| United States Seafoods WA | Manufacturing | 0 | — | F |
| United States Soccer Federation, Inc. IL | Other Services | 1 | $100,000 | A |
| United States Steel Corporation AL | Manufacturing | 0 | — | C |
| United States Steel Corporation IL | Manufacturing | 0 | — | F |
| United States Steel Corporation IN | Manufacturing | 0 | — | A |
| United States Steel Corporation MI | Manufacturing | 0 | — | C |
| United States Steel Corporation PA | Manufacturing | 5 | $127,397 | C |
| United States Steel Corporation Gary Works Plant IN | — | 0 | — | — |
| United States Steel Corporation Lorain OH | — | 0 | — | — |
| United States Steel Corporation Revised (10/7/19) IN | — | 0 | — | — |
| United States Sugar Savannah Refinery LLC GA | Manufacturing | 0 | — | B |
| United States Sugar Savannah Refinery LLC KY | Manufacturing | 0 | — | A |
| United States Tape & Label Corp MO | Manufacturing | 0 | — | A |
| United States Technologies Communications Corp NJ | Information & Media | 0 | — | F |
| United States Technologies Communications Corp TX | Information & Media | 0 | — | F |
| United States Traffic Network, LLC PA | — | 0 | — | — |
| United States Welding Inc. d.b.a. Rocky Mountain Air Solutions UT | Wholesale Trade | 0 | — | F |
| United States Welding, Inc. dba Rocky Mountain Air Solutions CO | Wholesale Trade | 0 | — | F |
| United States Welding, Inc. dba Rocky Mountain Air Solutions UT | Wholesale Trade | 0 | — | A |
| United States Whip, Inc. OK | Manufacturing | 0 | — | A |
| United Steel and Fasteners, Inc IL | Manufacturing | 0 | — | F |
| United Steel Inc. CT | Manufacturing | 0 | — | F |
| United Steel Service, LLC OH | Wholesale Trade | 0 | — | D |
| United Steel Works, Inc. FL | Manufacturing | 0 | — | C |
| United Stone and Site, Inc. MA | Construction | 0 | — | F |
| United Structural Systems, Inc TN | Construction | 0 | — | F |
| United Structural Works Inc. NY | Construction | 2 | $78,208 | — |
| United Structures of America TX | — | 0 | — | — |
| UNITED STRUCTURES OF GEORGIA, LLC GA | Construction | 0 | — | A |
| United Summit Center WV | Healthcare & Social Assistance | 0 | — | D |
| United Summit Center Psychiatric Care Unit WV | Healthcare & Social Assistance | 0 | — | A |
| United Supermarkets LLC NM | Retail Trade | 0 | — | A |
| United Supermarkets LLC TX | Retail Trade | 0 | — | C |
| United Support Solutions-LMT NJ | Manufacturing | 0 | — | F |
| United Surface Finishing OH | Manufacturing | 0 | — | F |
| United Surface Solutions, LLC GA | — | 0 | — | — |
| United Surgical Partners Int'l, Inc. 13230 Nacogdoches TX | Healthcare & Social Assistance | 0 | — | A |
| United Surgical Partners International TX | Healthcare & Social Assistance | 0 | — | A |
| United Synthetics Inc GA | Manufacturing | 0 | — | B |
| United Systems Mechanical, LLC WA | Construction | 0 | — | A |
| United Talent Agency, LLC CA | — | 0 | — | — |
| United Team Mechanical UT | Construction | 0 | — | A |
| United Techno Solutions, Inc. CA | Professional & Technical Services | 6 | $148,667 | — |
| United Technologies TN | — | 0 | — | — |
| United Technologies Corporation CA | — | 0 | — | — |
| United Technologies Corporation (formerly Goodrich) NY | — | 0 | — | — |
| United Technologies Electronic Controls IN | — | 0 | — | — |
| UNITED TEKINFO HUB LLC. TX | Professional & Technical Services | 2 | $79,577 | — |
| United Temps Inc. MA | Administrative & Waste Services | 0 | — | F |
| United Temps PEO IL | Other Services | 0 | — | F |
