| United Maintenance Company, Inc. IL | Administrative & Waste Services | 0 | — | F |
| United Maintenance Company, Inc. MD | Administrative & Waste Services | 0 | — | A |
| United Malt Group ID | Manufacturing | 0 | — | A |
| United Malt WDC Asheville NC | Transportation & Warehousing | 0 | — | A |
| United Malt WDC Champlain NY | Transportation & Warehousing | 0 | — | A |
| United Malt WDC Oakland CA | Transportation & Warehousing | 0 | — | A |
| United Malt WDC San Diego CA | Transportation & Warehousing | 0 | — | A |
| United Malt WDC Vancouver Washington WA | Transportation & Warehousing | 0 | — | A |
| United Manufacturing Inc. KS | Manufacturing | 0 | — | F |
| United Markets CA | Retail Trade | 0 | — | F |
| United Masonry Incorporated of Virginia VA | Construction | 0 | — | F |
| United Material Handling CA | Construction | 0 | — | F |
| United Materials of Great Falls, Inc. MT | Construction | 0 | — | C |
| United Mechanical NC | Construction | 0 | — | B |
| United Mechanical TX | Construction | 0 | — | A |
| United Mechanical Inc. OK | Construction | 0 | — | F |
| United Mechanical, Inc. WI | Construction | 0 | — | A |
| United Medical Enterprise GA | Manufacturing | 0 | — | F |
| UNITED MEDICAL INVESTORS MO | Healthcare & Social Assistance | 0 | — | F |
| United Medical Rehabilitation Hospital LA | Healthcare & Social Assistance | 0 | — | F |
| United Medical Response LLC IL | Healthcare & Social Assistance | 0 | — | F |
| UNITED MEDICAL SYSTEMS MA | Healthcare & Social Assistance | 0 | — | C |
| United Medical Transport PA | Healthcare & Social Assistance | 0 | — | F |
| United Memorial Medical Center NY | Healthcare & Social Assistance | 3 | $198,876 | — |
| United Metals, LLC ID | Administrative & Waste Services | 0 | — | B |
| United Meters, Inc. IL | Construction | 0 | — | D |
| United Methodist Communities - The Shores NJ | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Homes CT | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Homes NY | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Homes PA | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Homes of New Jersey d/b/a United Methodist Communities NJ | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Homes, Inc. DBA Aldersgate Village KS | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Publishing House TN | — | 0 | — | — |
| United Methodist Retirement Homes NC | Healthcare & Social Assistance | 0 | — | F |
| United Methodist Village Retirement Communities Inc. IL | Healthcare & Social Assistance | 0 | — | F |
| UNITED METRO ENERGY CORP NY | Wholesale Trade | 0 | — | B |
| United Minerals & Properties DBA Cimbar Performance Minerals GA | Manufacturing | 0 | — | A |
| United Mirror & Glass TX | Construction | 0 | — | D |
| United Miscellaneous & Ornamental Steel Inc. CA | Construction | 0 | — | F |
| United National Maintenance Inc CA | Administrative & Waste Services | 0 | — | F |
| United National Maintenance Inc NV | Administrative & Waste Services | 0 | — | D |
| United National Maintenance Inc. FL | Administrative & Waste Services | 0 | — | F |
| United National Maintenance Inc. GA | Administrative & Waste Services | 0 | — | F |
| United National Maintenance Inc. LA | Administrative & Waste Services | 0 | — | A |
| United National Maintenance Inc. MD | Administrative & Waste Services | 0 | — | A |
| United National Maintenance Inc. NY | Administrative & Waste Services | 0 | — | F |
| United Nations Federal Credit Union NY | Finance & Insurance | 4 | $124,857 | — |
| United Nations Foundation, Inc. DC | Other Services | 5 | $235,561 | — |
| UNITED NATURAL FOOD INC (UNFI) FL | Wholesale Trade | 0 | — | F |
| United Natural Foods Inc CA | Wholesale Trade | 0 | — | F |
