| Tally Technologies Limited | Manufacturing | 2016 |
| Talnin Limited | Wholesale & retail | 2025 |
| Talon Servicing Limited | Wholesale & retail | 2024 |
| Talukder Property Ltd | Real estate | 2022 |
| Tamassia Engineering Limited | Administrative & support | 2024 |
| Tamizhi Enterprises Ltd | Construction | 2025 |
| Tammy Handmade Limited | Wholesale & retail | 2024 |
| Tamnag Thai Limited | Extraterritorial | 2000 |
| Tamr Properties Limited | Real estate | 2024 |
| Tamriel Property Limited | Real estate | 2006 |
| Tams Property Limited | Real estate | 2023 |
| Tanalia Ltd | Manufacturing | 2023 |
| Tanci Brothers Limited | Administrative & support | 2023 |
| Tandex Ltd | Wholesale & retail | 2019 |
| Tandoori Nights (Poole) Ltd | Hospitality | 2013 |
| Tanglewood Farm and Research Limited | Agriculture & fishing | 2012 |
| Tanhab Limited | Wholesale & retail | 2025 |
| Tanto Piercing Limited | Manufacturing | 2022 |
| Tapper and Son(Poole)Limited | Other services | 1964 |
| TAPS4TAX Limited | Professional & scientific | 2010 |
| Tarabostes Capital Ltd | Information & communication | 2024 |
| Tarar Property 101 Limited | Real estate | 2026 |
| Tarar Property 102 Limited | Real estate | 2026 |
| Tarar Property Group Limited | Financial services | 2026 |
| Tarbell Center for AI Journalism Ltd | Information & communication | 2025 |
| Targa Automotive Ltd | Wholesale & retail | 2023 |
| Target Focus Achieve Limited | Professional & scientific | 2009 |
| Tarion Ltd | Professional & scientific | 2006 |
| Tarka Enterprises Ltd | Construction | 2011 |
| Tarlu Ltd | Transport & logistics | 2016 |
| Tarua Limited | Hospitality | 2025 |
| Tarvis Group Ltd | Professional & scientific | 2017 |
| Tase Group Ltd | Professional & scientific | 2025 |
| Task Building and Landscaping Services Ltd | Construction | 2024 |
| Tasneem Care Ltd. | Wholesale & retail | 2021 |
| Taste of Thai Catering Ltd | Hospitality | 2025 |
| Tasty Flames Ltd | Hospitality | 2025 |
| Tate & Co. Holdings Limited | Financial services | 2025 |
| Tate & Partners Limited | Financial services | 2021 |
| Tatnam Management Company Limited | Real estate | 2012 |
| Tatnam Road (Poole) Development Limited | Households | 2012 |
| Tatnam Spice Ltd | Hospitality | 2025 |
| Tattd Distribution Limited | Wholesale & retail | 2025 |
| Tattd Limited | Wholesale & retail | 2024 |
| Tatts Aero Ltd | Administrative & support | 2009 |
| Tatz Consulting Partners Ltd | Health & social care | 2024 |
| Tauer Ltd. | Wholesale & retail | 2023 |
| Tauri Emotum Ltd | Information & communication | 2020 |
| Taurrauts Ltd | Wholesale & retail | 2024 |
| Tavore Limited | Hospitality | 2014 |
| Tavtots by Tavishi Ltd | Wholesale & retail | 2023 |
| Taxi Flex Ltd | Transport & logistics | 2025 |
| Tayberry Services Limited | Administrative & support | 2016 |
| Tayfield Lodge RTM Company Ltd | Households | 2018 |
| Taylor Made Asset Management Limited | Real estate | 2024 |
| Taylor Made Cleans Ltd | Administrative & support | 2024 |
| Taylor Made Removals Limited | Transport & logistics | 2021 |
| Taylor Made Storage Limited | Transport & logistics | 2022 |
| Taylor Made Surfacing Ltd | Construction | 2023 |
| Taylor Property Group Ltd | Real estate | 2015 |
| Taylor Resilience Ltd | Professional & scientific | 2011 |
| Taymar Developments Ltd | Construction | 2025 |
| Taymar Precision Grinding Limited | Manufacturing | 1999 |
| Tayra Services Ltd | Health & social care | 2021 |
| TB Autos Ltd | Wholesale & retail | 2025 |
| TBK Fitness Group Ltd | Wholesale & retail | 2025 |
| TBM (South West) Ltd | Manufacturing | 2019 |
| TBO Holdings Ltd | Financial services | 2025 |
| TBR73 Freehold Ltd | Real estate | 2025 |
| TBT Associates Ltd | Information & communication | 2016 |
| TC Accounting Limited | Professional & scientific | 2015 |
| Tcabgifts Ltd | Wholesale & retail | 2025 |
| TCF Consultancy Ltd | Real estate | 2022 |
| Tcgcompare Ltd | Information & communication | 2025 |
| Tcgifts Ltd | Wholesale & retail | 2025 |
| TCH LDR Ltd | Administrative & support | 2023 |
| Tchp Fusion Ltd | Financial services | 2026 |
| TCI Administration Limited | Administrative & support | 1997 |
| TCI Cables Limited | Manufacturing | 2011 |
| TCI Construction Limited | Construction | 2001 |
| TCI Group Holdings Limited | Real estate | 2019 |
| TCI Group Investments Ltd | Real estate | 2003 |
| TCI Legal Limited | Professional & scientific | 2018 |
| TCI Ltd. | Real estate | 2008 |
| TCI Management Limited | Real estate | 1996 |
| Tcmv Solutions Limited | Real estate | 2010 |
| TCS Lifestyle & Events Limited | Other services | 2026 |
| Tcss Limited | Professional & scientific | 2008 |
| TCT24 Ltd | Transport & logistics | 2018 |
| TDH Management Services Ltd | Real estate | 2019 |
| Tdmdt Ltd | Administrative & support | 2022 |
| TDS Consultancy Ltd | Professional & scientific | 2007 |
| Teach ME Sign Ltd | Education | 2012 |
| Teach Poole | Education | 2015 |
| Teak Close Management (Branksome) Limited | Households | 2003 |
| Team Automotive Staffing Limited | Administrative & support | 2022 |
| Team Chop LLP | | 2015 |
| Team FS Limited | Arts & recreation | 2013 |
| Team LM Limited | Health & social care | 2024 |
| Team Menace Ltd | Administrative & support | 2023 |