| Portland Pet Food Company OR | Manufacturing | 0 | — | F |
| Portland Place OH | Healthcare & Social Assistance | 0 | — | F |
| Portland Products MI | Manufacturing | 0 | — | C |
| Portland School District ME | Educational Services | 3 | $59,616 | — |
| Portland Sheet Metal Works OR | Construction | 0 | — | A |
| Portland Specialty Baking OR | Manufacturing | 0 | — | D |
| Portland State University OR | Educational Services | 8 | $104,054 | — |
| Portland State University - Aramark OR | — | 0 | — | — |
| Portland Utilities Const. CO LLC TN | Construction | 0 | — | F |
| Portland Utilities Const. CO LLC TX | Construction | 0 | — | F |
| Portland Utilities Construction Co. LLC TN | Construction | 0 | — | F |
| Portland Volvo Cars ME | Retail Trade | 0 | — | D |
| Portland Water Bureau OR | Utilities | 0 | — | A |
| Portland Willamette OR | — | 0 | — | — |
| Portland Winair Co CT | Wholesale Trade | 0 | — | F |
| Porto's Bakery CA | Manufacturing | 0 | — | F |
| Porto's Bakery Northridge, Inc CA | Manufacturing | 0 | — | F |
| Portobello America TN | Manufacturing | 0 | — | D |
| Portofino Hotel and Marina CA | Accommodation & Food Services | 0 | — | F |
| PORTOLA CONSTRUCTION INC. CA | Construction | 0 | — | F |
| Portola Hotel & Spa CA | Accommodation & Food Services | 0 | — | F |
| Portola Tech International Inc. RI | — | 0 | — | — |
| Portola/Alexion CA | — | 0 | — | — |
| PORTON USA LLC NJ | Manufacturing | 3 | $115,000 | — |
| Portrait Construction of Florida, Inc. FL | Construction | 0 | — | D |
| Portrans Systems CA | Transportation & Warehousing | 0 | — | A |
| Ports America CA | Transportation & Warehousing | 0 | — | C |
| Ports America FL | Transportation & Warehousing | 0 | — | D |
| Ports America GA | Transportation & Warehousing | 0 | — | D |
| Ports America LA | Transportation & Warehousing | 0 | — | C |
| Ports America MS | Transportation & Warehousing | 0 | — | F |
| Ports America NC | Transportation & Warehousing | 0 | — | C |
| Ports America SC | Transportation & Warehousing | 0 | — | F |
| Ports America TX | Transportation & Warehousing | 0 | — | C |
| Ports America WA | Transportation & Warehousing | 0 | — | F |
| Ports America Chesapeake LLC MD | Transportation & Warehousing | 0 | — | F |
| Ports America Shared Services Inc. AZ | Transportation & Warehousing | 1 | $225,000 | — |
| Ports America Shared Services, Inc. CA | — | 0 | — | — |
| Ports America-Tti Operations & Marine Terminals CA | — | 0 | — | — |
| Ports Petroleum Co., Inc. OH | Wholesale Trade | 0 | — | C |
| PortSide Builders, Inc. WI | Construction | 0 | — | F |
| Portside Cargo Service II, LLC. GA | Transportation & Warehousing | 0 | — | A |
| Portsmouth City Public Schools VA | Educational Services | 8 | $49,568 | — |
| Portsmouth Health & Rehab OH | Healthcare & Social Assistance | 0 | — | F |
| Portsmouth Public Schools VA | Educational Services | 38 | $60,384 | — |
| Portus Services LLC FL | — | 0 | — | — |
| Portus Stevedoring FL | Transportation & Warehousing | 0 | — | A |
| Portzen Construction IA | Construction | 0 | — | F |
| Porvair Filtration Group ME | Manufacturing | 0 | — | A |
| Porvair Filtration Group Inc. VA | Manufacturing | 0 | — | A |
