| Tivoli Court Limited | Other services | 2019 |
| TJM Group Limited | Construction | 2020 |
| TKJ Partners Limited | Professional & scientific | 2010 |
| TLC Investment Properties Ltd | Real estate | 2019 |
| TNS Tech Ltd | Extraterritorial | 2018 |
| TNS Technologies Ltd | Professional & scientific | 2018 |
| Tollz Limited | Real estate | 2019 |
| TOM Smith Christmas Crackers Limited | Extraterritorial | 1983 |
| TOM Smith Crackers Limited | Extraterritorial | 1997 |
| TOM Smith Group Ltd | Extraterritorial | 1988 |
| TOM Smith Limited | Extraterritorial | 1991 |
| TOM Smith On-Line Limited | Extraterritorial | 1999 |
| Tomcar Ltd | Wholesale & retail | 2019 |
| Tooleys Mill Management Company Limited | Households | 2004 |
| Top Farm Barns Management (Wyboston) Limited | Households | 2021 |
| Top Notch Lettings Ltd | Real estate | 2021 |
| Touch Star Investment Limited | Real estate | 2024 |
| Track Consultancy Services Ltd | Professional & scientific | 2026 |
| Trading Expo Ltd | Hospitality | 2022 |
| Transtech MK Ltd | Wholesale & retail | 2014 |
| Treadmarc Limited | Wholesale & retail | 2004 |
| Trident Force Limited | Administrative & support | 2023 |
| Trio Land Limited | Construction | 2012 |
| Trio Square Homes Ltd | Real estate | 2026 |
| Trio Square Limited | Construction | 2009 |
| Triton Security Ltd | Administrative & support | 2026 |
| True North Financial Planning Ltd | Administrative & support | 2021 |
| Truline Supplies Ltd | Wholesale & retail | 2026 |
| Trust Consultants Ltd | Professional & scientific | 2017 |
| Ttich Stables Limited | Administrative & support | 2020 |
| TTL Construction Limited | Construction | 1994 |
| Tumble Events Ltd | Arts & recreation | 2021 |
| Turkish Barber (Newport Pengell) Ltd | Other services | 2024 |
| Turtle Properties Ltd | Information & communication | 2015 |
| Twin Property and Management Limited | Real estate | 1987 |
| Two Tribes Consultancy Limited | Professional & scientific | 2012 |
| Two Wrestlers Garage Limited | Wholesale & retail | 2009 |
| Twsc Limited | Administrative & support | 2022 |
| Ugly Frog Consulting Limited | Information & communication | 2018 |
| UK Property Investing Limited | Real estate | 2024 |
| Ukjp Limited | Hospitality | 2017 |
| Ultimate Variety Ltd | Wholesale & retail | 2025 |
| Understandable Economics Action Limited | Information & communication | 2025 |
| Understandable Economics Limited | Information & communication | 2025 |
| Undiscovered Berchtesgaden Ltd | Administrative & support | 2016 |
| Union Facilities Ltd | Administrative & support | 2025 |
| Uniq Design Limited | Professional & scientific | 2006 |
| Unique Handmade Gifts Ltd | Wholesale & retail | 2021 |
| Unis Commercial Management Ltd | Professional & scientific | 2026 |
| Uniserv London Limited | Information & communication | 2009 |
| Unit 4 Motors Limited | Professional & scientific | 2002 |
| Unitycare Support Ltd | Health & social care | 2026 |
| UNO Property Ltd | Real estate | 2016 |
| Untold Investor Relations Ltd | Professional & scientific | 2023 |
| Upgrade Lifts Ltd | Professional & scientific | 2018 |
| Uptree Limited | Administrative & support | 2015 |
| Urban Electrical Contractors Limited | Construction | 2014 |
| Urban Hyderabadi Ltd | Hospitality | 2025 |
| Urban Pavilion Ltd | Real estate | 2012 |
| V2 PLY Lining Ltd | Wholesale & retail | 2010 |
| Vachi Designs Ltd | Wholesale & retail | 2022 |
| Vagari Bags Limited | Manufacturing | 2023 |
| Valeria C Boutique Limited | Wholesale & retail | 2014 |
| Vanessa Aceto Ltd | Health & social care | 2019 |
| Vardo Ventures Ltd | Financial services | 2018 |
| Variation Design Consultants Limited | Information & communication | 2007 |
| Vector AV Limited | Administrative & support | 2002 |
| Vector Creative Limited | Professional & scientific | 2020 |
| Vector Lighting Limited | Administrative & support | 1999 |
| Vedra Property Investments Limited | Administrative & support | 2020 |
| Velaaro Group Ltd | Wholesale & retail | 2024 |
| Velmore Holdings Limited | Professional & scientific | 1992 |
| Velmore Limited | Professional & scientific | 1974 |
| Velomotion Limited | Arts & recreation | 2009 |
| Velovantage Retail Limited | Wholesale & retail | 2025 |
| Venture Commercial Partners Limited | Real estate | 2020 |
| Venture Group Holdings Limited | Financial services | 2020 |
| Venture Investments Commercial and Residential Limited | Real estate | 2022 |
| Venture Residential Lettings Limited | Real estate | 2016 |
| Venture Residential Ltd | Real estate | 2015 |
| Verdant Founders Ltd | Professional & scientific | 2025 |
| Verigen Research Ltd | Wholesale & retail | 2026 |
| Vibe London Group Limited | Wholesale & retail | 2022 |
| Victorian Manors Ltd | Real estate | 2013 |
| Vigilant Guardian Security Ltd | Administrative & support | 2024 |
| Village Pets @ Rookery Farm Ltd | Other services | 2019 |
| Vintage 24 Ltd | Construction | 2011 |
| Vintworth Consulting Limited | Information & communication | 2016 |
| Virginijus Ltd | Transport & logistics | 2018 |
| Virtual Programming Limited | Arts & recreation | 2000 |
| Vision Systems Cctv Ltd | Other services | 2017 |
| Vitae Digital Ltd | Information & communication | 2026 |
| Vital Living Limited | Administrative & support | 2009 |
| Vital Safety Limited | Professional & scientific | 2001 |
| Vk-Aa Ltd | Real estate | 2023 |
| VLH ISW Ltd | Health & social care | 2021 |
| Volador Flytech Limited | Manufacturing | 2020 |
| Volleyball Academies Ltd | Education | 2022 |
| Vpconsult Limited | Professional & scientific | 2026 |
| VTR Heating Limited | Construction | 2019 |