| 1 | LARX | Ashland Oil & Refining Co. | added 1/1963; 7/1965-10/1966; eliminated 4/1970 | | NAKINA |
| 2 | LARX | Aetna Oil Co., a Division of Ashland Oil & Refining Co. | added 4/1954; 7/1954-4/1961; eliminated 1/1963 | | NAKINA |
| 3 | LARX | Aetna Oil Co., Inc. | 1/1941-1/1952; eliminated 4/1954 | | NAKINA |
| 4 | LARX | Aetna Oil Service, Inc. | 7/1930-4/1938 | | NAKINA |
| 5 | LARX | Aetna Refining Co. | 8/1920-7/1923 | | NAKINA |
| 6 | LARX | Aetna Oil Co., Inc. | 4/38-1/52; eliminated 4/54 | | NRHS |
| 7 | LARX | Aetna Oil Co., a Division of Ashland Oil & Refining Co. | added 4/54; 10/57-4/61 | | NRHS |
| 8 | LARX | Ashland Oil & Refining Co. | 7/65-10/66; eliminated 4/70 | | NRHS |
| 9 | LARX | *ASHLAND OIL & REFINING CO. [AETNA OIL CO.; AETNA REFINING CO.] | | | PWRC |
| 10 | LARX | *LEWISTOWN & AUBURN RAILROAD | | | PWRC |
| 11 | LARX | ASHLAND OIL & REFINING CO | | | SCAC3 |