| Ultra SIP Panels Ltd | Construction | 2022 |
| Ultra Sports Medical Ltd | Health & social care | 2022 |
| Umwelt Limited | Hospitality | 2003 |
| Unibar Plumbing & Heating Limited | Construction | 1962 |
| Uniform Mortgages Ltd | Financial services | 2006 |
| Unight Automotive Ltd | Wholesale & retail | 2024 |
| Unique Conversions Ltd | Wholesale & retail | 2021 |
| Unique Storage Solutions Ltd | Construction | 2021 |
| Uniscoops Ltd | Education | 2023 |
| United Coconut Limited | Hospitality | 2025 |
| United Wearestrong Ltd | Health & social care | 2021 |
| UP Beteiligung Ltd | Extraterritorial | 2021 |
| Updraft Group Ltd | Financial services | 2021 |
| Upeak Community Fitness Centre Limited | Arts & recreation | 2022 |
| Upmotion PR Ltd | Information & communication | 2024 |
| Upton TR Group Limited | Construction | 2024 |
| Usrah Project Ltd | Health & social care | 2017 |
| V-Tech Diagnostics Ltd | Professional & scientific | 2021 |
| Valk Yacht Group Ltd | Administrative & support | 2020 |
| Value Notions Limited | Information & communication | 2023 |
| Valuepro Consultancy Limited | Professional & scientific | 2022 |
| Valuepro Healthcare Ltd | Health & social care | 2023 |
| Vanessa Newman Property Agents Ltd | Real estate | 2025 |
| Vangard Construction Limited | Construction | 2017 |
| Vantage Coaching Ltd | Education | 2025 |
| VC Investments Limited | Professional & scientific | 2002 |
| Veer Properties Alpha Ltd | Real estate | 2019 |
| Veer Properties Beta Limited | Real estate | 2022 |
| Veer Properties Delta Limited | Real estate | 2022 |
| Veer Properties Gamma Limited | Real estate | 2020 |
| Veer Properties Limited | Real estate | 2016 |
| Vehicle Repair Specialists UK Limited | Wholesale & retail | 2012 |
| Velocore Ltd | Other services | 2023 |
| Vendiva Ltd | Hospitality | 2002 |
| Ventura Agroscience Limited | Wholesale & retail | 2013 |
| Venture Spaces Limited | Extraterritorial | 2011 |
| Verigas Engineering Limited | Manufacturing | 2016 |
| Verigas Holdings Limited | Financial services | 2023 |
| Veritek Global Solutions Limited | Professional & scientific | 2013 |
| Vermigon Ltd | Agriculture & fishing | 2025 |
| Vexari Ltd | Other services | 2021 |
| Victorious Life Limited | Health & social care | 2021 |
| Viridian Financial Services Ltd | Financial services | 2015 |
| Visorvision Ltd | Wholesale & retail | 2005 |
| Vital Sign Design Limited | Administrative & support | 2013 |
| Vivify Public Relations Limited | Information & communication | 2021 |
| Vivifyd Ltd | Professional & scientific | 2010 |
| Vivoco Limited | Real estate | 2018 |
| Vizcall Limited | Manufacturing | 2010 |
| VK Global Cuisine Limited | Hospitality | 2023 |
| VNM Ventures Limited | Real estate | 2026 |
| Vomela Moss UK Limited | Financial services | 2023 |
| Vortexcraft Ltd | Other services | 2024 |
| Vreyenergy Ltd | Extraterritorial | 2025 |
| Vsrk Ltd | Wholesale & retail | 2026 |
| W & a Andersons Services Limited | Professional & scientific | 2014 |
| W Mumford & SON Limited | Agriculture & fishing | 2021 |
| W&W Accountants Limited | Professional & scientific | 2020 |
| Waldon-Harris Ltd | Arts & recreation | 2005 |
| Walkling Holdings Limited | Financial services | 2024 |
| Walt Technologies Limited | Information & communication | 2008 |
| Waterbird Parakites Limited | Manufacturing | 2015 |
| Waterloo Construction Limited | Real estate | 2008 |
| Waterside Vets Ltd | Professional & scientific | 2022 |
| Waterwei Electronics UK Ltd | Wholesale & retail | 2021 |
| Watling Heating Limited | Construction | 2003 |
| Watts Industries UK Limited | Manufacturing | 1991 |
| Watts UK Limited | Extraterritorial | 2000 |
| WAX Emporium Ltd | Wholesale & retail | 2022 |
| Web Plans Ltd | Professional & scientific | 2024 |
| Weg-Adresse.Com Ltd | Administrative & support | 2021 |
| Welch Cakes & Bakes Ltd | Manufacturing | 2022 |
| Weld-Tech Solutions Limited | Administrative & support | 2018 |
| Wellington ST (Bedford) Limited | Households | 2024 |
| WER Contracting Ltd | Wholesale & retail | 2018 |
| Westlove Homes Limited | Real estate | 2015 |
| Wheeler's Trading Ltd | Wholesale & retail | 2024 |
| Where's the Full Stop Marketing Limited | Professional & scientific | 2022 |
| White Lion 1967 Ltd | Hospitality | 2019 |
| Whitelaw Business Angels Ltd | Administrative & support | 2021 |
| Whitman IS Limited | Financial services | 2011 |
| Wickham International Limited | Information & communication | 1988 |
| Wilkbourne Engineering Ltd | Professional & scientific | 2025 |
| William Lloyd Associates Limited | Administrative & support | 2016 |
| Williams Construction & Build Limited | Construction | 2024 |
| Williams, Williams and Sons Limited | Professional & scientific | 2024 |
| Willow Accountancy Services Limited | Professional & scientific | 2025 |
| Willow ROW Barrow Limited | Other services | 2016 |
| WIN & Property Ltd | Real estate | 2021 |
| Windows Pristine Ltd | Administrative & support | 2019 |
| Wing Woman Plus Ltd | Professional & scientific | 2025 |
| Wipe & Dust Ltd | Administrative & support | 2019 |
| Wir-Die-Menschen Ltd | Other services | 2021 |
| WIR3D UP Ltd | Construction | 2025 |
| Wisen Innovation (UK) Ltd | Professional & scientific | 2011 |
| WNB Enterprises Ltd | Transport & logistics | 2020 |
| Wolf Property Maintenance Services Limited | Real estate | 2025 |
| Wolfguard Lock & Pest Management Limited | Manufacturing | 2021 |
| Wood's Property Management Ltd. | Real estate | 2017 |
| Woodgate Property Developments Limited | Construction | 2014 |