| 1 | MCHX | Trinity Rail Management, Inc. | added 7/1997; 7/2000-7/2005 | | NAKINA |
| 2 | MCHX | Transcisco Leasing Co. | added 1/1991; 1/1994; eliminated 7/1997 | | NAKINA |
| 3 | MCHX | Transcisco Rail Services Co. | added 4/1990; eliminated 1/1991 | | NAKINA |
| 4 | MCHX | Railcar Maintenance Co. | added 10/1989; eliminated 4/1990 | | NAKINA |
| 5 | MCHX | PLM Railcar Maintenance Co. | added 4/1985; eliminated 10/1989 | | NAKINA |
| 6 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/1954; 7/1954; eliminated 7/1955 | | NAKINA |
| 7 | MCHX | Monsanto Chemical Co., Merrimac Division | 4/1938-1/1952; eliminated 4/1954 | | NAKINA |
| 8 | MCHX | Merrimac Chemical Co. | 7/1937 | | NAKINA |
| 9 | MCHX | Merrimac Chemical Co., Inc. | 7/1930-7/1935 | | NAKINA |
| 10 | MCHX | Merrimac Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 11 | MCHX | Merrimac Chemical Co. -- Monsanto Chemical Co., Merrimac Division | Apr-38 | | NRHS |
| 12 | MCHX | Monsanto Chemical Co., Merrimac Division | 1/52; eliminated 4/54 | | NRHS |
| 13 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/54; eliminated 7/55 | | NRHS |
| 14 | MCHX | PLM Railcar Maintenance Co. | added 4/85; eliminated 10/89 | | NRHS |
| 15 | MCHX | Railcar Maintenance Co. | added 10/89; eliminated 4/90 | | NRHS |
| 16 | MCHX | Transcisco Rail Services Co. | added 4/90; eliminated 1/91 | | NRHS |
| 17 | MCHX | Transcisco Leasing Co. | added 1/91; 1/94; eliminated 7/97 | | NRHS |
| 18 | MCHX | Trinity Rail Management, Inc. | added 7/97; 7/2000 | | NRHS |
| 19 | MCHX | *MONSANTO CHEMICAL CO., MERRIMAC CHEMICAL CO. DIV. | | | PWRC |
| 20 | MCHX | +TRINITY RAIL MANAGEMENT INC. [TRANSCISCO LEASING COMPANY; PLM RAILCAR MAINTENANCE CO.] | | | PWRC |
| 21 | MCHX | Monsanto Chemical Co. (Trinity Rail Management) | | | RSRV |
| 22 | MCHX | TRINITY RAIL | | | SCAC4 |
| 23 | MCHX | Transcisco Rail Services Co. | | USA | TRAFFIC |
