| Togan Limited | Health & social care | 2017 |
| Togan Properties Limited | Real estate | 2018 |
| TOM Garrod Consulting Limited | Professional & scientific | 2024 |
| Tombstone Brewery Limited | Manufacturing | 2014 |
| Toonwear Ltd | Wholesale & retail | 2023 |
| Top 2 Bottom Commercial Cleaning Ltd | Administrative & support | 2021 |
| Top 2 Bottom Facility Management Ltd | Administrative & support | 2021 |
| Top Banana Communities Ltd | Health & social care | 2022 |
| Top Button Ltd | Hospitality | 2017 |
| Top Coat Painters & Decorators Ltd | Construction | 2025 |
| Top Sinks Limited | Extraterritorial | 2005 |
| Top Tier Collectables Ltd | Wholesale & retail | 2025 |
| Topicks Holdings Limited | Real estate | 2019 |
| Topline Trucks Limited | Wholesale & retail | 2013 |
| Toptech Construction Services Ltd | Construction | 2024 |
| Tortrading Ltd | Extraterritorial | 2024 |
| Tosar Pharma Limited | Financial services | 2024 |
| Total Reclaim Systems Limited | Other services | 1998 |
| Toucan Engineers Limited | Mining & quarrying | 1995 |
| Toucan Toys Ltd | Wholesale & retail | 2025 |
| TOW IT to YOU Limited | Transport & logistics | 2025 |
| Tower Caravan Park Limited | Hospitality | 2016 |
| Town Centre Partnership Co.(Great Yarmouth) Ltd | Administrative & support | 2000 |
| Townlands Freehold Ltd | Real estate | 2025 |
| TP Roofing Services Ltd | Construction | 2023 |
| TPR Events Limited | Construction | 2021 |
| TR Flooring Ltd | Construction | 2026 |
| TR Rentals Limited | Administrative & support | 2013 |
| Trad Technologies Limited | Manufacturing | 2026 |
| Trade Hub U.K Ltd | Administrative & support | 2020 |
| Trakcorp Ltd | Information & communication | 2026 |
| Transforme Associates Limited | Information & communication | 2003 |
| Transmit Containers Holdings Limited | Financial services | 2020 |
| Transmit Containers Limited | Manufacturing | 1984 |
| Transport Costica Oane Ltd | Administrative & support | 2026 |
| Trasport Trans Ltd | Transport & logistics | 2025 |
| Traymaster Land Limited | Agriculture & fishing | 2008 |
| Traymaster Limited | Manufacturing | 1969 |
| Treat US Market Gate Shoping Center Limited | Hospitality | 2026 |
| Trehayne Ltd | Construction | 2025 |
| Trent Communications Limited | Arts & recreation | 2018 |
| Tri-Ember Limited | Construction | 2012 |
| Trian 2022 Ltd | Real estate | 2022 |
| Triangle Tech Services Ltd | Construction | 2024 |
| Trimax Coating Limited | Financial services | 2016 |
| Trinity Flavours Ltd | Hospitality | 2025 |
| Trinity Waters Ltd | Hospitality | 2011 |
| Trinsum Distribution Networks Ltd | Information & communication | 2025 |
| Trionex Engineering Ltd | Professional & scientific | 2026 |
| Trip Heist Limited | Administrative & support | 2026 |
| True Centre Ltd | Real estate | 2012 |
| True Products Group Ltd | Manufacturing | 2016 |
| True Traders Ltd | Wholesale & retail | 2007 |
| TSO Builders Ltd | Construction | 2024 |
| Tubbys Catering Ltd | Hospitality | 2025 |
| Tucker Design Services Ltd | Professional & scientific | 2005 |
| Tuddenham Caravan Park Ltd | Hospitality | 2014 |
| Tudor Lodge (Gorleston) Limited | Households | 1999 |
| Tunberry Golf Management Limited | Arts & recreation | 2024 |
| Turkish Salon Ltd | Other services | 2019 |
| TW Holdings NFK Limited | Administrative & support | 2023 |
| TWF Roller Garage Doors Ltd | Manufacturing | 2018 |
| Tyche Services Ltd | Real estate | 2020 |
| Tyla Ltd | Construction | 2018 |
| U-2-ME Ltd | Real estate | 2025 |
| Uchejay Limited | Health & social care | 2019 |
| Udan Limited | Wholesale & retail | 2022 |
| Udayan Limited | Real estate | 2022 |
| Udcj Homes Ltd | Real estate | 2019 |
| UK Boiler Maintenance Ltd | Construction | 2025 |
| Ultimeteor Ltd | Manufacturing | 1967 |
| Under Open Sky Ltd | Professional & scientific | 2021 |
| Undercover Yeti Limited | Wholesale & retail | 2020 |
| Underhill & Crowe Limited | Administrative & support | 2003 |
| Unicorn Tears Ltd | Professional & scientific | 2022 |
| Unique Venetian Limited | Construction | 2015 |
| United Cash & Carry Limited | Wholesale & retail | 2019 |
| Unity Building Consultancy Ltd | Professional & scientific | 2025 |
| Unity Well Integrity Europe Limited | Professional & scientific | 1994 |
| Upgrade Build Solutions Limited | Construction | 2013 |
| Upon the Level Limited | Wholesale & retail | 2020 |
| Upvc Colour Change UK Limited | Households | 2018 |
| Urban Groundcare Limited | Administrative & support | 2024 |
| Urban Umbrella Corp Ltd | Transport & logistics | 2022 |
| Urologica Ltd | Transport & logistics | 2025 |
| USA Fried Chicken Pizza Ltd | Other services | 2018 |
| USA Kebab House Ltd | Hospitality | 2026 |
| Utopian Contracts Limited | Professional & scientific | 2017 |
| Utterbooks Limited | Information & communication | 2017 |
| V P Drilling Limited | Mining & quarrying | 2024 |
| V R Real State Ltd | Real estate | 2026 |
| V&L Garage Ltd | Wholesale & retail | 2016 |
| V.C. Vintners Limited | Wholesale & retail | 2000 |
| VA Builders Ltd | Construction | 2021 |
| Value Capture Limited | Information & communication | 2016 |
| Value Care Services Limited | Health & social care | 2022 |
| Value Flooring Ltd | Mining & quarrying | 2019 |
| Vanguard Recruitment Limited | Administrative & support | 1994 |
| Vani Rentals Ltd | Real estate | 2024 |
| Vape Iland Ltd | Wholesale & retail | 2024 |