| Thunderclap Limited | Wholesale & retail | 2025 |
| Tibbs Tree Surgeons Ltd | Agriculture & fishing | 2013 |
| Tiggers Scenic Department Limited | Professional & scientific | 2007 |
| Tillfix Limited | Manufacturing | 2003 |
| TIM Layzell Ltd | Professional & scientific | 2014 |
| Time OUT Health & Wellness Ltd | Health & social care | 2019 |
| Tincknell Fuels (Holdings) Limited | Professional & scientific | 2006 |
| Tincknell Fuels Limited | Wholesale & retail | 1972 |
| Tincknell Property Ltd | Real estate | 2015 |
| Tincknells Limited | Professional & scientific | 2006 |
| Tinit Ltd | Wholesale & retail | 2022 |
| Tixly Ltd | Information & communication | 2020 |
| TLP Media Limited | Wholesale & retail | 2026 |
| Toben Electric Limited | Construction | 2022 |
| Toby Ford Ltd | Agriculture & fishing | 2012 |
| Token Outfitters Limited | Wholesale & retail | 2023 |
| Tollgate Security Alarms Limited | Administrative & support | 1999 |
| Tollgate Security Ltd | Administrative & support | 1997 |
| TOM Laurie Construction Ltd | Construction | 2025 |
| Toniqwa Ltd | Professional & scientific | 2016 |
| Tony Hogg Design Ltd. | Professional & scientific | 2002 |
| Toogood Fitness & Nutrition Ltd | Arts & recreation | 2024 |
| Top Cover Solutions Limited | Administrative & support | 2007 |
| Top Cover Solutions Management Limited | Administrative & support | 2022 |
| TOR Estates Limited | Real estate | 2002 |
| TOR Events Co Ltd | Hospitality | 2025 |
| TOR Farm Ltd | Real estate | 2015 |
| Torn Ltd | Information & communication | 2006 |
| Tortechs Limited | Information & communication | 2026 |
| Total Football Solutions Ltd | Education | 2019 |
| Total Vehicle Systems Limited | Wholesale & retail | 2010 |
| Touchtech Consulting Limited | Information & communication | 2008 |
| Town and Country Hot Tubs Ltd | Wholesale & retail | 2019 |
| Trade Reply Ltd | Information & communication | 2026 |
| Tranquil Touring Parks Limited | Hospitality | 2009 |
| Travel Tots Ltd | Wholesale & retail | 2011 |
| TRD Motorsport Limited | Wholesale & retail | 2015 |
| Treasure Island Sweets Ltd | Wholesale & retail | 2010 |
| Tree House Day Nurseries Limited | Education | 2003 |
| Trevor Sandiford Limited | Agriculture & fishing | 2003 |
| TRS Group UK Holdings Limited | Financial services | 2026 |
| True Civil Engineering Limited | Construction | 2004 |
| Tscmi Limited | Other services | 2010 |
| TST Protection Ltd | Wholesale & retail | 2020 |
| Tucker Farm Services Limited | Agriculture & fishing | 1997 |
| Tukosawa Ltd. | Wholesale & retail | 2016 |
| Turner Planning and Design Limited | Professional & scientific | 2016 |
| Turnhaus Projects Ltd | Real estate | 2025 |
| TV, Film & Event Production Services Ltd | Information & communication | 2019 |
| Twelvetrees Accommodation Agency Ltd | Real estate | 2018 |
| Twelvetrees Accommodation Limited | Real estate | 2003 |
| Twelvetrees Management Company Limited | Real estate | 2001 |
| Two Eleven (Somerset) Limited | Real estate | 2025 |
| Two Four Alton Limited | Construction | 2013 |
| UK Competitions Ltd | Professional & scientific | 2021 |
| Ultra Warehouse Limited | Real estate | 2025 |
| Ultrafine Aluminium Global Ltd | Construction | 2015 |
| Ultramarine Safety Ltd | Professional & scientific | 2015 |
| Umami-Wells Limited | Hospitality | 2024 |
| Underocean Limited | Public administration | 2023 |
| Underwood Car and Commercial Limited | Wholesale & retail | 1997 |
| Uniqye Barber Ltd | Other services | 2024 |
| Unity Facilities Management Limited | Administrative & support | 2023 |
| Unprecedented Ltd | Manufacturing | 2020 |
| Ursus Arctos Unlimited | Financial services | 2024 |
| Uveloped Ltd | Information & communication | 2023 |
| Vale Foundings Limited | Real estate | 2019 |
| Valley Marble and Granite Limited | Construction | 2007 |
| Vally Construction Ltd | Construction | 2017 |
| Vehicle Life Support Limited | Wholesale & retail | 2008 |
| Verde Engineering Ltd | Professional & scientific | 2024 |
| Veridian Solar Ltd | Construction | 2025 |
| Very Meta Limited | Information & communication | 2014 |
| Viabill Limited | Construction | 1991 |
| Vicinitas Ltd | Professional & scientific | 2024 |
| Vines Business Services Ltd | Professional & scientific | 2006 |
| Virtual Finance Office Limited | Professional & scientific | 2021 |
| Visibell Limited | Real estate | 1950 |
| Vista Cloud Ventures Limited | Administrative & support | 2010 |
| Vitesse Management Services Ltd | Professional & scientific | 2009 |
| VNS Contracting Ltd | Professional & scientific | 2020 |
| Vobster BED and Breakfast Ltd | Hospitality | 2018 |
| Volante Consulting Ltd | Professional & scientific | 2012 |
| W S Brister & SON Ltd | Other services | 2013 |
| W S Fabrications Limited | Manufacturing | 2000 |
| W. J. KEW (Contractors) Limited | Construction | 1934 |
| W.H.C. Holdings Limited | Extraterritorial | 1989 |
| WA & SON Groundworks Ltd | Construction | 2024 |
| Waldegrave Farms Limited | Agriculture & fishing | 1978 |
| Wallcrest Limited | Agriculture & fishing | 2011 |
| Wallis Properties (Management) Limited | Real estate | 2018 |
| Wanderlands Environmental Bank Limited | Professional & scientific | 2021 |
| Warm Salad Limited | Arts & recreation | 2008 |
| Water Clear Global UK Ltd | Water & waste | 2025 |
| Wayopen Estates Limited | Construction | 1985 |
| Wctb Events Ltd | Other services | 2023 |
| WD & AC Hann Limited | Wholesale & retail | 2002 |
| WE Accept Pets Limited | Professional & scientific | 2009 |
| Webbs Garage ( Southover ) Limited | Wholesale & retail | 2014 |
| Wedding Bidder Ltd | Other services | 2024 |