1 | TREX | Tetra Technologies, Inc. | added 1/1990; 1/1994; eliminated 4/2000; 7/2000-7/2005 (not listed) | | NAKINA |
2 | TREX | Tetra Technologies, Inc. | added 1/90; 1/94; eliminated 4/2000; 7/2000 | | NRHS |
3 | TREX | *TRINITY RAILWAY EXPRESS | | | PWRC |
4 | TREX | +TETRA TECHNOLOGIES, INC. | | | PWRC |
5 | TREX | Tetra Technologies | | | RSRV |
6 | TREX | TETRA TECHNOLOGIES, INC. | | | SCAC4 |