| Pioneer POS Solution, Inc. CA | Manufacturing | 0 | — | A |
| Pioneer Powder Coatings IL | Manufacturing | 0 | — | A |
| Pioneer Power, Inc. MN | Construction | 0 | — | A |
| Pioneer Products, Inc. WI | Manufacturing | 0 | — | F |
| Pioneer Reinforcing Steel CA | Construction | 0 | — | A |
| Pioneer Resources, Inc. MI | Healthcare & Social Assistance | 0 | — | A |
| Pioneer Roofing Co AZ | Construction | 0 | — | A |
| Pioneer Roofing, A Tecta America Company, LLC WI | Construction | 0 | — | D |
| Pioneer Roofing, LLC WI | Construction | 0 | — | A |
| Pioneer Rural Electric Cooperative, Inc. OH | Utilities | 0 | — | A |
| Pioneer Service Inc IL | Manufacturing | 0 | — | A |
| Pioneer Services MO | — | 0 | — | — |
| Pioneer Software solutions LLC NJ | Professional & Technical Services | 1 | $90,000 | — |
| Pioneer Square Brands Inc NC | Manufacturing | 1 | $62,130 | — |
| Pioneer Steel, Inc. CO | Construction | 0 | — | C |
| Pioneer Tank Lines Inc MN | Transportation & Warehousing | 0 | — | C |
| Pioneer Tek Services Inc TX | Professional & Technical Services | 18 | $82,936 | — |
| Pioneer Telephone Cooperative OK | Information & Media | 0 | — | D |
| PIONEER THEATRES INC. CA | Real Estate | 0 | — | A |
| Pioneer Tool & Forge, Inc. PA | Manufacturing | 0 | — | F |
| Pioneer Tool and Die Co OH | Manufacturing | 0 | — | F |
| Pioneer Trace Group, LLC KY | Healthcare & Social Assistance | 0 | — | F |
| Pioneer Transformer Co. OH | Manufacturing | 0 | — | F |
| Pioneer Transport, Inc. OK | Transportation & Warehousing | 0 | — | F |
| Pioneer Transportation & Logistics TX | Transportation & Warehousing | 0 | — | A |
| Pioneer Transportation Corp. NY | Transportation & Warehousing | 0 | — | A |
| Pioneer Truckweld Inc. OR | Manufacturing | 0 | — | F |
| Pioneer Valley Books MA | Transportation & Warehousing | 0 | — | A |
| Pioneer Valley Cardiology Associates, Inc. MA | Healthcare & Social Assistance | 0 | — | F |
| Pioneer Valley Chinese Immersion Charter School MA | Educational Services | 4 | $54,655 | — |
| Pioneer Valley Environmental LLC MA | Construction | 0 | — | F |
| Pioneer Valley Photovoltaics Cooperative, Inc MA | Utilities | 0 | — | F |
| PIONEER VALLEY REFRIG WHSE INC MA | Transportation & Warehousing | 0 | — | D |
| Pioneer Vocational Industrial Services, Inc. KY | Healthcare & Social Assistance | 0 | — | F |
| Pioneer Waterproofing Company Inc OR | Construction | 0 | — | F |
| Pioneer West - Berthoud CO | Wholesale Trade | 0 | — | F |
| Pioneer West - Centennial CO | Wholesale Trade | 0 | — | F |
| Pioneer West Berthoud CO | Wholesale Trade | 0 | — | F |
| Pioneer West Centennial CO | Wholesale Trade | 0 | — | F |
| Pioneer Wholesale Co. OH | Wholesale Trade | 0 | — | A |
| Pioneer Window Mfg. Corp. NY | Manufacturing | 0 | — | F |
| Pioneers Harvest CO | Manufacturing | 0 | — | A |
| Pioneers Medical Center CO | Healthcare & Social Assistance | 0 | — | C |
| Pioneers Memorial Healthcare District CA | Healthcare & Social Assistance | 1 | $97,760 | F |
| PIORION SOLUTIONS,INC NJ | Professional & Technical Services | 9 | $106,991 | — |
| PIP Global MN | Manufacturing | 0 | — | A |
| PIP'S IRON WORKS, INC. TN | Manufacturing | 0 | — | F |
| Pipe & Steel Industrial Fabricators LA | Manufacturing | 0 | — | A |
| Pipe and Duct Systems, LLC MO | Construction | 0 | — | A |
| Pipe and Plant Solutions, Inc CA | Construction | 0 | — | A |
