| 1 | PGA | Portugalia | IATA: NI | | ICAO1 |
| 2 | PGAA | PEGASUS LOGISTICS GROUP | | | SCAC4 |
| 3 | PGAB | PAGE & BARNHILL TRUCKING INC | | | SCAC3 |
| 4 | PGAC | PETER GUNN AUTO SALES & LEASING INC | | | SCAC4 |
| 5 | PGAD | PGA DELIVERY SERVICE INC | | | SCAC3 |
| 6 | PGAD | PINZGAUER CANADA | | | SCAC4 |
| 7 | PGAM | PEP GAS | | | SCAC4 |
| 8 | PGAO | PRESTIGE AUTO TRANSPORT | | | SCAC4 |
| 9 | PGAR | PARTNERS BULK LOGISTICS | | | SCAC4 |
| 10 | PGAS | PERMAGAS INC | | | SCAC3 |
| 11 | PGAU | PAN-GULF LOGISTICS LTD | | | SCAC4 |
| 12 | PGAX | Continental Tank Car Corp. | added 1/1979; eliminated 10/1979; 1/1980 | | NAKINA |
| 13 | PGAX | Pressure Tank Car Co. | added 1/1964; 7/1965-1/1975; eliminated 1/1979 | | NAKINA |
| 14 | PGAX | Pressure Tank Car Co. | 7/65-1/75; eliminated 1/79 | | NRHS |
| 15 | PGAX | Continental Tank Car Corp. | added 1/79; 1/80 | | NRHS |
| 16 | PGAX | CONTINENTAL TANK CAR CORP. [PRESSURE TANK CAR CO.] | | | PWRC |
| 17 | PGAX | PRESSURE TANK CAR CO | | | SCAC3 |
