| Tmqss Ltd | Administrative & support | 2024 |
| TMS Financial Consulting Ltd | Information & communication | 2013 |
| Tmullarkey Ltd | Wholesale & retail | 2024 |
| TN Engineering Ltd | Administrative & support | 2008 |
| Tngau Ltd | Wholesale & retail | 2026 |
| TNR HR Limited | Other services | 2018 |
| TO the North Ltd | Wholesale & retail | 2023 |
| To-Pie-For Ltd | Manufacturing | 2019 |
| Toast Catering Limited | Hospitality | 2025 |
| Tobiah Land Ltd | Real estate | 2024 |
| Tobsam Ltd | Health & social care | 2024 |
| Toby Meze Limited | Hospitality | 2024 |
| Toch Consulting Limited | Professional & scientific | 2025 |
| Tochukwu Tech and AI Academy Limited | Information & communication | 2026 |
| Today Food Warrington Ltd | Hospitality | 2024 |
| Today Team Limited | Transport & logistics | 2005 |
| Todays Conservatory Limited | Construction | 2010 |
| Toddle About South Warwickshire Ltd | Information & communication | 2025 |
| Toebern Ltd | Professional & scientific | 2022 |
| TOI Entertainment Ltd | Information & communication | 2023 |
| Tokada Group Ltd | Wholesale & retail | 2018 |
| Tolbest Limited | Manufacturing | 1989 |
| Tolley Studios Ltd | Information & communication | 2025 |
| TOM Bean Services Ltd | Administrative & support | 2022 |
| TOM Brown Property Limited | Real estate | 2020 |
| TOM Deards Auto Services Limited | Wholesale & retail | 2025 |
| TOM Doyle Engineering Limited | Professional & scientific | 2019 |
| TOM Grainger School of Motoring Limited | Education | 2002 |
| TOM Hughes Designs Ltd | Administrative & support | 2012 |
| TOM Rodgers Productions Limited | Arts & recreation | 2013 |
| TOM Rodgers Property Limited | Real estate | 2025 |
| TOM Wilson Construction Services Ltd | Administrative & support | 2023 |
| Toma Engineering Services Limited | Administrative & support | 2015 |
| Tomasz - Lukomski Ltd | Transport & logistics | 2023 |
| Tomasz Musial Limited | Transport & logistics | 2014 |
| Tomfield Contracting Limited | Construction | 2016 |
| Tomjeffriessurvey Limited | Professional & scientific | 2017 |
| Tomlins Bakery Ltd | Manufacturing | 2022 |
| Tomroad Transport Ltd | Transport & logistics | 2019 |
| Toms Possessions Limited | Administrative & support | 2016 |
| Tonge Limited | Construction | 2011 |
| Tonsoe Ltd | Information & communication | 2022 |
| Tonusolutions Ltd | Construction | 2025 |
| Tony Baines Ltd | Professional & scientific | 2019 |
| Tony Lewis Limited | Professional & scientific | 2018 |
| Tony O`Neill Limited | Information & communication | 2007 |
| Tony Transport Ltd | Transport & logistics | 2022 |
| Tony Webb Services Ltd | Administrative & support | 2026 |
| TOO Busy Ltd | Construction | 2023 |
| Tooba Shehnoor Limited | Wholesale & retail | 2026 |
| Tool KIT Engineering Limited | Professional & scientific | 2016 |
| Tool Marketing Company Limited | Wholesale & retail | 2011 |
| Top Brand Worldwide Limited | Administrative & support | 2023 |
| Top Bricy Group Ltd | Wholesale & retail | 2019 |
| Top CUT Tree & Garden Services Ltd | Administrative & support | 2025 |
| Top Engineering Limited | Professional & scientific | 2021 |
| Top Fighter GB Limited | Education | 2019 |
| Top Good Food Ltd | Hospitality | 2025 |
| Top Trans Ltd | Manufacturing | 2020 |
| Topco 1383 Limited | Information & communication | 2019 |
| Topcoat Cosmetic Car Repairs Limited | Wholesale & retail | 2004 |
| Topmarksolutionsuk Limited | Construction | 2016 |
| Topshelf Brands Ltd | Wholesale & retail | 2024 |
| Topshine Valeting Ltd | Administrative & support | 2023 |
| Torbridge Ltd | Administrative & support | 2025 |
| Torch Capital Ltd | Professional & scientific | 2025 |
| Torettomotors Ltd | Wholesale & retail | 2019 |
| Torino 2006 Ltd | Real estate | 2024 |
| Torrin Technology Limited | Professional & scientific | 2019 |
| Tosche Limited | Professional & scientific | 2020 |
| Tostma Cyber Security Limited | Information & communication | 2017 |
| Total Admin Solutions Limited | Administrative & support | 2022 |
| Total Building Maintenance Limited | Construction | 2002 |
| Total Change Management Partners Ltd | Information & communication | 2019 |
| Total Cladding (UK) Ltd | Construction | 2013 |
| Total Control Systems Limited | Manufacturing | 2020 |
| Total Home Care Solutions Limited | Health & social care | 1999 |
| Total Interiors North West Limited | Construction | 2014 |
| Total Living Solutions Limited | Real estate | 2022 |
| Total Manufacturing Support Limited | Professional & scientific | 2008 |
| Total Ninety Ltd | Wholesale & retail | 2022 |
| Total Piping Solutions Limited | Professional & scientific | 2010 |
| Total Plumb Ltd | Wholesale & retail | 2024 |
| Total Project Management Services Ltd | Professional & scientific | 2026 |
| Total Roofing & Cladding (NW) Ltd | Construction | 2004 |
| Total S&F Group Holdings Limited | Financial services | 2020 |
| Total Steelwork & Fabrication Ltd | Manufacturing | 2001 |
| Totality Bookkeeping Ltd | Professional & scientific | 2023 |
| Totally Chuffed Two Limited | Administrative & support | 2025 |
| Totally Random Limited | Wholesale & retail | 2025 |
| Totally Reckless Limited | Arts & recreation | 2024 |
| Tote (Successor Company) Limited | Arts & recreation | 2011 |
| Tote Bookmakers Limited | Real estate | 1965 |
| Tote Computer Services Limited | Arts & recreation | 1964 |
| Tote Course Limited | Arts & recreation | 1960 |
| Tote Credit Limited | Arts & recreation | 1956 |
| Tote Digital Limited | Arts & recreation | 2011 |
| Tote Europools Limited | Arts & recreation | 1991 |
| Tote Investors Limited | Arts & recreation | 1930 |
| Tote Limited | Arts & recreation | 2001 |