| 1 | SPCX | Superior Packing Co. | 7/1932 | | NAKINA |
| 2 | SPCX | Fruit Growers Express Co. | 7/1937-4/1938 | | NAKINA |
| 3 | SPCX | E.H. Saunders | 1/1945 (not listed) | | NAKINA |
| 4 | SPCX | Saunders Petroleum Co. | 1/1950 | | NAKINA |
| 5 | SPCX | Saskatchewan Power Corp. | added 7/1978; 1/1980; eliminated 10/1982 | | NAKINA |
| 6 | SPCX | SP Construction Services | added 1/1997; eliminated 4/1998 | | NAKINA |
| 7 | SPCX | Qwest Communications Corp. | added 4/1998; eliminated 7/1998; 7/2000-7/2005 (not listed) | | NAKINA |
| 8 | SPCX | Superior Packing Co. (National Car Co.) | Apr-38 | | NRHS |
| 9 | SPCX | Saskatchewan Power Corp. | added 7/78; 1/80; eliminated 10/82 | | NRHS |
| 10 | SPCX | SP Construction Services | added 1/97; eliminated 4/98 | | NRHS |
| 11 | SPCX | Qwest Communications Corp. | added 4/98; eliminated 7/98; 7/2000 | | NRHS |
| 12 | SPCX | *SUPERIOR PACXKING CO. (FRUIT GROWERS EXPRESS CO.) | | | PWRC |
| 13 | SPCX | *SAUNDERS PETROLEUM CO. [E. H. SAUNDERS] | | | PWRC |
| 14 | SPCX | *SASKATCHEWAN POWER CORP. | | | PWRC |
| 15 | SPCX | *SPRINGERVILLE & CORONADO RAILROAD LINES | | | PWRC |
| 16 | SPCX | *QWEST COMMUNICATIONS CORPORATION [SP CONSTRUCTION SERVICES] | | | PWRC |
| 17 | SPCX | Saskatchewan Power Corporation | | | RSRV |
