| Tamesis Group Ltd | Households | 2018 |
| Tamim Properties Limited | Real estate | 2025 |
| Tamla AI Ltd | Information & communication | 2023 |
| Tamlams & Jays UK Limited | Wholesale & retail | 2021 |
| Tampopo Limited | Hospitality | 1996 |
| Tampopo Wimbledon Ltd | Hospitality | 2023 |
| Tampsiter Ltd | Wholesale & retail | 2019 |
| TAN Construction Services Limited | Construction | 2024 |
| TAN Envy Ltd | Other services | 2025 |
| TAN Here@Miami Sun Ltd | Other services | 2022 |
| Tangencia Ltd | Professional & scientific | 2024 |
| Tanhaus Ltd | Real estate | 2024 |
| Tanique Hair and Tanning Salon Ltd | Other services | 2024 |
| Tanning Lounge Limited | Other services | 2016 |
| Tanology NW Ltd | Other services | 2026 |
| Tanplexion Ltd | Other services | 2008 |
| Tansar Ltd | Real estate | 2020 |
| Tantini Ltd | Other services | 2023 |
| Tanzanite Wholesale Ltd | Wholesale & retail | 2024 |
| Tanzy's Properties Limited | Real estate | 2015 |
| TAO Digital Marketing Ltd | Professional & scientific | 2017 |
| Taotc Limited | Administrative & support | 2026 |
| TAP Advisory Limited | Professional & scientific | 2018 |
| TAP and Go Vending Ltd | Wholesale & retail | 2025 |
| TAP2BUILD Ltd | Construction | 2021 |
| Tapig Ltd | Information & communication | 2011 |
| Taqwa Ouds Ltd | Wholesale & retail | 2024 |
| Tarar Foods Ltd | Wholesale & retail | 2026 |
| Target Medical Solutions Ltd | Health & social care | 2012 |
| Target Physio Limited | Information & communication | 2023 |
| Tariff Select Ltd | Professional & scientific | 2023 |
| Tariq Mahmood Property’S Limited | Construction | 2021 |
| Tariq Trading Solutions Limited | Wholesale & retail | 2026 |
| Tarnish Limited | Financial services | 2025 |
| Tarragon Care Group Limited | Other services | 2023 |
| TAS & Nazia Investments Ltd | Real estate | 2024 |
| Taskers Food Limited | Hospitality | 2026 |
| Taslima Distribution Ltd | Wholesale & retail | 2026 |
| Tasneem Pharma Limited | Wholesale & retail | 2025 |
| Taste Bakery Limited | Manufacturing | 2012 |
| Taste Greece Limited | Hospitality | 2017 |
| Taste IT Ltd | Wholesale & retail | 2023 |
| Taste of Pakistan Ltd | Hospitality | 2022 |
| Tastiva Ltd | Hospitality | 2026 |
| Tasty Foods (NW) Limited | Hospitality | 2026 |
| Tasty Quality Foods Ltd | Manufacturing | 2020 |
| Tate Horizon Holdings Ltd | Financial services | 2025 |
| Tattoo Landscapes Ltd | Administrative & support | 2024 |
| Tattoos by Paul Owen Ltd | Administrative & support | 2017 |
| Taunton Homecare Services Limited | Health & social care | 2019 |
| Taurus Estates and Investments Ltd | Real estate | 2022 |
| Taurus Fitted Bedrooms (Bolton) Ltd | Financial services | 2018 |
| Taurus Fitted Bedrooms Limited | Manufacturing | 2003 |
| Taurus Management Limited | Professional & scientific | 2020 |
| Tautcraft Investments Ltd | Real estate | 2004 |
| Tautcraft Limited | Wholesale & retail | 1985 |
| Tavtise Profile Ltd | Arts & recreation | 2025 |
| TAW (NW) Limited | Wholesale & retail | 2019 |
| Tawakal Halal Meat & Poultry Ltd | Wholesale & retail | 2023 |
| Tawakkal Rental Ltd | Real estate | 2024 |
| Tawbee Ltd | Wholesale & retail | 2025 |
| Tawdmere Limited | Administrative & support | 2019 |
| Tax Shop Global Limited | Professional & scientific | 2022 |
| Tax-E Drive Accountancy Ltd | Professional & scientific | 2024 |
| Taxally Ltd | Professional & scientific | 2025 |
| Taxsnap Ltd | Information & communication | 2025 |
| Taxtune Accountants Ltd | Professional & scientific | 2024 |
| Taylor and Martin Design Limited | Professional & scientific | 2013 |
| Taylor and Taylor Financial Services Limited | Financial services | 2005 |
| Taylor Building Specialist Ltd | Construction | 2023 |
| Taylor Glazing Solutions Ltd | Other services | 2016 |
| Taylor Hodson Properties Limited | Real estate | 2023 |
| Taylor Made Aesthetics Bolton Limited | Other services | 2025 |
| Taylor Murphy Transport Limited | Transport & logistics | 2025 |
| Taylor Pallets Limited | Wholesale & retail | 2011 |
| Taylor Parker Services Ltd | Professional & scientific | 2020 |
| Taylor RAE Interiors Limited | Professional & scientific | 2014 |
| Taylor Scaffolding NW Limited | Construction | 2017 |
| Taylor Smith Ventilation Limited | Construction | 2026 |
| Taylor Thermal Solutions Limited | Energy | 2017 |
| Taylor Transformers Limited | Manufacturing | 1986 |
| Taylor's Event Group Ltd | Manufacturing | 2023 |
| Taylor's Theatre Academy & College CIC | Education | 2024 |
| Taylored Optics Ltd | Health & social care | 2024 |
| Taylormade Law Limited | Professional & scientific | 2021 |
| Taylors Fishmongers Ltd | Wholesale & retail | 2019 |
| Taylors of Cleveleys Limited | Wholesale & retail | 2003 |
| Taylorshouse Consulting Limited | Administrative & support | 2025 |
| Tayo Desserts Limited | Hospitality | 2024 |
| Taywood Hill Property Management Limited | Real estate | 1999 |
| Tayyab Limited | Real estate | 2008 |
| Tayyaba Latif Limited | Wholesale & retail | 2024 |
| TAZ Trading Limited | Wholesale & retail | 2020 |
| Tazaa UK Limited | Hospitality | 2014 |
| TB Roofing Ltd | Construction | 2022 |
| TB Specialist Security Training and Consultancy Ltd | Administrative & support | 2024 |
| Tbart Holdings Ltd | Real estate | 2020 |
| Tbart Ltd | Information & communication | 2016 |
| TBL Academy LMT Ltd | Other services | 2024 |
| Tblends Ltd | Wholesale & retail | 2016 |