| 1 | VELX | Daniel Vela | 4/1938 (not listed) | | NAKINA |
| 2 | VELX | Cia. Distributora de Gas, S.A. | 1/1941-7/1965; eliminated 10/1965 | | NAKINA |
| 3 | VELX | Velsicol Chemical Corp. | added 7/1969; 4/1970-1/1980; eliminated 1/1980; added 4/1980 | | NAKINA |
| 4 | VELX | Cia. Distributora de Gas, S.A. | 1/52-7/65; eliminated 10/65 | | NRHS |
| 5 | VELX | Velsicol Chemical Corp. | added 7/69; 4/70-1/80; eliminated 1/80; added 4/80 | | NRHS |
| 6 | VELX | *DANIEL VELA | | | PWRC |
| 7 | VELX | *CIA. DISTRIBUTORA DE GAS, SA | | | PWRC |
| 8 | VELX | *VELSICOL CHEMICAL CORP. | | | PWRC |
