| Tulip Jewellery Limited | Wholesale & retail | 2021 |
| Turrets (Staines) Management Company Limited | Households | 1989 |
| Turve Limited | Information & communication | 2024 |
| Tuscany Healthcare (UK) Limited | Health & social care | 2009 |
| TVC Leisure Limited | Administrative & support | 2008 |
| TVP Holdco Limited | Financial services | 2024 |
| TW Finance Limited | Real estate | 2004 |
| Twelve Twelve Properties Ltd | Real estate | 2024 |
| Twelvetrees Lettings Ltd | Real estate | 2020 |
| Twenty-Four Seven Executive Ltd | Transport & logistics | 2026 |
| TWH Legal Services Limited | Professional & scientific | 2022 |
| Twirlstar Limited | Information & communication | 1985 |
| Two Fish Partners Ltd | Professional & scientific | 2011 |
| Two Keys Ltd | Manufacturing | 2018 |
| Two Kings Boxing Club C.I.C. | Arts & recreation | 2022 |
| TX Care UK Limited | Health & social care | 2022 |
| TXN Cloud Design Ltd | Administrative & support | 2018 |
| Tykay Limited | Health & social care | 2021 |
| Tyler Engineering Limited | Construction | 1982 |
| Tyrrell's Consulting Limited | Professional & scientific | 2007 |
| U2UNI Limited | Education | 2020 |
| Ubbi Logistics Ltd | Information & communication | 2023 |
| UF Group Ltd | Wholesale & retail | 2009 |
| Ufton Green Stables Ltd | Agriculture & fishing | 2024 |
| Uhhf Limited | Households | 2009 |
| UJ Consultants Limited | Professional & scientific | 2025 |
| UK ACC 2000 Limited | Arts & recreation | 1999 |
| UK Compliance Solutions Limited | Professional & scientific | 2014 |
| UK Crystal Clean Limited | Administrative & support | 2025 |
| UK Diving Academy Ltd | Education | 2021 |
| UK South Services Limited | Construction | 2008 |
| UK TJ Enterprise Ltd | Wholesale & retail | 2019 |
| UK Traffic Management Services Ltd | Transport & logistics | 2022 |
| UK Utility Connections Limited | Water & waste | 2024 |
| UK Wheels Motors Ltd | Wholesale & retail | 2025 |
| Ukccf Limited | Administrative & support | 2021 |
| Ukstudentjob Limited | Administrative & support | 2026 |
| Ultima Fashions UK Ltd | Professional & scientific | 2026 |
| Ultimat Frames Limited | Manufacturing | 2013 |
| Ultimate Comfort Care Limited | Health & social care | 2026 |
| Ultra Finish Limited | Wholesale & retail | 2020 |
| UM Support Solutions Ltd | Administrative & support | 2025 |
| Umbrella Partnerships Ltd | Construction | 2022 |
| Umfoods Ltd | Hospitality | 2016 |
| Ummah Safari LLP | | 2025 |
| Underline Communications Limited | Professional & scientific | 1981 |
| Underline Group Limited | Professional & scientific | 1992 |
| Underwood Car Centre Limited | Wholesale & retail | 2023 |
| Undrell.Co.Uk Limited | Hospitality | 2024 |
| Unearth Ltd | Administrative & support | 2025 |
| Uneek Limited | Administrative & support | 2016 |
| Unholy Donuts Ltd | Hospitality | 2020 |
| Unicorn Days Ltd | Hospitality | 2020 |
| Unimate Software Limited | Information & communication | 1999 |
| Universal Operating Solutions Ltd | Information & communication | 2020 |
| UNO Management Services Limited | Wholesale & retail | 2010 |
| Unplug Unity Ltd | Education | 2024 |
| Untamed Vision Studio Limited | Transport & logistics | 2025 |
| UP My Slieve Solutions Limited | Professional & scientific | 2014 |
| Upbeat Marketing Limited | Professional & scientific | 2015 |
| Uplin Ltd | Information & communication | 2026 |
| Upmarketry Ltd | Professional & scientific | 2017 |
| Urban Paws London Limited | Wholesale & retail | 2018 |
| USE a Franchise Limited | Information & communication | 2010 |
| V.S.I. Vacational Studies International Limited | Education | 1973 |
| V4TH Limited | Professional & scientific | 2018 |
| Vabches Trade (UK) Ltd | Wholesale & retail | 2024 |
| VAC Consultants Ltd | Health & social care | 2024 |
| Vaghela Consulting Ltd | Information & communication | 2014 |
| Vaia Longevity Ltd | Information & communication | 2026 |
| Vaillante Kitchen Limited | Hospitality | 2024 |
| Valinta Ltd | Wholesale & retail | 2023 |
| Valnore Ltd | Information & communication | 2026 |
| Van Aaken Consulting Limited | Professional & scientific | 2015 |
| Vanessa's Makeup Ltd | Other services | 2025 |
| Vansfinite Solutions Ltd | Information & communication | 2025 |
| Vantage Digital Advisory Ltd | Information & communication | 2026 |
| Vantage Vans Limited | Wholesale & retail | 2026 |
| Vape Squared Ltd | Wholesale & retail | 2024 |
| Varatio Gear Boxes Limited | Manufacturing | 2008 |
| Varatio Holdings Limited | Professional & scientific | 1991 |
| Varatio Limited | Extraterritorial | 2019 |
| Vastern Road Management Company Limited | Households | 1997 |
| Vault Couture Limited | Administrative & support | 2009 |
| VC Cybercloud Solutions Limited | Information & communication | 2024 |
| Vdbi Limited | Real estate | 2019 |
| Veda Sriram Infotech Ltd | Information & communication | 2017 |
| VEE Apiculturists Ltd | Agriculture & fishing | 2023 |
| Veeband Limited | Wholesale & retail | 2019 |
| Vehicle Vision International Limited | Information & communication | 2016 |
| Vell Info Limited | Information & communication | 2012 |
| Vellar Sound Ltd | Other services | 2024 |
| Vellichor Limited | Professional & scientific | 2016 |
| Vellichor Property Ltd | Real estate | 2021 |
| Vellum Court Management Company Limited | Professional & scientific | 2006 |
| Veloce Advisory Ltd | Wholesale & retail | 2022 |
| Venture Spirits Limited | Wholesale & retail | 2024 |
| Venus Safety & Health UK Limited | Wholesale & retail | 2021 |
| Verdant Valley Farm Limited | Wholesale & retail | 2025 |
| Verdurearb Ltd | Agriculture & fishing | 2025 |