| Tint My Car Ltd | Wholesale & retail | 2020 |
| Tiny Rebels Soft Play Ltd | Arts & recreation | 2025 |
| Tiny Tail TCG Limited | Wholesale & retail | 2026 |
| Tioli Limited | Construction | 2013 |
| TIP Electrical Ltd | Construction | 2019 |
| TIP Top Electrical Services Limited | Construction | 2014 |
| TIP Top Properties London Ltd | Real estate | 2010 |
| Tipax Express Ltd | Real estate | 2024 |
| Tipsy Brothers Ltd | Hospitality | 2023 |
| Tipton Warwick Ltd | Real estate | 2022 |
| Tiramisu Cafeteria Ltd | Hospitality | 2024 |
| Tiriyan Limited | Manufacturing | 2017 |
| Tirol Ltd | Manufacturing | 2025 |
| Tirth Innovations Ltd | Professional & scientific | 2026 |
| Tirupati Honest Limited | Hospitality | 2026 |
| Tirupati VEG Restaurant Limited | Hospitality | 2025 |
| Tishimingo Productions Limited | Information & communication | 2005 |
| Titan Property and Development Ltd | Construction | 2025 |
| Titan Strategic Investments Hold Limited | Extraterritorial | 2014 |
| Titan ZAD Construction Ltd | Manufacturing | 2025 |
| Titancore Developments Ltd | Construction | 2025 |
| Titans Cleaners Limited | Administrative & support | 2023 |
| Tithe Academy | Education | 2011 |
| Tithe Farm Tyre & Service Centre Ltd | Wholesale & retail | 2016 |
| Tithi Ltd | Wholesale & retail | 2023 |
| Tithi Transport Ltd | Transport & logistics | 2025 |
| Titian Auto Groups Limited | Wholesale & retail | 2026 |
| Tivarus Care Ltd | Hospitality | 2024 |
| Tivoli DDV Ltd | Real estate | 2023 |
| Tiyan Realty Limited | Real estate | 2022 |
| Tiyasha Solutions Ltd | Extraterritorial | 2022 |
| TJ Alves Services Limited | Administrative & support | 2019 |
| TJ Buy to LET Limited | Real estate | 2022 |
| TJ Medics Limited | Health & social care | 2016 |
| TJ Power Engineering Ltd | Administrative & support | 2016 |
| TJ Property Holding Limited | Financial services | 2022 |
| TJ Property Renovations Limited | Construction | 2018 |
| TJ Serviced Accommodation Limited | Hospitality | 2022 |
| TJ Tade Ltd | Transport & logistics | 2022 |
| Tj's Kitchen Ltd | Hospitality | 2017 |
| TJB Construct Limited | Construction | 2015 |
| Tjda Holdings Ltd | Real estate | 2025 |
| Tjda London Limited | Wholesale & retail | 2022 |
| Tjmf & Co Ltd | Professional & scientific | 2021 |
| TJS Building Services Limited | Construction | 2018 |
| TJS Grab Services Limited | Transport & logistics | 2010 |
| TJS Trading Limited | Administrative & support | 2015 |
| TJW GRP Holding Limited | Financial services | 2024 |
| TK Accounts Limited | Professional & scientific | 2011 |
| TK Lyara Sparkle Limited | Administrative & support | 2026 |
| TK Property London Ltd | Real estate | 2020 |
| TK4U Ltd | Wholesale & retail | 2026 |
| TKD Tekkers Ltd | Other services | 2023 |
| Tkk-Consulting Ltd | Information & communication | 2020 |
| TKM Professional Services Limited | Professional & scientific | 2016 |
| Tkmk Group Ltd | Wholesale & retail | 2025 |
| TKR Properties Limited | Real estate | 2018 |
| Tkssm Ltd | Real estate | 2024 |
| Tkssm Properties Ltd | Real estate | 2024 |
| TKV Express Ltd | Wholesale & retail | 2019 |
| TL Insights Consultancy Limited | Professional & scientific | 2025 |
| TLC (Radlett) Limited | Administrative & support | 2014 |
| TLC (the Locum Company) Limited | Professional & scientific | 2026 |
| TLC Care Group (UK) Limited | Financial services | 2024 |
| TLC Care Group Limited | Financial services | 2020 |
| TLC Commercial Group Limited | Financial services | 2020 |
| TLC Construction Limited | Construction | 2014 |
| TLC Elderly Care (2015) Limited | Health & social care | 2015 |
| TLC Group (Holdings) Limited | Health & social care | 2015 |
| TLC Holistic Events Limited | Administrative & support | 2024 |
| TLC Hospitality Group Limited | Financial services | 2020 |
| TLC Therapy Ltd | Health & social care | 2023 |
| TLH Consultancy Limited | Professional & scientific | 2017 |
| Tlogy Infotech Limited | Information & communication | 2022 |
| Tlrg Ltd | Wholesale & retail | 2024 |
| TM (Holdings) Limited | Financial services | 2018 |
| TM Accountancy and Consultancy Ltd | Real estate | 2017 |
| TM Education Ltd | Public administration | 2024 |
| TM Infinity Estates Limited | Real estate | 2024 |
| TM Parent Company Limited | Financial services | 2024 |
| TM Real Estate Limited | Real estate | 2020 |
| TM Tree and Landscaping Ltd | Administrative & support | 2022 |
| TM Zuzu Ltd | Transport & logistics | 2021 |
| Tmkv Limited | Professional & scientific | 2022 |
| TML Utility Ltd | Construction | 2022 |
| TMP Drylining Ltd | Construction | 2024 |
| TMS Worldwide Ltd | Administrative & support | 2026 |
| TMT Transport Logistic Ltd | Transport & logistics | 2026 |
| Tmth Limited | Construction | 2026 |
| TMW Technologies Limited | Information & communication | 2023 |
| TN Amazonia Ltd | Information & communication | 2016 |
| TN Education Coaching and Mentoring Limited | Education | 2020 |
| TN1M Limited | Administrative & support | 2025 |
| TNJ Investments Ltd | Real estate | 2021 |
| TNK 88 Logistics Ltd | Transport & logistics | 2025 |
| TNP Accessories Limited | Wholesale & retail | 2021 |
| TNP Group Limited | Wholesale & retail | 2021 |
| TNP Properties London Ltd | Real estate | 2025 |
| TNP Property Ltd | Financial services | 2020 |
| TO a TEE Artificial Intelligence Ltd | Information & communication | 2018 |