| THE Rutland Valleys Shooting Club Ltd | Arts & recreation | 2025 |
| THE Satchville Gift Company Limited | Wholesale & retail | 2011 |
| THE Scruffies Ltd | Wholesale & retail | 2020 |
| THE Sewing Fairy Ltd | Arts & recreation | 2019 |
| THE Shopoholic Foodies Limited | Administrative & support | 2026 |
| THE Space Between Limited | Administrative & support | 2022 |
| THE Stace Group Limited | Financial services | 2021 |
| THE Stamford BED Company Ltd | Wholesale & retail | 2025 |
| THE Talking Company Limited | Administrative & support | 2015 |
| THE Vale Workshop Ltd | Manufacturing | 2018 |
| THE Veterinary Osteoarthritis Alliance Ltd | Professional & scientific | 2019 |
| THE VIP Beauty Suite Ltd | Wholesale & retail | 2025 |
| THE Wheatsheaf Leisure (Edith Weston) Limited | Hospitality | 2005 |
| THE Wood Boutique (Wymondham) Limited | Wholesale & retail | 2020 |
| THE Woodford Collective Ltd | Hospitality | 2024 |
| THE Woodland Dining Club Limited | Hospitality | 2025 |
| Themaq International Limited | Wholesale & retail | 2019 |
| Therapy Begins Here Ltd | Health & social care | 2024 |
| There & Back Light Railway Company Limited | Arts & recreation | 2019 |
| Thomas COX Estates Limited | Real estate | 2017 |
| Thomas Maughan Limited | Administrative & support | 2021 |
| Thomas Nicholas Ltd | Financial services | 2008 |
| Thomson Cooper Ltd | Administrative & support | 2009 |
| Thornton (EM) Ltd | Agriculture & fishing | 2005 |
| Thorpe Curtains Limited | Manufacturing | 2002 |
| Thorpe NO. 1 Limited | Hospitality | 2025 |
| Thorpe Satchville Management Limited | Households | 1977 |
| Thrive Health and Wellbeing PT Ltd | Arts & recreation | 2026 |
| THYME1 Ltd | Hospitality | 2018 |
| Tibbs Fire & Security Limited | Administrative & support | 2023 |
| Ticq Ltd | Professional & scientific | 2025 |
| TIM Challoner Ltd. | Other services | 2012 |
| Times UP Productions Ltd | Arts & recreation | 2025 |
| Timewise Innovations Ltd | Arts & recreation | 2024 |
| Timpani Preconstruction Services Limited | Professional & scientific | 2024 |
| TIN 80 Ltd | Professional & scientific | 2016 |
| Titan Freight Forwarding Ltd | Transport & logistics | 2025 |
| Tjfs Services (UK) Ltd | Agriculture & fishing | 2025 |
| TK Kingston Ltd | Agriculture & fishing | 2020 |
| Toga Restaurant Ltd | Hospitality | 2019 |
| Tomasz Wyrostkiewicz Ltd | Transport & logistics | 2015 |
| Tomlin Investments Ltd | Real estate | 2025 |
| Tony Brown Building Contractors Limited | Construction | 2019 |
| Tony Thompson Racing Limited | Wholesale & retail | 2003 |
| Top END Lettings Ltd | Real estate | 2019 |
| Top Stock Properties Ltd | Households | 2024 |
| Top Tier Civils and Construction Ltd | Construction | 2021 |
| Towers & Keightley Limited | Manufacturing | 1978 |
| TR Travel Limited | Administrative & support | 2018 |
| Trade Logistix Ltd | Construction | 2026 |
| Trade Smart Solutions Ltd | Construction | 2024 |
| Trade Vehicle Parts Limited | Wholesale & retail | 2015 |
| Tradesman Task Limited | Information & communication | 2017 |
| Train to AID (East Midlands) Limited | Education | 2021 |
| Trent END Capital Ltd | Administrative & support | 2014 |
| Trevor Carter Limited | Construction | 2004 |
| Tribe Housing Ltd | Real estate | 2019 |
| Triple E Fabrications Ltd | Construction | 2023 |
| Trjb Limited | Information & communication | 2020 |
| True Fair Eco Tourism CIC | Education | 2012 |
| True Fair Trading CIC | Wholesale & retail | 2012 |
| True North Operations Ltd | Information & communication | 2026 |
| Trueform Buildings Limited | Construction | 2008 |
| Truframe Aluminium Limited | Manufacturing | 2019 |
| Truframe Composite Doors Limited | Construction | 2023 |
| Truframe Glass Solutions Ltd | Manufacturing | 2009 |
| Truframe Holdings Limited | Real estate | 2017 |
| Truframe Limited | Construction | 2016 |
| Truframe Trade Centres Limited | Construction | 2013 |
| Truframe Trade Frames Limited | Construction | 2009 |
| Truman Contractors (Holdings) Limited | Financial services | 2026 |
| Trying Media Limited | Information & communication | 2024 |
| TTF Commercial Services Limited | Wholesale & retail | 2016 |
| Turbayne Composites Ltd | Professional & scientific | 2025 |
| Tutor Hall Mids Ltd | Water & waste | 2012 |
| TVE Limited | Administrative & support | 2021 |
| Twigs and Twine Ltd | Arts & recreation | 2018 |
| UAV Investments Limited | Financial services | 2020 |
| Ubiquitous Group Ltd | Financial services | 2026 |
| UK Deal S & P Limited | Real estate | 2025 |
| UK Design Store Ltd | Information & communication | 2015 |
| UK Printwear Ltd | Wholesale & retail | 2011 |
| UK Property Services Limited | Real estate | 2007 |
| Ultimate Loft Insulation Ltd | Construction | 2026 |
| Ultrabold Ltd | Professional & scientific | 2022 |
| Unicorn PPC Ltd | Professional & scientific | 2015 |
| United Kingdom Stage Services Limited | Arts & recreation | 2017 |
| United M & E Limited | Administrative & support | 2016 |
| United M & E Solutions Limited | Administrative & support | 2015 |
| UNO Milano's Ltd | Hospitality | 2020 |
| UP an' at 'EM! History Limited | Education | 2022 |
| Upsurge Studio Ltd | Professional & scientific | 2023 |
| Uptime Solutions Investments Ltd | Real estate | 2025 |
| Uptime Solutions(Eng) Ltd | Professional & scientific | 2025 |
| Used Bargainz Limited | Wholesale & retail | 2025 |
| Utopia Financial Services Ltd | Financial services | 2016 |
| Vadx Limited | Wholesale & retail | 2026 |
| Vale Brickwork Ltd | Construction | 2022 |
| Vale Contracting Services Ltd | Construction | 2016 |
| Vale Cycles Ltd | Wholesale & retail | 2021 |