| Timber Millers Limited | Manufacturing | 2014 |
| Time Capsule Productions Ltd | Information & communication | 2024 |
| Titan Enterprises Limited | Manufacturing | 1981 |
| Tmcm Limited | Professional & scientific | 2010 |
| TMT Music Ltd | Arts & recreation | 2019 |
| Toho Capital Services (UK) Limited | Administrative & support | 2019 |
| TOM Besley Ltd | Arts & recreation | 2019 |
| TOM Meyer Plumbing & Heating Ltd | Construction | 2022 |
| TOM Richardson Production Ltd | Information & communication | 2015 |
| TOM Roberts Associates Limited | Professional & scientific | 2004 |
| Tomtom Services Ltd | Agriculture & fishing | 2009 |
| Tooka Ltd | Wholesale & retail | 2017 |
| Topball CIC | Arts & recreation | 2022 |
| Tostada Ltd | Hospitality | 2024 |
| Townsend Electrical Contracting Ltd | Construction | 2026 |
| Toy Safety Experts Limited | Professional & scientific | 2012 |
| TPG Sales & Services Limited | Real estate | 1999 |
| Tpgw Ltd | Construction | 2021 |
| TR & SR Cuff Limited | Agriculture & fishing | 2013 |
| Traditional Glazing and Joinery Ltd | Construction | 2013 |
| Treeassic Arbor Ltd | Agriculture & fishing | 2024 |
| Tregoose Consulting Limited | Professional & scientific | 2023 |
| Trevor Birchall Agriculture Limited | Wholesale & retail | 2002 |
| Trojan Wellbeing Ltd | Other services | 2021 |
| Trouvaille Gallery Limited | Wholesale & retail | 2024 |
| Truffle PIG Farming Limited | Agriculture & fishing | 2025 |
| Trull LVA LLP | | 2020 |
| Tudor Books Limited | Wholesale & retail | 2002 |
| Twisted Cider Limited | Manufacturing | 2022 |
| TZZ Estates Limited | Real estate | 1997 |
| UK Expat Limited | Professional & scientific | 2002 |
| Uncle Byron Ltd | Other services | 2017 |
| United Consulting Partners Ltd | Construction | 2013 |
| Untamed Venison Limited | Agriculture & fishing | 2024 |
| Unwrap Ltd | Professional & scientific | 2023 |
| UP and Running Drainage Limited | Water & waste | 2026 |
| Upstairs Downstairs Interiors Limited | Wholesale & retail | 2013 |
| Urban Data Analysts Ltd | Information & communication | 2017 |
| Urban Good Community Interest Company | Professional & scientific | 2017 |
| Urban Radicals LLP | | 2021 |
| Urbanics Limited | Professional & scientific | 2021 |
| Urchfont LVA LLP | | 2014 |
| Vale Auto Services Limited | Wholesale & retail | 2008 |
| Valmiera Glass UK Limited | Manufacturing | 1987 |
| Vanarack Automotive Accessories Limited | Wholesale & retail | 2017 |
| Vanarack Holdings Ltd | Financial services | 2024 |
| Vantrax Ltd | Wholesale & retail | 2024 |
| Venn Farm Partnership Limited | Agriculture & fishing | 2006 |
| Venn Farm Racing Limited | Arts & recreation | 2006 |
| Venoli Investments Limited | Professional & scientific | 2020 |
| Venus PM Ltd | Construction | 2019 |
| Veriton Consulting Ltd | Information & communication | 2023 |
| Vetted Media Ltd | Professional & scientific | 2024 |
| Victoria O'Brien Ltd | Hospitality | 2018 |
| Visie Communications Ltd | Professional & scientific | 2020 |
| VMJ Creative Limited | Arts & recreation | 2024 |
| VTT Limited | Administrative & support | 1986 |
| W Brophy Ltd | Information & communication | 2023 |
| Wadebridge LVA LLP | | 2022 |
| Walton LVA LLP | | 2014 |
| Walton Main Street LVA LLP | | 2019 |
| Wang Bar Music Limited | Arts & recreation | 2001 |
| Ward Heating Limited | Construction | 2021 |
| Warfare Development Solutions Ltd | Manufacturing | 2012 |
| Waterline Systems Limited | Manufacturing | 2010 |
| Watkinson Consulting Ltd | Professional & scientific | 2018 |
| Wattworx Ltd | Information & communication | 2025 |
| Waverlawn Residents Association Limited | Households | 2014 |
| Wayne Pullen Family Butchers Limited | Wholesale & retail | 2010 |
| Wcwraps Ltd | Wholesale & retail | 2018 |
| WE FIX Drains Ltd | Construction | 2023 |
| Wearever Limited | Professional & scientific | 2021 |
| Wecleanwindows Ltd | Administrative & support | 2024 |
| Welcome Flats Consortium Mere Ltd | Households | 1998 |
| Wellington LVA LLP | | 2021 |
| Wells Creative Limited | Manufacturing | 2023 |
| Wells LVA LLP | | 2017 |
| Wessex Agri Services Ltd | Agriculture & fishing | 2013 |
| Wessex Ceramic Tiling Limited | Construction | 2007 |
| Wessex Spectacle Company Ltd | Other services | 2017 |
| West Country Vintage Ltd | Administrative & support | 2016 |
| West Huntspill LVA LLP | | 2017 |
| West Landkey and Mount Sandford Holdings LVA LLP | | 2026 |
| West Landkey LVA LLP | | 2023 |
| West Stafford LVA LLP | | 2014 |
| Westbury LVA LLP | | 2017 |
| Westcountry Lifts Ltd | Professional & scientific | 2018 |
| Westland Sports Football Club Limited | Arts & recreation | 2025 |
| Wharfedale Business Performance Limited | Administrative & support | 2015 |
| Whatnots Trading Ltd | Wholesale & retail | 2019 |
| Wheathill Watts Investment Ltd | Wholesale & retail | 2009 |
| Wheatsheaf Farm Holding Company Ltd | Hospitality | 2020 |
| Whippa Snappa Ltd | Manufacturing | 2023 |
| Whites Yard (Castle Cary) Management Limited | Real estate | 2007 |
| Whole Range Ltd | Wholesale & retail | 2020 |
| Wigley Holdings Ltd | Financial services | 2024 |
| Wilcom Estates Limited | Construction | 2024 |
| Wild Ferment Ltd | Wholesale & retail | 2015 |
| Wild Horse Cleaning Solutions Ltd | Administrative & support | 2023 |
| Will Vincent Consultancy Ltd | Professional & scientific | 2018 |