| Tekfor Global Holdings Limited | Financial services | 2017 |
| Tekink Ltd | Wholesale & retail | 2025 |
| Tekla Brothers Ltd | Transport & logistics | 2023 |
| Teknically Ltd | Information & communication | 2024 |
| Teksonic Limited | Wholesale & retail | 1983 |
| Tektōn Brickwork Limited | Construction | 2023 |
| Tekwi Ltd | Construction | 2023 |
| Tela Consulting Ltd | Public administration | 2023 |
| Telco Consulting Limited | Information & communication | 2014 |
| Tele-Cabs Limited | Transport & logistics | 2007 |
| Teleca Healthcare Ltd | Health & social care | 2025 |
| Telecom Consortium Limited | Information & communication | 2026 |
| Telecom Design and Consultancy Services Limited | Information & communication | 2022 |
| Telecoms Consortium Limited | Information & communication | 2002 |
| Teleology Limited | Professional & scientific | 1996 |
| Telephorce Ltd | Administrative & support | 2024 |
| Teleport IT Ltd | Information & communication | 2022 |
| Telescope Direct Marketing Ltd | Professional & scientific | 2012 |
| Telescope Doordrop Media Ltd | Extraterritorial | 2019 |
| Telescope Group Ltd | Manufacturing | 2018 |
| Telescope Motorsport Limited | Arts & recreation | 2014 |
| Telescope Studios Limited | Manufacturing | 2002 |
| Telewis Ltd | Arts & recreation | 2020 |
| Telicity Ltd | Professional & scientific | 2016 |
| Tell Studio Limited | Information & communication | 2020 |
| Tellbrook Limited | Professional & scientific | 2009 |
| Tellifly Technologies Limited | Information & communication | 2026 |
| Telnet International Limited | Information & communication | 2000 |
| Teltech Mobile Installations Limited | Wholesale & retail | 2019 |
| Telu Clinical Limited | Health & social care | 2025 |
| Tema Holdings (Worldwide) Limited | Administrative & support | 2011 |
| Tembi Software Solutions Limited | Information & communication | 1999 |
| Temesghen Limited | Transport & logistics | 2026 |
| Temh Consultancy Limited | Health & social care | 2024 |
| Temitope Healthcare Limited | Health & social care | 2020 |
| Temo Barbers Limited | Other services | 2026 |
| Tempello Ltd | Administrative & support | 2025 |
| Temperance Hall Management Company Limited | Real estate | 2007 |
| Temperance Tea Ltd. | Wholesale & retail | 2020 |
| Temperaturegenie IP Holdings Limited | Financial services | 2025 |
| Temperaturegenie Limited | Information & communication | 2025 |
| Tempered Ltd | Information & communication | 2023 |
| Tempest Bailey Limited | Real estate | 2005 |
| Tempest Mini Market Ltd | Wholesale & retail | 2022 |
| Tempest Mortgage Group Ltd | Financial services | 2025 |
| Tempest Properties & Lettings Ltd | Real estate | 2026 |
| Tempest Property Group Ltd | Real estate | 2025 |
| Templar Graphics Ltd | Professional & scientific | 2020 |
| Template Architects Limited | Professional & scientific | 2020 |
| Temple Building Services (Yorkshire) Limited | Construction | 2008 |
| Temple Cloud Solutions Ltd | Administrative & support | 2014 |
| Temple Electrical Leeds Ltd | Construction | 2025 |
| Temple Estates Limited | Real estate | 2021 |
| Temple Garden Chambers Limited | Other services | 2003 |
| Temple Newsam Golf Club Limited | Arts & recreation | 1998 |
| Temple Property Improvements Ltd | Administrative & support | 2024 |
| Temple Street Apartments Limited | Real estate | 2011 |
| Temple Way Properties Limited | Real estate | 1972 |
| Templegate Property and Investments Ltd | Real estate | 2023 |
| Templegate Tiny Tots | Education | 2010 |
| Templeoak Properties Limited | Real estate | 1998 |
| Templestowe Properties Limited | Real estate | 2020 |
| Tempo Asset Partners Ltd | Real estate | 2025 |
| Tempo Management Company Limited | Households | 2007 |
| Temporal Lennon & Company Limited | Professional & scientific | 2002 |
| Temporary Brand Consultancy Ltd | Information & communication | 2023 |
| Temporary Measures Ltd | Construction | 2026 |
| Temposync Limited | Information & communication | 2026 |
| Tempright Limited | Administrative & support | 2020 |
| TEN Eleven Club Ltd | Professional & scientific | 2025 |
| TEN Financial Capital Limited | Financial services | 2021 |
| TEN Financial Partners LLP | | 2021 |
| TEN TEN Stores Limited | Wholesale & retail | 2023 |
| Tenancy Cleaner Ltd | Administrative & support | 2025 |
| Tenant Agent Limited | Real estate | 2020 |
| Tenant Bridge UK Ltd | Hospitality | 2025 |
| Tendo Ltd | Professional & scientific | 2010 |
| Tenet Financial Services Limited | Financial services | 1994 |
| Tenet Mortgage Solutions Limited | Financial services | 2014 |
| Tenos Services Limited | Information & communication | 2016 |
| Tenshi Technologies Ltd | Wholesale & retail | 2023 |
| Tent Holdings Limited | Financial services | 2020 |
| Tenx Tools Ltd | Wholesale & retail | 2025 |
| Teracore Limited | Information & communication | 2025 |
| Teranoa Limited | Administrative & support | 2014 |
| Terebinth Properties Ltd | Real estate | 2024 |
| Teresia Limited | Health & social care | 2016 |
| Terisubi Limited | Information & communication | 2025 |
| Term Holdings Limited | Financial services | 2021 |
| Terminusitsolutions Ltd | Professional & scientific | 2015 |
| Termstall Limited | Construction | 1976 |
| Terra Loci Ltd | Professional & scientific | 2020 |
| Terrace Party Limited | Arts & recreation | 2019 |
| Terradom Ltd | Information & communication | 2022 |
| Terraguard Pest Control Ltd | Administrative & support | 2023 |
| Terran Empire Ltd | Financial services | 2023 |
| Terrella Group Ltd | Professional & scientific | 2019 |
| Terry Gilchrist: Rebellion Fitness Ltd | Arts & recreation | 2012 |
| Terry Medlam Transport Ltd | Transport & logistics | 2021 |
| Terry Milner Holdings Ltd. | Administrative & support | 2009 |