| Tanvi Foods UK Limited | Manufacturing | 2026 |
| Tany's Closet Ltd | Wholesale & retail | 2026 |
| Tanzanite Digital Ltd | Information & communication | 2022 |
| TAO Arts One Ltd | Agriculture & fishing | 2024 |
| TAP & Cypher Limited | Hospitality | 2025 |
| TAP Xcel Ltd | Manufacturing | 2024 |
| Tapas Centro Limited | Hospitality | 2003 |
| Tapbeemedia Limited | Information & communication | 2017 |
| Tapeline Recordings Ltd | Information & communication | 2017 |
| Tapvue Limited | Information & communication | 2021 |
| Tara Health Solutions Ltd | Health & social care | 2026 |
| Tara London Ltd | Real estate | 2025 |
| Taravi Estates Ltd. | Real estate | 2013 |
| Taravi Freight and Logistics Limited | Transport & logistics | 2020 |
| Tardis Design Ltd | Wholesale & retail | 2024 |
| Target Info Solutions Ltd | Information & communication | 2017 |
| Target IT Global Solutions Ltd | Information & communication | 2014 |
| Target Maintenance GB Ltd | Construction | 2014 |
| Targetland Limited | Administrative & support | 2013 |
| Targle Ltd | Professional & scientific | 2025 |
| Tarmack Limited | Administrative & support | 2023 |
| Tartan Tower Property Ltd | Real estate | 2023 |
| Tarteela Limited | Education | 2025 |
| TAS Store Ltd | Wholesale & retail | 2026 |
| Tasa Real Estate Ltd | Real estate | 2026 |
| Taskpool International Ltd | Administrative & support | 2026 |
| Tastavan Ltd | Information & communication | 2026 |
| Taste HUT Ltd | Hospitality | 2024 |
| Taste of Kebabish Limited | Hospitality | 2026 |
| Taste Restaurants Limited | Professional & scientific | 2013 |
| Tasteamore Limited | Hospitality | 2025 |
| Tasteo Ltd | Information & communication | 2020 |
| Tastraders Limited | Wholesale & retail | 2015 |
| Tasty Ingredients Limited | Wholesale & retail | 2017 |
| Tate Design and Build Consultancy Limited | Manufacturing | 2019 |
| Tatham Consultancy Ltd | Information & communication | 2018 |
| Tatiana Steven Andrew (TSA) Limited | Professional & scientific | 2019 |
| Tatry Group Ltd | Administrative & support | 2017 |
| Tattam Signalling Ltd | Other services | 2014 |
| Tattenhoe Management Limited | Households | 2001 |
| Tattenhoe Painting & Decorating Ltd | Construction | 2018 |
| Tatu Construct Limited | Construction | 2019 |
| Tatu Properties Limited | Real estate | 2022 |
| TAU Corporation | | 2005 |
| TAU Energy Limited | Professional & scientific | 2015 |
| Taurus Fabrications (U.K.) Limited | Manufacturing | 2002 |
| Taurus Fencing Limited | Construction | 2018 |
| Taurus Finance Ltd | Financial services | 2025 |
| TAV Building Services Ltd | Construction | 2023 |
| Tavernlink Limited | Real estate | 2000 |
| Taviera Limited | Manufacturing | 2025 |
| Tavira International Holdings Limited | Wholesale & retail | 2026 |
| TAVOLO13 Ltd | Hospitality | 2020 |
| Tawakkul Traders Limited | Wholesale & retail | 2021 |
| Tawares Properties Limited | Real estate | 2020 |
| Tax Able Partners Ltd | Professional & scientific | 2013 |
| Tax Matters (Tring) Limited | Professional & scientific | 2016 |
| Taxeezy Limited | Professional & scientific | 2012 |
| Taxkis Limited | Information & communication | 2025 |
| Taxlytic Accountants Ltd | Professional & scientific | 2025 |
| Taxmatt Ltd | Professional & scientific | 2016 |
| Taxwriter Limited | Arts & recreation | 2002 |
| Taya Healthcare & Trading Ltd | Health & social care | 2024 |
| Tayez Homes Ltd | Real estate | 2024 |
| Tayhill Property Services Limited | Administrative & support | 2022 |
| Taylaw Limited | Professional & scientific | 2014 |
| Taylor & Co Consultancy Limited | Professional & scientific | 2015 |
| Taylor & Co Consulting Ltd | Professional & scientific | 2022 |
| Taylor & Co Holdings Ltd | Financial services | 2020 |
| Taylor & Co Property Consultants Limited | Real estate | 2011 |
| Taylor Bowie Ltd | Professional & scientific | 2012 |
| Taylor Kinship Limited | Education | 2024 |
| Taylor Land and Property Group Limited | Real estate | 2017 |
| Taylor Made (Home Counties) Ltd | Wholesale & retail | 2017 |
| Taylor Made (Woburn Sands) Ltd | Real estate | 2018 |
| Taylor Made Webs Limited | Information & communication | 2000 |
| Taylor Multimedia Ltd | Manufacturing | 2013 |
| Taylor Promotions Ltd | Wholesale & retail | 2020 |
| Taylor Walsh Property Consultants Limited | Real estate | 2014 |
| Taylor-Gifford Limited | Professional & scientific | 2019 |
| Taylord Tableware Hire Limited | Hospitality | 2022 |
| Taylormade Furniture (Midlands) Ltd | Manufacturing | 2017 |
| TAZ Leisure Ltd | Arts & recreation | 2018 |
| Tazor Ltd | Transport & logistics | 2015 |
| TB Rail Consultancy and Planning Ltd | Construction | 2023 |
| TB Recruitment Limited | Administrative & support | 2023 |
| TBI UK Limited | Administrative & support | 2020 |
| Tbx(Uk) Ltd | Wholesale & retail | 2020 |
| TC Estates Ltd | Real estate | 2026 |
| TC Kangbridge Ltd | Financial services | 2019 |
| TC Kitchens Limited | Construction | 2009 |
| Tcbc Limited | Manufacturing | 2018 |
| TCE Service & Maintenance Ltd | Information & communication | 2015 |
| TCG Arena Ltd | Wholesale & retail | 2025 |
| Tchambak Limited | Professional & scientific | 2005 |
| Tchc Services Limited | Extraterritorial | 2021 |
| Tcj's Technologies PVT Limited | Information & communication | 2019 |
| TCN Software & Consulting Limited | Information & communication | 2017 |
| TCS Hardware Ltd | Wholesale & retail | 2024 |
| TCU Haulage Ltd | Transport & logistics | 2021 |