| UIR Ltd | Hospitality | 2025 |
| UK + Direct Limited | Wholesale & retail | 2013 |
| UK 786 Limited | Construction | 2015 |
| UK Accounts Ltd | Professional & scientific | 2019 |
| UK Airport Transfer Ltd | Administrative & support | 2025 |
| UK Airports Link Ltd | Transport & logistics | 2013 |
| UK Asia Remit Limited | Financial services | 2017 |
| UK Blade Access Ltd | Manufacturing | 2019 |
| UK Brand X Limited | Administrative & support | 2022 |
| UK Builders Merchants Limited | Other services | 2016 |
| UK Care Buy and Sale House Limited | Real estate | 2024 |
| UK Certified Installers Ltd | Construction | 2025 |
| UK Commercial Finance Ltd | Financial services | 2023 |
| UK Cooling Services Ltd | Professional & scientific | 2022 |
| UK Drainage Group Limited | Water & waste | 2025 |
| UK Drainage Solutions Limited | Construction | 2020 |
| UK Edu-Link Limited | Professional & scientific | 2023 |
| UK Estates Investments Limited | Hospitality | 2016 |
| UK Expert Education and Visa Services Ltd | Education | 2025 |
| UK Express Connect Cars Ltd | Transport & logistics | 2012 |
| UK Flash Deals Ltd | Wholesale & retail | 2025 |
| UK Food Trading Ltd | Hospitality | 2015 |
| UK GAS & Plumbing Limited | Construction | 2011 |
| UK Global Healthcare Clinics Limited | Health & social care | 2019 |
| UK Global Healthcare Innovations Limited | Information & communication | 2019 |
| UK Global Healthcare Limited | Health & social care | 2015 |
| UK Goods Trading Limited | Wholesale & retail | 2023 |
| UK Happy Care Ltd | Hospitality | 2019 |
| UK HMO Services Limited | Real estate | 2020 |
| UK Hypnotherapy Council Ltd. | Other services | 2015 |
| UK India Healthcare Collaboration Ltd | Health & social care | 2012 |
| UK India Healthcare Collaboration- Work Force Limited | Health & social care | 2015 |
| UK India Trade Experts Ltd | Professional & scientific | 2023 |
| UK IT Hub Limited | Wholesale & retail | 2024 |
| UK Law IT Ltd | Information & communication | 2018 |
| UK Law Practice Ltd | Administrative & support | 2024 |
| UK London Chauffeur (Tours) Limited | Administrative & support | 2014 |
| UK London Coaches Limited | Transport & logistics | 2016 |
| UK London Limited | Financial services | 2022 |
| UK Medical Education Limited | Health & social care | 2024 |
| UK Meldi Food Limited | Wholesale & retail | 2025 |
| UK on the Way Ltd | Wholesale & retail | 2023 |
| UK Online Sales Ltd | Wholesale & retail | 2020 |
| UK OZ Logistics Ltd | Transport & logistics | 2024 |
| UK Pharma Ltd | Professional & scientific | 2020 |
| UK Plaster Craft Ltd | Construction | 2026 |
| UK Premier Contractors Ltd | Construction | 2025 |
| UK Premier Homes Ltd | Hospitality | 2024 |
| UK Pro Property Investment Ltd | Real estate | 2025 |
| UK Property Investors&Co Ltd | Real estate | 2020 |
| UK Property Management Solution Limited | Real estate | 2024 |
| UK Realty Horizon Limited | Real estate | 2022 |
| UK Realty Management Limited | Real estate | 2020 |
| UK Refurbishment Limited | Construction | 2002 |
| UK Regulatory Consultancy Limited | Professional & scientific | 2011 |
| UK Rentalcars Limited | Administrative & support | 2025 |
| UK Repair Hub Limited | Wholesale & retail | 2024 |
| UK Retailers Ltd | Wholesale & retail | 2025 |
| UK School of Management Limited | Education | 2017 |
| UK Smart Design & Build Ltd | Construction | 2022 |
| UK Student Information Centre Ltd | Education | 2023 |
| UK Student Solutions Ltd | Administrative & support | 2011 |
| UK Sunrise Properties Ltd | Real estate | 2024 |
| UK Supplies Limited | Wholesale & retail | 2011 |
| UK Tech Supplies Ltd | Other services | 2020 |
| UK Thoroughbreds Ltd | Arts & recreation | 2020 |
| UK Trade Vans Limited | Wholesale & retail | 2026 |
| UK Trade Vehicles Limited | Wholesale & retail | 2010 |
| UK Values Alliance CIC | Other services | 2021 |
| UK W Homes LLP | | 2026 |
| Uk-Gcc Private Capital Ltd | Financial services | 2026 |
| UK1 Hire Ltd | Wholesale & retail | 2014 |
| Ukin Trading Ltd | Wholesale & retail | 2016 |
| Ukiportal Limited | Professional & scientific | 2025 |
| UKMEDICS4U Ltd | Health & social care | 2023 |
| Ukmiku Ltd | Education | 2024 |
| Ukprosec Fire & Security Ltd | Administrative & support | 2024 |
| Ukse Limited | Education | 2024 |
| Uktechgroup Ltd | Wholesale & retail | 2023 |
| Uliveorganics Ltd | Manufacturing | 2019 |
| Ultimate Boats (UK) Limited | Manufacturing | 2023 |
| Ultimate CFO Limited | Professional & scientific | 2025 |
| Ultimate Investments Ltd | Real estate | 2019 |
| Ultimate Supplies Ltd | Wholesale & retail | 2004 |
| Ultra Fast Hormones Ltd | Health & social care | 2013 |
| Ultra Haze Limited | Information & communication | 2017 |
| Ultra Ice (UK) Limited | Manufacturing | 1985 |
| Ultra Properties Ltd | Real estate | 2026 |
| Ultradale Limited | Administrative & support | 2008 |
| Ultratek Limited | Information & communication | 2023 |
| Ultruo Technology Ltd | Information & communication | 2025 |
| UM Albaneen Ltd | Health & social care | 2021 |
| Umaima Zainab Foods Ltd | Hospitality | 2017 |
| Umakhodal Foods Limited | Hospitality | 2025 |
| Umalhayaa Ltd | Wholesale & retail | 2023 |
| Umbagu Ltd | Other services | 2007 |
| Umedical Healthcare Services Ltd | Health & social care | 2026 |
| Umeria Property Group Limited | Real estate | 2019 |
| Umesh & Kanti Limited | Wholesale & retail | 2018 |
| Umiya Construction Limited | Construction | 2026 |