| 1 | PCTX | Pioneer Cement Co. of Texas | 1/1994-7/2005 (not listed) | | NAKINA |
| 2 | PCTX | Pioneer Cement Co. of Texas | 1/94-7/2000 | | NRHS |
| 3 | PCTX | PIONEER CEMENT CO. OF TEXAS, INC. [PIONEER CONCRETE OF TEXAS] | | | PWRC |
| 4 | PCTX | Pioneer Cement of Texas | | | RSRV |
| 5 | PCTX | PIONEER CONCRETE OF TEXAS, INC. | | | SCAC4 |
