| Thomas Ireland Limited | Manufacturing | 2016 |
| Thorchurch Properties Limited | Real estate | 2019 |
| Three Counties Water Ltd | Professional & scientific | 2010 |
| Three Towns Youth FC Ltd | Arts & recreation | 2026 |
| Thrill Rides Limited | Arts & recreation | 2013 |
| Thunderchild Creative Technologies Limited | Information & communication | 2026 |
| Tibbenham-Brown (East) Ltd | Other services | 2019 |
| Tim's Mobile Tyre Services Ltd | Wholesale & retail | 2025 |
| Timewarp Racing Ltd | Arts & recreation | 2018 |
| Titan's Lair Gym Ltd | Arts & recreation | 2022 |
| TJ International Ltd Ltd | Hospitality | 2025 |
| TLD Sachets Limited | Manufacturing | 2007 |
| Tmcore Ltd | Real estate | 2024 |
| TMO Solutions Limited | Professional & scientific | 2014 |
| TN Premier Catering Ltd | Hospitality | 2026 |
| Toad Hall Interiors Ltd | Wholesale & retail | 2014 |
| Todarise Systems Ltd | Information & communication | 2025 |
| Tommy Hubert Ltd | Extraterritorial | 2024 |
| Tonictalk Limited | Health & social care | 2013 |
| Top CUT Barber I Ltd | Other services | 2024 |
| Top One Deals Ltd | Wholesale & retail | 2018 |
| Topple Academy Limited | Arts & recreation | 2024 |
| Torque JP Limited | Transport & logistics | 2016 |
| Tose-Vision Healthcare Ltd | Health & social care | 2023 |
| Total Projects and Construction Ltd | Construction | 2026 |
| Totalq Ltd | Professional & scientific | 2024 |
| Toth Engineering Ltd | Construction | 2024 |
| Tots & Juniors Limited | Other services | 2009 |
| Townsend Nursery and Garden Equipment Centre Limited | Wholesale & retail | 1986 |
| Townsends (Garages) Limited | Extraterritorial | 1948 |
| Trade Winds (Leics) Limited | Professional & scientific | 2003 |
| Trades 4 YOU Building Contractors Ltd | Construction | 2026 |
| Trading Base Limited | Transport & logistics | 2001 |
| Tranquil Earth Ltd | Wholesale & retail | 2007 |
| Trantor Solutions Ltd | Professional & scientific | 2014 |
| Tresacare Limited | Education | 2020 |
| Trident Oncology Limited | Real estate | 2011 |
| TRS & Sons Limited | Construction | 2016 |
| Truong Property Ltd | Real estate | 2024 |
| Trust Point Safety Ltd | Professional & scientific | 2025 |
| TS Property & Management Limited | Construction | 2024 |
| Tshai International Limited | Professional & scientific | 2015 |
| Tshakmo Logistics (PVT) Limited | Transport & logistics | 2024 |
| TT Property and Garden Ltd | Construction | 2025 |
| TT3 Limited | Hospitality | 2016 |
| Turbo Speed Limited | Wholesale & retail | 2024 |
| Tzulogistics Ltd | Transport & logistics | 2019 |
| U Dream WE Build Ltd | Construction | 2017 |
| UK Accent Pro Ltd | Construction | 2020 |
| UK Entryevents Limited | Wholesale & retail | 2026 |
| UK GDP Association C.I.C. | Professional & scientific | 2021 |
| UK Gym Service Ltd | Manufacturing | 2024 |
| UK Inspection Systems Limited | Manufacturing | 2009 |
| UK Inspection Systems Trustees Limited | Professional & scientific | 2023 |
| UK STA Consultants Ltd | Professional & scientific | 2023 |
| Ukbeenetwork Ltd | Administrative & support | 2026 |
| Ukcg & Partners LLP | | 2019 |
| Ultraphonic Worldwide 2K Ltd. | Manufacturing | 2023 |
| Unit 25 CIC | Education | 2025 |
| Unite Barber Co Ltd | Other services | 2022 |
| Unite Global Holdings Limited | Financial services | 2024 |
| Unite Premier Properties Limited | Real estate | 2024 |
| Unite to Change Healthcare Limited | Health & social care | 2019 |
| Unmanaged Ltd | Information & communication | 2020 |
| URV Collections Limited | Wholesale & retail | 2025 |
| Usmb Limited | Health & social care | 2022 |
| Utilities Limited | Professional & scientific | 1996 |
| Utilities Securities Limited | Professional & scientific | 2002 |
| V R Vapes Ltd | Wholesale & retail | 2015 |
| Valvecs Ltd | Manufacturing | 2012 |
| Vanada Ltd | Transport & logistics | 2026 |
| Vanilla Spice Cake Studio Ltd | Manufacturing | 2019 |
| Variant Trading Limited | Education | 2021 |
| Varma Properties Ltd | Real estate | 2022 |
| Vatax Accountancy Services Ltd | Professional & scientific | 2016 |
| Vehparts Ltd | Manufacturing | 2022 |
| Venezia Restaurants Ltd | Hospitality | 2015 |
| VENOM91 Limited | Transport & logistics | 2019 |
| Verdant and Bright Garden and Home Ltd | Construction | 2019 |
| Verge Limited | Information & communication | 2009 |
| Verification 4 Systems Ltd. | Information & communication | 2009 |
| Vert-Ego Ltd | Wholesale & retail | 2010 |
| Vertu Security Limited | Administrative & support | 2018 |
| Vestal Vodka Limited | Wholesale & retail | 2010 |
| VFM Consulting Ltd | Wholesale & retail | 2024 |
| Vintique Limited | Real estate | 2016 |
| VIP Cars Repair Ltd | Wholesale & retail | 2017 |
| Vision Aerospace Limited | Manufacturing | 1998 |
| Vision for Destiny Limited | Administrative & support | 2011 |
| Visionics Ltd | Financial services | 2009 |
| Vistula Accountancy Services Ltd | Professional & scientific | 2021 |
| Vistula Financial Solutions Ltd | Other services | 2021 |
| Vita Rail Limited | Construction | 2015 |
| VK Logistics Ltd | Transport & logistics | 2013 |
| Vlad Crasneanu Ltd | Construction | 2018 |
| Vladcom Systems Limited | Administrative & support | 2010 |
| Vliani Ltd | Professional & scientific | 2023 |
| VNA 70 Ltd | Administrative & support | 2012 |
| Vstv Group Ltd | Wholesale & retail | 2026 |
| W & M Services (Northants) Ltd | Financial services | 2017 |