| Trendy Techz Ltd | Wholesale & retail | 2023 |
| Tresjosethekumkattil Ltd | Health & social care | 2015 |
| Trethiongym Ltd | Arts & recreation | 2023 |
| TRI Plus Electrical Ltd | Construction | 2025 |
| Tribal Supplements Ltd | Wholesale & retail | 2025 |
| Trilogy Blasting Services Limited | Manufacturing | 2020 |
| Trimco SW Ltd | Wholesale & retail | 2020 |
| Trios UK Event Designers Ltd | Hospitality | 2025 |
| Triplevilla Limited | Administrative & support | 1986 |
| Tristone Nash Ltd | Administrative & support | 2016 |
| Tritech Search Limited | Administrative & support | 2026 |
| TRU Event Security & Consultancy Ltd | Professional & scientific | 2022 |
| Tru-Surv S&W Ltd | Professional & scientific | 2025 |
| Truufles Ltd | Information & communication | 2017 |
| TS Coker Investments Ltd | Professional & scientific | 2022 |
| TTF Racing Ltd | Arts & recreation | 2023 |
| Tuckshop Automotive Services Ltd | Wholesale & retail | 2025 |
| Tung FEI Ltd | Hospitality | 2022 |
| Turners Commercials Limited | Manufacturing | 2020 |
| Turnspeed Precision Engineering Company Limited | Manufacturing | 1980 |
| Turtledove Consolidated Limited | Real estate | 2017 |
| Tuscan (Holdings) Limited | Financial services | 2012 |
| Tuscan Tooling Limited | Extraterritorial | 2016 |
| Tuscan Yeovil Limited | Extraterritorial | 2016 |
| TWB Investments | Financial services | 2020 |
| Twoleaf Property Management Ltd | Real estate | 2016 |
| Uber Quirky Ltd | Professional & scientific | 2015 |
| UK Best Parts Ltd | Extraterritorial | 2021 |
| UK Body Repairs Limited | Wholesale & retail | 2013 |
| UK Company Address Limited | Administrative & support | 2025 |
| UK Mining Ventures Limited | Mining & quarrying | 2017 |
| UK Safety Solutions Group Ltd | Education | 2026 |
| UK Wainh Limited | Manufacturing | 2015 |
| Umaghp Limited | Health & social care | 2022 |
| Umbra Somerset Ltd | Real estate | 2000 |
| Ummah Global Ltd | Wholesale & retail | 2025 |
| Unafor Ltd | Professional & scientific | 2022 |
| Uncle Festers PUB Co Limited | Hospitality | 2024 |
| Underhayes Court Property Management Company Ltd | Households | 2018 |
| Unifypro Technologies Ltd | Information & communication | 2023 |
| Universal Assignments Limited | Administrative & support | 1987 |
| Unnecessary Logo LLP | | 2023 |
| Urban FOX SD Ltd | Education | 2025 |
| Urban Taxi and Travel Ltd | Extraterritorial | 2024 |
| Urban Trending Limited | Wholesale & retail | 2016 |
| Uservox Limited | Professional & scientific | 2010 |
| Utazo Spirits Ltd | Manufacturing | 2022 |
| V & C Sales Limited | Wholesale & retail | 2017 |
| V B Aesthetics & Training Academy Limited | Other services | 2021 |
| V16 Studios Limited | Professional & scientific | 2011 |
| V4UCARE Limited | Administrative & support | 2017 |
| Vaer Heldig Limited | Professional & scientific | 2016 |
| Vale House Produce Limited | Administrative & support | 2012 |
| Valeside Roofing Ltd | Construction | 2025 |
| Valkyrie Security Services Ltd | Administrative & support | 2025 |
| Valuebrand Limited | Extraterritorial | 2013 |
| Vanbus Limited | Manufacturing | 2003 |
| Vask Property Ltd | Real estate | 2020 |
| VASSY70 Limited | Health & social care | 2016 |
| Vedmed Limited | Health & social care | 2024 |
| Veltomobile Ltd | Wholesale & retail | 2025 |
| Ventura Events Ltd | Arts & recreation | 2025 |
| Verano Construction Services Limited | Professional & scientific | 2019 |
| Verngrove Ltd | Professional & scientific | 2024 |
| Veterinary Insurance Agency Limited | Extraterritorial | 2004 |
| Veterinary Task Force Ltd | Professional & scientific | 2021 |
| VGG Limited | Wholesale & retail | 1984 |
| Vibraject (UK) Limited | Financial services | 2010 |
| Victoria Garage (Chard) Limited | Wholesale & retail | 2010 |
| Vigi Traders Limited | Wholesale & retail | 2016 |
| Vilba Ltd | Health & social care | 2021 |
| Vision Property Maintenance Limited | Construction | 2026 |
| Vision Style Ltd | Health & social care | 2024 |
| Visumind Limited | Information & communication | 2017 |
| Vivienne Clifford Limited | Health & social care | 2009 |
| Voltmotion Ebike Ltd | Wholesale & retail | 2025 |
| Vonnerose Ltd | Professional & scientific | 2014 |
| VTM Holdings Limited | Financial services | 2023 |
| Vurge Ltd | Information & communication | 2018 |
| Vyfly Limited | Information & communication | 2017 |
| W C Pearce Limited | Construction | 2003 |
| W J Higgins & SON Limited | Agriculture & fishing | 2022 |
| W K Windows Limited | Construction | 2003 |
| W M Seals Limited | Manufacturing | 2021 |
| W S Electrical Engineering Ltd | Manufacturing | 2018 |
| W.J.G. Storefitters Limited | Construction | 1997 |
| W.L. Duffield & Sons Limited | Manufacturing | 1936 |
| WA Community Enterprises Limited | Education | 2014 |
| WAH Ying Place Limited | Hospitality | 2025 |
| WAH Ying Trading Limited | Hospitality | 2021 |
| Wainscot Interiors Limited | Construction | 2009 |
| Walcot Street Apartments Management Company Limited | Households | 2024 |
| Warthog Enterprises Limited | Professional & scientific | 2012 |
| Waste-Ex Ltd | Professional & scientific | 2025 |
| Waterloo Music (Yeovil) Limited | Wholesale & retail | 2023 |
| Waters-Edge Escapes Ltd | Real estate | 2026 |
| Watly Engineering Limited | Manufacturing | 2016 |
| Wayfarer Productions Ltd | Administrative & support | 1996 |
| WCS Group Limited | Financial services | 2019 |
| WD Meddev Limited | Health & social care | 2023 |