| Tahsin Siddiki Ltd | Wholesale & retail | 2025 |
| Tahta Kebab Ltd | Hospitality | 2023 |
| Taifem Limited | Other services | 1998 |
| Tailored Services Limited | Administrative & support | 2003 |
| Takeaway Voucher Ltd | Administrative & support | 2020 |
| Takeur Ltd | Wholesale & retail | 2026 |
| Takkas Property Investments Limited | Real estate | 2024 |
| Takoyaki Limited | Hospitality | 2021 |
| Takumi Lifts Ltd | Manufacturing | 2026 |
| Talco Properties Limited | Real estate | 2003 |
| Talksaferdating.Com Limited | Other services | 2002 |
| Talon Sterling Ltd | Real estate | 2026 |
| Talvania Global Ltd | Wholesale & retail | 2025 |
| Tamal Expert Assessors Limited | Real estate | 2016 |
| Tamanala Technology Solutions Ltd | Information & communication | 2014 |
| Tamanzi Limited | Hospitality | 2024 |
| Tangent International Group Ltd | Professional & scientific | 1987 |
| Tangent International Limited | Administrative & support | 1981 |
| Tangent Resourcing Limited | Wholesale & retail | 1998 |
| Tantim Solutions Ltd | Information & communication | 2007 |
| Tanure Consulting Limited | Health & social care | 2025 |
| Tanz 'N' Hair Ltd | Other services | 2015 |
| Tapflo International Limited | Professional & scientific | 2004 |
| Tared Ltd | Information & communication | 2025 |
| Targetcity Residents Management Limited | | 1988 |
| Targetplace Limited | Construction | 2001 |
| Tartan P.J.'s Limited | Construction | 2004 |
| Tashat Ltd | Wholesale & retail | 2026 |
| Taskforce Corporation EC Limited | Wholesale & retail | 1997 |
| Tasteco Limited | Hospitality | 2005 |
| Tate Joinery Limited | Construction | 2003 |
| Tavistock Springs Limited | Manufacturing | 1958 |
| Tawasul Tech Ltd | Information & communication | 2025 |
| Tax Day Limited | Other services | 2012 |
| Tax Doctor Investment Limited | Professional & scientific | 1996 |
| Tax Refund Professionals Limited | Professional & scientific | 2014 |
| Taxday (UK) Limited | Professional & scientific | 2014 |
| Taxday Services Limited | Professional & scientific | 2018 |
| Taxinform Limited | Professional & scientific | 2002 |
| Taylorgoob Limited | Professional & scientific | 2003 |
| Tbabs Health Cara Limited | Health & social care | 2022 |
| TBE Designworks Limited | Professional & scientific | 2018 |
| Tbeutyltd Limited | Other services | 2019 |
| TC Fixings Limited | Wholesale & retail | 2007 |
| TC North Essex Limited | Professional & scientific | 2002 |
| TC Security Solutions Ltd | Administrative & support | 2018 |
| TDB Sales Ltd | Administrative & support | 2020 |
| Teak Limited | Manufacturing | 1996 |
| Team Aitken Limited | Real estate | 2023 |
| Tech Guys ( UK ) Ltd | Wholesale & retail | 2019 |
| Tech N Byte Ltd | Information & communication | 2022 |
| Tech Otlet Company Limited | Mining & quarrying | 2022 |
| Tech Tycoon Ltd | Wholesale & retail | 2024 |
| Techanduse Ltd | Wholesale & retail | 2026 |
| Techdrive Limited | Information & communication | 2025 |
| Techionik Ltd | Information & communication | 2025 |
| Technautic Marine Windows Ltd. | Extraterritorial | 1996 |
| Technical Support Overseas Limited | Wholesale & retail | 2001 |
| Technischer Offset Sales Limited | | 1982 |
| Techno Infosys Ltd | Information & communication | 2017 |
| Technology ZOO Limited | Other services | 2003 |
| Techricity Ltd | Information & communication | 2025 |
| Techsearch Ltd | Administrative & support | 2023 |
| Techstreet Limited | Other services | 2019 |
| Teda Consulting Limited | Mining & quarrying | 2003 |
| Teecom Trading Ltd | Wholesale & retail | 2026 |
| Teekash Investments Limited | Real estate | 2023 |
| Teen Kanya Enterprise Ltd | Real estate | 2022 |
| Teer Mouldings Limited | Manufacturing | 1996 |
| TEK Enterprises Ltd | Real estate | 2026 |
| Tekblue Ltd | Wholesale & retail | 2021 |
| Tekktalk Limited | Administrative & support | 2006 |
| Teland Limited | Arts & recreation | 1982 |
| Telde Limited | Transport & logistics | 2005 |
| Teledyne UK Limited | Manufacturing | 1947 |
| Telematics UK Solutions Limited | Administrative & support | 2004 |
| Temple Fields 526 Limited | Professional & scientific | 2026 |
| Templesprings Childcare Services Ltd | Health & social care | 2018 |
| Temsmith Company Limited | Other services | 1999 |
| TEN Consulting Ltd | Professional & scientific | 2025 |
| TEN21 Group Ltd | Wholesale & retail | 2021 |
| Tendring Farms Limited | Agriculture & fishing | 2002 |
| Tendring Mental Health Support | Health & social care | 1992 |
| Tendring Pacific EOT Limited | Professional & scientific | 2025 |
| Tendring Pacific Limited | Wholesale & retail | 1996 |
| Tendsign Limited | | 1988 |
| Tenenzo Groups Ltd | Health & social care | 2019 |
| Tennis Centres Limited | Arts & recreation | 2006 |
| Tennisys Ltd | Wholesale & retail | 2013 |
| Tentrove Limited | Wholesale & retail | 2025 |
| Tepadr Ltd | Wholesale & retail | 2026 |
| Terence Building and Restoration Limited | Construction | 2020 |
| Termfresh Limited | Professional & scientific | 1988 |
| Terms of Art Limited | Education | 2000 |
| Terrainpk Ltd | Real estate | 2021 |
| Terrence Jack Consultants Limited | Information & communication | 1994 |
| Terry Holt Carpets Limited | Construction | 2002 |
| Terry Stores Limited | Wholesale & retail | 2005 |
| Tetteh Ltd | Information & communication | 2019 |
| Textestate Limited | Administrative & support | 2025 |