| TB Capital Investment Ltd | Real estate | 2025 |
| TBH Services Limited | Transport & logistics | 2025 |
| Tbiom Limited | Education | 2025 |
| TBR Transport Ltd | Water & waste | 2021 |
| TCA Property Ventures Ltd | Real estate | 2023 |
| TCA Workforce Ltd | Administrative & support | 2023 |
| Tciv Engineering Ltd | Construction | 2015 |
| Tech DE Quantum Ltd | Information & communication | 2024 |
| Tech London Trading Ltd | Information & communication | 2022 |
| Tech Traders Worldwide Ltd | Wholesale & retail | 2019 |
| Tech Xpert World Wide Ltd | Information & communication | 2022 |
| Techne Private Ltd | Arts & recreation | 2014 |
| Techniqium Ltd | Information & communication | 2020 |
| Techno Gulf Limited | Construction | 2023 |
| Technoshop Ltd | Transport & logistics | 2020 |
| Techsophy Investments Ltd | Extraterritorial | 2016 |
| Techtuition Limited | Information & communication | 2012 |
| Teck Motors Limited | Wholesale & retail | 2019 |
| TEK Pharm. Ltd | Health & social care | 2022 |
| Tekinvo Ltd | Information & communication | 2025 |
| Tema Trading Limited | Manufacturing | 2019 |
| TEN Agents Ltd | Professional & scientific | 2023 |
| TEN Project Limited | Arts & recreation | 2018 |
| Tenkay Car Sales Limited | Wholesale & retail | 2023 |
| Tenorite Ltd | Professional & scientific | 2015 |
| Tentachost Ltd | Information & communication | 2021 |
| Teo's Tailor Limited | Other services | 2019 |
| TERAA13 Holdings Ltd | Financial services | 2022 |
| Terra Group Real Estate Ltd | Real estate | 2020 |
| Terra Line Design Ltd | Construction | 2026 |
| Tetteh Trading Limited | Administrative & support | 2014 |
| TEU Education Limited | Education | 2025 |
| Textiledo Ltd | Wholesale & retail | 2022 |
| Tezbuy Ltd | Other services | 2025 |
| TGI the Great Ideas Ltd | Construction | 2016 |
| TH Consultants Recruitment Specialists Limited | Administrative & support | 2020 |
| Thai PAN Ltd | Hospitality | 2019 |
| Thames Tour & Co UK Ltd | Administrative & support | 2025 |
| Thamils Arts and Education Centre (Taec UK) CIC | Health & social care | 2025 |
| Thana Design and Construction Ltd. | Construction | 2018 |
| Thaninayaga Mudali Seyur Ltd | Professional & scientific | 2011 |
| Thanyia Aesthetics Ltd | Other services | 2025 |
| Thatmart Limited | Wholesale & retail | 2025 |
| THC Hair Replacement Academy Limited | Administrative & support | 2017 |
| THE 24 HRS Chauffeurs Ltd | Transport & logistics | 2025 |
| THE Abbot PUB Ltd | Hospitality | 2023 |
| THE AQG Group Ltd | Wholesale & retail | 2024 |
| THE Ascension Trust | Other services | 2008 |
| THE Audition PAL Limited | Other services | 2022 |
| THE Aurora Way Ltd | Health & social care | 2025 |
| THE Bardot Group Limited | Administrative & support | 2023 |
| THE Bureau of Covert Operations Limited | Arts & recreation | 2025 |
| THE Care Advantage Limited | Health & social care | 2020 |
| THE Central Farm Ltd | Wholesale & retail | 2022 |
| THE City of London Dental School | Education | 2013 |
| THE Coffee Bloom Ltd | Hospitality | 2026 |
| THE Cotswolds Bear Ltd | Households | 2024 |
| THE Crust Holdings Ltd | Financial services | 2025 |
| THE Dulwich Trader Ltd | Wholesale & retail | 2009 |
| THE Encountr Group Limited | Wholesale & retail | 2025 |
| THE Flagship LDN Ltd | Wholesale & retail | 2023 |
| THE Floral Tea Co. Ltd | Professional & scientific | 2019 |
| THE Foot Space Podiatry Ltd | Health & social care | 2025 |
| THE GBX Sports Shop Limited | Arts & recreation | 2019 |
| THE Good Ship Lollypop Ltd | Arts & recreation | 2014 |
| THE Greater Health Tea Ltd | Wholesale & retail | 2025 |
| THE Group Glowup Ltd | Wholesale & retail | 2026 |
| THE Heer Enterprise Ltd | Wholesale & retail | 2023 |
| THE Holt Freehold Limited | Households | 2003 |
| THE Hospitality Group (Surrey) Limited | Hospitality | 2019 |
| THE Indians Next Door (Authentic Kitchen) Limited | Hospitality | 2014 |
| THE Inspired by YOU Collective Ltd | Education | 2025 |
| THE Key Alternative Provision CIC | Education | 2024 |
| THE Little A.R.K. CIC | Manufacturing | 2025 |
| THE Little Acts of Random Kindness CIC | Wholesale & retail | 2020 |
| THE Loft People Ltd | Construction | 2018 |
| THE London City BOY Ltd | Arts & recreation | 2016 |
| THE Matrescence Coach Limited | Health & social care | 2025 |
| THE Mind Behind Group Ltd | Information & communication | 2024 |
| THE Onslow Grange Company Limited | Financial services | 2026 |
| THE Orange Composition Ltd | Information & communication | 2014 |
| THE Pill Associates Ltd | Wholesale & retail | 2024 |
| THE Pixel Nurse Limited | Information & communication | 2026 |
| THE Pre-School Group Limited | Real estate | 2015 |
| THE Professionals of London Ltd | Transport & logistics | 2022 |
| THE Promoters International Ltd | Information & communication | 2025 |
| THE Redline Network Ltd | Professional & scientific | 2023 |
| THE Shepherd's Way Limited | Health & social care | 2016 |
| THE Sound Publishers Ltd | Information & communication | 2024 |
| THE Spreadsheetwiz Ltd | Professional & scientific | 2023 |
| THE Stoke Cleaners Ltd | Other services | 2025 |
| THE Vault Morden Ltd | Hospitality | 2024 |
| THE Vendors Ltd | Wholesale & retail | 2021 |
| THE Wardrobe Spa Ltd | Other services | 2025 |
| THE Xtwins Limited | Professional & scientific | 2008 |
| Therapy Journey Ltd | Health & social care | 2023 |
| Therapy Spaces Group Limited | Real estate | 2019 |
| Thermosys Ltd | Manufacturing | 2025 |
| Thesadeks Ltd | Financial services | 2024 |
| Thetabulouspassport Ltd | Professional & scientific | 2025 |