| Trevor Williams Woodcrafts Limited | Manufacturing | 2016 |
| Triewe Ltd | Administrative & support | 2017 |
| Triple Eight Partnership Limited | Professional & scientific | 2015 |
| Triple Media UK Limited | Professional & scientific | 2014 |
| Tristenagh Consulting Ltd | Professional & scientific | 2019 |
| TRM Motors Limited | Wholesale & retail | 2016 |
| Trojand Limited | Professional & scientific | 2016 |
| Troutbeck Guest House LLP | | 2017 |
| Trustwise UK Limited | Professional & scientific | 2022 |
| TSF Total Support Force Ltd | Administrative & support | 2014 |
| TSH Limited | Other services | 2005 |
| Tundra Jewellers Ltd | Wholesale & retail | 2014 |
| Turners of Erlestoke Limited | Wholesale & retail | 2005 |
| Twelve Pearls Kebab Ltd | Hospitality | 2024 |
| TWG Electrical Ltd | Construction | 2021 |
| TWG Mechanical Ltd | Extraterritorial | 2017 |
| TWH Property Management Limited | Real estate | 2025 |
| Twinkle Tots Photography Ltd | Professional & scientific | 2023 |
| TYE Engineering Limited | Manufacturing | 2006 |
| Tyler Redmore Limited | Professional & scientific | 2010 |
| Typhon Group Limited | Administrative & support | 2016 |
| Typhon Investment Holding Co Limited | Administrative & support | 2018 |
| Typhon Systems Limited | Administrative & support | 2023 |
| Typhon Tactical Limited | Administrative & support | 2023 |
| Tytherton HAY & Straw Ltd | Agriculture & fishing | 2019 |
| Tytherton Holdings Ltd | Agriculture & fishing | 2024 |
| Uavision Ltd | Manufacturing | 2012 |
| UK Vacuum Pack Solutions Ltd | Administrative & support | 2022 |
| Uk-Eu Oak Limited | Wholesale & retail | 2025 |
| Ultraviolet Marketing Ltd | Administrative & support | 2015 |
| Uncommon Ground Consulting Limited | Professional & scientific | 2021 |
| Unit 97 I.T. Limited | Information & communication | 2025 |
| United Agriculture Limited | Administrative & support | 1993 |
| United Oilseeds Marketing Limited | Agriculture & fishing | 1979 |
| United Pulses Limited | Agriculture & fishing | 2025 |
| Urban Rustics Limited | Wholesale & retail | 2002 |
| Urchfont Vehicles Limited | Wholesale & retail | 2016 |
| Ursine Vulpine Limited | Information & communication | 2016 |
| V&B Ltd | Other services | 2025 |
| Vagsuk Limited | Wholesale & retail | 2020 |
| Vale Oils Ltd | Wholesale & retail | 2019 |
| Valley Plants Ltd | Wholesale & retail | 2019 |
| Varivane Industries Limited | Manufacturing | 1964 |
| Vaughan's Cookery School Limited | Education | 2025 |
| Velocity Recruitment Limited | Administrative & support | 2006 |
| Vert TEX Limited | Professional & scientific | 2017 |
| Video and TV Ltd | Administrative & support | 2014 |
| Village Serviced Offices Ltd | Real estate | 2010 |
| Vinnaix Limited | Information & communication | 2025 |
| Viva LA Vevers Ltd | Hospitality | 2026 |
| Vivid Stitches Limited | Wholesale & retail | 2007 |
| Voiceovergirl Ltd | Information & communication | 2011 |
| Vooght Energy Consulting Limited | Professional & scientific | 2024 |
| W Plus W Ltd | Professional & scientific | 2020 |
| Wadworth and Company EBT Trustee Limited | Manufacturing | 2026 |
| Wadworth and Company Limited | Manufacturing | 1889 |
| Wagstaffes of Devizes Ltd | Hospitality | 2023 |
| Walden's Wines Ltd | Wholesale & retail | 2020 |
| Walker Technology Limited | Professional & scientific | 2014 |
| Walter Lawrence Trophy Limited | Arts & recreation | 2007 |
| Wansbroughs LLP | | 2022 |
| Watson & Haig Grain Systems Ltd | Agriculture & fishing | 2017 |
| Watson Allen Ltd | Extraterritorial | 2013 |
| WAV Services Ltd | Information & communication | 2020 |
| Wayfinder Solutions Ltd | Professional & scientific | 2022 |
| WE ARE Golden Limited | Administrative & support | 2013 |
| WE ARE Golden Mgmt Ltd | Information & communication | 2022 |
| WE Conneqt Limited | Information & communication | 2020 |
| Webb Fire and Security Limited | Administrative & support | 2006 |
| Webborn Nuclear Safety Consultants Limited | Other services | 2017 |
| Wellness Curated Worldwide Limited | Health & social care | 2021 |
| Weloveurchfont Ltd | Health & social care | 2025 |
| Wensemble Ltd | Professional & scientific | 2026 |
| Wensley Stock Limited | Information & communication | 2017 |
| Wentrow Media Limited | Information & communication | 1999 |
| Wessex Equine Dental Services Ltd | Professional & scientific | 2019 |
| Wessex Housing Association Limited | Professional & scientific | 2003 |
| Wessex Nutrition Holdings Ltd | Financial services | 2019 |
| Wessex Tree Care Limited | Administrative & support | 2003 |
| West of England Ordnance Company Limited | Manufacturing | 2024 |
| West Ridge (Devizes) Management Limited | Households | 1999 |
| West View Crescent Management Company Ltd | Households | 2019 |
| West Wiltshire Digital Radio CIC | Information & communication | 2022 |
| Westbrook Agri Ltd | Wholesale & retail | 2022 |
| Westbury Building Supplies Limited | Administrative & support | 1996 |
| Westbury Road (Warminster) Management Company Limited | Households | 2001 |
| Westwoofs Limited | Other services | 2023 |
| Wetwoofs Limited | Other services | 2023 |
| WH Landscape Consultancy Limited | Administrative & support | 2008 |
| Where's Whippy Ltd | Information & communication | 2024 |
| Whirlwind Films Ltd | Information & communication | 2020 |
| Whistley Therapy Ltd | Health & social care | 2024 |
| White Horse Arts CIC | Arts & recreation | 2023 |
| White Light Consulting Ltd | Professional & scientific | 2013 |
| Wideconcept Property Management Limited | Households | 1999 |
| Wild Urban Spaces Limited | Agriculture & fishing | 2020 |
| Wildersmouth Court Residents Company Limited | Households | 2004 |
| Wilkinson Plumbing & Heating Ltd | Construction | 2025 |
| Will Atkinson Limited | Information & communication | 2017 |
| Will Owen Ltd | Professional & scientific | 2017 |