| 1 | NACX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 2 | NACX | North American Chemical Co. | added 4/1991; eliminated 10/1991 | | NAKINA |
| 3 | NACX | General Electric Railcar Services Corp. | added 10/1991; 1/1994; eliminated 1/2000 | | NAKINA |
| 4 | NACX | North American Car Corp. | added 1/1976; eliminated 10/1979 | | NAKINA |
| 5 | NACX | Hooker Chemical Corp. | 4/1970; eliminated 4/1971 | | NAKINA |
| 6 | NACX | Niagara Alkali Co. (Hooker Chemical Corp.) | 10/1966 | | NAKINA |
| 7 | NACX | Hooker Chemical Corp. | added 10/1958; 4/1961-7/1965 | | NAKINA |
| 8 | NACX | Hooker Electrochemical Co. | 10/1957; eliminated 10/1958 | | NAKINA |
| 9 | NACX | Hooker Chemical Corp. | added 7/1956 | | NAKINA |
| 10 | NACX | Niagara Alkali Co. | 8/1920-7/1954; eliminated 7/1956 | | NAKINA |
| 11 | NACX | Niagara Alkali Co. | 4/38-1/52; eliminated 7/56 | | NRHS |
| 12 | NACX | Hooker Chemical Corp. | added 7/56 | | NRHS |
| 13 | NACX | Hooker Electrochemical Co. | 10/57; eliminated 10/58 | | NRHS |
| 14 | NACX | Hooker Chemical Corp. | added 10/58; 4/61-7/65 | | NRHS |
| 15 | NACX | Niagara Alkali Co. (Hooker Chemical Corp.) | Oct-66 | | NRHS |
| 16 | NACX | Hooker Chemical Corp. | 4/70; eliminated 4/71 | | NRHS |
| 17 | NACX | North American Chemical Co. | added 4/91; eliminated 10/91 | | NRHS |
| 18 | NACX | General Electric Railcar Services Corp. | added 10/91; 1/94; eliminated 1/2000 | | NRHS |
| 19 | NACX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 20 | NACX | *HOOKER CHEMICAL CORP. [NIAGARA ALKALI CO.] | | | PWRC |
| 21 | NACX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORPORATION | | | PWRC |
| 22 | NACX | Niagara Alkali Co. (GE Rail Services) | | | RSRV |
| 23 | NACX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |