| Tales From the Earth Ltd | Administrative & support | 2007 |
| Tales From the Playground Ltd | Arts & recreation | 2019 |
| Talkbird Limited | Hospitality | 2017 |
| Talking Plants Ltd | Other services | 2025 |
| Talking Point Limited | Professional & scientific | 1997 |
| Tall Spaghetti Limited | Education | 2005 |
| Talliswen House Management Company Limited | Households | 2002 |
| Tally HO Trailers Limited | Wholesale & retail | 2014 |
| Talo Properties Ltd | Real estate | 2019 |
| Taloma Ecology Ltd | Professional & scientific | 2022 |
| Talonarc Trading Ltd | Wholesale & retail | 2026 |
| TAM Hangers (UK) Management Ltd | Manufacturing | 2020 |
| TAM Hangers (UK) Reuse Ltd | Financial services | 2020 |
| TAM Hangers (UK) Trading Ltd | Manufacturing | 2020 |
| Tamacs Ltd | Professional & scientific | 2009 |
| Tamadon Ltd | Professional & scientific | 2015 |
| Taman Offlicence Ltd | Wholesale & retail | 2022 |
| Tamileela Arasiyalthurai UK Ltd | Other services | 2026 |
| Taming Twins Limited | Hospitality | 2022 |
| Tamir Spiegel Limited | Professional & scientific | 2009 |
| Tamit Properties Limited | Households | 2025 |
| Tamiv Motors Limited | Wholesale & retail | 2025 |
| Tamper Coffee Company Limited | Hospitality | 2013 |
| TAN Delta Systems (TDS) Limited | Manufacturing | 2026 |
| TAN Delta Systems PLC | Manufacturing | 2007 |
| TAN Yard S9 Ltd | Health & social care | 2026 |
| Tanaan Holdings Limited | Financial services | 2014 |
| Tanaka Properties Ltd | Real estate | 2023 |
| Tananan Limited | Hospitality | 2012 |
| Tandoori HUT Bar Ltd | Hospitality | 2019 |
| Tandoori HUT SM Limited | Hospitality | 2024 |
| Tandoorix Limited | Hospitality | 2026 |
| Tandrusti Ltd | Public administration | 2020 |
| Tang Yuan Limited | Wholesale & retail | 2019 |
| Tangent Properties (North) Limited | Other services | 1995 |
| Tango Delta Logistics Limited | Transport & logistics | 2025 |
| Tank Industrial Maintenance Limited | Water & waste | 2010 |
| Tankersley Park Golf Club Limited | Arts & recreation | 1982 |
| Tanmahson Ltd | Wholesale & retail | 2024 |
| Tanronnen Inn Limited | Hospitality | 2015 |
| Tansley-Ux Consultancy Limited | Information & communication | 2011 |
| Tantastic Woodhouse Limited | Other services | 2025 |
| Tantra Monks Media Ltd | Administrative & support | 2025 |
| Tany Haulage Ltd | Transport & logistics | 2026 |
| Tanzinere (SY) Ltd | Health & social care | 2025 |
| TAO Partnership Ltd | Real estate | 2022 |
| Taoflow Ltd | Wholesale & retail | 2025 |
| Taoraywang Fashions Limited | Manufacturing | 2014 |
| Taoxe Trade Limited | Wholesale & retail | 2025 |
| TAP Hause Ltd | Wholesale & retail | 2020 |
| Tapa Investments Ltd | Other services | 2024 |
| Tape Garden Media Ltd | Information & communication | 2025 |
| Tapedeck Platform Limited | Information & communication | 2023 |
| Tapestry Compliance EOT Limited | Extraterritorial | 2020 |
| Tapestry Compliance Ltd. | Professional & scientific | 2018 |
| Tapestry Insight Limited | Professional & scientific | 2012 |
| Tapia Edgeway Limited | Construction | 2023 |
| Taplin Computers S6 Ltd | Wholesale & retail | 2023 |
| Taplin Investment Ltd | Real estate | 2021 |
| Taps Healthcare Limited | Extraterritorial | 2022 |
| Taptap Systems Ltd | Information & communication | 2025 |
| Tapton Estates Properties Limited | Real estate | 2006 |
| Tapton Grove Services Ltd | Construction | 2025 |
| Tapton House Ltd | Construction | 2020 |
| Tapton House Spinney Management Limited | Real estate | 1972 |
| Tapton Lodge Management Company Limited | Households | 1991 |
| Tapton Mount Residents Limited | Households | 2003 |
| Tapton S10 Limited | Other services | 2023 |
| Taptongate Property Management Limited | Households | 2015 |
| Taptonholme | Health & social care | 1984 |
| Taptonville Head Management Limited | Households | 2008 |
| Tara Darby Photography Limited | Professional & scientific | 2006 |
| Taralion Media Ltd | Wholesale & retail | 2024 |
| Tarczynski Ltd | Manufacturing | 2024 |
| Tardelli Ltd | Hospitality | 2024 |
| Targeleon Ltd | Professional & scientific | 2024 |
| Target Marketing Agency Limited | Professional & scientific | 2021 |
| Target Medics Ltd | Administrative & support | 2023 |
| Tariro Yashe Ltd | Health & social care | 2014 |
| Tarka Music Limited | Information & communication | 2018 |
| Tarn House Key Ltd | Financial services | 2023 |
| Tarn Thai Restaurant Limited | Hospitality | 2023 |
| Tarnbuild Limited | Other services | 2023 |
| Tarrants Garage Ltd | Wholesale & retail | 2006 |
| Tarryn Bespoke Skincare London Ltd | Other services | 2019 |
| Tartan Stays Limited | Households | 2023 |
| TAS Tarot Ltd | Wholesale & retail | 2021 |
| Tasani Consulting Ltd | Professional & scientific | 2017 |
| Tasc Fire Air and Acoustic Sealing Ltd | Manufacturing | 2009 |
| Tash Properties Limited | Real estate | 2016 |
| Task Force Black II Limited | Professional & scientific | 2024 |
| Tasker Estates Ltd | Real estate | 2018 |
| Taskers UK Limited | Manufacturing | 1985 |
| Tasneem (SY) Limited | Hospitality | 2018 |
| Taste China 252 Limited | Hospitality | 2025 |
| Taste Makers CIC | Hospitality | 2026 |
| Taste of China S5 Limited | Hospitality | 2024 |
| Taste of Thailand Limited | Hospitality | 2025 |
| Tasteez Limited | Hospitality | 2025 |
| Tasties (TOL) Limited | Hospitality | 2026 |