| Trendora Ltd | Wholesale & retail | 2023 |
| Trendythreads Ltd | Wholesale & retail | 2024 |
| Trendyurban Ltd | Wholesale & retail | 2025 |
| Trendyzar Ltd | Wholesale & retail | 2025 |
| Trevor Greenwood Plumbing & Heating Ltd | Construction | 2011 |
| Tribe Official Limited | Wholesale & retail | 2026 |
| Trident Medical Limited | Education | 2019 |
| Trident Nutrition & Training Ltd | Education | 2015 |
| Trihozkos Ltd | Wholesale & retail | 2025 |
| Trilogy Incorp Limited | Extraterritorial | 2025 |
| Trim Hair Salon Ltd | Other services | 2019 |
| Trimax SKM Ltd | Wholesale & retail | 2019 |
| Trimline Roofing Limited | Construction | 2017 |
| Trimontium Limited | Administrative & support | 2021 |
| Trinitas Computantis Ltd | Professional & scientific | 2024 |
| Trinnacle Developments Ltd | Construction | 2021 |
| Trinovaq Ltd | Information & communication | 2025 |
| Triple Allied Services Ltd | Administrative & support | 2016 |
| TRIPLE9 Mobile Tyres. Ltd | Wholesale & retail | 2026 |
| Trippier Dale Ltd | Hospitality | 2020 |
| Tripzen Limited | Administrative & support | 2025 |
| Trisof Ltd | Information & communication | 2025 |
| Trivex Official Ltd | Wholesale & retail | 2026 |
| TRM Leisure Ltd | Wholesale & retail | 2025 |
| Troll Access Ltd | Professional & scientific | 2019 |
| Tropitan & Co Ltd | Wholesale & retail | 2022 |
| Trough Gate Ltd | Hospitality | 2023 |
| Trouvay & Cauvin (Holdings) Limited | Professional & scientific | 2011 |
| TRS UK (Agents) Limited | Manufacturing | 2005 |
| TRS UK (Holdings) Limited | Manufacturing | 2015 |
| TRU Syndicate Ltd | Professional & scientific | 2014 |
| Trucare Professionals Ltd | Health & social care | 2022 |
| Trucks N Parts MCR Ltd | Wholesale & retail | 2020 |
| Truehaven Trading Ltd | Administrative & support | 2025 |
| Truepath Estates Ltd | Real estate | 2024 |
| Truetech Consultants Ltd | Information & communication | 2025 |
| Truplumb Limited | Construction | 2017 |
| Trusted Hands Recruitment Ltd | Administrative & support | 2022 |
| Trusted Motors Limited | Wholesale & retail | 2024 |
| Trusted Motors MCR Ltd | Wholesale & retail | 2026 |
| Trusthouze Legal Services Ltd | Professional & scientific | 2023 |
| Trustline BPO Ltd | Wholesale & retail | 2025 |
| Truth Day Ltd | Extraterritorial | 2018 |
| Try-Cycles Limited | Arts & recreation | 2007 |
| TRZ Ltd | Wholesale & retail | 2026 |
| TS Financial Ltd | Professional & scientific | 2024 |
| TSC Living Ltd | Real estate | 2025 |
| TSD (South Yorkshire) Ltd | Hospitality | 2020 |
| Tshadez Global Limited | Wholesale & retail | 2026 |
| Tsiyyon Limited | Real estate | 2017 |
| TSK Accrue Limited | Wholesale & retail | 2021 |
| Tsrn Homes Ltd | Real estate | 2024 |
| Tstl Developments Limited | Construction | 2022 |
| TSU Shop Limited | Real estate | 2024 |
| TT and Training Limited | Education | 2020 |
| TT Expert Movers Ltd | Transport & logistics | 2024 |
| TTK Structural Limited | Professional & scientific | 2022 |
| Ttlc Consulting Ltd | Professional & scientific | 2025 |
| TTX Warehousing & Distribution Limited | Transport & logistics | 2007 |
| Tubeform Fabrications Limited | Manufacturing | 1981 |
| Tubz Limited | Real estate | 2019 |
| Tudor Construction (Cheshire) Limited | Construction | 2007 |
| Tuedge Ltd | Professional & scientific | 2022 |
| Tuffboxes Limited | Manufacturing | 2023 |
| Tulsi Store Ltd | Wholesale & retail | 2025 |
| Tumak Services Limited | Health & social care | 2018 |
| Tumbare Ltd | Health & social care | 2023 |
| Tumbles Catering Ltd | Hospitality | 2014 |
| Tunshill Construction Ltd | Construction | 2008 |
| Turbine Studios North Limited | Information & communication | 2025 |
| Turbo Motion Limited | Wholesale & retail | 2023 |
| Turbo Servis Ltd. | Wholesale & retail | 2023 |
| Turbo Transit Logistics Ltd | Transport & logistics | 2025 |
| Turboworkwear Ltd | Wholesale & retail | 2025 |
| Turii Ltd | Health & social care | 2025 |
| Turk Plast Ltd | Manufacturing | 2025 |
| Turn Two Insurance Brokers Limited | Financial services | 2017 |
| Turnaround Support 24 Limited | Health & social care | 2024 |
| Turner & Sons Property Developments Ltd | Real estate | 2026 |
| Turnkey Projects & Solutions Ltd | Information & communication | 2016 |
| Turnpike (Ashton) Ltd | Hospitality | 2011 |
| TV Cops Ltd | Information & communication | 2021 |
| TVM Ltd | Real estate | 2025 |
| TW Prime UK Ltd | Wholesale & retail | 2026 |
| Twelve Twenty Eight Ltd | Extraterritorial | 2023 |
| Twenty Five Property Ltd | Real estate | 2024 |
| TWENTY20 Marketing Ltd | Professional & scientific | 2024 |
| Twentythree Properties Ltd | Real estate | 2020 |
| Twin Aspect Limited | Information & communication | 2024 |
| Twin Security Systems Ltd | Administrative & support | 2015 |
| Twin Turbo Holdings Limited | Real estate | 2025 |
| Twingo Civils Ltd | Construction | 2025 |
| Twinkle NW Ltd | Wholesale & retail | 2024 |
| Twinkle Toes Daycare Ltd | Health & social care | 2024 |
| TWIRL360UK Photo Booth Ltd | Information & communication | 2022 |
| Twirls & Pearls Ltd | Professional & scientific | 2025 |
| Twisted Designs Ltd | Professional & scientific | 2017 |
| Two Apples Cafe Ltd | Hospitality | 2018 |
| Two Bridges Estates Ltd | Real estate | 2016 |
| Twp.Developments Ltd | Construction | 2019 |