| United Helpers Care, Inc. NY | Healthcare & Social Assistance | 0 | — | F |
| United Helpers Management Company NY | Administrative & Waste Services | 0 | — | D |
| United Hoist Equipment, Inc. FL | Construction | 0 | — | A |
| United Holdings AR | Wholesale Trade | 0 | — | A |
| United Holdings LA | Wholesale Trade | 0 | — | F |
| United Holdings OK | Manufacturing | 0 | — | D |
| United Holdings TX | Wholesale Trade | 0 | — | D |
| United Home Health Services, Inc. MI | Healthcare & Social Assistance | 1 | $124,800 | — |
| United Hospital Center, Inc. WV | Healthcare & Social Assistance | 3 | $555,840 | — |
| United Hospital District MN | Healthcare & Social Assistance | 0 | — | A |
| United Hospital Services, LLC IN | Other Services | 0 | — | D |
| United HR Direct IA | — | 0 | — | — |
| United Industrial Service Inc MA | Real Estate | 0 | — | F |
| United Industrial Textile Products MA | Manufacturing | 0 | — | C |
| United Industries Corporation MO | Manufacturing | 0 | — | F |
| United Industries Group, Inc. CA | Manufacturing | 0 | — | A |
| United Industries, Inc. AR | Manufacturing | 0 | — | F |
| United Info Services Inc IL | Professional & Technical Services | 3 | $118,697 | — |
| United Infrastructure Group, Inc SC | Construction | 0 | — | C |
| United Initiators, Inc OH | Manufacturing | 0 | — | F |
| United Initiators, Inc. AR | Manufacturing | 0 | — | B |
| United Integrated Services (USA) Corp. AZ | Professional & Technical Services | 4 | $470,467 | B |
| UNITED INTERIOR SERVICE, INC NY | Administrative & Waste Services | 0 | — | F |
| United Investors Limited Partnership TX | Healthcare & Social Assistance | 0 | — | F |
| United IT Solutions, Inc TX | Professional & Technical Services | 20 | $101,305 | — |
| United Jewish Council of the East Side, Inc NY | Healthcare & Social Assistance | 1 | $64,418 | — |
| United Knitting LP TN | — | 0 | — | — |
| UNITED KS HOLDING LLC TX | Retail Trade | 1 | $57,000 | — |
| United Laboratories Manufacturing LLC TX | Manufacturing | 0 | — | F |
| United Laboratories, Inc. IL | Manufacturing | 0 | — | A |
| UNITED LAND SERVICES FL | Administrative & Waste Services | 0 | — | A |
| United Language Group TX | — | 0 | — | — |
| United Language Group, Inc. CA | — | 0 | — | — |
| United Launch Alliance AL | Manufacturing | 0 | — | A |
| United Launch Alliance CA | Transportation & Warehousing | 0 | — | A |
| United Launch Alliance CO | Manufacturing | 0 | — | A |
| United Launch Alliance FL | Transportation & Warehousing | 0 | — | B |
| United Launch Alliance TX | Manufacturing | 0 | — | F |
| United Launch Alliance (Ula) CA | — | 0 | — | — |
| United Laundry Services LLC HI | — | 0 | — | — |
| United Legwear CA | Wholesale Trade | 0 | — | F |
| United Legwear NJ | Wholesale Trade | 0 | — | C |
| United Lens Company, Inc. MA | Manufacturing | 0 | — | F |
| United Liquid Waste Recycling Inc. WI | Administrative & Waste Services | 0 | — | D |
| United Litho, Inc. VA | — | 0 | — | — |
| United Living Community SD | Healthcare & Social Assistance | 0 | — | C |
| United Lumber & Reman, LLC AL | Manufacturing | 0 | — | F |
| United Lutheran Program for the Aging dba Luther Manor WI | Healthcare & Social Assistance | 0 | — | F |
| United Maintenance Company, Inc. CA | Administrative & Waste Services | 0 | — | F |
| United Maintenance Company, Inc. FL | Administrative & Waste Services | 0 | — | F |
