| Ttss Limited | Administrative & support | 2008 |
| Ttss Transportation Limited | Administrative & support | 2000 |
| Tuan Viet UK Limited | Hospitality | 2020 |
| Tuart UK Limited | Manufacturing | 2017 |
| Tulip Consultancy Services Ltd | Other services | 2019 |
| Tulip House Ltd | Real estate | 2025 |
| Tulip Properties (London) Ltd | Real estate | 2020 |
| Tullett Limited | Professional & scientific | 2015 |
| Tumar Properties Ltd | Real estate | 2024 |
| Tumbao Ltd | Information & communication | 2025 |
| Tunza Games Ltd | Wholesale & retail | 2015 |
| Turew Services Ltd | Information & communication | 2016 |
| Turi Traders Ltd | Administrative & support | 2020 |
| Turner & LIM Property Solutions Ltd | Real estate | 2025 |
| Turning Point Generation Ltd | Professional & scientific | 2012 |
| Tuti Fruti Limited | Wholesale & retail | 2015 |
| Tutorly Learning Ltd | Administrative & support | 2026 |
| Tutoruniverse Limited | Education | 2025 |
| TV Aerial Installations Ltd | Information & communication | 2012 |
| TVM Retail & Wholesale Ltd | Wholesale & retail | 2018 |
| Twenty Catherine Road Ltd | Real estate | 2006 |
| Twickenham (Kneller) Residents Company Limited | Households | 2003 |
| Twilight World Ltd | Manufacturing | 2025 |
| Two Claremont Gardens Management Limited | Households | 1978 |
| Two SIX Two Production Ltd | Professional & scientific | 2024 |
| TX Digital Limited | Arts & recreation | 2006 |
| TXE Ltd | Professional & scientific | 2022 |
| Tyne Support Limited | Administrative & support | 2025 |
| U & J Services Ltd | Real estate | 2024 |
| UA Painting & Decoration Limited | Construction | 2018 |
| Ubitech Limited | Information & communication | 2011 |
| Udora Global Limited | Real estate | 2019 |
| Uevolve Ltd | Professional & scientific | 2012 |
| UG Traders Ltd | Transport & logistics | 2026 |
| UK Housing Hub Ltd | Real estate | 2023 |
| UK HUA Dzan Amitabha College Ltd | Information & communication | 2016 |
| UK Multi Cleaners Limited | Administrative & support | 2023 |
| Ukasia Solutions Ltd | Professional & scientific | 2024 |
| Ukcentric Limited | Information & communication | 2000 |
| Uksnackz Ltd | Wholesale & retail | 2021 |
| Umair Tariq Limited | Wholesale & retail | 2025 |
| Umar Gill Limited | Transport & logistics | 2024 |
| Understood Digital Ltd | Information & communication | 2021 |
| Unitax Ltd | Professional & scientific | 2023 |
| Unite Commodities UK Limited Ltd | Professional & scientific | 2019 |
| United Drivers Ltd | Transport & logistics | 2020 |
| United MED Ltd | Wholesale & retail | 2014 |
| United Regency Services Limited | Transport & logistics | 2016 |
| United Treasury Ltd | Financial services | 2015 |
| Unitrad Ltd | Wholesale & retail | 2017 |
| Unity Esports Limited | Professional & scientific | 2025 |
| Universalis Occupational Health Limited | Health & social care | 2026 |
| Upad London Ltd | Professional & scientific | 2019 |
| Uplusdigital Limited | Professional & scientific | 2017 |
| Uraself Ltd | Information & communication | 2019 |
| Urban Edge Constructionn Limited | Construction | 2024 |
| Urbancore Limited | Construction | 2025 |
| Usef Properties Limited | Real estate | 2024 |
| USF Motors Limited | Wholesale & retail | 2017 |
| Utopia Spa Limited | Extraterritorial | 2019 |
| Utopia Wellness and Leisure Limited | Other services | 2017 |
| Uxnow Ltd | Information & communication | 2024 |
| V Fresh Ltd | Wholesale & retail | 2022 |
| V Signs Limited | Manufacturing | 2002 |
| V Sumith Limited | Wholesale & retail | 2023 |
| V Visuals Ltd | Professional & scientific | 2020 |
| V&V Cleaning Limited | Administrative & support | 2017 |
| V&Z Bild Ltd | Construction | 2023 |
| V&Z Garden Limited | Hospitality | 2019 |
| V. Videv Construction Ltd | Construction | 2024 |
| V2V Limited | Real estate | 2025 |
| V5 Pest Control & Cleaning Services Ltd | Administrative & support | 2025 |
| Vaishu IT Services Limited | Information & communication | 2010 |
| Vaishutrade Ltd | Wholesale & retail | 2025 |
| Valiant Electric Facilities Limited | Construction | 2010 |
| Validserve Limited | Other services | 1994 |
| Value Chain Architecture Ltd | Professional & scientific | 2023 |
| Vanessa Hamilton and Partners Ltd | Professional & scientific | 2003 |
| Vanilla Mobile Limited | Other services | 2014 |
| Vanina Mannu Limited | Information & communication | 2017 |
| Vankata Ltd | Construction | 2023 |
| Vanology Conversions Ltd | Wholesale & retail | 2023 |
| Vanstone & Sons Ltd | Wholesale & retail | 2026 |
| Vapelab & Mobile Ltd | Wholesale & retail | 2025 |
| Varna Engineering Limited | Construction | 2008 |
| Varna Holdings Ltd | Financial services | 2025 |
| Vayak Limited | Information & communication | 2015 |
| VCR Holdings Ltd | Professional & scientific | 2023 |
| Veena Import and Export Limited | Wholesale & retail | 2018 |
| Vegan Tailoring Ltd | Real estate | 2019 |
| Veilix Ltd | Information & communication | 2024 |
| Velmora Private Limited | Hospitality | 2026 |
| Velor Sun Brew Ltd | Manufacturing | 2026 |
| Veloura Drive Co. Limited | Wholesale & retail | 2025 |
| Velti Construction Ltd | Construction | 2024 |
| Velvet & Cream Limited | Wholesale & retail | 2021 |
| Velvetime Limited | Real estate | 1998 |
| Veni Cleaning Services Ltd | Administrative & support | 2018 |
| Venture Aviation Ltd | Transport & logistics | 2017 |
| Venture Healthcare Ltd | Manufacturing | 2015 |