| 1 | TGIX | Texas Gulf, Inc. | added 10/1972; eliminated 1/1974 | | NAKINA |
| 2 | TGIX | Texasgulf Inc. | added 1/1974; 1/1975; eliminated 1/1978 | | NAKINA |
| 3 | TGIX | Texasgulf Inc., Sulphur Operation | added 1/1978; 1/1980; eliminated 10/1980 | | NAKINA |
| 4 | TGIX | Texasgulf Inc. | 1/1994; eliminated 10/1995 | | NAKINA |
| 5 | TGIX | PCS Phosphate Co., Inc. | added 10/1995; 7/2000-7/2005 | | NAKINA |
| 6 | TGIX | Texas Gulf, Inc. | added 10/72 | | NRHS |
| 7 | TGIX | Texasgulf Inc. | 1/75; eliminated 1/78 | | NRHS |
| 8 | TGIX | Texasgulf Inc., Sulphur Operation | added 1/78; 1/80; eliminated 10/80 | | NRHS |
| 9 | TGIX | Texasgulf Inc. | 1/94; eliminated 10/95 | | NRHS |
| 10 | TGIX | PCS Phosphate Co., Inc. | added 10/95; 7/2000 | | NRHS |
| 11 | TGIX | PCS PHOSPHATE COMPANY [TEXASGULF INC.] | | | PWRC |
| 12 | TGIX | Texasgulf (PCS Phosphate) | | | RSRV |