| 1 | TOLX | Travis Oil Co. | 8/1920 | | NAKINA |
| 2 | TOLX | Petrolite Corp., Ltd., Tretolite Co. Division | 1/1943-1/1952; eliminated 4/1953 | | NAKINA |
| 3 | TOLX | The TXL Oil Corp. | added 1/1962; eliminated 10/1962 | | NAKINA |
| 4 | TOLX | Texaco Inc. | added 10/1962; eliminated 7/1963 | | NAKINA |
| 5 | TOLX | Petrolite Corp., Ltd., Tretolite Co. Division | Jan-52 | | NRHS |
| 6 | TOLX | The TXL Oil Corp. | added 1/62 | | NRHS |
| 7 | TOLX | Texaco Inc. | eliminated 7/63 | | NRHS |
| 8 | TOLX | *TRAVIS OIL CO. | | | PWRC |
| 9 | TOLX | *PETROLITE CORP. LTD, TRETOLITE CO. DIV. | | | PWRC |
| 10 | TOLX | *TEXACO, INC. [TXL OIL CORP.] | | | PWRC |
