| Umlnb 24 Limited | Transport & logistics | 2023 |
| Umlnb 29 Limited | Transport & logistics | 2023 |
| Umlnb 30 Limited | Transport & logistics | 2023 |
| Umlnb 31 Limited | Transport & logistics | 2024 |
| Umlnb 32 Limited | Transport & logistics | 2024 |
| Umlnb 34 Limited | Transport & logistics | 2024 |
| Umlnb 35 Limited | Transport & logistics | 2024 |
| Umlnb 36 Limited | Transport & logistics | 2024 |
| Umlnb 38 Limited | Transport & logistics | 2025 |
| Umlnb 39 Limited | Transport & logistics | 2025 |
| Umlnb 40 Limited | Transport & logistics | 2025 |
| Umlnb 41 Limited | Transport & logistics | 2026 |
| Umlnb 42 Limited | Transport & logistics | 2025 |
| Umlnb 43 Limited | Transport & logistics | 2026 |
| Umlnb 44 Limited | Transport & logistics | 2026 |
| Umlnb 45 Limited | Transport & logistics | 2026 |
| Umlnb 46 Limited | Transport & logistics | 2026 |
| Umlnb 47 Limited | Transport & logistics | 2026 |
| Umlnb 48 Limited | Transport & logistics | 2026 |
| Umlnb 49 Limited | Transport & logistics | 2026 |
| Umlnb 5 Limited | Administrative & support | 2019 |
| Umlnb 50 Limited | Transport & logistics | 2026 |
| Umlnb 51 Limited | Transport & logistics | 2026 |
| Umlnb 52 Limited | Transport & logistics | 2026 |
| Umlnb 53 Limited | Transport & logistics | 2026 |
| Umlnb 54 Limited | Transport & logistics | 2026 |
| Umlnb 6 Limited | Administrative & support | 2019 |
| Umlnb Holdings Limited | Administrative & support | 2019 |
| Umnr Trading Limited | Transport & logistics | 2025 |
| UMS Properties Limited | Real estate | 2017 |
| Unchained Group Ltd | Information & communication | 2023 |
| Unchyou.Uk Limited | Wholesale & retail | 2019 |
| Uncut Medium Ltd | Information & communication | 2018 |
| Uneek Wheels Ltd | Wholesale & retail | 2021 |
| Unicraft Solutions Ltd | Construction | 2023 |
| Unified Dental Ltd | Health & social care | 2023 |
| Uniform Outlet Ltd | Wholesale & retail | 2015 |
| Union Africa Capital Limited | Administrative & support | 2025 |
| Union Carriers Limited | Transport & logistics | 2016 |
| Union Commercial Services Limited | Administrative & support | 2016 |
| Union Consortium Limited | Transport & logistics | 2018 |
| Union Crude Carriers Holdings Limited | Transport & logistics | 2018 |
| Union Crude Carriers Limited | Transport & logistics | 2018 |
| Union Fruit (UK) Limited | Wholesale & retail | 2009 |
| Union Glory Limited | Transport & logistics | 2008 |
| Union Investcorp Limited | Administrative & support | 2008 |
| Union Marine Services Limited | Transport & logistics | 2019 |
| Union Maritime Holdings Limited | Administrative & support | 2017 |
| Union Maritime Limited | Transport & logistics | 2006 |
| Union Maritime Services Limited | Transport & logistics | 2022 |
| Union Park Grocers Ltd | Wholesale & retail | 2025 |
| Union Traders Ltd | Wholesale & retail | 2025 |
| Unique Centre Ltd | Real estate | 2010 |
| Unique Cutz Ltd | Other services | 2021 |
| Unique Financial Consultants Ltd | Real estate | 2013 |
| Unique Property London Ltd | Real estate | 2026 |
| Unique Real Estates (UK ) Ltd | Real estate | 2013 |
| Unique Real Estates and Investments Ltd | Real estate | 2021 |
| Uniquemobileservices Ltd | Other services | 2016 |
| Unisive Ltd | Professional & scientific | 2025 |
| Unit 23 Spaces Management Ltd | Real estate | 2018 |
| Unite Innovation Ltd | Information & communication | 2026 |
| Unite Properties Limited | Real estate | 2025 |
| United Against Racism and Sectarianism Ltd | Education | 2025 |
| United Commercial Properties Limited | Professional & scientific | 1986 |
| United Facilities Limited | Wholesale & retail | 2015 |
| United Food Distribution Ltd | Wholesale & retail | 2025 |
| United Goans Limited | Arts & recreation | 2018 |
| United Gulf Education Ltd | Education | 2024 |
| United Kicks Ltd | Wholesale & retail | 2021 |
| United Kingdom Logistics Consultants Limited | Wholesale & retail | 2024 |
| United London Motors Ltd | Wholesale & retail | 2019 |
| United Medieval UK Ltd | Wholesale & retail | 2025 |
| United Mice Travel Service UK Ltd | Administrative & support | 2016 |
| United Motors Limited | Wholesale & retail | 2024 |
| United Painting Ltd | Construction | 2026 |
| United Pouch Pack UK Ltd | Administrative & support | 2026 |
| United Star Foods Limited | Hospitality | 2023 |
| United Watches Ltd | Wholesale & retail | 2025 |
| Unitrust Properties Limited | Real estate | 2015 |
| Unitrust Protection Services (U.K.) Limited | Administrative & support | 1977 |
| Unity Business Limited | Wholesale & retail | 2015 |
| Unity London Limited | Wholesale & retail | 2019 |
| Unity N Diversity Ltd | Administrative & support | 2025 |
| Unity Property Ventures Limited | Real estate | 2021 |
| Universal Express Services Ltd | Wholesale & retail | 2019 |
| Universal Hospitality Group Limited | Professional & scientific | 2025 |
| Universal Immigration Limited | Professional & scientific | 2021 |
| Universal Procure Ltd. | Manufacturing | 2015 |
| Universal Refrigeration Limited | Other services | 2002 |
| Universal Refrigeration Services Limited | Real estate | 1999 |
| Universal Reservations Ltd | Administrative & support | 2013 |
| Universal Training Solutions (London) Ltd | Education | 2020 |
| University Campus of Football Business Limited | Education | 2010 |
| Unkwn Creative Community Ltd | Arts & recreation | 2024 |
| Unkwn Ltd | Professional & scientific | 2024 |
| Unmarked London Limited | Wholesale & retail | 2024 |
| Unonect Ltd | Professional & scientific | 2021 |
| Unstoppable DE Beaute Limited | Wholesale & retail | 2021 |
| Unstoppable Records International Limited | Information & communication | 2018 |