| 1 | PPIA | PIRO PAVING INC | | | SCAC4 |
| 2 | PPIB | PLANTATION PETROLEUM INC | | | SCAC4 |
| 3 | PPIC | PRESSURE PIPE INSPECTION COMPANY LT | | | SCAC4 |
| 4 | PPIE | PIONEER PIPE INC | | | SCAC4 |
| 5 | PPIF | PIONEER PACIFIC INC | | | SCAC4 |
| 6 | PPIG | PRONTO PIG INC | | | SCAC3 |
| 7 | PPIN | PRO TRANSPORTATION INC | | | SCAC3 |
| 8 | PPIN | PEPIN LUMBER INC | | | SCAC4 |
| 9 | PPIP | PRAIRIE PIPELINE CONTRACTORS INC | | | SCAC4 |
| 10 | PPIU | PPI LINES LTD. | | | SCAC3 |
| 11 | PPIV | PROUD PARENTS INVESTMENTS CO | | | SCAC4 |
| 12 | PPIX | Pacific Petrochemicals, Inc. | eliminated 4/1970 | | NAKINA |
| 13 | PPIX | Ashland Oil & Refining Co. | added 7/1968 | | NAKINA |
| 14 | PPIX | Pacific Petrochemicals, Inc. | added 10/1965; 10/1966; eliminated 7/1968 | | NAKINA |
| 15 | PPIX | National Car Co. | eliminated 7/1959 | | NAKINA |
| 16 | PPIX | Fruit Growers Express Co. (reporting marks for Pearl Packing Co.) | 7/1937-10/1957 | | NAKINA |
| 17 | PPIX | Pearl Packing Co. | 7/1935 | | NAKINA |
| 18 | PPIX | Pearl Packing Co. (National Car Co.) | Apr-38 | | NRHS |
| 19 | PPIX | Fruit Growers Express Co. | 1/52-10/57 | | NRHS |
| 20 | PPIX | National Car Co. | eliminated 7/59 | | NRHS |
| 21 | PPIX | Pacific Petrochemicals, Inc. | added 10/65; 10/66; eliminated 7/68 | | NRHS |
| 22 | PPIX | Ashland Oil & Refining Co. | added 7/68 | | NRHS |
| 23 | PPIX | Pacific Petrochemicals, Inc. | eliminated 4/70 | | NRHS |
| 24 | PPIX | *PEARL PACKING CO. (NCCO; FRUIT GROWERS EXPRESS CO.) | | | PWRC |
| 25 | PPIX | *PACIFIC PETROCHEMICALS (ASHLAND OIL & REFINING CO.) | | | PWRC |
| 26 | PPIX | PACIFIC PETROCHEMICALS INC | | | SCAC3 |
| 27 | PPIZ | PEPIN IRESCO, INC. | | | PWRC |
