| Toddlers-In Nursery School Ltd | Health & social care | 2012 |
| Together Holdings Ltd | Professional & scientific | 2018 |
| TOM Ward Racing Limited | Arts & recreation | 2019 |
| Tomorrow's Guides Limited | Information & communication | 1994 |
| Tomorrow's NET Ltd | Information & communication | 2000 |
| Tony Green Commercials Limited | Wholesale & retail | 1998 |
| Topper Chimney Sweeps Ltd | Administrative & support | 2018 |
| Total Pressure Limited | Construction | 2013 |
| TR Composites Ltd | Professional & scientific | 2013 |
| Tracey Richardson Consulting Ltd | Other services | 2023 |
| Traffic Safety Solutions Ltd | Professional & scientific | 2013 |
| Tregew Farm Limited | Real estate | 2019 |
| Trimax Technologies Limited | Professional & scientific | 2021 |
| Trinity Park Stud Ltd | Agriculture & fishing | 2013 |
| Troy Innovations Limited | Manufacturing | 2023 |
| TT Display Furniture Limited | Real estate | 2009 |
| TT Holdings Group Limited | Financial services | 2018 |
| TT Manufacturing Limited | Construction | 2010 |
| TT Solutions & Interiors Limited | Administrative & support | 2006 |
| Twin Cities Ltd | Administrative & support | 2025 |
| TWL Plumbing & Heating Limited | Construction | 2017 |
| Two Cocks Farm Limited | Agriculture & fishing | 2016 |
| Two Rhodes Ltd | Professional & scientific | 2012 |
| Twre Consult Ltd | Administrative & support | 2024 |
| TY Trading Limited | Construction | 2017 |
| Tyrecellar Ltd | Wholesale & retail | 2025 |
| Tyto Consultancy Limited | Professional & scientific | 2006 |
| U K Land Ltd. | Real estate | 1991 |
| Udss Corporate Holdings Limited | Public administration | 2021 |
| UK Conversions Limited | Construction | 2024 |
| UKL Bidco (CB) Ltd | Financial services | 2025 |
| UKL Hyperion Limited | Financial services | 2024 |
| UKO Holdings Limited | Real estate | 2019 |
| UKO Serviced Offices Limited | Real estate | 1971 |
| Ultimate Signs Limited | Professional & scientific | 2024 |
| Unibraze Ltd | Information & communication | 2025 |
| Union Torquay NO.1 Limited | Real estate | 2023 |
| Universal Defence and Security Solutions Limited | Professional & scientific | 2017 |
| Universal Recruitment and Interim Solutions Limited | Administrative & support | 2021 |
| Universal Renovations & Carpentry Ltd | Construction | 2005 |
| Universal Store Groups Ltd | Wholesale & retail | 2019 |
| UPE Engineering Limited | Manufacturing | 2001 |
| UPE Motorsport Ltd | Extraterritorial | 2017 |
| Urbanite Planning Ltd | Professional & scientific | 2020 |
| Uvera Investments Limited | Real estate | 2026 |
| Valley Cars and Classics Ltd | Wholesale & retail | 2015 |
| Vanaheim Systems Limited | Information & communication | 2026 |
| Vanrenen Fabrics Ltd | Professional & scientific | 2016 |
| Vanrenen Hanbury Ltd | Professional & scientific | 2017 |
| Vector Land Limited | Real estate | 2006 |
| Venu Inns Limited | Hospitality | 2013 |
| Vertical Vision Limited | Manufacturing | 2001 |
| Very Handy Ltd | Manufacturing | 2025 |
| View Asset Group Limited | Financial services | 2025 |
| View Property Consultants Limited | Professional & scientific | 2021 |
| View Property Holdings Limited | Real estate | 2021 |
| Vigo Software Limited | Information & communication | 1998 |
| Viking Security Product Ltd | Wholesale & retail | 2020 |
| Vivace Motorsport Ltd | Professional & scientific | 2020 |
| VJW Insights Ltd | Information & communication | 2021 |
| W.A. Building Services Ltd | Construction | 2014 |
| Wall 2 Wall Builders Limited | Construction | 2023 |
| Wallern Bluebell Limited | Administrative & support | 2025 |
| Washbrook Limited | Real estate | 1996 |
| Washstation Limited | Administrative & support | 2019 |
| Washwater Properties Limited | Real estate | 2018 |
| Water Claim Solutions Limited | Construction | 2025 |
| Water Drop Limited | Professional & scientific | 2013 |
| Watkins Motor Company Limited | Wholesale & retail | 2021 |
| WE Love Pets (Romford & Barnet) Ltd | Other services | 2019 |
| WE Love Pets West Berkshire Ltd | Other services | 2017 |
| Webs Property Ltd | Real estate | 2018 |
| Wellth by Lily Limited | Health & social care | 2025 |
| Wescott Services Ltd | Administrative & support | 2019 |
| Wessex Biofuels Ltd | Agriculture & fishing | 2009 |
| Wessex Features and Photos Limited | Information & communication | 2000 |
| Wessex Woodland Holdings Ltd | Financial services | 2021 |
| Wessex Woodland Management Limited | Agriculture & fishing | 1993 |
| West Berkshire Injury Clinic Ltd | Health & social care | 2019 |
| West Ella Estates Limited | Real estate | 1976 |
| West Streatham Holdings Limited | Financial services | 2023 |
| Westbrook Cars Limited | Transport & logistics | 2016 |
| Westfield Distribution Limited | Manufacturing | 1987 |
| Weston Gate (Weston) Management Company Limited | Households | 2015 |
| Westwood Contracts Limited | Construction | 1993 |
| Wetherdown Limited | Real estate | 1996 |
| Whatever. Sweats Limited | Wholesale & retail | 2024 |
| Whatice Ltd | Wholesale & retail | 2018 |
| White Hart Property Services & Maintenance Ltd | Construction | 2024 |
| White Horse Building Consultancy Ltd | Real estate | 2025 |
| White Horse Groups Ltd | Agriculture & fishing | 2025 |
| White Horse Media Ltd | Professional & scientific | 2024 |
| White Horse Telecom Limited | Information & communication | 2006 |
| White Mulberry Limited | Manufacturing | 2020 |
| White Northover Contractors Ltd | Administrative & support | 2022 |
| White Northover Property Ltd | Construction | 2023 |
| Whitecroft Chippy Limited | Wholesale & retail | 2023 |
| Whitefriars (Coachworks) Limited | Real estate | 1987 |
| Whitewoodco Ltd | Manufacturing | 2022 |
| Whittingtons Fish Bar Limited | Hospitality | 2026 |