| Travel Finders Ltd | Administrative & support | 2025 |
| Travel-Me Ltd | Administrative & support | 2013 |
| Travelglobe Limited | Other services | 2018 |
| Travelpack Limited | Administrative & support | 2015 |
| Travelpack Marketing & Leisure Services Limited | Administrative & support | 1985 |
| Travelpack Sports Limited | Administrative & support | 1993 |
| Traveltonic Transport Ltd | Transport & logistics | 2025 |
| Travelux Services Ltd | Transport & logistics | 2018 |
| Travvia Global Limited | Professional & scientific | 2025 |
| Treasurehub.Com. Limited | Wholesale & retail | 2024 |
| Treat ME Beauty Limited | Other services | 2013 |
| Treaty Lifting Ltd | Construction | 2020 |
| Tree of Life Real Estates Ltd | Real estate | 2020 |
| Trehawke Properties Ltd | Real estate | 2023 |
| Tremarnah Ltd | Professional & scientific | 2020 |
| Trend Tappers Ltd | Other services | 2023 |
| Trendblaze Ltd | Wholesale & retail | 2023 |
| Trends Market Ltd | Wholesale & retail | 2025 |
| Trendy Spaces Limited | Construction | 2013 |
| Trenmead Limited | Manufacturing | 1979 |
| Trhj Group Limited | Information & communication | 2025 |
| Tri-Care Group Ltd | Administrative & support | 2022 |
| Tri-Circle Food Co. Limited | Extraterritorial | 2015 |
| Tri-Circle Food Limited | Manufacturing | 2006 |
| Triangle Business Services Limited | Professional & scientific | 2022 |
| Triangle Foods Ltd | Manufacturing | 2024 |
| Triangle Legal Services Limited | Professional & scientific | 2022 |
| Tribe Yarns Ltd | Wholesale & retail | 2018 |
| Tribeca Capital Limited | Real estate | 2017 |
| Trifan Transport Ltd | Transport & logistics | 2024 |
| Trijit Limited | Information & communication | 2014 |
| Trill Labs Limited | Information & communication | 2025 |
| Trinity Corporate Finance Limited | Professional & scientific | 2020 |
| Trinity Corporate Limited | Financial services | 2013 |
| Trinity House and Homes Ltd | Real estate | 2021 |
| Trinity Man-Force Limited | Construction | 2019 |
| Trinity Road LP | | 2010 |
| Trinity Trustees Limited | Professional & scientific | 2007 |
| Trinity Universal Holdings Limited | Wholesale & retail | 2026 |
| Trio Tech Investments Limited | Administrative & support | 2011 |
| Triology Properties Ltd | Real estate | 2021 |
| Trip County Ltd | Administrative & support | 2017 |
| Trip Rodeo Limited | Professional & scientific | 2025 |
| Triple a Global Trade Ltd | Wholesale & retail | 2026 |
| Triple V Ltd | Real estate | 2025 |
| Tripmato Limited | Administrative & support | 2026 |
| Tripnext Global Ltd | Administrative & support | 2026 |
| Trips Guard Ltd | Transport & logistics | 2023 |
| Tris-Kom Sales Limited | Wholesale & retail | 1989 |
| Trishans Investments Ltd | Real estate | 2019 |
| Trishh Hair and Beauty Salon Ltd | Other services | 2023 |
| Trishul Construction Ltd | Construction | 2009 |
| Trishul Grocery and Wine Ltd | Wholesale & retail | 2023 |
| Tritara UK Ltd | Wholesale & retail | 2025 |
| Trivision Limited | Administrative & support | 2025 |
| Trivola Car Services Limited | Transport & logistics | 2025 |
| TRK Capital Limited | Real estate | 2016 |
| Trkconstractions Ltd | Construction | 2026 |
| Tropical Fruit & VEG. Limited | Wholesale & retail | 2004 |
| Tropical Treats Ltd | Hospitality | 2025 |
| Tropics Grill and Bites Ltd | Hospitality | 2016 |
| Troubadour Theatres Limited | Arts & recreation | 2017 |
| Troy Scaffolding Limited | Construction | 2019 |
| TRP Education Limited | Education | 2019 |
| Trrac Limited | Transport & logistics | 2025 |
| Truck Sameday Transport Ltd | Transport & logistics | 2026 |
| True Bar Co Limited | Hospitality | 2019 |
| True Beauty Aesthetics Ltd | Other services | 2011 |
| True Brew Co Ltd | Manufacturing | 2019 |
| True Colours London Ltd | Construction | 2022 |
| True Colours Painting & Furniture Ltd | Manufacturing | 2015 |
| True FOX Limited | Hospitality | 2019 |
| True FOX Trading Limited | Hospitality | 2019 |
| True Hackney Holdings Ltd | Financial services | 2019 |
| True Hackney Ltd | Hospitality | 2020 |
| True Hanbury Ltd | Real estate | 2019 |
| True Holloway Ltd | Hospitality | 2020 |
| True Image Care Ltd | Public administration | 2023 |
| True PUB Holdings Limited | Real estate | 2017 |
| True PUB Leases Limited | Real estate | 2019 |
| True Pubs Trading Limited | Hospitality | 2016 |
| True Residential Limited | Real estate | 2017 |
| Trueflame Engineering Ltd | Other services | 2025 |
| Truenorth Meridian Ltd | Professional & scientific | 2026 |
| Truetide AI Limited | Information & communication | 2025 |
| Truherb Trading Private Ltd | Wholesale & retail | 2020 |
| Trupules UK Ltd | Manufacturing | 2023 |
| Trusay Ltd | Wholesale & retail | 2026 |
| Trust Capital Property Limited | Real estate | 2015 |
| Trust-Build London Limited | Construction | 2007 |
| Trust-Capital London Limited | Real estate | 2015 |
| Trustt Transport Ltd | Transport & logistics | 2019 |
| Trustway Ltd | Transport & logistics | 2026 |
| TRY Excellent Properties UK Ltd | Real estate | 2023 |
| TS NON Exec Limited | Professional & scientific | 2024 |
| Tsaa Solutions Limited | Information & communication | 2014 |
| Tse-Amniyat Ltd | Administrative & support | 2011 |
| Tskk Services Limited | Information & communication | 2010 |
| TSP Investments Limited | Real estate | 2014 |
| TSS Franchise Ltd | Hospitality | 2025 |