| UEFA Club Competitions Online Store |
| Uganda National English Language Teachers’ Association (UNELTA) |
| UK Research and Innovation [UKRI] |
| Ukrainian Institute London |
| Ulster Bank |
| Ultra Glow Cosmetics Ltd |
| Umbrellium Limited |
| Underground Poems CIC |
| Uni-Technologies Sdn.Bhd |
| Unibel |
| Unilever |
| Unilever Home & Personal Care Division |
| Unilever N.V. |
| Unilever PLC |
| Unilever UK Ltd |
| Unilever United Stated Inc |
| Unilux |
| Union des Associations Européennes de Football (UEFA) |
| Union Education Group |
| Union Hand Roasted Coffee |
| Unique Financial Planning Ltd. |
| United Biscuits |
| United Nations Educational, Scientific and Cultural Organization (UNESCO) |
| United Parcel Service, Inc |
| United Utilities Group plc |