| UK Home Hub Ltd | Wholesale & retail | 2021 |
| UK Home Shopping Limited | Manufacturing | 1999 |
| UK IMA Ltd | Financial services | 2022 |
| UK Imaging Ltd | Health & social care | 2017 |
| UK Impex Ltd | Information & communication | 2008 |
| UK Instant Services Ltd | Administrative & support | 2013 |
| UK Island Store Ltd | Wholesale & retail | 2022 |
| UK Junction Trading Ltd | Wholesale & retail | 2025 |
| UK Make UP Limited | Wholesale & retail | 2011 |
| UK Mallus Studio House Ltd | Information & communication | 2025 |
| UK Maya Consultancy Services Ltd | Professional & scientific | 2021 |
| UK Mech Ltd | Manufacturing | 2018 |
| UK Media & Consulting Ltd | Professional & scientific | 2026 |
| UK Midland Electronics Limited | Transport & logistics | 2015 |
| UK Mobility Parts Ltd | Wholesale & retail | 2023 |
| UK Motors N Limited | Wholesale & retail | 2023 |
| UK Number Plates Ltd | Wholesale & retail | 2026 |
| UK Optical Plastics Limited | Manufacturing | 2002 |
| UK Padel (Leicester) Ltd | Arts & recreation | 2025 |
| UK Pique Ltd | Manufacturing | 2007 |
| UK Pizza Factory Limited | Hospitality | 2021 |
| UK Pizza House Limited | Hospitality | 2024 |
| UK Platform Lifts Ltd | Manufacturing | 2022 |
| UK Prime Mechanics Ltd | Manufacturing | 2023 |
| UK Print Warehouse Ltd | Administrative & support | 2016 |
| UK Priority Services Ltd | Transport & logistics | 2020 |
| UK Priya Ltd | Households | 2025 |
| UK Properties & Investments Ltd | Real estate | 2021 |
| UK Property Finance Limited | Financial services | 2004 |
| UK Property Investment Club Limited | Real estate | 2018 |
| UK Property Maintenance Ltd | Administrative & support | 2010 |
| UK Qualifications for Skills Ltd | Education | 2025 |
| UK Rail Leasing Ltd | Transport & logistics | 2013 |
| UK Rental Properties Ltd | Real estate | 2023 |
| UK Resource Management Ltd | Professional & scientific | 2026 |
| UK Retail Store Ltd | Wholesale & retail | 2023 |
| UK Seamless Gutters Ltd | Construction | 2025 |
| UK Shopper & Supplier Ltd | Transport & logistics | 2023 |
| UK Specials Limited | Wholesale & retail | 2024 |
| UK Stairlifts Limited | Other services | 2001 |
| UK Star Trading Ltd | Wholesale & retail | 2022 |
| UK Store 247 Ltd | Wholesale & retail | 2017 |
| UK Telephones Ltd | Wholesale & retail | 2023 |
| UK Top Care Limited | Health & social care | 2014 |
| UK Traders (Leics) Ltd | Wholesale & retail | 2017 |
| UK Treework Limited | Agriculture & fishing | 2004 |
| UK Tyres (Leicester) Limited | Wholesale & retail | 2016 |
| UK Utility Ltd | Energy | 2013 |
| UK Utility Network Limited | Energy | 2019 |
| UK VAZ Ltd | Wholesale & retail | 2025 |
| UK Visa Tests Limited | Administrative & support | 2020 |
| UK Wholesale & Distribution Ltd | Wholesale & retail | 2023 |
| UK Worldwide Traders Limited | Extraterritorial | 2008 |
| Uk-China Film Collaboration Project Ltd | Education | 2020 |
| Uk.Abbasitrader Ltd | Wholesale & retail | 2025 |
| Uk.Genuine. Stock Limited | Wholesale & retail | 2025 |
| UKA Afromart Limited | Wholesale & retail | 2025 |
| Ukanwa & Sons Ltd | Health & social care | 2024 |
| Ukautomatics Limited | Arts & recreation | 2014 |
| Ukeyecare Ltd | Health & social care | 2022 |
| Ukgymsupplies Ltd | Wholesale & retail | 2024 |
| Ukia Ltd | Information & communication | 2002 |
| Ukiyo Marketing Ltd | Professional & scientific | 2025 |
| Ukonsult Limited | Professional & scientific | 2013 |
| Ukrabbit Ltd | Wholesale & retail | 2022 |
| Uktradebazaar Ltd | Wholesale & retail | 2026 |
| Ukusa Racing Limited | Arts & recreation | 2024 |
| Ukvk Ltd. | Wholesale & retail | 2018 |
| Ukvk Property Investment Ltd | Real estate | 2021 |
| Ukvkbit Ltd | Other services | 2022 |
| Ukwatera Ltd | Extraterritorial | 2015 |
| ULD Track Ltd | Wholesale & retail | 2024 |
| Ullesthorpe Court Hotel and Golf Club Limited | Hospitality | 1997 |
| ULO Global Ltd | Information & communication | 2026 |
| Ultimareach Solutions Limited | Other services | 2023 |
| Ultimate Decorating Ltd | Construction | 2014 |
| Ultimate Reef Ltd | Information & communication | 2012 |
| Ultimate Structural Calculations Ltd | Professional & scientific | 2020 |
| Ultimate Taxi Hire Ltd | Administrative & support | 2025 |
| Ultimateweb Limited | Information & communication | 2002 |
| Ultra Fit Windows Ltd | Construction | 2023 |
| Ultra Limited UK Ltd | Wholesale & retail | 2018 |
| Ultra Medical Services Limited | Health & social care | 2025 |
| Ultra Shield Windows Limited | Construction | 2000 |
| Ultra Trade Ltd | Real estate | 2024 |
| Ultraeducate Ltd | Education | 2024 |
| Ultrafabrics Europe Limited | Wholesale & retail | 2007 |
| Ultrapex Limited | Wholesale & retail | 2022 |
| Ultrapy Limited | Health & social care | 2013 |
| Ulusow Ltd | Transport & logistics | 2023 |
| Ulverscroft Business Centre Ltd | Transport & logistics | 2022 |
| Ulverscroft Developments Limited | Professional & scientific | 2004 |
| Ulverscroft Group Limited | Professional & scientific | 1982 |
| Ulverscroft Limited | Wholesale & retail | 1972 |
| Um-Ay Interior Architecture Ltd | Professional & scientific | 2020 |
| Umak Holdings Limited | Professional & scientific | 2007 |
| Umami Restaurant Limited | Hospitality | 2022 |
| Umang Properties Ltd | Real estate | 2017 |
| Umaps Ltd | Information & communication | 2023 |
| Umar Holdings Limited | Professional & scientific | 2000 |