| Tejery Property Group Limited | Real estate | 2023 |
| Terry Hearn Ltd | Information & communication | 2020 |
| TG Partners Ltd | Information & communication | 2021 |
| TGB Rigging Services Limited | Construction | 2024 |
| Tgoas Creative Ltd | Real estate | 2025 |
| Thbc Ltd | Wholesale & retail | 2023 |
| THE AI Agency Ltd | Professional & scientific | 2023 |
| THE Bleach Project Ltd | Wholesale & retail | 2025 |
| THE Ceylo Kitchen Limited | Hospitality | 2026 |
| THE City Directorate Group Limited | Administrative & support | 1999 |
| THE Classic Rock Radio Station Limited | Information & communication | 1993 |
| THE Claudia Clinic Ltd | Other services | 2025 |
| THE Climate App Ltd | Professional & scientific | 2021 |
| THE Entertainment Lighting Company Limited | Wholesale & retail | 1996 |
| THE Executive Forum Group Ltd | Other services | 2026 |
| THE Hikers Mike Residents Association Limited | Professional & scientific | 1995 |
| THE Hive Beekeeping Ltd | Agriculture & fishing | 2024 |
| THE Hive Honey Shop Ltd | Agriculture & fishing | 2024 |
| THE Honey Shop Ltd | Agriculture & fishing | 2025 |
| THE Lavender Spa Ltd. | Education | 2013 |
| THE Legno Group Ltd | Manufacturing | 2026 |
| THE Links Centre 2030 CIC | Professional & scientific | 2021 |
| THE London Talent Group Ltd | Arts & recreation | 2024 |
| THE Luxury Comp Collective Ltd | Arts & recreation | 2025 |
| THE Neon Thread Ltd | Professional & scientific | 2019 |
| THE Original Roast Ltd | Extraterritorial | 2020 |
| THE Osman Surgical Group Ltd | Health & social care | 2023 |
| THE Owners Club UK Limited | Wholesale & retail | 1994 |
| THE Performance Purpose Group Limited | Professional & scientific | 2016 |
| THE Pippins (Kingswood) Management Company Limited | Households | 2013 |
| THE Polish Way Ltd | Hospitality | 2019 |
| THE Red Front Door CIC | Health & social care | 2021 |
| THE Robbos Family Ltd | Real estate | 2020 |
| THE Root Field Management Company Limited | Professional & scientific | 1995 |
| THE Social Event Company Limited | Arts & recreation | 2023 |
| THE Super Zoom Dance Lesson Company Limited | Other services | 2022 |
| THE Surrey Hills Gardener Ltd | Administrative & support | 2019 |
| THE Total Works Company Ltd | Extraterritorial | 2015 |
| THE Village Tailors Ltd | Manufacturing | 2012 |
| THE Watergardens (Kingston) Management Company Limited | Households | 1988 |
| Thedreamers Ltd | Hospitality | 2019 |
| Theraceworks Ltd | Wholesale & retail | 2026 |
| Thomas Adams Build Ltd | Construction | 2026 |
| Thomas Plumbing Ltd | Construction | 2020 |
| Thompson Windows UK Ltd | Construction | 2016 |
| Thundercrest Limited | Construction | 1983 |
| Tidybrick Ltd | Construction | 2014 |
| Timeless Tours Ltd | Administrative & support | 2011 |
| TIMELESS2TOUCH Ltd | Hospitality | 2026 |
| Tiny Dancer Holdings (UK) Ltd | Professional & scientific | 2012 |
| TJRENTALS2026 Ltd | Real estate | 2026 |
| Todd Consultants Ltd | Professional & scientific | 2017 |
| Tomato Tantrum Ltd | Information & communication | 2018 |
| Tonetherapy Ltd | Wholesale & retail | 2025 |
| Top Spinning Limited | Other services | 2025 |
| Total Security & Fire Systems Limited | Administrative & support | 2023 |
| Totalenergies GAS & Power Holdings UK Ltd | Professional & scientific | 1991 |
| Totalenergies GAS & Power Limited | Energy | 1987 |
| Totalenergies GAS & Power Services UK Ltd | Financial services | 1990 |
| Toxic Design UK Ltd | Professional & scientific | 2022 |
| TP & Groundworks Ltd | Construction | 2025 |
| Transmutation (London) Limited | Administrative & support | 1986 |
| Transync Consultancy Ltd | Administrative & support | 2020 |
| Treadstone Installations Ltd | Administrative & support | 2025 |
| Trinity Delta Research Ltd | Financial services | 2015 |
| Trio Partners LLP | | 2021 |
| Trio Planning LLP | | 2021 |
| Trio Property Partners LLP | | 2020 |
| Triumvir Ltd | Information & communication | 2024 |
| True Balance Accountancy Ltd | Professional & scientific | 2025 |
| Trutina Consultants Ltd | Professional & scientific | 2022 |
| Tscglobal Ltd | Information & communication | 2025 |
| Tseec Ltd | Professional & scientific | 2014 |
| Tudor Court (Tadworth Park) Limited | Households | 1987 |
| Tunafi Ltd | Wholesale & retail | 2017 |
| Tunnel Road Management Company Limited | Households | 2020 |
| Twelve Acres Cleaning Company Ltd | Administrative & support | 2022 |
| Twelve Acres Management Limited | Administrative & support | 2025 |
| Twenty 208 Ltd | Real estate | 2024 |
| UK Business Mentoring Group Ltd | Professional & scientific | 2015 |
| UK Business Training Ltd | Professional & scientific | 2012 |
| UK DC Limited | Other services | 2022 |
| UK Zambian Events Ltd | Hospitality | 2025 |
| Unique Beginnings Childcare Ltd | Health & social care | 2021 |
| Unique Experience Global Ltd | Hospitality | 2023 |
| Universal Exports (England) Ltd | Real estate | 2022 |
| Unlimited Brand Solutions Ltd | Information & communication | 2019 |
| Upstream Finance Technologies Limited | Hospitality | 2019 |
| Urban Study Partners LLP | | 2015 |
| Ursa Risk Solutions Limited | Professional & scientific | 2025 |
| Usherwood Close Management Company Ltd. | Households | 1990 |
| Utility Wolf Limited | Construction | 2010 |
| V a E Enterprises Limited | Hospitality | 2019 |
| Varunisha Ltd | Other services | 2022 |
| Vector Driving School Ltd | Transport & logistics | 2020 |
| Veda Business Services Ltd | Professional & scientific | 2024 |
| Venture Pilot Ltd | Information & communication | 2019 |
| Veylz Ltd | Information & communication | 2026 |
| VHC Medical Limited | Health & social care | 2019 |
| Vibefind Ltd | Information & communication | 2022 |