| Trailblazerx Ltd | Information & communication | 2019 |
| Trailmix Property Ltd | Real estate | 2023 |
| Trails SRI Lanka Limited | Hospitality | 2025 |
| Training & Certification Solutions Ltd | Professional & scientific | 2026 |
| Training 46 Limited | Education | 2013 |
| Training Response Alliance Limited | Education | 2026 |
| Training, Investment & Leisure Since 1964 Ltd | Wholesale & retail | 2025 |
| Tranceform Limited | Extraterritorial | 2013 |
| Trandsam Limited | Real estate | 2023 |
| Tranquility Limited | Real estate | 1995 |
| Trans Know Services Limited | Professional & scientific | 2025 |
| Transalation Services Ltd | Professional & scientific | 2025 |
| Transatlantic Translations Limited | Administrative & support | 2006 |
| Transco (Wolverhampton) Limited | Real estate | 1990 |
| Transform.Me Consulting Ltd | Professional & scientific | 2023 |
| Transforma Solutions Ltd | Real estate | 2010 |
| Transformu by BM Ltd | Wholesale & retail | 2025 |
| Transition Support and Accommodation Ltd | Health & social care | 2023 |
| Transport Colets A&L Ltd | Transport & logistics | 2025 |
| Transport PJ Ltd | Administrative & support | 2018 |
| Travaux Limited | Professional & scientific | 2021 |
| Travel Business Works Ltd | Administrative & support | 2023 |
| Travel DE Guru Ltd | Administrative & support | 2024 |
| Travel Express Limited | Transport & logistics | 2001 |
| Travel Legacy Limited | Wholesale & retail | 2025 |
| Travel to Sky Ltd | Administrative & support | 2026 |
| Travel to Umrah Ltd | Administrative & support | 2025 |
| Traw Limited | Professional & scientific | 2021 |
| Trcc Holdings Limited | Health & social care | 2018 |
| TRD Motors Ltd | Water & waste | 2026 |
| TRE Medical Services Limited | Wholesale & retail | 2018 |
| Treacle Management Ltd | Information & communication | 2023 |
| Treacle Tech Ltd | Information & communication | 2023 |
| Treadguard UK Ltd | Wholesale & retail | 2024 |
| Treads (Wolverhampton) Limited | Wholesale & retail | 2004 |
| Treads Willenhall Limited | Other services | 2022 |
| Treadstone Group Holdings Ltd | Professional & scientific | 2025 |
| Treasure in Well Ltd | Wholesale & retail | 2025 |
| Treble Connect Ltd | Real estate | 2025 |
| Treble Pumping Services Limited | Extraterritorial | 1974 |
| Tree Bridge Care Ltd | Health & social care | 2025 |
| Tree Patrol Limited | Agriculture & fishing | 2020 |
| Treepatisserie Ltd | Transport & logistics | 2019 |
| Treetops (Midlands) Limited | Health & social care | 2010 |
| TREEWORK24 Ltd | Agriculture & fishing | 2025 |
| Trending Movies Limited | Professional & scientific | 2025 |
| Trendivaa Ltd | Wholesale & retail | 2026 |
| Trendivo Global Limited | Wholesale & retail | 2025 |
| Trendmsk Ltd | Wholesale & retail | 2026 |
| Trendoloft Ltd | Wholesale & retail | 2026 |
| Trendsbolt Limited | Wholesale & retail | 2024 |
| Trendtide Ltd | Wholesale & retail | 2024 |
| Trendy House Ltd | Wholesale & retail | 2025 |
| Trendz Clothing UK Ltd | Wholesale & retail | 2023 |
| Trendzz Ltd | Wholesale & retail | 2025 |
| Trevix Retail Ltd | Wholesale & retail | 2026 |
| Trexakarn Limited | Construction | 1974 |
| Triaxis Property Ltd | Real estate | 2025 |
| Tributary Ltd | Health & social care | 2019 |
| Tricia Care Limited | Administrative & support | 2023 |
| Trident Global Ltd | Professional & scientific | 2018 |
| Trident Training UK Ltd | Information & communication | 2005 |
| Triffiq Limited | Professional & scientific | 2016 |
| Trika Retail Ltd | Wholesale & retail | 2025 |
| Trilogy Accountancy Services Limited | Professional & scientific | 2003 |
| Trilogy Accountants and Tax Advisors Limited | Professional & scientific | 2009 |
| Trilogy Accountants Limited | Professional & scientific | 2008 |
| Trilogy Counselling Limited | Health & social care | 2015 |
| Trilogy Estate Agents Limited | Real estate | 2016 |
| Trilogy Investments (WM) Ltd | Real estate | 2020 |
| Trilogy Law Limited | Professional & scientific | 2008 |
| Trilogy Limited | Professional & scientific | 2006 |
| Trim Films Limited | Information & communication | 2014 |
| Trinexa Tech Ltd | Information & communication | 2026 |
| Trinity Court Management Services Limited | Real estate | 2007 |
| Trinity Outsourcing Solutions Ltd | Administrative & support | 2018 |
| Trins Collective Ltd | Wholesale & retail | 2024 |
| Trio Payments Solutions Ltd | Administrative & support | 2022 |
| Trionic Computing Limited | Information & communication | 2015 |
| Trip to Ltd | Wholesale & retail | 2025 |
| Triple a Law Limited | Professional & scientific | 2022 |
| Triple AJ Diagnostics Limited | Health & social care | 2024 |
| Triple GZ Limited | Information & communication | 2020 |
| Triple M Property Consultants Limited | Real estate | 2024 |
| Triple Peak Scaffolding Ltd | Construction | 2025 |
| Trippie Solutions Limited | Information & communication | 2026 |
| Trippjeans Limited | Wholesale & retail | 2026 |
| Tripple G Enterprises Ltd | Wholesale & retail | 2026 |
| Tripsmart Limited | Professional & scientific | 2023 |
| Trisentra Limited | Construction | 2025 |
| Trissino Consulting Ltd | Professional & scientific | 2025 |
| Tristar Homes Ltd | Real estate | 2019 |
| Tristram Creative Ltd | Other services | 2013 |
| Trivo Creatives Ltd | Information & communication | 2026 |
| TRK Electrics Ltd | Construction | 2026 |
| Tropical Care Limited | Public administration | 2023 |
| Troy Toys Limited | Financial services | 2025 |
| TRR Healthcare Provider Ltd | Extraterritorial | 2016 |
| TRU Hair Birmingham Ltd | Wholesale & retail | 2025 |
| TRU Hair Ltd | Wholesale & retail | 2022 |