| W. A. Wilson & Sons, Inc WV | Retail Trade | 0 | - | D |
| W. G. Yates and Sons Construction Co. MS | Construction | 9 | $92,664 | - |
| W. International SC, LLC SC | Manufacturing | 0 | - | F |
| W. L. Gore & Associates Inc. DE | Wholesale Trade | 1 | $144,760 | - |
| W. Lee Flowers & Co., Inc. SC | Wholesale Trade | 0 | - | F |
| W. M. Lyles Co CA | Construction | 0 | - | F |
| W. M. Schlosser CO., INC. MD | Construction | 2 | $126,464 | - |
| W. P. Carey Inc. (Carey Financial, LLC & retail fundraising business) NY | - | 0 | - | - |
| W. P. Carey Management LLC NY | Real Estate | 1 | $108,000 | - |
| W. Pennings & Sons Inc. MI | Construction | 0 | - | F |
| W. S. Townsend Co./DBA MKD Kitchen and Bath MI | Construction | 0 | - | F |
| W. Soule and Company MI | Construction | 0 | - | A |
| W. Sternoff LLC WA | Wholesale Trade | 1 | $66,706 | - |
| W. W. Wood Products, Inc. MO | - | 1 | $77,126 | - |
| W. Y. International Inc. WA | Transportation & Warehousing | 1 | $100,000 | - |
| W.A. Foote Memorial Hospital, Inc. MI | Healthcare & Social Assistance | 3 | $166,602 | - |
| W.A. Foote Memorial Hospital, Inc. MI | - | 2 | $280,000 | - |
| W.A. Kendall and Co., LLC GA | Administrative & Waste Services | 0 | - | B |
| W.A. Rasic Construction Company, INC. CA | Professional & Technical Services | 1 | $94,994 | - |
| W.A. Thompson CA | - | 0 | - | - |
| W.A. Thompson-Barstow CA | - | 0 | - | - |
| W.A. Thompson-Mojave CA | - | 0 | - | - |
| W.B. Guimarin SC | Construction | 0 | - | F |
| W.D.Young & Sons, Cocopah Nurseries Inc CA | - | 0 | - | - |
| W.E.Bowers & Associates Inc MD | Construction | 0 | - | F |
| W.F. Delauter & Son, Inc. MD | - | 0 | - | - |
| W.G. Cells WA | - | 0 | - | - |
| W.G. Tomko Inc. PA | Construction | 0 | - | B |
| W.G. Yates and Sons Construction Co. MS | Construction | 3 | $80,309 | - |
| W.H. Braum, Inc. OK | Manufacturing | 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. Rice University TX | Educational Services | 50 | $164,186 | - |
| W.M. Rice University TX | - | 31 | $79,000 | - |
| W.M. Sprinkman WI | - | 0 | - | - |
| W.O. Blackstone & Co., Inc. SC | Construction | 0 | - | F |
| W.R. Case & Sons Cutlery Company PA | Manufacturing | 0 | - | F |
| W.R. Grace & CO. MD | Professional & Technical Services | 4 | $166,236 | A |
| W.R. Grace & CO. MD | - | 2 | $138,619 | - |
| W.R. Meadows Inc IL | Manufacturing | 0 | - | F |
| W.S Darley WI | Manufacturing | 0 | - | B |
| W.S. Badcock Corporation FL | Retail Trade | 0 | - | F |
| W.S.C. Sports Technologies, Inc. NY | - | 1 | $125,000 | - |
| W.T. Walker Group WI | Manufacturing | 0 | - | C |
| W.W. Grainger CA | Wholesale Trade | 0 | - | B |
| W.W. Grainger KY | Wholesale Trade | 0 | - | D |