| 1 | MHLX | General American Transportation Corp. | 1/1975-1/1980; eliminated 10/1992 | | NAKINA |
| 2 | MHLX | General American Transportation Corp., Freight Car Division | added 10/1971 | | NAKINA |
| 3 | MHLX | Union Refrigerator Transit Lines, Division of General American Transportation Corp. | eliminated 10/1971 | | NAKINA |
| 4 | MHLX | Union Refrigerator Transit Lines | 4/1970 | | NAKINA |
| 5 | MHLX | Union Refrigerator Transit Lines, Division of General American Transportation Corp. | 10/1966 | | NAKINA |
| 6 | MHLX | Union Refrigerator Transit Lines | added 1/1962; 7/1965 | | NAKINA |
| 7 | MHLX | Union Refrigerator Transit Lines | added 1/62; 7/65 | | NRHS |
| 8 | MHLX | Union Refrigerator Transit Lines, Division of General American Transportation Corp. | Oct-66 | | NRHS |
| 9 | MHLX | Union Refrigerator Transit Lines | Apr-70 | | NRHS |
| 10 | MHLX | Union Refrigerator Transit Lines, Division of General American Transportation Corp. | eliminated 10/71 | | NRHS |
| 11 | MHLX | General American Transportation Corp., Freight Car Division | added 10/71 | | NRHS |
| 12 | MHLX | General American Transportation Corp. | 1/75-1/80; eliminated 10/92 | | NRHS |
| 13 | MHLX | (GATX; {UNION REFRIGERATOR TRANSIT LINES]) RETIRED 08-19-92 ATP (1360) [MILLER BREWING CO. - LESSEE] | | | PWRC |
| 14 | MHLX | General American Transportation Corporation (GATX) | | | RSRV |
| 15 | MHLX | MASCOUTIN HEIGHTS LEASING CO LLC | | | SCAC4 |