| TAG (2019) Limited | Transport & logistics | 2019 |
| Tagc (Derby) Limited | Wholesale & retail | 2013 |
| Tahela Limited | Education | 2011 |
| TAI Phung Limited | Hospitality | 2010 |
| Tailored Babies Limited | Wholesale & retail | 2023 |
| Tailored for YOU Aesthetics Limited | Other services | 2025 |
| Tailored Interiors and Decor Limited | Construction | 2018 |
| Tails and Woofs Limited | Other services | 2025 |
| Taiwo Properties Ltd | Real estate | 2020 |
| TAJ Auto Parts Ltd | Wholesale & retail | 2022 |
| TAJ Media Ltd | Information & communication | 2024 |
| Tajaf Trading Company Ltd | Wholesale & retail | 2025 |
| Taj’S Kitchen Limited | Hospitality | 2026 |
| Takeoff WS Limited | Education | 2025 |
| Takf Property Ltd | Real estate | 2026 |
| Taking Care of YOU Limited | Wholesale & retail | 2007 |
| Tala Properties Ltd | Financial services | 2023 |
| Talb Group Limited | Financial services | 2021 |
| Talbot Farm Landscapes Limited | Construction | 1998 |
| Talbot Sports Turf Installation Limited | Administrative & support | 2010 |
| Talbot Turf Supplies Limited | Agriculture & fishing | 1998 |
| Talent Assembly Ltd | Administrative & support | 2026 |
| Talent Medical Services Ltd | Health & social care | 2026 |
| Talib Transport Limited | Transport & logistics | 2017 |
| Talk Limited | Financial services | 2005 |
| Talking 2 Limited - Speech and Language Therapy Limited | Education | 2019 |
| Tallow Limited | Financial services | 2026 |
| Talos Solutions Ltd | Real estate | 2025 |
| Talwar Services Ltd | Wholesale & retail | 2025 |
| TAM & LIU Company Limited | Wholesale & retail | 2024 |
| Tamannas Weddingevent and Catering Ltd | Hospitality | 2026 |
| Tamarind 42 Spices Ltd | Hospitality | 2026 |
| Tamarind Spice Spondon Ltd | Hospitality | 2023 |
| Tamatanga Restaurants Limited | Financial services | 2019 |
| Tamber & Brothers Ltd | Wholesale & retail | 2023 |
| Tamber Ltd | Wholesale & retail | 2020 |
| Tamber Records Ltd. | Professional & scientific | 2023 |
| Tamblyn Resourcing Limited | Financial services | 2012 |
| Tamwalt Limited | Real estate | 1977 |
| Tamworth Properties Limited | Construction | 1963 |
| TAN (Eco) Ltd | Agriculture & fishing | 2021 |
| Tan-Yah Ltd | Other services | 2012 |
| Tandem Performance Limited | Education | 2021 |
| Tang Developments Construction Limited | Construction | 2021 |
| Tang Developments Limited | Construction | 2019 |
| Tangier Estates Limited | Real estate | 2013 |
| Tango Communications Limited | Wholesale & retail | 2012 |
| Tania's New Bridge Inn Limited | Hospitality | 2017 |
| Tank Enterprises and Investments Limited | Real estate | 2016 |
| Tanning Cabin Ltd | Other services | 2024 |
| Tanyah Beauty Limited | Other services | 2023 |
| Tanyera UK Ltd | Wholesale & retail | 2022 |
| Tan’S Driving Academy Limited | Education | 2025 |
| TAO Investments Limited | Construction | 2010 |
| TAO Management Limited | Construction | 2018 |
| Tapit & Wrapit Scaffolding Company Limited | Construction | 2004 |
| Tapiworld Care Limited | Health & social care | 2022 |
| Taqdeer Sidhu Limited | Transport & logistics | 2026 |
| Tara Roadair Limited | Transport & logistics | 2002 |
| Taracj Ltd | Administrative & support | 2024 |
| Taralevents Ltd | Hospitality | 2025 |
| Tarb Limited | Construction | 2025 |
| Tarby Construction Limited | Construction | 2006 |
| Tarby Holdings Limited | Financial services | 2026 |
| Targabella Holdings Limited | Financial services | 2023 |
| Target Cars [Derby] Ltd | Wholesale & retail | 2019 |
| Target Vehicle Sourcing Limited | Wholesale & retail | 2015 |
| Target Work Wear Ltd | Wholesale & retail | 2022 |
| Tariro Properties Ltd | Real estate | 2023 |
| Tarka Blue Limited | Hospitality | 2025 |
| Tarmac Sportz Limited | Wholesale & retail | 2013 |
| Tarot DHE Energji Ltd | Wholesale & retail | 2024 |
| Tasdaq Flame Ltd | Hospitality | 2025 |
| Tasjh Ltd | Wholesale & retail | 2024 |
| Tasm Services Limited | Professional & scientific | 2025 |
| Tassara Property Investments Ltd | Real estate | 2023 |
| Tassara Property Management Ltd | Real estate | 2024 |
| Tasty Chicken Peartree Limited | Hospitality | 2024 |
| Tasty Fried Villa Ltd | Hospitality | 2026 |
| Tasty Restaurant UK Ltd | Hospitality | 2024 |
| Tasty Villa Ltd | Hospitality | 2023 |
| Tasty Yummy Derby Ltd | Hospitality | 2021 |
| Tasty Yummy Ltd | Hospitality | 2025 |
| Tasyeli Beauty Ltd | Health & social care | 2022 |
| Tata Box Ltd | Professional & scientific | 2019 |
| Tata Property Services Ltd | Real estate | 2026 |
| Tatarynowicz General Contractor Ltd | Construction | 2017 |
| Tatem Industrial Automation Limited | Manufacturing | 1997 |
| Tatem Limited | Professional & scientific | 2013 |
| Tatla Media Ltd | Manufacturing | 2020 |
| Tatonga Care Ltd | Health & social care | 2017 |
| Tattoo Shop Limited | Wholesale & retail | 2019 |
| Taudevin Engineering Limited | Construction | 2000 |
| Taurus Collections (UK) Ltd | Administrative & support | 2010 |
| Taurus Debtco Holdings (UK) Ltd | Financial services | 2023 |
| Tavern Tales Ltd | Hospitality | 2025 |
| Tawnom Property Ltd | Real estate | 2021 |
| Tax International Limited | Professional & scientific | 2022 |
| Tax Wizards Ltd | Professional & scientific | 2022 |
| Taxifella Ltd | Transport & logistics | 2026 |