| THE New Start Brand Ltd | Arts & recreation | 2019 |
| THE Old Vineyard Management Company Limited | Households | 2003 |
| THE Open Healthcare Partnership Limited | Health & social care | 2025 |
| THE P&S Property Group Ltd | Construction | 2025 |
| THE Pilates Corner Ltd | Arts & recreation | 2021 |
| THE Pines Studio (Baldock) Ltd | Arts & recreation | 2025 |
| THE Production Exchange (Trading) 2 Limited | Arts & recreation | 2015 |
| THE Production Exchange Limited | Arts & recreation | 2013 |
| THE Saddle Room Limited | Agriculture & fishing | 2026 |
| THE School House Freehold Limited | Households | 2026 |
| THE Space Wellness Group Ltd | Health & social care | 2026 |
| THE Uniform Monkeys Ltd | Manufacturing | 2017 |
| THE Wright Accounts Services Ltd | Professional & scientific | 2014 |
| THE Wyndham Centre Limited | Health & social care | 1997 |
| Thegreenduck Limited | Hospitality | 2024 |
| Thermal Cameras UK Limited | Professional & scientific | 2016 |
| These Days Limited | Professional & scientific | 2022 |
| Thesupplyunit Ltd | Wholesale & retail | 2023 |
| Thinkling (UK) Limited | Administrative & support | 2005 |
| Thorpe Property Holdings Limited | Real estate | 2025 |
| Timebox Consulting Ltd | Information & communication | 2015 |
| Tower Flower Ltd | Wholesale & retail | 2013 |
| Townhouse Creative Limited | Wholesale & retail | 2012 |
| TPE (Productions) 2 Limited | Arts & recreation | 2024 |
| Trans World Fuels Ltd | Mining & quarrying | 2012 |
| Trathen Ltd | Professional & scientific | 2023 |
| Travel Spot Europe Limited | Wholesale & retail | 2016 |
| Treadaway Electrical Services Ltd | Construction | 2008 |
| Treadaway Property Limited | Construction | 2018 |
| True Body Clinic Ltd | Other services | 2024 |
| True Body Fitness Ltd | Arts & recreation | 2024 |
| True POS Limited | Wholesale & retail | 2016 |
| Trusted Security Ltd | Administrative & support | 2023 |
| Tuck Into Ltd | Hospitality | 2026 |
| TX Corporation Ltd | Information & communication | 2011 |
| UK Final Touch Ltd | Professional & scientific | 2012 |
| Universal Energy Group Limited | Financial services | 2025 |
| Universal GAS Solutions Ltd | Professional & scientific | 2019 |
| Upton Electrical Ltd | Construction | 2009 |
| Utility Connection Management Ltd | Construction | 2026 |
| Uztheman Limited | Construction | 2016 |
| Varto Kebab Ltd | Hospitality | 2024 |
| Vaux Spares Ltd | Wholesale & retail | 2014 |
| VC Distribution Ltd | Wholesale & retail | 2025 |
| VEL Post Ltd | Wholesale & retail | 2025 |
| Veloce Club Limited | Wholesale & retail | 2021 |
| Veteran Car Club Limited | Other services | 2008 |
| Veteran Car Club of Great Britain Limited | Other services | 2008 |
| Vimbairose Ltd | Health & social care | 2019 |
| Vinnovation Limited | Wholesale & retail | 2022 |
| VKG Estates Limited | Real estate | 2016 |
| W Firkins & Partners Limited | Construction | 2003 |
| W G Silverton & Co Limited | Construction | 1970 |
| Walkers Court (Baldock) Management Company Limited | Households | 2022 |
| Wardrop Minerals Management Limited | Mining & quarrying | 2013 |
| Watlebury Ltd. | Real estate | 2014 |
| Watts Roofing Supplies Ltd | Construction | 2010 |
| Wellness Therapy 4U Ltd | Other services | 2019 |
| West and East Anglian Asbestos Removals (Contracts) Limited | Water & waste | 2005 |
| Westbury Farm (Ashwell) Management Co Limited | Households | 1998 |
| Westminster Maintenance Limited | Construction | 2010 |
| Weston Estates Limited | Households | 1993 |
| White Star Holdings Limited | Real estate | 2015 |
| Whitehorse Chambers Management Limited | Real estate | 2009 |
| Whitehorse ST. Management Limited | Extraterritorial | 2014 |
| Whsst Ltd | Professional & scientific | 2022 |
| Winton Court Consultancy Limited | Extraterritorial | 1998 |
| Winwell Limited | Health & social care | 2019 |
| Wood FOX Carpentry Limited | Construction | 2022 |
| Woodville Project Limited | Administrative & support | 2015 |
| Xdtec Technical Services Limited | Other services | 2007 |
| XO Cabs Ltd | Transport & logistics | 2024 |
| YOU Sauna Hitchin Limited | Arts & recreation | 2025 |
| Zooperheiss Limited | Professional & scientific | 2020 |
| Zume Consultants Ltd | Information & communication | 2005 |
| Zwilling J a Henckels (UK) Limited | Wholesale & retail | 2006 |