| TJC ERP Consulting Services Ltd | Professional & scientific | 2026 |
| Tjiraso Services Ltd | Health & social care | 2022 |
| Tjjh Limited | Agriculture & fishing | 2018 |
| Tjjhi Limited | Agriculture & fishing | 2018 |
| TJS Hospitality Limited | Hospitality | 2022 |
| TJS Tree and Gardening Services Ltd | Administrative & support | 2026 |
| TJW Heating & GAS Ltd | Construction | 2022 |
| TK Cabs Ltd | Transport & logistics | 2025 |
| TK Yoga Limited | Other services | 2016 |
| TLC Domestic Cleaning Ltd | Construction | 2018 |
| TLC Roofing Solutions Ltd | Construction | 2023 |
| TLM Ecommerce Ltd | Wholesale & retail | 2023 |
| TLR Estates Ltd | Real estate | 2023 |
| Tlsbcamhs Services Ltd | Health & social care | 2024 |
| TM Box Limited | Extraterritorial | 2025 |
| TM R US Ltd | Public administration | 2016 |
| TM Services Audio Visual Limited | Professional & scientific | 2011 |
| Tm.Ink Ltd | Wholesale & retail | 2025 |
| Tmac Wireless Solutions Ltd | Information & communication | 2001 |
| TMC Carpentry Ltd | Construction | 2015 |
| TMC Studios Ltd | Real estate | 2019 |
| Tmct Ltd | Manufacturing | 2026 |
| TME Motorsport Engineering Limited | Manufacturing | 2016 |
| TMH Group Ltd | Information & communication | 2018 |
| TMH Training Ltd | Administrative & support | 2020 |
| Tminal Ltd | Information & communication | 2020 |
| TMJ Interiors Group Limited | Financial services | 2024 |
| TMJ Logistics Limited | Extraterritorial | 2021 |
| TML Services Limited | Construction | 2023 |
| TMM Solution Ltd | Transport & logistics | 2025 |
| TMS Property Group Limited | Real estate | 2025 |
| TMS Residential Group Ltd | Real estate | 2026 |
| TMV Affiliate Ltd | Information & communication | 2022 |
| TN Utilities Ltd | Construction | 2022 |
| TNT Marketing & Events Ltd | Professional & scientific | 2025 |
| TO the Moon and Back Care Company Ltd | Health & social care | 2025 |
| Tobacco Alternative Ltd | Professional & scientific | 2000 |
| Tobiecwindowcleaning Limited | Administrative & support | 2024 |
| Tobin Plant Ltd | Administrative & support | 2022 |
| Toccoarte Ltd | Wholesale & retail | 2026 |
| Todd's Group Limited | Wholesale & retail | 2021 |
| Toddy Tool Hire Ltd | Administrative & support | 2020 |
| Todetail Ltd | Construction | 2026 |
| Todo Office Cleaning Ltd | Administrative & support | 2016 |
| Toflea Transport Ltd | Transport & logistics | 2024 |
| Toja. TJ Ltd | Information & communication | 2019 |
| Tojostyuk Limited | Transport & logistics | 2024 |
| Tokada Services Limited | Administrative & support | 2010 |
| Tolcarn Property Ltd | Real estate | 2017 |
| Tollcross Freight Management Ltd | Transport & logistics | 2025 |
| Tollgate Court (Claydon) Management Company Limited | Extraterritorial | 2010 |
| Tollgate Tyre & Exhaust Centre Limited | Wholesale & retail | 2001 |
| TOM Beaumont Limited | Professional & scientific | 2010 |
| TOM Brown on Purpose Ltd | Professional & scientific | 2023 |
| TOM Francis Limited | Information & communication | 2008 |
| TOM Lyon Tree Services Limited | Administrative & support | 2012 |
| TOM Ward Consulting Limited | Professional & scientific | 2011 |
| Tom's House Ltd | Real estate | 2024 |
| Tomas Trans Ltd | Transport & logistics | 2024 |
| Tomlin Personnel Limited | Administrative & support | 2015 |
| Tomline Court Management Company Limited | Households | 1995 |
| Tommytester Holdings LLP | | 2025 |
| Tomorrow Today Ventures Ltd | Financial services | 2023 |
| Tomzap Ltd | Transport & logistics | 2023 |
| Tonade Ltd | Real estate | 2020 |
| Tono Services Limited | Administrative & support | 2023 |
| Tony Flower and Associates (Property Preservation Specialists) Limited | Administrative & support | 2002 |
| Tony White Joinery Limited | Construction | 2002 |
| Tools With a Mission | Manufacturing | 2004 |
| Toothbrush Apartments Ltd | Hospitality | 2018 |
| Toothbrush Services Ltd | Administrative & support | 2019 |
| Top Flite Electrical Limited | Manufacturing | 2013 |
| Top Flite Professional Properties Limited | Real estate | 2023 |
| Top Floors (East Anglia) Limited | Construction | 2010 |
| Top League Properties Ltd | Construction | 2024 |
| Top Legacy Ltd | Wholesale & retail | 2026 |
| Top One Marketing Ltd | Wholesale & retail | 2026 |
| Top Plumb SW Ltd | Construction | 2024 |
| Top Right Consulting Ltd | Professional & scientific | 2023 |
| Top Technical Solutions Ltd. | Information & communication | 2016 |
| Topcos Beauty Products Ltd | Manufacturing | 2021 |
| Toramanoglu Ltd | Hospitality | 2017 |
| Toro Grips Limited | Information & communication | 2008 |
| Torup Holding Ltd | Financial services | 2025 |
| Total Agility Limited | Information & communication | 2011 |
| Total Football Ipswich Ltd | Wholesale & retail | 2018 |
| Total Gymnastics Ipswich Ltd | Wholesale & retail | 2020 |
| Total Milling Solutions Ltd | Manufacturing | 2014 |
| Total Roofing Limited | Construction | 2015 |
| Total Safety Solutions International Ltd | Wholesale & retail | 2019 |
| Total Solution Computing (East Anglia) Limited | Information & communication | 2006 |
| Total Solutions London Ltd | Professional & scientific | 2025 |
| Total Transport Compliance Limited | Professional & scientific | 2018 |
| Totem Corporation Limited | Real estate | 2010 |
| Tottenham Business Safe CIC | Professional & scientific | 2024 |
| Totum Connect Ltd | Information & communication | 2020 |
| Toucan Trading Limited | Wholesale & retail | 1987 |
| Touch of Colors Interiors Ltd | Construction | 2019 |
| Touch of Colors Ltd | Construction | 2018 |
| Touchdown Charging Ltd | Administrative & support | 2016 |