| Tactical Property Solutions Ltd | Real estate | 2024 |
| Tactix Group Ltd | Extraterritorial | 2026 |
| Tactone Technologies Ltd | Information & communication | 2026 |
| TAD Farms UK Ltd | Hospitality | 2025 |
| Taf.M Ltd | Wholesale & retail | 2023 |
| Tafadar Estates Ltd | Real estate | 2019 |
| Tagg Software Ltd | Information & communication | 2026 |
| Tagp Ltd | Health & social care | 2025 |
| Tags & Trends Distribution Ltd | Wholesale & retail | 2022 |
| Taharah Ltd | Wholesale & retail | 2026 |
| Tailor Made Timber Services Ltd | Manufacturing | 2021 |
| Tailored Blocks Ltd | Manufacturing | 2022 |
| Tailored for ME C.I.C. | Administrative & support | 2024 |
| Tailroad Labs Ltd | Information & communication | 2026 |
| Take the Word at ITS Word CIC | Information & communication | 2023 |
| Taking Positive Steps and Associates Ltd | Hospitality | 2013 |
| Tako Solutions Limited | Professional & scientific | 2025 |
| Talas Flow Ltd | Manufacturing | 2024 |
| Talbot Clarke Ltd | Information & communication | 2009 |
| Talent Media Group Limited | Professional & scientific | 2025 |
| Talent Network Partners Ltd | Administrative & support | 2023 |
| Talent Path Limited | Administrative & support | 2025 |
| Talent Recognition Limited | Information & communication | 2019 |
| Talents in Training Limited | Education | 2018 |
| Tales Ltd | Real estate | 2026 |
| Talisman CAB Service Ltd | Wholesale & retail | 2021 |
| Talk Gambling Limited | Information & communication | 2023 |
| Talking Peace CIC | Professional & scientific | 2025 |
| Tall Girls Co Ltd | Wholesale & retail | 2024 |
| Tall Spires Limited | Information & communication | 2012 |
| Tall Street Limited | Information & communication | 2015 |
| Tall Tree Translations Ltd | Professional & scientific | 2016 |
| Talleeo Ltd | Information & communication | 2026 |
| Talos Core Limited | Information & communication | 2026 |
| Talvesta Ltd | Administrative & support | 2025 |
| Talvika Ltd | Wholesale & retail | 2026 |
| TAM & Kenton Limited | Real estate | 2023 |
| Tamago Technology Ltd | Information & communication | 2026 |
| Tameem Ltd | Information & communication | 2025 |
| Tamoor&Yash Ltd. | Information & communication | 2019 |
| TAN Evolution Ltd | Wholesale & retail | 2025 |
| Tanamera Properties Ltd | Administrative & support | 2020 |
| Tanara Limited | Wholesale & retail | 2025 |
| Tangua Solutions Ltd | Information & communication | 2026 |
| Tapestry Inclusion and Psychology Services Ltd | Education | 2023 |
| Taqwah Ltd | Information & communication | 2025 |
| Tarka Worldwide Ltd | Arts & recreation | 2025 |
| Tarman Ltd | Wholesale & retail | 2021 |
| Tarn Consulting Ltd | Professional & scientific | 2014 |
| Tarotkin Ltd | Manufacturing | 2026 |
| Tartan Process Ltd | Wholesale & retail | 2012 |
| Tarynm Trade Ltd | Wholesale & retail | 2026 |
| Tarzender Limited | Information & communication | 2016 |
| Tasaru Ventures Ltd | Wholesale & retail | 2025 |
| Tasgadh 1 Ltd | Real estate | 2021 |
| Tasmeem Enterprise Limited | Real estate | 2017 |
| Taso Property Holdings Limited | Financial services | 2016 |
| Taso Property Limited | Real estate | 2016 |
| Taste Istanbul Ltd | Administrative & support | 2025 |
| Taste of East Anglia Community Interest Company | Other services | 2017 |
| Tastebudz Collective Ltd | Wholesale & retail | 2025 |
| Tate Apartments SLY Street Ltd | Real estate | 2010 |
| Tattoo Art Limited | Other services | 2001 |
| Tattoo Fashion Ltd | Wholesale & retail | 2025 |
| Taurus Investigation and Protection Services Ltd | Financial services | 2019 |
| Tavares Property Ltd | Construction | 2020 |
| Tavaresproperties Ltd | Real estate | 2025 |
| Tax Advisers Direct Limited | Professional & scientific | 2002 |
| Tax Smart Limited | Professional & scientific | 2023 |
| Tax Steps Ltd | Professional & scientific | 2021 |
| Taxbuzz Limited | Professional & scientific | 2020 |
| TAY Holdings Limited | Professional & scientific | 1996 |
| Tayfen Meadows Management Company Limited | Households | 2001 |
| Taygrave Ltd | Professional & scientific | 2019 |
| Taygre Limited | Manufacturing | 2023 |
| Taylor & Sons Developments Ltd | Real estate | 2024 |
| Taylor Moyana Venue Styling Limited | Hospitality | 2023 |
| Taylor Nest Investments Ltd | Households | 2025 |
| Taylor Your Best Life Ltd | Professional & scientific | 2021 |
| Taylor-Medleys Ltd | Real estate | 2016 |
| Tayside Utilities Ltd | Professional & scientific | 2018 |
| TAZ Aldeek Ltd | Information & communication | 2021 |
| TB Hospitality Solutions Ltd | Professional & scientific | 2025 |
| TB Mechanical Installation Ltd | Professional & scientific | 2026 |
| TB Proprietary Ltd | Real estate | 2018 |
| Tbdc Ltd | Wholesale & retail | 2011 |
| Tbtl Ltd | Real estate | 2020 |
| TBW Capital Ltd | Real estate | 2023 |
| TC - Service Solutions Ltd | Other services | 2024 |
| TC Cars & Commercial Limited | Wholesale & retail | 2022 |
| TC Cleaning Ltd | Administrative & support | 2019 |
| TC Services Group UK Ltd | Construction | 2026 |
| TCG Nomad Ltd | Wholesale & retail | 2025 |
| Tchoukball UK CIC | Arts & recreation | 2013 |
| TCM Ventures Ltd. | Information & communication | 2023 |
| TCO Associates Ltd | Construction | 2014 |
| TD Agri Limited | Agriculture & fishing | 2014 |
| TD Performance Ltd | Wholesale & retail | 2026 |
| TDC Group Ltd | Other services | 2026 |
| TDS Performance Ltd | Professional & scientific | 2018 |