| W.H. Demmons, Inc. ME | Construction | 0 | — | F |
| W.H. Metcalfe & Sons, Inc MD | Construction | 0 | — | F |
| W.H.O. Manufacturing Co., Inc. CO | Manufacturing | 0 | — | A |
| W.I.S. Logistics WI | Professional & Technical Services | 0 | — | A |
| W.J. FISHERFOODS INC IL | Retail Trade | 0 | — | F |
| W.J. O'Neil Company MI | Construction | 0 | — | B |
| W.K. Upchurch Construction Co., Inc. AL | Construction | 0 | — | A |
| W.L. Butler CA | Construction | 0 | — | A |
| W.L. BYRD LUMBER CO.,INC MS | Manufacturing | 0 | — | A |
| W.L. Deckert Co., Inc. WI | Wholesale Trade | 0 | — | F |
| W.L. French Excavating Corp MA | Construction | 0 | — | D |
| W.L. Gore & Associates Inc. AZ | Wholesale Trade | 1 | $142,692 | — |
| W.L. Gore & Associates Inc. DE | Wholesale Trade | 2 | $132,050 | — |
| W.L. Hickey Sons, Inc. CA | Construction | 1 | $85,176 | — |
| W.L. Roenigk, Inc. PA | Transportation & Warehousing | 0 | — | B |
| W.L.A., Inc. NC | Transportation & Warehousing | 0 | — | D |
| W.M. Heitgras Company OK | Wholesale Trade | 0 | — | A |
| W.M. Huber Cabinet Works Inc. IL | Manufacturing | 0 | — | F |
| W.M. Jordan Company VA | Construction | 0 | — | A |
| W.M. Klorman CA | Construction | 0 | — | F |
| W.M. RICE UNIVERSITY TX | Educational Services | 50 | $164,186 | — |
| W.M. Schultz Construction, Inc. NY | Construction | 0 | — | A |
| W.M. Sprinkman WI | — | 0 | — | — |
| W.M. Warr & Son, Inc. NC | Construction | 0 | — | F |
| W.N. Van Alstine & Sons, Inc. NY | Wholesale Trade | 0 | — | A |
| W.O. Blackstone & Co., Inc. SC | Construction | 0 | — | F |
| W.O. Grubb Steel Erection, Incorporated VA | Construction | 0 | — | A |
| W.O.R.M. Ag, Inc. CA | Agriculture & Forestry | 0 | — | A |
| W.P. KEITH COMPANY, INC. CA | Manufacturing | 0 | — | F |
| W.R. CASE & SONS CUTLERY COMPANY PA | Manufacturing | 0 | — | F |
| W.R. Forde Associates, Inc. CA | Construction | 0 | — | F |
| W.R. Grace IL | Manufacturing | 0 | — | A |
| W.R. Grace IN | Manufacturing | 0 | — | A |
| W.R. GRACE & CO. MD | Professional & Technical Services | 4 | $166,236 | A |
| W.R. Grace & Co.-Conn. OR | Manufacturing | 0 | — | A |
| W.R. Grace & Co.-Conn. PA | Manufacturing | 0 | — | A |
| W.R. Meadows Inc IL | Manufacturing | 0 | — | F |
| W.R. Meadows Inc MO | Manufacturing | 0 | — | C |
| W.R. Meadows Inc PA | Manufacturing | 0 | — | A |
| W.R. Meadows Inc TX | Manufacturing | 0 | — | A |
| W.R. Meadows Inc. CA | Manufacturing | 0 | — | D |
| W.R. Meadows Inc. VA | Manufacturing | 0 | — | B |
| W.S Darley WI | Manufacturing | 0 | — | B |
| W.S. Aiken LLC MA | Construction | 0 | — | F |
| W.S. Badcock Corporation FL | Retail Trade | 0 | — | F |
| W.S. Cumby, Inc PA | Construction | 0 | — | F |
| W.S. Darley & Co. IL | Manufacturing | 0 | — | A |
| W.S. Emerian Trucking, Inc. CA | Transportation & Warehousing | 0 | — | A |
| W.T. HUMPHREY, INC NC | Construction | 0 | — | F |
| W.T. Walker Group WI | Manufacturing | 0 | — | C |
