| THE Online Sports Shop Limited | Wholesale & retail | 2016 |
| THE Other Richard Ltd | Professional & scientific | 2016 |
| THE Parenting Practitioner Ltd | Health & social care | 2025 |
| THE Physio Place Petersfield Ltd | Health & social care | 2025 |
| THE Picture Rights Company Limited | Information & communication | 2023 |
| THE Plannery Limited | Professional & scientific | 2023 |
| THE Plaster Collective Limited | Construction | 2018 |
| THE Pretty Hair Club Ltd | Other services | 2022 |
| THE Probate Bureau Financial Services Ltd | Professional & scientific | 2009 |
| THE Property Warehouse Limited | Construction | 2003 |
| THE Psychology Consortium Ltd | Health & social care | 2024 |
| THE Red MUD HUT Limited | Wholesale & retail | 2006 |
| THE Redbridge Music Lounge | Arts & recreation | 2012 |
| THE Sackey Group Ltd | Financial services | 2025 |
| THE Salon @ 74 Limited | Other services | 2018 |
| THE Schiller Education Company Limited | Education | 2013 |
| THE Seaspan (Clacton-On-Sea) Limited | Hospitality | 2025 |
| THE Shell Station UK Limited | Wholesale & retail | 2017 |
| THE Silver Place (London) Limited | Wholesale & retail | 2008 |
| THE Small Sided Football Company Ltd | Arts & recreation | 2020 |
| THE Small Sided Football Holdco Ltd | Arts & recreation | 2020 |
| THE Social Housing Programme CIC | Real estate | 2024 |
| THE Social Restaurant Limited | Hospitality | 2020 |
| THE Strowger Trust | Health & social care | 2012 |
| THE Swinton Hall (Swinton) Management Company Limited | Real estate | 2006 |
| THE Table Foundation Limited | Extraterritorial | 2025 |
| THE Table Management Company Limited | Financial services | 2025 |
| THE Tacover Ltd | Hospitality | 2024 |
| THE Tacover Tequila Festival Ltd | Hospitality | 2024 |
| THE Techno Studio Limited | Information & communication | 2020 |
| THE Terrace (Woodford Green) Limited | Households | 2005 |
| THE Thinking Frame Ltd | Health & social care | 2019 |
| THE Ticket Fairy Limited | Information & communication | 2011 |
| THE Toadstool Limited | Real estate | 2025 |
| THE Toning Ground Coaching Ltd | Education | 2018 |
| THE Toning Ground Franchise Ltd | Arts & recreation | 2024 |
| THE Two Jerks Limited | Wholesale & retail | 2026 |
| THE UK Society for Behaviour Analysis | Administrative & support | 2012 |
| THE Umbrella Community Network CIC | Education | 2025 |
| THE Village Bakers Limited | Wholesale & retail | 2003 |
| THE Vogue Stoke Newington Limited | Households | 2018 |
| THE Weavers' Tribe Ltd | Wholesale & retail | 2025 |
| THE Windermere Group Ltd | Construction | 2017 |
| THE Woodford Wells Club Ltd | Arts & recreation | 2024 |
| THE Woodford Wells Trading Company Ltd | Arts & recreation | 2024 |
| THE Work DR. Ltd | Education | 2020 |
| THE Write Network CIC | Arts & recreation | 2013 |
| THE YES Foundation Limited | Education | 2018 |
| Theauthenticircle Ltd | Information & communication | 2026 |
| Thekitchen Ltd | Administrative & support | 2012 |
| Thelondoneconomicnewspaper Limited | Information & communication | 2014 |
| Themirtis Limited | Wholesale & retail | 2011 |
| Therapy in Mind Limited | Health & social care | 2019 |
| Thermal Coverings Global Limited | Construction | 2017 |
| Thermal Coverings Limited | Construction | 1997 |
| Theron Investments Limited | Real estate | 2025 |
| Thesuburbanartist Limited | Arts & recreation | 2017 |
| Theydon Construction Security and Safety Ltd | Construction | 2025 |
| Theydon Construction Solutions Limited | Construction | 2025 |
| Theydon Consultancy Ltd | Professional & scientific | 2019 |
| Think of Space Limited | Construction | 2019 |
| Thira Consulting Ltd | Professional & scientific | 2025 |
| Thira Group Ltd | Financial services | 2025 |
| Thira Technology & Innovation Ltd | Information & communication | 2025 |
| Third Sector Accountants Ltd | Professional & scientific | 2026 |
| Thirsk Winton LLP | | 2009 |
| This CAN Happen Ltd | Professional & scientific | 2019 |
| This IS Icon Creative CIC | Arts & recreation | 2026 |
| This IS Icon Ltd | Other services | 2022 |
| THJ Consulting Ltd | Information & communication | 2018 |
| THM Building Services Ltd | Construction | 2014 |
| Thomas Stubbs Life & Style Ltd. | Administrative & support | 2008 |
| Thomas Worley Electrical Services Ltd | Construction | 2012 |
| Thornhill Homes Limited | Construction | 2017 |
| Threadwells Limited | Wholesale & retail | 2009 |
| Three Oaks Consultancy Limited | Information & communication | 2025 |
| Thrive Fitness Limited | Arts & recreation | 2010 |
| Thriveed Ltd | Education | 2025 |
| Thrivewell Limited | Other services | 2019 |
| Thymometrics Limited | Information & communication | 2012 |
| Ticking SMP Limited | Information & communication | 2015 |
| Tigersky Limited | Professional & scientific | 2008 |
| Tilbury Contracting Limited | Extraterritorial | 2009 |
| Tilex Properties Limited | Real estate | 2017 |
| Tilex Tech Limited | Information & communication | 2025 |
| TIM Plummer Trading Limited | Professional & scientific | 2017 |
| TIM Warren Setbuilding Limited | Construction | 2014 |
| TIM Westhead Ltd | Health & social care | 2011 |
| Time Based Arts Grading Limited | Administrative & support | 2015 |
| Time Based Arts Limited | Administrative & support | 2009 |
| TIN CUP Properties Ltd | Real estate | 2022 |
| Tincabell Music Limited | Information & communication | 1993 |
| Tiney Tots Tiney Home Ltd | Administrative & support | 2022 |
| Tiny Blue Limited | Professional & scientific | 1999 |
| TJ Build Dreams Limited | Construction | 2020 |
| TJ PT Limited | Other services | 2020 |
| TJ Roofing & Construction Ltd | Construction | 2025 |
| TK Select Ltd | Construction | 2025 |
| TKO Enterprise Ltd | Administrative & support | 2019 |
| TL Group Holdings Ltd | Wholesale & retail | 2026 |