| Tower Electrical Essex Limited | Construction | 2022 |
| Tower Group Essex Limited | Financial services | 2022 |
| TPM Secretarial Services Ltd | Administrative & support | 2019 |
| Trade Cars Rayleigh Ltd | Wholesale & retail | 2022 |
| Trade Thrive Limited | Wholesale & retail | 2024 |
| Trade Tool Giveaways Ltd | Wholesale & retail | 2020 |
| Tranquil Energy Limited | Extraterritorial | 2022 |
| Transcars Transport Ltd | Transport & logistics | 2018 |
| Transmission Check Limited | Manufacturing | 2014 |
| Transmissions Holdings UK Limited | Financial services | 2019 |
| Transparent Property Management Ltd | Households | 2019 |
| Transport With Care Ltd | Transport & logistics | 2024 |
| Transporter Organisation Ltd | Manufacturing | 2025 |
| Transweld Limited | Manufacturing | 2003 |
| Tree King Services Limited | Administrative & support | 2020 |
| Trevor Burns Ltd | Professional & scientific | 2018 |
| Trinity Lodge (Southchurch) Management Company Limited | Households | 1992 |
| Triple a Business Solutions Ltd | Professional & scientific | 2013 |
| Tristar Later Life Planning Limited | Financial services | 2016 |
| TRO Catering Ltd | Hospitality | 2015 |
| Trudi Collins Photography Ltd | Professional & scientific | 2016 |
| True Path Therapeutic Services Ltd | Professional & scientific | 2023 |
| Trusearch Consulting Ltd | Administrative & support | 2020 |
| TSF Transport Ltd | Transport & logistics | 2025 |
| Tslx Limited | Professional & scientific | 2024 |
| TSS Carpentry Ltd | Construction | 2017 |
| TT Construction Limited | Construction | 2020 |
| TTW Stag Limited | Construction | 2019 |
| Tugby Roche Property Investment Ltd | Real estate | 2026 |
| Tula Ltd | Professional & scientific | 2018 |
| Tundepropertygroup Ltd | Households | 2026 |
| Twosox Limited | Health & social care | 2016 |
| Tyre Foods Ltd | Hospitality | 2025 |
| Uape Ecommerce Limited | Information & communication | 2012 |
| Uchange Commercial Limited | Information & communication | 2015 |
| Uchange E V LLP | | 2021 |
| UK Tennis Limited | Information & communication | 2011 |
| UK Thermal Insulation Ltd | Construction | 2018 |
| UK Window Medic Ltd | Construction | 2023 |
| Ukiyo Collective Limited | Real estate | 2025 |
| Ukretrofit Ltd | Construction | 2014 |
| Union Renewables Group Limited | Construction | 2020 |
| Unique Avenue Limited | Wholesale & retail | 2015 |
| Unique Office Solutions Limited | Manufacturing | 1995 |
| Universal Properties (Piccadilly) Limited | Real estate | 2003 |
| Universal Steel (Southern) Ltd | Financial services | 2019 |
| Universal Steel Ltd | Construction | 2014 |
| Untangled Limited | Other services | 2016 |
| UP to Summit CIC | Education | 2026 |
| UPM Limited | Real estate | 2007 |
| Urban Property Management Limited | Administrative & support | 2006 |
| Utility Mapping Limited | Extraterritorial | 1997 |
| V S Sebastiean Ltd | Professional & scientific | 2012 |
| V-Matrix Limited | Real estate | 2008 |
| V-Matrix Property Services Ltd | Professional & scientific | 2020 |
| Vanguard Engineers and Consultants Limited | Construction | 2026 |
| Vans Online Ltd | Wholesale & retail | 2020 |
| Vastrans (UK) Ltd | Transport & logistics | 2003 |
| VE2 Limited | Administrative & support | 2016 |
| Vector Property Management Limited | Real estate | 2008 |
| Vedicbrooke Limited | Real estate | 2024 |
| Veeloop Limited | Information & communication | 2017 |
| Vegan Card Ltd | Other services | 2019 |
| Vehicle Movement Solutions Ltd | Other services | 2014 |
| Vendie Limited | Wholesale & retail | 2026 |
| Ventilation Maintenance Solutions Ltd | Professional & scientific | 2023 |
| Ventoux Digital Limited | Information & communication | 2018 |
| Verex Premium Finance Limited | Financial services | 2010 |
| Verified Adviser Limited | Financial services | 2026 |
| Vertical Sync Ltd | Manufacturing | 2018 |
| VH Insights Ltd | Professional & scientific | 2021 |
| VIA Wire Holdings Ltd | Financial services | 2023 |
| VIA Wire Internet Limited | Information & communication | 2019 |
| VIA Wire Ltd | Information & communication | 2010 |
| Viajar Ltd | Professional & scientific | 2024 |
| Vibe Active Communications Limited | Information & communication | 2002 |
| Vibod Limited | Professional & scientific | 2022 |
| Victoria Chambers EC 2 Limited | Households | 1991 |
| Victoria House Fireplaces Limited | Wholesale & retail | 2005 |
| Videre Solutions Services Ltd | Administrative & support | 2019 |
| VIE Aesthetics Ltd | Health & social care | 2013 |
| Viederma Ltd | Health & social care | 2019 |
| Viewsure Limited | Professional & scientific | 2009 |
| Vine Homes Ltd | Health & social care | 2018 |
| VINTAGE62 Ltd | Wholesale & retail | 2022 |
| Viror Limited | Professional & scientific | 2022 |
| Virtual Personal Assistant Ltd | Administrative & support | 2020 |
| Vision Wheels Limited | Wholesale & retail | 2024 |
| Visual Jjam Ltd | Professional & scientific | 2018 |
| Visual Life Collective Limited | Professional & scientific | 2022 |
| Volt Media Limited | Professional & scientific | 2024 |
| Vora Solutions Limited | Information & communication | 2020 |
| Voxelmaps FIN Co UK Limited | Financial services | 2026 |
| Voxelmaps Ltd | Information & communication | 2019 |
| VWP Media Limited | Administrative & support | 2021 |
| Wakey Wakey Cafe Limited | Hospitality | 2013 |
| Walker Blakeley Kitchens Limited | Construction | 2002 |
| Walnut Learning Limited | Information & communication | 2025 |
| Wamburg Information Systems Limited | Information & communication | 2013 |
| Want 1 Service Ltd | Water & waste | 2025 |