| Therm Green Energy Ltd | Construction | 2023 |
| Think Resi Consulting Ltd | Professional & scientific | 2023 |
| Thinking Space Land Ltd | Construction | 2014 |
| Thinking Space Limited | Professional & scientific | 1996 |
| Third EYE Marketing Limited | Professional & scientific | 2018 |
| Thjkfba Ltd | Wholesale & retail | 2023 |
| Thomas Collingwood Advisory Ltd | Information & communication | 2026 |
| Thomlen Solutions Ltd | Administrative & support | 2025 |
| Thorpefam Holdings Limited | Financial services | 2022 |
| Thorpefam Limited | Real estate | 2022 |
| Thought Sherpa Ltd | Professional & scientific | 2025 |
| TIB Chemicals UK Ltd | Other services | 2020 |
| Tiger Installations Ltd | Construction | 2018 |
| TIM Cowley Ltd | Arts & recreation | 2013 |
| TIM Greenwood & Associates Ltd | Professional & scientific | 2012 |
| Timberland Hills Ltd | Construction | 2019 |
| Timeless Aesthetics With Sarah Ltd | Other services | 2022 |
| Timi Construction Ltd | Construction | 2021 |
| TJ Water Solutions Limited | Manufacturing | 2023 |
| TJG Carpentry and Building Ltd | Construction | 2025 |
| TND Adventures Ltd | Administrative & support | 2025 |
| TOM DE Jager Ltd | Information & communication | 2018 |
| TOM Jennion Ltd | Arts & recreation | 2018 |
| Tomorrow 32 Limited | Financial services | 2018 |
| Tony Christopher Leyton Ltd | Extraterritorial | 2024 |
| Tony Mellors Survey Limited | Professional & scientific | 2015 |
| Toothland Co Ltd | Other services | 2025 |
| Top 2 Bottom Inventories Ltd | Administrative & support | 2019 |
| Toro Plumbing and Heating Ltd | Construction | 2022 |
| Touchstone Investments Limited | Construction | 1991 |
| Tower Property Solutions Ltd | Construction | 2025 |
| TPX Properties Ltd | Real estate | 2026 |
| Tractable Solutions Ltd | Professional & scientific | 2025 |
| Trade Flow Customs Consultancy Limited | Professional & scientific | 2014 |
| Trade Only Plumbing Supplies Ltd | Wholesale & retail | 2024 |
| Tradition Property Services Ltd | Administrative & support | 2005 |
| Traditional Furniture Frames Limited | Manufacturing | 2004 |
| Transmission Samples Ltd | Wholesale & retail | 2012 |
| Trend Finance Limited | Professional & scientific | 2020 |
| Tri-Fab Employee Trustee Limited | Extraterritorial | 2020 |
| Tri-Fab Limited | Manufacturing | 2008 |
| Tripp+Tripp Limited | Hospitality | 2015 |
| Trotters 40-42 Arundel Road Ltd | Real estate | 2018 |
| True Bride Limited | Wholesale & retail | 2005 |
| True Bride Management Services Ltd | Real estate | 2019 |
| Truevisuals Ltd | Extraterritorial | 2004 |
| TS Building and Maintenance Services Ltd | Construction | 2022 |
| TS36 Clothing Ltd | Wholesale & retail | 2025 |
| Tsmr Limited | Wholesale & retail | 2013 |
| TT Dual Control Car Rentals Ltd | Administrative & support | 2025 |
| TTP Business Services Limited | Professional & scientific | 2008 |
| Turbo Toms Limited | Wholesale & retail | 2012 |
| Twentyfourdesign Limited | Professional & scientific | 2009 |
| U a Y Holdings Ltd | Real estate | 2024 |
| UBS Import Export Ltd | Wholesale & retail | 2023 |
| Ugsm Limited | Manufacturing | 2013 |
| UK Enviro Services Limited | Water & waste | 2022 |
| UK Health Direct Ltd | Manufacturing | 2014 |
| Ullswater 1966 Limited | Extraterritorial | 2015 |
| Umonkey Limited | Extraterritorial | 2009 |
| Unearthco Ltd | Information & communication | 2026 |
| Union Jewellery Ltd | Wholesale & retail | 2010 |
| Unity Insurance Services Ltd | Financial services | 2007 |
| Unlimited Transport Ltd | Transport & logistics | 2025 |
| Valorous Ltd | Professional & scientific | 2024 |
| Varpek Ltd | Wholesale & retail | 2020 |
| Vatnav Ltd | Professional & scientific | 2019 |
| Vavel Services Limited | Administrative & support | 2003 |
| Velicka Property Group Ltd | Real estate | 2021 |
| Velocity Studios Performance Limited | Transport & logistics | 2025 |
| Vendable Ltd | Financial services | 2014 |
| Venour Sussex Limited | Administrative & support | 2020 |
| Ventura Accounting Services Limited | Professional & scientific | 2022 |
| Vernon House Developments Limited | Real estate | 2006 |
| Vertro Ltd | Manufacturing | 2019 |
| Vicky Woodgate Ltd | Arts & recreation | 2022 |
| Victorian Vibe Ltd | Other services | 2021 |
| View Advise Limited | Professional & scientific | 2019 |
| Vildora Limited | Real estate | 2021 |
| Vivid Construction Limited | Construction | 2013 |
| VM Electrical Solutions Ltd | Professional & scientific | 2025 |
| Voice Venture Ltd | Wholesale & retail | 2023 |
| Void Homes Ltd | Construction | 2025 |
| Voilaa Ltd | Extraterritorial | 2024 |
| Voyages Marirose Ltd | Administrative & support | 1996 |
| Vyas Capital Holdings Ltd | Financial services | 2025 |
| Vyas Real Estate Ltd | Real estate | 2022 |
| Wardtek Electronics Ltd | Information & communication | 2011 |
| Wash N DRY Ltd | Other services | 2021 |
| Wave Maritime Consultancy Ltd | Professional & scientific | 2022 |
| Way of the Viking Ltd | Arts & recreation | 2024 |
| WDA Consultants Ltd | Professional & scientific | 2017 |
| Weddings by Sorella Limited | Other services | 2020 |
| Wescott Investment Group Ltd | Extraterritorial | 2021 |
| West Beach Developments Limited | Construction | 2020 |
| West Sussex Construction Ltd | Construction | 2020 |
| West Sussex DRY Lining Limited | Construction | 2021 |
| Westbury Filtermation Limited | Manufacturing | 2009 |
| West’N Motors Ltd | Administrative & support | 2026 |
| Whare Consulting Limited | Professional & scientific | 2016 |