| Uhuru Estates Limited | Real estate | 2013 |
| UHY Wingfield Slater Limited | Professional & scientific | 2012 |
| Uioh Limited | Extraterritorial | 1980 |
| UIS Community Gym - CIC | Arts & recreation | 2020 |
| UJ Hygiene & Therapy Ltd | Health & social care | 2022 |
| UK 200 Consulting Limited | Extraterritorial | 1997 |
| UK 200 Financial Services Limited | Extraterritorial | 1988 |
| UK 200 Limited | Extraterritorial | 1988 |
| UK A.J.S Ltd | Construction | 2019 |
| UK Bamer Care Providers Consortium Limited | Health & social care | 2023 |
| UK Brick Show Ltd | Wholesale & retail | 2023 |
| UK Britannia Haulage Limited | Transport & logistics | 2010 |
| UK Bullion Trading Limited | Wholesale & retail | 2020 |
| UK Calligraphy & Painting Art Academy | Manufacturing | 2016 |
| UK Care Recruitment Limited | Health & social care | 2019 |
| UK Cash 4 ANY Car Ltd | Wholesale & retail | 2021 |
| UK Charcoal Grill Ltd | Hospitality | 2025 |
| UK Charcoal Grill Restaurant Ltd | Hospitality | 2026 |
| UK Clays Ltd | Wholesale & retail | 2025 |
| UK Congolese Diaspora Consortium Limited | Wholesale & retail | 2022 |
| UK Costa Ltd | Information & communication | 2025 |
| UK Development Financing Ltd | Financial services | 2025 |
| UK Diamonds Estates Limited | Real estate | 2024 |
| UK Digital (My) Limited | Wholesale & retail | 2015 |
| UK Donovan Ltd | Information & communication | 2016 |
| UK Driveways Ltd | Construction | 2022 |
| UK Education & Immigration Solutions Ltd | Education | 2016 |
| UK Electroplating Ltd | Manufacturing | 2014 |
| UK EU Future Ltd | Professional & scientific | 2021 |
| UK Event Medical Services Limited | Health & social care | 2002 |
| UK F20 Ltd | Health & social care | 2016 |
| UK Frontier Technologies Ltd | Other services | 2018 |
| UK Furniture Import & Export Ltd | Wholesale & retail | 2018 |
| UK Galvanizing Limited | Manufacturing | 2014 |
| UK Garage S2 Ltd | Wholesale & retail | 2017 |
| UK Glazing Systems Ltd | Construction | 2021 |
| UK Graphic Design Ltd | Other services | 2018 |
| UK Healthcare Limited | Financial services | 2003 |
| UK Home School Ltd | Education | 2025 |
| UK Installation Limited | Construction | 2016 |
| UK Instant Times Ltd | Professional & scientific | 2025 |
| UK Kidz Solutions Ltd | Education | 2012 |
| UK Laser Clinics Ltd | Administrative & support | 2015 |
| UK Legal Club | Other services | 2013 |
| UK Legal Solutions Ltd | Professional & scientific | 2025 |
| UK Life Consultant Ltd | Information & communication | 2022 |
| UK Link Services Ltd | Other services | 2019 |
| UK Machine Knives Limited | Wholesale & retail | 2006 |
| UK MED 1 Limited | Financial services | 2016 |
| UK Metal Finishing Ltd | Extraterritorial | 2015 |
| UK Mint Motor Ltd | Wholesale & retail | 2022 |
| UK Monitored Services Ltd | Administrative & support | 2022 |
| UK Nationality Ltd | Professional & scientific | 2025 |
| UK Nomad's CUP Ltd | Hospitality | 2026 |
| UK Ondrive Limited | Information & communication | 2026 |
| UK Panthers Ltd | Information & communication | 2014 |
| UK Pharmacy Ltd | Wholesale & retail | 2013 |
| UK Prestige Building Service Company Ltd | Real estate | 2022 |
| UK Rail Logistics Ltd | Transport & logistics | 2025 |
| UK Removal Services Ltd | Transport & logistics | 2026 |
| UK Responsible Person (Ukrp) Limited | Administrative & support | 2022 |
| UK Security Estates Ltd | Administrative & support | 2023 |
| UK Security Power Ltd | Administrative & support | 2023 |
| UK Soft Drinks Ltd | Manufacturing | 2024 |
| UK Steel Enterprise Limited | Financial services | 1954 |
| UK Sublimation Limited | Wholesale & retail | 2012 |
| UK Surgical Limited | Administrative & support | 2011 |
| UK Swift Visa Solutions Ltd | Professional & scientific | 2024 |
| UK Ta-Tetis Limited | Professional & scientific | 2026 |
| UK TOR Limited | Health & social care | 2023 |
| UK Transport 2020 Limited | Transport & logistics | 2025 |
| UK Underfloor Heating Ltd | Wholesale & retail | 2002 |
| UK Unicorn Trade Limited | Wholesale & retail | 2023 |
| UK Vape Guyz Ltd | Wholesale & retail | 2017 |
| UK Waxworms Limited | Agriculture & fishing | 2010 |
| UK Weld Ltd | Manufacturing | 2021 |
| UK Wide Logistics Ltd | Transport & logistics | 2025 |
| UK Wiring Limited | Construction | 2016 |
| UK Workspace Limited | Construction | 2003 |
| UK Yields Limited | Real estate | 2020 |
| Uk's NO 1 Company Ltd | Other services | 2000 |
| UK200 Group Limited | Other services | 2017 |
| Ukav Ltd | Manufacturing | 2022 |
| Ukems Holdings Ltd | Financial services | 2024 |
| Ukhealthhouse Ltd | Wholesale & retail | 2018 |
| Ukkin Ltd | Information & communication | 2025 |
| UKL Trades Limited | Administrative & support | 2013 |
| Ukoms (Medical) Ltd | Health & social care | 2011 |
| UKQ8 Consultant Ltd | Professional & scientific | 2025 |
| Ukrp Training Ltd | Professional & scientific | 2026 |
| Uktoolsandfasteners Ltd | Manufacturing | 2020 |
| Uliance Ltd | Information & communication | 2019 |
| Ulley Holdings Limited | Financial services | 2018 |
| Ulma Packaging Limited | Administrative & support | 2002 |
| Ulmas Estates Ltd | Real estate | 2022 |
| Ulterior Motive Limited | Professional & scientific | 2024 |
| Ultima Realty Ltd | Real estate | 2022 |
| Ultima Software Ltd | Information & communication | 2015 |
| Ultimate Engineering Limited | Manufacturing | 2010 |
| Ultimate Fitness 4 U Limited | Professional & scientific | 2011 |