| Timeline Exclusive Limited | Arts & recreation | 2018 |
| Timely Care Solution Ltd | Health & social care | 2018 |
| Times Digital Ltd | Professional & scientific | 2024 |
| Timescale Productions Ltd | Information & communication | 2020 |
| Timtim International Ltd | Wholesale & retail | 2023 |
| Tina Distribution International Ltd | Wholesale & retail | 2026 |
| Tiny Cubs Nursery Ltd | Health & social care | 2020 |
| Tiny Stars Ltd | Health & social care | 2022 |
| Tiny Trendz World Limited | Wholesale & retail | 2024 |
| TIP for Change Ltd | Other services | 2025 |
| TIP Top Studio Ltd | Other services | 2025 |
| Tip-Top Woodcrafts Ltd | Manufacturing | 2024 |
| Tipcap Network Solutions Ltd | Information & communication | 2019 |
| Tipper Connect Limited | Administrative & support | 2026 |
| Tiptop Laundry Ltd | Other services | 2024 |
| Tiptop Outlet Ltd | Wholesale & retail | 2020 |
| Tirana Brickwork Limited | Construction | 2020 |
| Tiro Property Ltd | Real estate | 2022 |
| Tirupati Infra Limited | Real estate | 2024 |
| Tiry Optics Ltd | Professional & scientific | 2024 |
| Tishetolu Healthcare Limited | Health & social care | 2015 |
| Tisid Global Ltd. | Administrative & support | 2022 |
| Tissaro X Ltd | Transport & logistics | 2025 |
| Titan Eco Ltd | Construction | 2024 |
| Titan Freight & Logistics Ltd | Hospitality | 2026 |
| Titan PCN Ltd | Health & social care | 2021 |
| Titan Platforms Limited | Construction | 2023 |
| Titan Route Solutions Ltd | Transport & logistics | 2026 |
| Titanhire Ltd | Administrative & support | 2025 |
| Titilayo Wellbeing Solutions Ltd | Health & social care | 2026 |
| TJ Courier 444 Ltd | Transport & logistics | 2023 |
| TJ Gold Buyers & Bullion Ltd | Wholesale & retail | 2025 |
| TJ Mahal Ltd | Hospitality | 2015 |
| Tj's Furniture Limited | Wholesale & retail | 2012 |
| Tj's Peri Peri Grill and Pizza Ltd | Hospitality | 2018 |
| TJJ Construction Limited | Construction | 2015 |
| Tjnag Ltd | Other services | 2019 |
| TJS Contractors Ltd | Construction | 2024 |
| TK - Perfect Ltd | Construction | 2014 |
| TK Automotive Solutions Ltd | Wholesale & retail | 2018 |
| TK Family Investment Ltd | Other services | 2017 |
| TK Fashions Ltd | Wholesale & retail | 2019 |
| TK Training Consultancy Limited | Administrative & support | 2016 |
| Tk&T Consulting Ltd | Information & communication | 2021 |
| TK9 Security and FM Solutions Ltd | Administrative & support | 2024 |
| Tkout Ltd | Hospitality | 2026 |
| TL 24/7 Plumbing Ltd | Construction | 2026 |
| TL Autos Limited | Wholesale & retail | 2021 |
| TL Residential Limited | Real estate | 2005 |
| TLA Rail Services Ltd | Construction | 2017 |
| TLX Ventures Ltd | Transport & logistics | 2026 |
| TM Motor Centre Ltd | Wholesale & retail | 2023 |
| TM Nainika Ltd | Wholesale & retail | 2025 |
| TM Training Centre Ltd | Administrative & support | 2020 |
| TM Utility Resource UK Limited | Other services | 2013 |
| TMC Partnership Ltd | Wholesale & retail | 2017 |
| Tmcontractinggroup Ltd | Construction | 2025 |
| TME Finance Limited | Financial services | 2025 |
| Tmibrahim Limited | Real estate | 2021 |
| TMK Cars Ltd | Wholesale & retail | 2016 |
| TMK Group Ltd | Other services | 2019 |
| TMK Real Estate Ltd | Real estate | 2024 |
| TMM Designs Ltd | Professional & scientific | 2025 |
| TMO Cleaning Services Limited | Administrative & support | 2025 |
| TMP Leasing Ltd | Real estate | 2024 |
| TMS Accountants Ltd | Professional & scientific | 2024 |
| TMS Hair Studio Ltd | Other services | 2025 |
| TNA Raja Limited | Transport & logistics | 2026 |
| TNR Accommodation Ltd | Real estate | 2024 |
| TNR Services Limited | Administrative & support | 2017 |
| TO Go Delivery Ltd | Financial services | 2019 |
| TO Logistics Ltd | Transport & logistics | 2015 |
| Tobli Brickwork Ltd | Construction | 2026 |
| Tobli Plastering Ltd | Construction | 2022 |
| TOC Waste Recycling Limited | Professional & scientific | 2011 |
| Todatem Healthcare Limited | Health & social care | 2025 |
| Todhunter Property Limited | Construction | 2025 |
| Todorov Stroi Solutions Ltd | Energy | 2024 |
| Toefl Test UK Limited | Education | 2019 |
| Toffs Executive Chauffeurs Ltd | Transport & logistics | 2015 |
| Tohur Miah Ltd | Financial services | 2022 |
| Toka Building Services Ltd | Construction | 2021 |
| Toki Products Limited | Wholesale & retail | 2017 |
| Tokko Limited | Education | 2012 |
| Tolani Limited | Professional & scientific | 2015 |
| Tolujoe Limited | Wholesale & retail | 2025 |
| TOM Ball Ltd | Information & communication | 2026 |
| TOM Doe's Fitness Ltd | Health & social care | 2012 |
| TOM Dyball Limited | Education | 2026 |
| TOM Kelly Services Ltd | Arts & recreation | 2025 |
| TOM Kelman CA Limited | Professional & scientific | 2020 |
| TOM TOM Audio Limited | Wholesale & retail | 2003 |
| Tomash and AGA Transport Limited | Transport & logistics | 2016 |
| Tomaster Services Ltd | Construction | 2017 |
| Tomaster Services UK. Ltd | Construction | 2025 |
| Tomdidit Limited | Arts & recreation | 2023 |
| Tomescutrans Ltd | Transport & logistics | 2025 |
| Tomi Build Ltd | Construction | 2020 |
| Tomi Shop UK Ltd | Wholesale & retail | 2026 |
| Tommy Simpson Ltd | Arts & recreation | 2026 |