| William Charles, Inc NV | Construction | 0 | — | A |
| William Cox Dental Corporation CA | Healthcare & Social Assistance | 1 | $186,000 | — |
| William Dale Young & Sons, Inc., Cocopah Nurseries AZ | — | 0 | — | — |
| William Davidson Institute at the University of Michigan MI | Professional & Technical Services | 1 | $116,225 | — |
| William Dudek Mfg Co Inc IL | Manufacturing | 0 | — | A |
| William E. Walter, Inc. MI | Construction | 0 | — | A |
| William F Sullivan & Co Inc MA | Wholesale Trade | 0 | — | F |
| William F. Lynch Co., Inc MA | Construction | 0 | — | C |
| William Gottlieb Management Co., LLC NY | — | 0 | — | — |
| William Grant & Sons Inc. NJ | Manufacturing | 0 | — | A |
| William Grant & Sons Inc. NY | Wholesale Trade | 0 | — | A |
| William H Lane.Inc NY | Construction | 0 | — | F |
| William H. Lane Incorporated NY | Construction | 0 | — | F |
| William H. Smith & Associates, Inc. WY | Professional & Technical Services | 0 | — | A |
| William J Jones & So nInc NJ | Wholesale Trade | 0 | — | F |
| William J. Peltier & Associates, Inc. GA | Construction | 1 | $126,500 | — |
| William J. Schwarz. P.T., P.C. NY | Healthcare & Social Assistance | 1 | $58,500 | — |
| William James College MA | Educational Services | 1 | $75,000 | — |
| William Kreysler & Associates CA | Manufacturing | 0 | — | F |
| William L. Watson Co., Inc. NY | Construction | 0 | — | A |
| William M Perkins Company CA | Construction | 0 | — | F |
| William M. Cafaro & Associates, LLC OH | Real Estate | 0 | — | F |
| William Molnar Roofing MI | Construction | 0 | — | A |
| William Morris Endeavor Entertainment LLC CA | — | 0 | — | — |
| WILLIAM MORRIS ENDEAVOR ENTERTAINMENT LLC NY | Arts & Entertainment | 1 | $400,000 | — |
| William N Lamarre Concrete Products, Inc. NH | Manufacturing | 0 | — | F |
| William Newton Memorial Hospital KS | Healthcare & Social Assistance | 0 | — | D |
| William Paterson University NJ | Educational Services | 2 | $100,769 | — |
| William Penn House, Inc. PA | Real Estate | 0 | — | A |
| WILLIAM QUINN AND SONS IL | Administrative & Waste Services | 0 | — | A |
| William R. Nash VI, Inc. VI | Construction | 0 | — | A |
| William R. Nash, Inc. FL | Construction | 0 | — | D |
| William S. Nadler Jr. ,Inc LA | Manufacturing | 0 | — | A |
| William T Payne DBA Tim Payne Painting TN | Construction | 0 | — | A |
| William T. Connelly, Inc. IL | Construction | 0 | — | B |
| William Warren Properties, Inc. CA | Real Estate | 0 | — | D |
| William Woods University MO | Educational Services | 0 | — | D |
| William's Sausage TN | Manufacturing | 0 | — | A |
| Williamette Falls Paper Company OR | — | 0 | — | — |
| Williams AL | Transportation & Warehousing | 0 | — | A |
| Williams AZ | Transportation & Warehousing | 0 | — | A |
| Williams CO | Transportation & Warehousing | 0 | — | A |
| Williams GA | Transportation & Warehousing | 0 | — | A |
| Williams ID | Transportation & Warehousing | 0 | — | A |
| Williams KS | Mining & Extraction | 0 | — | A |
| Williams LA | Transportation & Warehousing | 0 | — | A |
| Williams MD | Transportation & Warehousing | 0 | — | A |
| Williams MS | Transportation & Warehousing | 0 | — | C |
| Williams NC | Transportation & Warehousing | 0 | — | D |
| Williams ND | Transportation & Warehousing | 0 | — | A |
