| Union Tank Car NE | — | 0 | — | — |
| Union Tank Car Co. GA | Transportation & Warehousing | 0 | — | C |
| Union Tank Car Co.-Houston TX | — | 0 | — | — |
| Union Tank Car Company KS | Transportation & Warehousing | 0 | — | C |
| Union Tank Car Company LA | Manufacturing | 0 | — | F |
| Union Tank Car Company OH | Transportation & Warehousing | 0 | — | D |
| Union Tank Car Company TX | Transportation & Warehousing | 0 | — | C |
| Union Tank Car Company WY | Transportation & Warehousing | 0 | — | A |
| Union Tech Co., KKC TX | Manufacturing | 0 | — | A |
| Union Tech Inc. TX | Manufacturing | 2 | $130,000 | — |
| Union Telephone Company WY | Information & Media | 0 | — | D |
| UNION TEMPORARY SERVICES, INC. FL | Administrative & Waste Services | 0 | — | C |
| Union Tool Corp IN | Manufacturing | 0 | — | A |
| Union Underwear Co. LA | — | 0 | — | — |
| Union Underwear Co., Inc. d/b/a Fruit of the Loom KY | — | 0 | — | — |
| Union Underwear Company, Inc. KY | Transportation & Warehousing | 3 | $96,992 | A |
| Union Underwear Company, Inc. SC | Transportation & Warehousing | 0 | — | A |
| Union Underwear Company/ Fruit of The Loom KY | — | 0 | — | — |
| Union Volunteer Emergency Squad, Inc. NY | Healthcare & Social Assistance | 0 | — | D |
| Union Wholesale Company DE | Wholesale Trade | 0 | — | A |
| Unionport Constructors JV NY | Construction | 0 | — | F |
| Unipart Services America FL | Transportation & Warehousing | 0 | — | B |
| Unipart Services America GA | Transportation & Warehousing | 0 | — | A |
| Unipart Services America IL | Transportation & Warehousing | 0 | — | A |
| Unipart Services America NJ | Transportation & Warehousing | 0 | — | A |
| Uniparts Olsen, Inc. IA | Manufacturing | 0 | — | F |
| Unipharm, Inc. CT | Manufacturing | 0 | — | A |
| Uniphase, Inc. IL | Manufacturing | 0 | — | B |
| Uniphore Technologies North America, Inc. CA | Professional & Technical Services | 9 | $204,311 | — |
| Uniplex Construction WA | Construction | 0 | — | F |
| Unipower Technology, LLC TN | — | 0 | — | — |
| Unipower, LLC TN | — | 0 | — | — |
| Unipres TN | Transportation & Warehousing | 0 | — | A |
| Unipres Alabama Inc. AL | Manufacturing | 0 | — | D |
| Unipres Southeast MS | Manufacturing | 0 | — | F |
| UNIPRES USA INC TN | Manufacturing | 0 | — | D |
| Uniprime Resources, Inc. NJ | Professional & Technical Services | 1 | $80,717 | — |
| UniPro Foodservice, Inc. GA | Wholesale Trade | 0 | — | A |
| UniProAir NJ | Construction | 0 | — | A |
| Uniq IT Solutions Inc. OH | Professional & Technical Services | 3 | $102,752 | — |
| UNIQLO California LLC CA | — | 0 | — | — |
| UNIQLO USA LLC IL | — | 0 | — | — |
| UNIQUE BUILDING GROUP, INC. CA | Construction | 0 | — | F |
| Unique Building Supplies, LLC GA | Retail Trade | 0 | — | F |
| UNIQUE CARPETS, LTD. CA | Manufacturing | 0 | — | F |
| UNIQUE COMP, INC. NY | Professional & Technical Services | 1 | $160,000 | — |
| UNIQUE COMPUTING LLC IL | Information & Media | 1 | $59,000 | — |
| Unique Custom Exteriors UT | Construction | 0 | — | F |
| UNIQUE DESIGNS INC NJ | Wholesale Trade | 1 | $135,000 | — |
| Unique Electronics, Inc. FL | Manufacturing | 0 | — | A |
