Morrison Railway Supply Corp. | added 4/69; 4/70-1/80; eliminated 4/80 | | NRHS |
| 10 | MRCX | United States Railway Leasing Co. | added 4/80; eliminated 10/80 | | NRHS |
| 11 | MRCX | Evans Railcar Leasing Co. | added 10/80; eliminated 4/88 | | NRHS |
| 12 | MRCX | Itel Rail Corp. | added 4/88; eliminated 10/92 | | NRHS |
| 13 | MRCX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 1/2000 | | NRHS |
| 14 | MRCX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 15 | MRCX | *MERCK & CO., INC. | | | PWRC |
| 16 | MRCX | *METALS RESERVE CO. (TIN PROCESSING CORP.) | | | PWRC |
| 17 | MRCX | +(NATX) GEN. ELECTRIC RAILCAR SERVICES CORP. [ITEL RAIL CORP.; EVANS RAILCAR LEASING CO.; UNITED STATES RAILWAY LEASING CO.; MINER RAIL CAR SERVICE; MORRISON RAILWAY SUPPLY CORP.] | | | PWRC |
| 18 | MRCX | Evans Railcar Leasing (GE Rail Services Corporation) | | | RSRV |
| 19 | MRCX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |