| Taylor'D Interiors Ltd | Construction | 2013 |
| Taylor, Croft & Winder Ltd | Professional & scientific | 2002 |
| Taylor-Made Solutions Worldwide Ltd | Professional & scientific | 2016 |
| Taylormade Telecoms & Data Limited | Information & communication | 2005 |
| TB Day Care Limited | Agriculture & fishing | 2024 |
| TBA Services Limited | Professional & scientific | 2019 |
| TBH Distribution Ltd | Wholesale & retail | 2022 |
| TBP Accountants Ltd | Professional & scientific | 2025 |
| Tbpe Limited | Real estate | 2020 |
| TC Housing Limited | Real estate | 2020 |
| Tchin-Tchin Ltd | Hospitality | 2020 |
| TCJ Services Ltd | Administrative & support | 2024 |
| TCN Property Ltd | Construction | 2020 |
| TCS Company (Yorkshire) Ltd | Wholesale & retail | 2026 |
| TD Golf Ltd | Arts & recreation | 2020 |
| Tdcqyffsgs Limited | Wholesale & retail | 2025 |
| Tdduk Limited | Information & communication | 2025 |
| Tdgd Global Limited | Administrative & support | 2025 |
| Tdvw Limited | Hospitality | 2017 |
| Tea a Dark Ltd | Hospitality | 2025 |
| Teach Assist Recruitment Ltd | Administrative & support | 2023 |
| Teacher Assist Ltd | Administrative & support | 2015 |
| Teacher Assist Training CIC | Other services | 2021 |
| Teachers Benefit Agency Limited | Extraterritorial | 2001 |
| Teachers Retirement Agency Limited | Extraterritorial | 2000 |
| Teachers Retirement Seminars Ltd | Extraterritorial | 2008 |
| Team 17 Digital Limited | Information & communication | 1991 |
| Team Developments Limited | Real estate | 2001 |
| Tebbs Broadcast Services Ltd | Information & communication | 2021 |
| Tech Electrical Systems Ltd. | Construction | 2018 |
| Techbridge Innovation Ltd | Professional & scientific | 2023 |
| Techclad Ltd | Construction | 2022 |
| Techini Limited | Real estate | 2002 |
| Techmonkeys Limited | Information & communication | 2011 |
| Technoplas Ltd. | Manufacturing | 2013 |
| Technosoft Consulting Limited | Information & communication | 2020 |
| Teckoe Studios Ltd | Information & communication | 2022 |
| Tectum Concept Limited | Administrative & support | 2011 |
| Tees Healthcare Services Limited | Health & social care | 2020 |
| Teethgrinder Limited | Information & communication | 2002 |
| Tektape Ltd | Manufacturing | 2017 |
| Tekton Building Solutions Limited | Construction | 2022 |
| TEL Offshore Engineering Limited | Professional & scientific | 2009 |
| Telecom Solutions Limited | Information & communication | 2017 |
| Teleq Ltd | Professional & scientific | 2005 |
| Television & Broadband Consulting Ltd | Information & communication | 2013 |
| Temna Transport Ltd | Transport & logistics | 2025 |
| Temptedd Ltd | Wholesale & retail | 2025 |
| TEN Consultancy Ltd | Education | 2021 |
| TEN Equity Ltd | Real estate | 2024 |
| Tender Writing Hub Ltd Ltd | Administrative & support | 2025 |
| Terra VAC (UK) Limited | Water & waste | 2005 |
| Terror Towers Limited | Arts & recreation | 2002 |
| Tesla Health Group Ltd | Health & social care | 2020 |
| Tete TWD Ltd | Transport & logistics | 2020 |
| TEX Services Ltd | Other services | 2007 |
| Texlogistics Limited | Manufacturing | 2016 |
| TFP (Wakefield) Limited | Real estate | 2011 |
| Tftp Ltd | Wholesale & retail | 2017 |
| Tglnc Holdco Limited | Financial services | 2025 |
| Tglnc Limited | Manufacturing | 2025 |
| TGM Property Management Limited | Real estate | 2023 |
| TGS Synergies Ltd | Health & social care | 2023 |
| TH Property Investments Ltd | Real estate | 2019 |
| Th.E.A.M. Consult Limited | Wholesale & retail | 2014 |
| Thakur Medical Services Limited | Education | 2021 |
| Thameslink Logistics Ltd | Transport & logistics | 2025 |
| Tharandt & Tharandt Ltd. | Professional & scientific | 2013 |
| Thatsagoal Media Limited | Professional & scientific | 2012 |
| That’S SO Beauty Ltd | Wholesale & retail | 2025 |
| THE Actors' Post Ltd | Other services | 2017 |
| THE Advocacy Rose Ltd | Administrative & support | 2025 |
| THE Aesthetic Boutique Clinic Ltd | Wholesale & retail | 2019 |
| THE Agency (UK) Bridal Limited | Wholesale & retail | 2021 |
| THE Alfie Jack PUB Co Limited | Hospitality | 2020 |
| THE Alloy Wheel Hub Limited | Manufacturing | 2015 |
| THE Alright Group Ltd | Administrative & support | 2014 |
| THE Art Exchange CIC | Education | 2024 |
| THE Bahamas Locomotive Society Limited | Arts & recreation | 1969 |
| THE Bar at the Brig Ltd | Hospitality | 2011 |
| THE Barber House Wakefield Limited | Other services | 2022 |
| THE Beveridge Trading Company Ltd | Real estate | 2025 |
| THE Big Orchard Ltd | Manufacturing | 2013 |
| THE Botox Barn Limited | Health & social care | 2026 |
| THE Bride Room Ltd | Wholesale & retail | 2019 |
| THE Burkinabe Community Interest Company | Other services | 2025 |
| THE Butterfly Book Club Limited | Wholesale & retail | 2024 |
| THE Button Bunch Ltd | Wholesale & retail | 2018 |
| THE Cadman Housing Project Ltd | Health & social care | 1995 |
| THE Calls Coffee Company Ltd | Wholesale & retail | 2018 |
| THE Car Buyerz (North) Limited | Wholesale & retail | 2021 |
| THE Card Expo Ltd | Administrative & support | 2025 |
| THE Catering Events Consultancy Ltd | Hospitality | 2025 |
| THE Change Collective Centre Limited | Other services | 2022 |
| THE Changes Hair Salon Limited | Other services | 2016 |
| THE CJS Hub C.I.C. | Professional & scientific | 2025 |
| THE Cleaning Fairies Ltd | Administrative & support | 2024 |
| THE Clubhouse Crofton Limited | Health & social care | 2024 |
| THE Coast Lettings Company Ltd | Real estate | 2025 |
| THE Coffeestop @ the Junction Horbury Limited | Hospitality | 2020 |