| THE Soul LAB UK- Ltd | Manufacturing | 2023 |
| THE Sportsman Management Company Limited | Arts & recreation | 2012 |
| THE Summerhill Five Limited | Financial services | 2015 |
| THE Taste From India (WM) Limited | Hospitality | 2023 |
| THE TVR Chassis Shop Limited | Wholesale & retail | 2024 |
| THE Upright One Limited | Information & communication | 2012 |
| THE Van Alliance Limited | Wholesale & retail | 2022 |
| THE Vape Syndicate Ltd | Wholesale & retail | 2016 |
| THE Yacht LEG & Cradle Company Limited | Manufacturing | 1983 |
| Theehp Ltd | Professional & scientific | 2011 |
| Themayfairclub Ltd | Hospitality | 2020 |
| Theperfectprice Ltd | Wholesale & retail | 2020 |
| Thepipcollective Ltd | Information & communication | 2023 |
| Think Kitchen Transformations Ltd | Wholesale & retail | 2025 |
| Thinkingvisually Limited | Education | 2002 |
| Third Millennium Developments Limited | Real estate | 1996 |
| Third Millennium Estates Limited | Construction | 2000 |
| Thomas Nock Martin Audit Limited | Extraterritorial | 2011 |
| Thor Assistive Technologies Limited | Wholesale & retail | 2022 |
| Thor Partitioning Limited | Manufacturing | 2026 |
| Thor Safety Ltd | Manufacturing | 2018 |
| Thorn Acquisitionco Ltd | Financial services | 2021 |
| Thorngrove Property Limited | Real estate | 2024 |
| Thrift Place Limited | Wholesale & retail | 2024 |
| Thrill of the Find Ltd | Wholesale & retail | 2025 |
| Tibbetts Distribution Limited | Transport & logistics | 2022 |
| Ticket Dealer Limited | Wholesale & retail | 2023 |
| Tiger SA Holdings Ltd | Other services | 2018 |
| Tileland (Midlands) Limited | Wholesale & retail | 2004 |
| Tilepro Roofing Limited | Construction | 2025 |
| Tiles 4 U Limited | Wholesale & retail | 2019 |
| Time Past UK Ltd | Construction | 2020 |
| Timetools Limited | Wholesale & retail | 2007 |
| Tinsing Food Limited | Hospitality | 2025 |
| Tiny Acorn Consultancy Ltd | Information & communication | 2023 |
| Tiny-Treasuregem Ltd | Wholesale & retail | 2025 |
| Tisim Operatives Ltd | Transport & logistics | 2016 |
| Titan Infrastructure Ltd | Construction | 2026 |
| Titan Steel Construction Ltd | Construction | 2025 |
| Titan Wholesale Traders Ltd | Extraterritorial | 2024 |
| Titus Consulting Limited | Professional & scientific | 2025 |
| Tkaz Enterprise Limited | Health & social care | 2021 |
| Tkut-Auto Locksmith Ltd | Wholesale & retail | 2025 |
| TL Financial Services Ltd | Administrative & support | 2023 |
| Tlba Studios Ltd | Other services | 2024 |
| TM5 Properties Limited | Real estate | 2023 |
| Tmedcare Ltd | Health & social care | 2025 |
| TMR Lyfe Limited | Transport & logistics | 2023 |
| TMS Property Limited | Real estate | 2022 |
| TN7 Retail Ltd | Wholesale & retail | 2022 |
| Toksadem Ltd | Wholesale & retail | 2025 |
| Toksadem Safe.Food Haven Ltd | Hospitality | 2026 |
| TOM Binks Properties Limited | Real estate | 2026 |
| TOM Godson Limited | Wholesale & retail | 2001 |
| Tool Costing Limited | Professional & scientific | 2021 |
| Top Church Training | Education | 1997 |
| Top Notch Barbers Limited | Other services | 2017 |
| Topaz Live Calm Ltd | Administrative & support | 2017 |
| TPS Driver Hire Ltd | Transport & logistics | 2019 |
| Tradingscape Limited | Wholesale & retail | 2021 |
| Training Solutions (Midlands) Ltd | Education | 2013 |
| Trans Europa Trading Limited | Real estate | 1992 |
| Transair Site Services Ltd | Construction | 2025 |
| Transforming and Greening the Sahel Ltd | Agriculture & fishing | 2026 |
| Tranter Pigeon Lofts Limited | Construction | 2021 |
| Tranters Properties Ltd | Real estate | 2012 |
| Trapani & Co Accountants Ltd | Professional & scientific | 2019 |
| Trcinvestmentgroup Ltd | Real estate | 2019 |
| Trelonversa Ltd | Transport & logistics | 2017 |
| Treloveres Ltd | Transport & logistics | 2017 |
| Trevor Stuart Hair Design Ltd | Other services | 2017 |
| Trey Kang Properties Ltd | Real estate | 2023 |
| Tribulo Limited | Manufacturing | 2011 |
| Trident Access Scaffolding Limited | Construction | 2023 |
| Trident Plumbing Limited | Other services | 2012 |
| Trident Property Services Limited | Real estate | 2026 |
| Trigram Properties Limited | Professional & scientific | 2000 |
| Trimat Limited | Manufacturing | 1990 |
| Trimester Services Limited | Health & social care | 2026 |
| Triple Options Services Ltd | Administrative & support | 2024 |
| Trisolve Ltd | Wholesale & retail | 2023 |
| Trison Holdings Limited | Professional & scientific | 2010 |
| Trucker Ltd | Administrative & support | 2014 |
| True Creative Studio Limited | Professional & scientific | 2019 |
| True North Restaurants Limited | Hospitality | 2026 |
| True North Strategic Solutions Ltd | Professional & scientific | 2026 |
| Trusted Vets Limited | Professional & scientific | 2018 |
| Tsemx Ltd | Wholesale & retail | 2025 |
| TSM Solutions Limited | Transport & logistics | 2017 |
| TT Training Academy Limited | Professional & scientific | 2009 |
| Ttdream Limited | Hospitality | 2023 |
| TTE Associates Ltd | Professional & scientific | 2019 |
| TTR Consultation Ltd | Professional & scientific | 2023 |
| TTR Group Holdings Ltd | Financial services | 2024 |
| TTR Group Lettings Ltd | Real estate | 2024 |
| Tuckenhay Limited | Financial services | 2021 |
| Tudor Flats (Management) Limited | Households | 2018 |
| Tulipphone Ltd | Transport & logistics | 2017 |
| Tustain Holdings Limited | Financial services | 2022 |
| TV Olex Construction Ltd | Construction | 2025 |