| Thought Library Media Limited | Information & communication | 2016 |
| Three Peaks Legal Stationery Limited | Administrative & support | 2009 |
| Threee Mooons Ltd | Real estate | 2017 |
| Thyolo Land Ltd | Real estate | 2021 |
| TI Law Ltd | Professional & scientific | 2019 |
| Tibetan Monastery Services Limited | Information & communication | 1983 |
| Tichma Limited | Transport & logistics | 2018 |
| Tidal View Developments Limited | Construction | 2022 |
| Tigress Communications Limited | Professional & scientific | 2025 |
| Tigress Sport Limited | Transport & logistics | 2015 |
| Tiles & More WSM Limited | Construction | 2025 |
| Tilsley House Limited | Administrative & support | 2010 |
| TIM Ryan Limited | Transport & logistics | 2017 |
| Timberwork Buildings Limited | Administrative & support | 2015 |
| TIME2SHINE Weston Ltd | Transport & logistics | 2023 |
| Timeless Kitchen Company Limited | Construction | 2017 |
| Timwood Hire Ltd | Administrative & support | 2018 |
| Tint My Ride Weston Ltd | Wholesale & retail | 2019 |
| Tintreal Music Ltd | Information & communication | 2020 |
| Tiny Circus Club Ltd | Arts & recreation | 2025 |
| TIP Top Singing Waiters Ltd | Arts & recreation | 2017 |
| Titan ROC Ltd | Information & communication | 2015 |
| Tiyumba Limited | Health & social care | 2025 |
| TJ Fish Limited | Manufacturing | 2025 |
| TJ Services (South West) Ltd | Construction | 2022 |
| TJA Property Ltd | Administrative & support | 2024 |
| TJC Home Improvements Ltd | Construction | 2024 |
| TJE Property Group Ltd | Real estate | 2025 |
| TK Construction & Consultancy Ltd | Professional & scientific | 2026 |
| TLA WSM Ltd | Real estate | 2014 |
| TLC Badgworth Barns Ltd | Construction | 2026 |
| TLC Developments (SW) Ltd | Construction | 2021 |
| TLC Electrical Ltd | Construction | 2023 |
| TLC Holm Ltd | Construction | 2024 |
| TLC Lake View Ltd | Construction | 2023 |
| TLC Lettings Ltd | Real estate | 2022 |
| TLC Stepping Stones Limited | Construction | 2025 |
| TM Heating & Plumbing (SW) Limited | Construction | 2015 |
| TO ME to YOU Property Services Ltd | Administrative & support | 2025 |
| TOM Norman Properties Ltd | Real estate | 2022 |
| TOM Norman Rubbish & Waste Clearance Ltd | Water & waste | 2024 |
| TOM White Consulting Ltd | Professional & scientific | 2018 |
| Tompra Ltd | Transport & logistics | 2024 |
| Tonic Psychiatric Services Limited | Health & social care | 2017 |
| Tony Doyle Associates Limited | Professional & scientific | 2001 |
| Tony Sammon Educational Consultancy Limited | Education | 2021 |
| Toogoods Fitness Ltd | Arts & recreation | 2016 |
| Toogoods Transport Limited | Transport & logistics | 2024 |
| Toolboxx Limited | Other services | 2019 |
| Tooth Care Project Limited | Manufacturing | 2022 |
| Top Colour Ltd | Construction | 2025 |
| Top Glass Exterior Cleaning Ltd | Administrative & support | 2023 |
| Top Notch Hairdressing Limited | Other services | 2019 |
| Top Taste 1 Ltd | Hospitality | 2025 |
| Topcab Taxi's Ltd | Transport & logistics | 2020 |
| Topdog Logistics Limited | Administrative & support | 2017 |
| Tornado 89 Limited | Transport & logistics | 2021 |
| Total Maintenance Solutions Ltd | Construction | 2011 |
| Tourlife Limited | Arts & recreation | 2016 |
| Towens Group Ltd | Water & waste | 2019 |
| Tower Walk Management Company Limited | Real estate | 2019 |
| TPG (SW) Ltd | Wholesale & retail | 2025 |
| Tracies Treasure Trove Ltd | Wholesale & retail | 2017 |
| Track ME Tools Ltd | Information & communication | 2021 |
| TRACK21 Touring Limited | Arts & recreation | 2018 |
| Traderly Ltd | Information & communication | 2026 |
| Trafalgar Court (WSM) Management Company Limited | Households | 2006 |
| Traffio UK Ltd | Information & communication | 2021 |
| Trans Krak Ltd | Extraterritorial | 2014 |
| Transforit Ltd | Extraterritorial | 2015 |
| Transforming Sectors Ltd | Administrative & support | 2024 |
| Transport Done Ltd | Transport & logistics | 2024 |
| Transport Drive Ltd | Transport & logistics | 2026 |
| Transport R&S Ltd | Transport & logistics | 2018 |
| Transportmar Ltd | Transport & logistics | 2025 |
| TRANSPORTSAM1987 Limited | Transport & logistics | 2020 |
| Travel Beans Ltd | Information & communication | 2021 |
| Travel Beans Media Ltd | Professional & scientific | 2023 |
| Travelbillity Limited | Transport & logistics | 2003 |
| Treadmill Property Management Limited | Households | 1982 |
| Treats WSM Ltd | Hospitality | 2022 |
| Treedom Limited | Hospitality | 2018 |
| Trego House Management Company Limited | Households | 2016 |
| Tregonwell Court Residents Limited | Households | 2006 |
| Tresco Mansions Management Company Limited | Households | 1985 |
| Trethowan's Dairy Limited | Manufacturing | 2004 |
| Trevor Smith Carpet and Flooring Limited | Wholesale & retail | 2015 |
| Tricel (Weston) Limited | Manufacturing | 1999 |
| Tricel Water Limited | Manufacturing | 2000 |
| Trident Holdings (WSM) Ltd | Financial services | 2024 |
| Tridon Garage Ltd | Wholesale & retail | 2022 |
| Trig Consulting Limited | Professional & scientific | 1997 |
| Trigga Ltd | Wholesale & retail | 2021 |
| Trilec Limited | Information & communication | 2013 |
| Trinity Gate Bridgwater Management Company Number Two Limited | Households | 2007 |
| Trinity Mansions Management Company Limited | Real estate | 2009 |
| Tripple K Care Services Ltd | Health & social care | 2021 |
| Triskelion Networks Ltd | Information & communication | 2024 |
| Tristone Care Group Ltd | Health & social care | 2026 |
| Triton Developments Limited | Real estate | 2020 |