| 1 | CAPX | TransAlta Utilities Corp. | added 10/1981; 1/1994-7/2000; eliminated 4/2002; 7/2005 (not listed) | | NAKINA |
| 2 | CAPX | Clay Arthur Pierce (Pierce Oil Corp.) | 8/1920 | | NAKINA |
| 3 | CAPX | The Capital City Products Co. | 1/1941-4/1961; eliminated 7/1965 | | NAKINA |
| 4 | CAPX | The Capital City Products Co. | 1/52-4/61; eliminated 7/65 | | NRHS |
| 5 | CAPX | TransAlta Utilities Corp. | added 10/81; 1/94-7/2000 | | NRHS |
| 6 | CAPX | *CLAY ARTHUR PIERCE (PIERCE OIL CORP.) | | | PWRC |
| 7 | CAPX | *CAPITAL CITY PRODUCTS CO. | | | PWRC |
| 8 | CAPX | +TRANSALTA UTILITIES CORPORATION | | | PWRC |
| 9 | CAPX | Capital City Products (TransAlta Utilities) | | | RSRV |
| 10 | CAPX | CANADA PACKERS LTD | | | SCAC3 |
| 11 | CAPX | TRANSALTA UTILITIES CORPORATION | | | SCAC4 |