| 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 |
| Williams Cheese Company MI | Manufacturing | 0 | — | F |
| Williams Cleaners NE | Other Services | 0 | — | D |
| Williams College MA | Educational Services | 5 | $1,330,287 | — |
| Williams Companies MT | Construction | 0 | — | F |
| Williams Companies OK | Administrative & Waste Services | 0 | — | A |
| Williams Company FL | Construction | 0 | — | D |
| Williams Concrete Accessories WA | Wholesale Trade | 0 | — | A |
| Williams Concrete Construction Co., Inc. OH | Construction | 0 | — | A |
| Williams Construction Arkansas Inc. MO | Construction | 0 | — | F |
| Williams Construction Company, INC. VA | Construction | 0 | — | F |
| Williams Construction LLC OK | Construction | 0 | — | A |
| Williams Contracting Co., LLC GA | Construction | 0 | — | F |
| Williams Cos OK | — | 0 | — | — |
| Williams Dental Lab CA | Manufacturing | 0 | — | A |
| Williams Distributing MI | Wholesale Trade | 0 | — | D |
| Williams Distributing OH | Wholesale Trade | 0 | — | A |
| Williams Electric NC | Construction | 0 | — | A |
| Williams Erection Company, Inc. GA | Construction | 0 | — | B |
| Williams Eye Institute IN | Healthcare & Social Assistance | 0 | — | F |
| Williams Fabrication VA | Manufacturing | 0 | — | A |
| Williams Fence of CNY Inc NY | Construction | 0 | — | A |
| Williams Field Services Group LLC CO | — | 0 | — | — |
