| 1 | WPRX | Wainwright Producers and Refiners Ltd. | added 4/1956; 10/1957-4/1961; eliminated 4/1962 | | NAKINA |
| 2 | WPRX | Union Tank Car Co. | added 4/1962; eliminated 10/1962 | | NAKINA |
| 3 | WPRX | Fruit Growers Express Co. | added 7/1968; 4/1970-1/1975; eliminated 7/1978 | | NAKINA |
| 4 | WPRX | Wainwright Producers and Refiners Ltd. | 10/57-4/61; eliminated 4/62 | | NRHS |
| 5 | WPRX | Union Tank Car Co. | added 4/62 | | NRHS |
| 6 | WPRX | Fruit Growers Express Co. | added 7/68; 4/70-1/75; eliminated 7/78 | | NRHS |
| 7 | WPRX | *WAINWRIGHT PRODUCERS & REFINERS LTD. | | | PWRC |
| 8 | WPRX | *FRUIT GROWERS EXPRESS CO. [UNION TANK CAR CO.] | | | PWRC |
| 9 | WPRX | *WESTPORT RAILWAY CORPORATION FOUNDATION | | | PWRC |
