| Proterra Operating Company, Inc SC | Manufacturing | 0 | — | F |
| Proterra Operating Company, Inc. CA | — | 0 | — | — |
| Proterra Powered LLC SC | — | 0 | — | — |
| Proterra Powered LLC (f/k/a Volvo Battery Solutions, LLC) CA | Manufacturing | 2 | $142,844 | — |
| Proterra Powered, LLC CA | Manufacturing | 6 | $121,050 | — |
| Proterra Powered, LLC FL | Manufacturing | 1 | $88,941 | — |
| Proterra, Inc CA | Manufacturing | 0 | — | C |
| PROTESTANT MEMORIAL MEDICAL CENTER, INC. DBA Memorial Care Center IL | Healthcare & Social Assistance | 0 | — | A |
| PROTESTANT MEMORIAL MEDICAL CENTER, INC. DBA Memorial Hospital IL | Healthcare & Social Assistance | 0 | — | F |
| Proteus Digital Health, Inc. CA | — | 0 | — | — |
| Proteus, Inc. CA | Healthcare & Social Assistance | 0 | — | F |
| Protexer MO | Wholesale Trade | 0 | — | A |
| Prothena Biosciences Inc CA | — | 0 | — | — |
| ProThera Inc., dba SFI USA NV | Manufacturing | 0 | — | B |
| Prothro Chevrolet Co Inc SC | Retail Trade | 0 | — | A |
| Protiviti Inc. CA | Professional & Technical Services | 6 | $194,954 | — |
| Proto Gage Tool & Die Inc MI | Manufacturing | 0 | — | F |
| Proto Plastics, Inc. OH | Manufacturing | 0 | — | A |
| Proto Technologies, Inc WA | Manufacturing | 0 | — | A |
| Protocall Communications, Inc. MD | — | 0 | — | — |
| Protochips NC | Manufacturing | 0 | — | D |
| Protocoding LLC MI | Professional & Technical Services | 1 | $117,749 | — |
| Protocol Labs, Inc. DE | Information & Media | 1 | $155,000 | — |
| Protocon Ready Mix MI | Manufacturing | 0 | — | F |
| Protofab Engineering MN | Manufacturing | 0 | — | F |
| ProTom International MA | Manufacturing | 0 | — | A |
| Protomet TN | Manufacturing | 0 | — | F |
| PROTON AL NAJM LLC AZ | Professional & Technical Services | 1 | $85,000 | — |
| Proton Energy Systems, Inc. CT | Manufacturing | 0 | — | F |
| ProtoPack OH | Manufacturing | 0 | — | D |
| Prototech Laser, Inc. MI | Manufacturing | 0 | — | F |
| ProtoTechnologies, Inc. WA | Manufacturing | 0 | — | A |
| Prototek Digital Manufacturing (Concord) LLC NH | Manufacturing | 0 | — | F |
| Prototek Digital Manufacturing (Eau Claire) LLC WI | Manufacturing | 0 | — | A |
| Prototek Digital Manufacturing (Madison) LLC WI | Manufacturing | 0 | — | F |
| Prototek Digital Manufacturing (Sacramento) LLC CA | Manufacturing | 0 | — | F |
| Prototek Digital Manufacturing (San Jose) LLC CA | Manufacturing | 0 | — | F |
| Prototek Wisconsin LLC WI | Manufacturing | 0 | — | F |
| Prototype Machine Company TX | Manufacturing | 0 | — | F |
| PROTOTYPE MACHINE COMPANY DBA/ RANDOLPH AUSTIN COMPANY TX | Manufacturing | 0 | — | F |
| ProTrans International LLC IN | Transportation & Warehousing | 1 | $88,816 | — |
| ProTrans International LLC KY | Transportation & Warehousing | 0 | — | C |
| ProTrans International LLC SC | Transportation & Warehousing | 0 | — | D |
| ProTrans International LLC TX | Transportation & Warehousing | 0 | — | C |
| Protrans Logistics Inc NY | Manufacturing | 0 | — | A |
| PROTRANS LOGISTICS SERVICES INC. GA | Administrative & Waste Services | 0 | — | F |
| PROTRANS LOGISTICS SERVICES INC. NY | Administrative & Waste Services | 0 | — | A |
| PROTRANS PERSONNEL SERVICES INC. NY | Administrative & Waste Services | 0 | — | A |
| Protrans Services Inc NY | Manufacturing | 0 | — | F |
| Protransport-1 LLC CA | Healthcare & Social Assistance | 0 | — | F |
