| Tefora Garden Limited | Wholesale & retail | 2025 |
| Tegaize Blaster Ltd | Wholesale & retail | 2023 |
| TEK REY Ltd | Information & communication | 2023 |
| Tekkor Ltd | Extraterritorial | 2024 |
| Teknoma Ltd | Administrative & support | 2025 |
| Tektra Fabrication Ltd | Manufacturing | 2025 |
| Telford Park Investments Limited | Professional & scientific | 2006 |
| Telford Park Properties LLP | | 2007 |
| Telleon Ltd | Professional & scientific | 2021 |
| Telyoyo Technologies Ltd | Wholesale & retail | 2025 |
| Temp SS Ltd | Hospitality | 2025 |
| Temple Property Services Ltd | Real estate | 2026 |
| Tempo Youth Services CIC | Education | 2025 |
| TEN Million Limited | Wholesale & retail | 2025 |
| Tenacious Maple Limited | Other services | 2019 |
| Tenasha Limited | Wholesale & retail | 2025 |
| Tenastelin LLP | | 2015 |
| Tenaya Sanborn Ltd | Wholesale & retail | 2025 |
| Tenfoot Property Ltd | Real estate | 2025 |
| Tenlanes Ltd | Wholesale & retail | 2025 |
| Tennyson Court Residents (Bricket Wood) Limited | Real estate | 1994 |
| Teno Global Ltd | Wholesale & retail | 2026 |
| Tentacles Consultancy Limited | Professional & scientific | 2023 |
| Teqnotes Ltd | Information & communication | 2026 |
| Tequila Touch Ltd | Wholesale & retail | 2026 |
| Teraminds Ltd | Wholesale & retail | 2025 |
| Terava Ltd | Wholesale & retail | 2025 |
| Teravent Limited | Information & communication | 2023 |
| Terence Owen Limited | Extraterritorial | 2022 |
| Terence-John Owen Unlimited | Extraterritorial | 2024 |
| Teresa Faith Ltd | Manufacturing | 2019 |
| Terra Herbal Beads Ltd | Manufacturing | 2025 |
| Terra NOW Travel Ltd | Administrative & support | 2026 |
| Terra Property Invest Ltd | Administrative & support | 2025 |
| Terrabridge Ltd | Wholesale & retail | 2025 |
| Terrance Arthur Properties Ltd | Real estate | 2025 |
| Terrasphere Trading Ltd | Wholesale & retail | 2025 |
| Terraz Creations Ltd | Wholesale & retail | 2025 |
| Terrcealouth Maurice Ltd | Wholesale & retail | 2025 |
| Terry Owen Limited | Extraterritorial | 2023 |
| Tertio Ltd | Education | 2020 |
| Teshauthox Motors Ltd | Wholesale & retail | 2026 |
| Teskies Ltd | Wholesale & retail | 2026 |
| Tessa Hughes Ltd. | Education | 2024 |
| Tetrachem Limited | Administrative & support | 2015 |
| Texvora Ltd | Manufacturing | 2025 |
| Teyoro Ltd | Wholesale & retail | 2025 |
| Tezlo Ltd | Information & communication | 2025 |
| TF Property Investment Ltd | Construction | 2020 |
| TF Property Management Limited | Real estate | 2012 |
| Tfmg Holding 004 Ltd | Real estate | 2021 |
| Tfmg Holding 001 Ltd | Real estate | 2020 |
| Tfmg Holding 002 Ltd | Real estate | 2020 |
| Tfmg Holding 003 Ltd | Real estate | 2021 |
| TG20 Scaffolding Ltd | Construction | 2019 |
| Tgbk Limited | Construction | 2025 |
| Tgideas Trading Ltd | Wholesale & retail | 2024 |
| TGM Finds Limited | Wholesale & retail | 2026 |
| TGW Energy System Ltd | Manufacturing | 2024 |
| TH Financial Advice Limited | Professional & scientific | 2022 |
| TH Spaces Ltd | Real estate | 2022 |
| Thalassa Trade Investments Co., Ltd | Wholesale & retail | 2025 |
| Thalorin Ltd | Wholesale & retail | 2025 |
| Thamesbridge Trading Ltd | Wholesale & retail | 2025 |
| Thamesgate Capital Limited | Financial services | 2023 |
| Thamestrade Direct Ltd | Wholesale & retail | 2025 |
| Thankelyx Reply Pages Ltd | Information & communication | 2026 |
| Thanker Industry Co., Limited | Administrative & support | 2023 |
| Thankora Reply Pages Ltd | Information & communication | 2026 |
| Thao Contractors (UK) Ltd | Wholesale & retail | 2016 |
| That Medic Ltd | Information & communication | 2019 |
| Thatee Gateway UK Ltd | Information & communication | 2024 |
| THE 1ST Academy Ltd | Education | 2026 |
| THE 1ST Limited Group Ltd | Education | 2026 |
| THE 6TH River (Southern) Ltd | Real estate | 2021 |
| THE Ace Products Limited | Wholesale & retail | 2025 |
| THE AFD Group Limited | Financial services | 2025 |
| THE Africa Guide Ltd | Information & communication | 2024 |
| THE AI Workshop C.I.C. | Education | 2025 |
| THE Albox Company Limited | Manufacturing | 2021 |
| THE Alignment Specialists Ltd | Wholesale & retail | 2025 |
| THE Anglers Armoury Ltd | Wholesale & retail | 2026 |
| THE ARK of Glory Global Ministries Ltd UK | Other services | 2025 |
| THE Armitage Partnership LLP | | 2024 |
| THE Art Fanatics Ltd | Wholesale & retail | 2023 |
| THE Artistic Embroider Ltd | Wholesale & retail | 2023 |
| THE Ashbourne Property Group Limited | Financial services | 2023 |
| THE Aura's Touch Ltd | Arts & recreation | 2025 |
| THE Beauty Business School Limited | Information & communication | 2025 |
| THE Birchester Group Limited | Information & communication | 2017 |
| THE Blind DJ Ltd | Arts & recreation | 2021 |
| THE Bloom MAP Limited | Information & communication | 2025 |
| THE Bold Mellon Collective C.I.C. | Arts & recreation | 2021 |
| THE Breastfeeding Mentor Ltd | Health & social care | 2022 |
| THE Brightview Consult UK Ltd | Construction | 2026 |
| THE British Society of Dowsers | Other services | 1987 |
| THE Burton Hotel Ltd | Hospitality | 2023 |
| THE Caribbean Food Plug Ltd | Hospitality | 2025 |
| THE Caribbean Spot Catering Limited | Hospitality | 2021 |
| THE Caribbean Spot Limited | Wholesale & retail | 2015 |