| U F Manufacturing Ltd | Manufacturing | 2023 |
| U Fit Group Limited | Professional & scientific | 2016 |
| U Fit Mini Limited | Health & social care | 2021 |
| U Fit Online Limited | Arts & recreation | 2018 |
| U Fit Studio (Leicester) Limited | Arts & recreation | 2016 |
| U Fit Wellness Limited | Extraterritorial | 2021 |
| U H Estates Limited | Real estate | 2024 |
| U Motor Traders Ltd | Wholesale & retail | 2022 |
| U P Enterprises (Imports) Limited | Wholesale & retail | 2015 |
| U P Gardens Limited | Real estate | 2017 |
| U R Electrical Installations Limited | Construction | 2018 |
| U T T Holdings Ltd | Financial services | 2024 |
| U T T Limited | Manufacturing | 1995 |
| U Talent Ltd | Administrative & support | 2024 |
| U Tea CHA Leicester Limited | Hospitality | 2016 |
| U V Ventures Ltd | Wholesale & retail | 2010 |
| U&D Properties Ltd | Real estate | 2024 |
| U&K Developments Ltd | Real estate | 2024 |
| U-Babe (UK) Limited | Real estate | 1999 |
| U. B. Co (UK) Ltd | Administrative & support | 2007 |
| U3 Trading Limited | Wholesale & retail | 2025 |
| UAA Distributions Ltd | Wholesale & retail | 2024 |
| UAB Limited | Professional & scientific | 2017 |
| UAV Tactical Systems Limited | Manufacturing | 2004 |
| UB Enterprises Limited | Professional & scientific | 2019 |
| UB Fulfilment Limited | Transport & logistics | 2025 |
| UB Techno UK Ltd | Wholesale & retail | 2025 |
| UB Worldwide Ltd | Wholesale & retail | 2022 |
| Ubbergloves Ltd | Administrative & support | 2016 |
| UBBESTON700 Limited | Administrative & support | 2015 |
| Ubeeqo UK Limited | Professional & scientific | 2011 |
| Ubergeek Ltd | Other services | 2011 |
| Ubertas Care Homes Limited | Health & social care | 2021 |
| Uberthwaite Quality Ltd | Transport & logistics | 2015 |
| Ubhi Leisure Ltd | Hospitality | 2017 |
| Ubiquitree Limited | Information & communication | 2022 |
| UBM Financial Services Ltd | Financial services | 2019 |
| Ubuntu Enterprise AHA Ltd | Wholesale & retail | 2025 |
| Ubuntu Enterprise Stabana Ltd | Other services | 2026 |
| Ubuuru Limited | Arts & recreation | 2021 |
| UCI Self Storage Limited | Transport & logistics | 2011 |
| UCL Holdings Limited | Real estate | 2015 |
| UCN Care Services Ltd | Health & social care | 2022 |
| Ucopia Investments Ltd | Financial services | 2020 |
| Uday Modhwadia Ltd | Education | 2026 |
| UF Holdings Ltd | Real estate | 2022 |
| UFS Investments Ltd | Real estate | 2024 |
| Ufton Experts Ltd | Transport & logistics | 2014 |
| UG - Unity Group Ltd | Hospitality | 2018 |
| Ugam Enterpriese Ltd | Wholesale & retail | 2026 |
| Ugee Prime Limited | Manufacturing | 2026 |
| Ugharani Ltd | Financial services | 2024 |
| UGT World Trading Ltd | Wholesale & retail | 2023 |
| UH Leicester (UK) Limited | Real estate | 2024 |
| Uhhk UK Limited Limited | Wholesale & retail | 2024 |
| UHS Investments Ltd | Real estate | 2022 |
| UIA Logistics Ltd | Transport & logistics | 2023 |
| UJ Enterprises Ltd | Wholesale & retail | 2023 |
| UK - Coaches Limited | Wholesale & retail | 2012 |
| UK : EV Limited | Construction | 2018 |
| UK Ackreditering Certification Ltd | Professional & scientific | 2017 |
| UK ALL Fashion Limited | Wholesale & retail | 2026 |
| UK Authentic Goods Ltd | Wholesale & retail | 2026 |
| UK Autoways Ltd | Wholesale & retail | 2017 |
| UK Bridging Finance Limited | Financial services | 2018 |
| UK Bright Education Ltd | Education | 2015 |
| UK Build Works Ltd | Construction | 2012 |
| UK Building Supplies Leic Ltd | Construction | 2021 |
| UK Burger Land Ltd | Hospitality | 2025 |
| UK Cabs Ltd | Transport & logistics | 2023 |
| UK Camper Tours Limited | Administrative & support | 2025 |
| UK Care Staffing Ltd | Administrative & support | 2015 |
| UK Care Training Ltd | Professional & scientific | 2021 |
| UK Clinical Pharmacy Association Limited | Other services | 2019 |
| UK Coach Finance Ltd | Financial services | 2019 |
| UK Coach Sales Ltd | Wholesale & retail | 2019 |
| UK Community Pharmacy Ltd | Real estate | 2011 |
| UK Computer Services Ltd | Other services | 2007 |
| UK CRE8 Ltd | Construction | 2025 |
| UK Deluxe Collection Limited | Wholesale & retail | 2015 |
| UK Drainage Claims Limited | Administrative & support | 2009 |
| UK DRY Flower Florist Ltd | Wholesale & retail | 2026 |
| UK Ecig Station Limited | Wholesale & retail | 2017 |
| UK Education Insight Ltd | Information & communication | 2017 |
| UK Energy Bureau Ltd | Administrative & support | 2016 |
| UK Enterprise Consultants Ltd | Professional & scientific | 2009 |
| UK EV & Solar Ltd | Construction | 2025 |
| UK EV and Solar Elevations Limited | Construction | 2025 |
| UK EV Wholesale Ltd | Wholesale & retail | 2025 |
| UK Fashion Group Limited | Manufacturing | 2024 |
| UK FD Ltd | Professional & scientific | 2017 |
| UK Firestop Inspections Limited | Professional & scientific | 2016 |
| UK Firestop Solutions Limited | Construction | 2025 |
| UK Foil and Plastics Limited | Wholesale & retail | 2025 |
| UK Frameworks Limited | Professional & scientific | 2015 |
| UK Grand Ltd | Real estate | 2018 |
| UK Groupe Ltd | Wholesale & retail | 2014 |
| UK Groupon Ltd | Wholesale & retail | 2022 |
| UK Guiding Ltd | Transport & logistics | 2026 |
| UK Happy Homes Ltd | Real estate | 2025 |