| PetroCard Inc OR | Wholesale Trade | 0 | — | C |
| PetroCard Inc WA | Wholesale Trade | 0 | — | A |
| Petrochem Insulation, Inc. CA | Construction | 0 | — | A |
| Petrochem Insulation, Inc. IN | Construction | 0 | — | A |
| Petrochem Insulation, Inc. OR | Construction | 0 | — | A |
| Petrochem Insulation, Inc. PA | Construction | 0 | — | A |
| Petrochem Insulation, Inc. WA | Construction | 0 | — | F |
| Petrochem Materials Innovation, LLC CA | Manufacturing | 0 | — | F |
| PetroChoice Holdings, Inc PA | Wholesale Trade | 0 | — | A |
| PETROFF AG SERVICES CA | Agriculture & Forestry | 0 | — | F |
| Petroflex TX | Manufacturing | 0 | — | F |
| Petrol Advertising, Inc. CA | Professional & Technical Services | 2 | $80,000 | — |
| Petroleum TX | Manufacturing | 0 | — | A |
| Petroleum Carriers LLC NC | Transportation & Warehousing | 0 | — | F |
| Petroleum Carriers LLC VA | Transportation & Warehousing | 0 | — | F |
| Petroleum Club of Midland TX | Arts & Entertainment | 0 | — | D |
| Petroleum Containment Inc TN | Manufacturing | 0 | — | B |
| Petroleum Containment Inc. FL | Manufacturing | 0 | — | F |
| Petroleum Equipment Inc of Kansas City MO | Wholesale Trade | 0 | — | A |
| Petroleum Equipment Institute (PEI) OK | Other Services | 1 | $121,400 | — |
| Petroleum Equipment Service of NH CT | Other Services | 0 | — | C |
| Petroleum Equipment Service of NH NH | Other Services | 0 | — | A |
| Petroleum Equipment Service of NH NJ | Other Services | 0 | — | B |
| Petroleum Equipment Service of NH, LLC GA | Other Services | 0 | — | A |
| Petroleum Equipment Service of NH, LLC MA | Other Services | 0 | — | C |
| Petroleum Equipment Service of NH, LLC VA | Other Services | 0 | — | A |
| Petroleum Experience, Inc. ND | Mining & Extraction | 0 | — | A |
| Petroleum Express Inc TX | Transportation & Warehousing | 0 | — | A |
| Petroleum Geo-Services, Inc. TX | Professional & Technical Services | 1 | $118,286 | — |
| Petroleum Marketing Group CT | Wholesale Trade | 0 | — | B |
| Petroleum Marketing Group FL | Wholesale Trade | 0 | — | A |
| Petroleum Marketing Group VA | Wholesale Trade | 1 | $135,000 | — |
| Petroleum Recovery and Remediation Management, Inc. MD | Administrative & Waste Services | 0 | — | A |
| Petroleum Service Corp. TX | — | 0 | — | — |
| Petroleum Transport Company GA | Transportation & Warehousing | 0 | — | D |
| Petroleum Transport Company NC | Transportation & Warehousing | 0 | — | C |
| Petroleum Transport Company SC | Transportation & Warehousing | 0 | — | B |
| Petroleum Transport Company TN | Transportation & Warehousing | 0 | — | F |
| Petroleum Transport Company VA | Transportation & Warehousing | 0 | — | A |
| Petroleum Transport, Inc. TX | Transportation & Warehousing | 0 | — | A |
| Petroleum Wholesale TX | Wholesale Trade | 0 | — | A |
| Petroleum Wholesale UT | Wholesale Trade | 0 | — | F |
| Petron Corporation WI | Manufacturing | 0 | — | B |
| PetroSpecs, Inc. CA | Wholesale Trade | 0 | — | D |
| Petrotech Southeast, Inc. FL | Administrative & Waste Services | 0 | — | F |
| Petrotech, Inc LA | Manufacturing | 0 | — | A |
| Petrow's Restaurant NE | — | 0 | — | — |
| Petrozzi Enterprises Inc. NY | Other Services | 0 | — | F |
| PetSmart GA | Transportation & Warehousing | 0 | — | B |
| PetSmart IL | Transportation & Warehousing | 0 | — | A |
