| Toosey Investments Ltd | Real estate | 2019 |
| Total Connections 2009 Ltd | Manufacturing | 2009 |
| Towerserve Investments Ltd | Real estate | 2024 |
| Towerserve Property Management Ltd | Hospitality | 2024 |
| Townsend Farming & Contracting Ltd | Agriculture & fishing | 2022 |
| Trackss Ltd | Education | 2000 |
| Tracy's Comfort Food Ltd | Hospitality | 2025 |
| Trailermate Ltd | Professional & scientific | 2026 |
| Travel and Tourism Tax Advice Ltd | Professional & scientific | 2023 |
| Travel Palace Limited | Administrative & support | 2023 |
| Treasure Made Landscapes Ltd | Administrative & support | 2024 |
| Trebble Consultancy Limited | Administrative & support | 2015 |
| Tribu Properties Limited | Real estate | 2019 |
| Trio Sage Ltd | Construction | 2024 |
| Trip Aunty Ltd | Administrative & support | 2021 |
| TS Fire Limited | Other services | 2017 |
| TST Marquees of Wiltshire Ltd | Administrative & support | 2023 |
| TST Shading Ltd | Manufacturing | 2020 |
| Ttfitness Hub Ltd | Arts & recreation | 2020 |
| TTT Holdings Limited | Arts & recreation | 2024 |
| Tttc Limited | Other services | 2025 |
| Tubbison Limited | Information & communication | 2008 |
| Tucker Spain Limited | Real estate | 2014 |
| Turner Landscapes Limited | Construction | 2006 |
| Twins Toys Ltd | Wholesale & retail | 2025 |
| Two Cockatoos Limited | Manufacturing | 2016 |
| Two Ravens Ltd | Real estate | 2015 |
| Two Voices Ltd | Arts & recreation | 2025 |
| TWS Plumbing & Heating Limited | Construction | 2010 |
| UAK Investments Ltd | Real estate | 2022 |
| UC Catering Limited | Hospitality | 2017 |
| Uchi Investments Ltd | Financial services | 2020 |
| Uklda Ltd | Administrative & support | 2020 |
| Ulaga Tamizhar Ltd | Information & communication | 2025 |
| Ultra-Warm Holdings Limited | Financial services | 2005 |
| Ultra-Warm Limited | Construction | 1970 |
| Understeer Ltd | Real estate | 2020 |
| Undiscoverable Solutions Ltd | Information & communication | 2023 |
| Urban Pro Property Ltd | Real estate | 2017 |
| V & T'S Cafe Lounge Ltd | Hospitality | 2024 |
| Vainio Group Ltd | Manufacturing | 2025 |
| Valley View Fencing and Landscaping Limited | Construction | 2017 |
| Vanguard Neurodiversity Training Ltd | Education | 2019 |
| Vanity FUR Grooming by Emily Limited | Other services | 2022 |
| Vans Pods and Huts UK Ltd | Manufacturing | 2026 |
| Vardent Developments Ltd | Real estate | 2017 |
| VAT Advice Centre Ltd | Extraterritorial | 2018 |
| VB Electrical Services Ltd | Construction | 2022 |
| Velvet Tiger Ltd | Information & communication | 2020 |
| Vera Vita Ltd | Extraterritorial | 2025 |
| Viking Technical Ltd | Information & communication | 2011 |
| Villa Castanea Ltd | Hospitality | 2023 |
| Vitruv Property Ltd | Real estate | 2021 |
| Vulcan Passive Fire Protection Ltd | Construction | 2024 |
| Wabi+ Ltd | Wholesale & retail | 2018 |
| Wakefield Extended Realities Ltd | Professional & scientific | 2021 |
| Waste Leads Ltd | Professional & scientific | 2025 |
| WB Construction Management Ltd | Professional & scientific | 2023 |
| WBM Block Two Ltd | Construction | 2024 |
| WBM Property Investments Ltd | Real estate | 2021 |
| Webb Hire Ltd | Administrative & support | 2015 |
| Webcox Engineering Limited | Construction | 1979 |
| Webcox Holdings Limited | Real estate | 2009 |
| Webster & Jones Properties Limited | Real estate | 2022 |
| Webster and Jones Property Solutions Ltd | Real estate | 2023 |
| Wecco Holdings Limited | Professional & scientific | 2019 |
| Well Said Consulting Ltd | Professional & scientific | 2011 |
| Well-Body Limited | Professional & scientific | 2002 |
| Wellington Barn (Events) Ltd | Arts & recreation | 2006 |
| Westbrook Asset Recovery Ltd | Administrative & support | 2024 |
| Westbrook Commercials Limited | Transport & logistics | 2012 |
| Westbrook Green Holdings Ltd | Financial services | 2024 |
| Westbrook Holdings (Wiltshire) Limited | Financial services | 2026 |
| Westpoint Precision Engineering Limited | Manufacturing | 2013 |
| Wheedesign Limited | Information & communication | 2014 |
| Whiston Gray Consulting Ltd | Administrative & support | 2022 |
| White Hart Mews Developments Ltd | Construction | 2021 |
| White Horse Aviation Ltd | Education | 2023 |
| White Horse Drones Ltd | Information & communication | 2024 |
| Wilkins Builders Limited | Construction | 1992 |
| Wilkins Builders Topco Limited | Professional & scientific | 2016 |
| William James Cars Ltd | Wholesale & retail | 2019 |
| William Wilson Marketing Ltd | Professional & scientific | 2024 |
| Wilts Electrical Contracting Limited | Construction | 2004 |
| Wiltshire Hose Ltd | Professional & scientific | 2024 |
| Wiltshire Landscaping Limited | Administrative & support | 2024 |
| Wiltshire Maintenance Limited | Construction | 2014 |
| Wiltshire Waste Alliance Limited | Professional & scientific | 2017 |
| WIN WIN Solutions in Property Ltd. | Real estate | 2018 |
| Windrush Voices C.I.C. | Education | 2026 |
| WIV Global Limited | Wholesale & retail | 2009 |
| WIV Property Holdings Limited | Real estate | 2020 |
| WMD Management Ltd | Households | 2025 |
| Wolsingham Estates Ltd | Real estate | 2017 |
| Woman to Woman & the Male Perspective Ltd | Other services | 2011 |
| Woodminton Limited | Construction | 2003 |
| Wooldridge Car Repairs Ltd | Wholesale & retail | 2025 |
| Wright Electric Company Limited | Manufacturing | 2004 |
| WS Support Ltd | Professional & scientific | 2026 |
| Wyvern Surveyors Asset Management Limited | Real estate | 2023 |