| 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 |
| Williams NJ | Transportation & Warehousing | 0 | — | A |
| Williams NM | — | 0 | — | — |
| Williams NY | Mining & Extraction | 0 | — | F |
| Williams OH | Mining & Extraction | 0 | — | A |
| Williams OK | Mining & Extraction | 0 | — | A |
| Williams OR | Transportation & Warehousing | 0 | — | A |
| Williams PA | Transportation & Warehousing | 0 | — | A |
| Williams SC | Transportation & Warehousing | 0 | — | A |
| Williams TX | Transportation & Warehousing | 0 | — | A |
| Williams VA | Transportation & Warehousing | 0 | — | A |
| Williams WA | Transportation & Warehousing | 0 | — | A |
| Williams WV | Mining & Extraction | 0 | — | A |
| Williams WY | Transportation & Warehousing | 0 | — | B |
| Williams & Connolly LLP DC | Professional & Technical Services | 0 | — | D |
| Williams & Fudge, Inc SC | Administrative & Waste Services | 0 | — | A |
| Williams & Son Saw & Supply, Inc. LA | Manufacturing | 0 | — | F |
| Williams & Sons Masonry CA | Construction | 0 | — | F |
| Williams 6 Logistics TX | Transportation & Warehousing | 0 | — | F |
| Williams Adams Co CA | Manufacturing | 0 | — | A |
| WILLIAMS AND SONS MASONRY, INC CA | Construction | 0 | — | A |
| Williams AV, LLC MN | Manufacturing | 0 | — | A |
| Williams Blackstock Architects AL | Professional & Technical Services | 1 | $62,000 | — |
| Williams Brothers Construction Co., Inc. - Houston, TX TX | Construction | 0 | — | F |
| WILLIAMS BROTHERS CONSTRUCTION INC IA | Construction | 0 | — | A |
| WILLIAMS BROTHERS CONSTRUCTION INC IL | Construction | 0 | — | F |
| WILLIAMS BROTHERS CONSTRUCTION INC WI | Construction | 0 | — | A |
| Williams Brothers Trucking, Inc GA | Transportation & Warehousing | 0 | — | C |
| Williams Building Company, Inc. MA | Construction | 0 | — | A |