| Tiger Inspection Services Limited | Professional & scientific | 2007 |
| Tigers Estates Ltd | Real estate | 2026 |
| Tigger Management Ltd | Real estate | 2018 |
| Tillett Properties Limited | Real estate | 2009 |
| Tillett Property Ltd | Construction | 2026 |
| Tills Properties Ltd | Real estate | 2024 |
| Timothy Spearing Antique Silver Limited | Wholesale & retail | 2017 |
| Timothy Waddell Wealth Management Limited | Financial services | 2011 |
| Timperley Holdings Limited | Health & social care | 2013 |
| TIN Planet Limited | Professional & scientific | 2014 |
| TJ & MA Ltd | Wholesale & retail | 2016 |
| TJ Daly Exhibition Services Ltd | Construction | 2015 |
| TJ3 Engineering Ltd | Professional & scientific | 2025 |
| TJR Property Solutions Ltd | Real estate | 2025 |
| Tkgreencare Ltd | Administrative & support | 2026 |
| TL O&G Services Ltd | Mining & quarrying | 2025 |
| TLC the True Living Company Ltd | Wholesale & retail | 2026 |
| TMA Builders Limited | Construction | 2003 |
| Tmels Limited | Construction | 2016 |
| Toby Yeaman Electrical Limited | Construction | 2021 |
| Toge Limited | Administrative & support | 2020 |
| TOM Edwards Quantity Surveying Limited | Professional & scientific | 2025 |
| Tom's Auto Service Ltd | Wholesale & retail | 2024 |
| Toma Trasnport Ltd | Transport & logistics | 2026 |
| Tommi JOE Limited Limited | Professional & scientific | 2024 |
| Tommoco Limited | Other services | 2014 |
| Tony Bailey Consulting Limited | Wholesale & retail | 2024 |
| Tony Hudson Transport Limited | Transport & logistics | 2002 |
| Tony Jones Media Limited | Information & communication | 2014 |
| Top of PIN UK Ltd | Construction | 2025 |
| Top Style Barber Lowestoft Ltd | Other services | 2022 |
| Top-Notch Holdings Ltd | Wholesale & retail | 2023 |
| Topspec Roofing Ltd | Construction | 2019 |
| Topstitch Solutions Ltd | Manufacturing | 2021 |
| Torcurry Ltd | Hospitality | 2020 |
| Torque Tech Training Services Limited | Professional & scientific | 2017 |
| Torra Food & Drink Limited | Hospitality | 2016 |
| Total Balance Wellbeing Centre Limited | Health & social care | 2006 |
| Total Build (East Anglia) Limited | Construction | 2005 |
| Total Container Solutions Limited | Construction | 2012 |
| Total E-Cig Limited | Wholesale & retail | 2014 |
| Total Homes (East Anglia) Ltd | Extraterritorial | 2022 |
| Total Offshore Solutions Ltd | Professional & scientific | 2026 |
| Town & Country Property Developers Limited | Real estate | 2003 |
| Town and Provincial Seminars Limited | Other services | 1994 |
| Townsend Home Improvements Ltd | Construction | 2021 |
| TP Precision Works Ltd | Construction | 2026 |
| Tractor Barn Productions Limited | Information & communication | 2010 |
| Tracy Cole Properties Limited | Real estate | 2019 |
| Tramway Properties Limited | Construction | 2020 |
| Transformational Training Ltd | Education | 2025 |
| Transworld Holiday Consultancy Ltd | Administrative & support | 2004 |
| Transworld Holidays Limited | Other services | 2023 |
| Treadz Limited | Wholesale & retail | 2017 |
| Tredwell Consulting Limited | Administrative & support | 1981 |
| Tredwell Developments Limited | Construction | 2003 |
| Tri-Tech Contracting Limited | Construction | 2023 |
| Triac Services Limited | Manufacturing | 1993 |
| Trident Marine Holdings Limited | Real estate | 2026 |
| Trifin Plus Limited | Real estate | 2022 |
| Trinity Norfolk Limited | Financial services | 2016 |
| Triple B Petroleum Ltd | Professional & scientific | 2021 |
| Triside Properties Ltd | Construction | 2021 |
| Triumph Access Services (EA) Limited | Other services | 2014 |
| TRU Form Peptides Ltd | Wholesale & retail | 2026 |
| Trubale 2026 Ltd | Hospitality | 2026 |
| Trucore Group Limited | Administrative & support | 2026 |
| True Blue Surveys Limited | Information & communication | 2005 |
| Truform Labs Ltd | Wholesale & retail | 2026 |
| Trunest Cleaning Limited | Administrative & support | 2026 |
| TSH UK Services Ltd | Construction | 2024 |
| TSS Diamond Drilling & Cutting Limited | Construction | 2021 |
| Turbazzi Ltd | Hospitality | 2025 |
| Turnbuckle Communications Limited | Wholesale & retail | 2018 |
| Turnbuckle Lifestyle Ltd | Professional & scientific | 2025 |
| Turnbuckle Services Ltd | Administrative & support | 2022 |
| Turnbuckle Treasures Ltd | Wholesale & retail | 2026 |
| Turnstone and Sandpiper Limited | Hospitality | 2022 |
| Turrell Electrical Services Limited | Construction | 2011 |
| Tutanlar Ltd | Hospitality | 2025 |
| Twenty Five Ltd | Arts & recreation | 2024 |
| Twenty Four Seven Fitness Ltd | Arts & recreation | 2007 |
| Twinkles Cleaning Service Ltd | Administrative & support | 2022 |
| Two Smoking Barrels Country Pursuits Ltd | Wholesale & retail | 2020 |
| TX Transform Ltd | Professional & scientific | 2008 |
| Ugur Kebab & Fish Ltd | Hospitality | 2014 |
| UK Engineering Recruitment Ltd | Administrative & support | 2000 |
| UK Engravers Limited | Extraterritorial | 2008 |
| UK Graphics & Engraving Limited | Manufacturing | 2005 |
| UK Homefinder Limited | Real estate | 2015 |
| UK Medical Aesthetics and Cosmetics Limited | Health & social care | 2022 |
| UK Power Direct Ltd | Administrative & support | 2013 |
| Ultimate Building Services (EA) Limited | Construction | 2018 |
| Ultimate Tool Competitions Limited | Wholesale & retail | 2024 |
| Undermycloud Ltd | Wholesale & retail | 2025 |
| UNIT69 Barbershop Ltd | Other services | 2026 |
| United Rail Engineering Ltd | Construction | 2023 |
| Unity Property Investments Limited | Real estate | 2017 |
| Upstream Completions Limited | Professional & scientific | 2022 |
| Upvc Doctor EA Ltd | Construction | 2015 |