| United Airlines (Ronald Reagan Washington National Airport) VA | — | 0 | — | — |
| United Airlines (Washington Dulles International Airport) VA | — | 0 | — | — |
| United Airlines - LAX CA | — | 0 | — | — |
| United Airlines - MSY LA | — | 0 | — | — |
| United Airlines - SFO CA | — | 0 | — | — |
| United Airlines - Update 1 CO | — | 0 | — | — |
| United Airlines Airport Operations DIV MI | — | 0 | — | — |
| United Airlines Update CO | — | 0 | — | — |
| United Airlines, Inc - Cleveland Hopkins International Airport OH | — | 0 | — | — |
| United Airlines, Inc. CT | — | 0 | — | — |
| United Airlines, Inc. IL | Transportation & Warehousing | 3 | $131,014 | C |
| United Airlines, Inc. NE | — | 0 | — | — |
| United Airlines, Inc. - Cleveland Hopkins International Airport OH | — | 0 | — | — |
| United Airlines, Inc. - John Wayne Airport CA | — | 0 | — | — |
| United Airlines, Inc. - Los Angeles International Airport CA | — | 0 | — | — |
| United Airlines, Inc. - San Diego International Airport CA | — | 0 | — | — |
| United Airlines, Inc. - San Francisco International Airport CA | — | 0 | — | — |
| United Airlines, Inc. dba Flight Operations division IL | — | 0 | — | — |
| United Airlines, Inc. Ft. Lauderdale-Hollywood Int'l Air FL | — | 0 | — | — |
| United Airlines, Inc. Jacksonville International Airport FL | — | 0 | — | — |
| United Airlines, Inc. Miami International Airport Concourse G FL | — | 0 | — | — |
| United Airlines, Inc. Palm Beach International Airport FL | — | 0 | — | — |
| United Airlines, Inc. Revised (7/31/20) IN | — | 0 | — | — |
| United Airlines, Inc. Tampa International Airport FL | — | 0 | — | — |
| United Airlines, Inc.'s Airport Operations Division RI | — | 0 | — | — |
| United Airlines, Inc.-Passanger Revenue Accounting TX | — | 0 | — | — |
| United Airlines, Philadelphia International Airport PA | — | 0 | — | — |
| United Airlines, Pittsburgh International Airport PA | — | 0 | — | — |
| United Airlines- Updated CO | — | 0 | — | — |
| United Aline Services Inc NY | Finance & Insurance | 1 | $66,000 | — |
| United Alloy IL | Manufacturing | 0 | — | F |
| United Alloy Inc. TX | Manufacturing | 0 | — | F |
| United Alloy Inc. WI | Manufacturing | 0 | — | F |
| United Aluminum Corporation CT | Manufacturing | 0 | — | F |
| United Ambulance Service ME | Healthcare & Social Assistance | 0 | — | F |
| United America Systems, Inc. FL | Professional & Technical Services | 2 | $106,531 | — |
| United American Energy KY | Mining & Extraction | 0 | — | A |
| United American Marketing IL | Professional & Technical Services | 0 | — | F |
| United Ammunition Container TN | Manufacturing | 0 | — | D |
| United AMS , LLC NV | Finance & Insurance | 1 | $119,995 | — |
| United Apollo Petroleum Transportation Corp NY | Transportation & Warehousing | 0 | — | F |
| United Arab Shipping Company (UASC) VA | — | 0 | — | — |
| United Architectural Metals OH | Construction | 0 | — | D |
| United Assets Services, Inc. AZ | Construction | 0 | — | F |
| United Auto Supply NY | Wholesale Trade | 0 | — | F |
| United Auto Supply of Syracuse West Inc NY | Wholesale Trade | 0 | — | F |
| United Aviation Accessories,Inc. TX | Manufacturing | 0 | — | F |
| United Bakery & Co CA | Manufacturing | 0 | — | F |
| United Baking NY | Manufacturing | 0 | — | F |
| United Bancorp, Inc OH | Management of Companies | 0 | — | A |
