| 1 | WACX | Albright & Wilson Co. | added 4/1990; 1/1994-7/2000; eliminated 10/2003 | | NAKINA |
| 2 | WACX | PCS Phosphate Co. | added 10/2003; 7/2005 | | NAKINA |
| 3 | WACX | Albright & Wilson Company | added 4/90; 1/94-7/2000 | | NRHS |
| 4 | WACX | *WILLARD AGRICULTURAL COMPANY | | | PWRC |
| 5 | WACX | +PCS PHOSPHATE COMPANY INCORPORATED [ALBRIGHT & WILSON COMPANY] | | | PWRC |
| 6 | WACX | Willard Agricultural Co. (PCS Phosphate) | | | RSRV |
| 7 | WACX | PCS PHOSPHATE COMPANY INC | | | SCAC4 |
