| Thatcher + Hallam LLP | | 2010 |
| Thatcher and Hallam Limited | Professional & scientific | 2011 |
| THE Bath and Wells Diocesan Academies Trust | Education | 2012 |
| THE Bath Building Company Limited | Construction | 2022 |
| THE Bath Resin Company Ltd | Construction | 2022 |
| THE Bath School of Motoring and Lanhams Driving School Limited | Education | 2003 |
| THE Bike-It Company (Radstock) Limited | Wholesale & retail | 2012 |
| THE Butchers Arms Farmborough Ltd | Hospitality | 2026 |
| THE Cafe at Georges Garden Limited | Hospitality | 2024 |
| THE Campbell Collection Ltd | Wholesale & retail | 2018 |
| THE Cockpit Method Limited | Administrative & support | 2020 |
| THE Construction School Ltd | Education | 2024 |
| THE Cornish Honey Company Ltd | Wholesale & retail | 2020 |
| THE Dental Agency Ltd | Administrative & support | 2022 |
| THE Drawing Tool Company Limited | Professional & scientific | 2011 |
| THE Fabulous Lunch Company Ltd | Manufacturing | 2021 |
| THE Faulkland Inn Ltd | Hospitality | 2019 |
| THE FOX and Badger Co Limited | Hospitality | 2019 |
| THE Godhead Experience Ltd | Other services | 2021 |
| THE Granaries Oakhill Management Company Limited | Households | 2004 |
| THE Greek Grill (Somerset) Limited | Hospitality | 2018 |
| THE Green Shop MSN Limited | Wholesale & retail | 2009 |
| THE Hiding Place PUB Limited | Hospitality | 2018 |
| THE Horseless Bar Ltd | Hospitality | 2017 |
| THE Impact Navigator Ltd | Professional & scientific | 2024 |
| THE Lakeside Pool Limited | Arts & recreation | 2024 |
| THE Lighthouse Company (Mendip) Ltd | Professional & scientific | 2024 |
| THE Nest Games & Collectibles Ltd | Wholesale & retail | 2025 |
| THE Oakhill Bar Limited | Hospitality | 2026 |
| THE Old Boatstore Limited | Hospitality | 2012 |
| THE Orchard Bridal Co. Ltd | Wholesale & retail | 2025 |
| THE Partnership Trust | Education | 2011 |
| THE Peer Group People Limited | Professional & scientific | 2024 |
| THE Pet Place (Shepton) Ltd | Wholesale & retail | 2019 |
| THE Piggy PUB Ltd | Hospitality | 2020 |
| THE Pixel Crush Limited | Arts & recreation | 2015 |
| THE Plumbing & Heating Company (Bristol) Ltd | Construction | 2026 |
| THE Retreat Management Company (Foxcote) Limited | Households | 2005 |
| THE Sash Preservation Company Limited | Manufacturing | 2012 |
| THE Shambles Management Company (Radstock) Limited | Extraterritorial | 2024 |
| THE Siddings Management Company Limited | Households | 2009 |
| THE Silk Yard Ltd | Wholesale & retail | 2025 |
| THE Sleep Baby Coach Ltd | Extraterritorial | 2021 |
| THE Somerset & Dorset Joint Railway Company Limited | Arts & recreation | 2009 |
| THE Speaking Revolution Limited | Professional & scientific | 2021 |
| THE Square (Timsbury) Limited | Hospitality | 2023 |
| THE Super Sport Shed Limited | Wholesale & retail | 2021 |
| THE Tenancy Cleaning Company SW Ltd | Administrative & support | 2024 |
| THE Vehicle Hub Ltd | Wholesale & retail | 2024 |
| THE Wages Office Limited | Professional & scientific | 2010 |
| THE Whatley Workshop Ltd | Manufacturing | 2026 |
| THE Willberry Wonder Pony Trading Company Limited | Wholesale & retail | 2016 |
| THE Yoga Healing Foundation | Education | 2012 |
| Thickthorn Limited | Hospitality | 2007 |
| Thinkobox Limited | Transport & logistics | 2019 |
| This IS Where C.I.C. | Health & social care | 2025 |
| Thomson Car Sale Ltd | Wholesale & retail | 2025 |
| Thomsons Hardware Limited | Wholesale & retail | 2015 |
| Thoughtcrew Limited | Real estate | 2006 |
| Three Acres Construction Limited | Construction | 2012 |
| Three Nines Training Limited | Education | 2025 |
| Three Stones Property Ltd | Hospitality | 2018 |
| Tibbetts Transport Services Limited | Wholesale & retail | 2003 |
| Tickling Ivories Piano Shop Limited | Other services | 2019 |
| Tidy Consulting Ltd | Professional & scientific | 2018 |
| Tidyheidi Limited | Administrative & support | 2021 |
| Tiffin Time Ltd | Hospitality | 2014 |
| TIG Leasing Limited | Wholesale & retail | 1997 |
| Tiger Martial Arts Bath Ltd | Education | 2022 |
| Tiger Martial Arts Mendip Ltd | Education | 2022 |
| Tigris River Properties Ltd | Real estate | 2022 |
| TIH MSN Limited | Real estate | 2022 |
| TIM Brake Limited | Construction | 2010 |
| TIM Coles Limited | Information & communication | 2024 |
| Timber Decay Treatment Limited | Construction | 1967 |
| Timsbury Storage Ltd | Energy | 2020 |
| Tipcote House (Shepton Mallet) Management Company Limited | Households | 1992 |
| Tmetals Ltd | Professional & scientific | 2022 |
| Tmrm Limited | Administrative & support | 2002 |
| TOM Hull PT Ltd | Education | 2024 |
| Toms Taxis Limited | Transport & logistics | 2019 |
| Torac Audio Ltd | Manufacturing | 2026 |
| Tork Limited | Professional & scientific | 2000 |
| Totalstar Ltd | Manufacturing | 2026 |
| Totaltech IT Services Limited | Administrative & support | 2014 |
| Totel Building Services Limited | Energy | 2018 |
| Towtal Recall Ltd | Information & communication | 2026 |
| TPT SPI | Education | 2024 |
| Tractoncross Limited | Real estate | 1986 |
| Tractorland Limited | Wholesale & retail | 2002 |
| Trade Print Bath Ltd | Manufacturing | 2011 |
| Tradie Solutions Ltd | Wholesale & retail | 2026 |
| Traditional Yoga Limited | Wholesale & retail | 2014 |
| Traffic Services Limited | Professional & scientific | 2005 |
| Tree Aviation Limited | Manufacturing | 2007 |
| Trojan Driveways and Landscapes Limited | Administrative & support | 2025 |
| Trophies of Radstock Limited | Wholesale & retail | 2014 |
| Truck Logik Ltd | Manufacturing | 2019 |
| Trusted 247 Limited | Manufacturing | 2023 |
| TSG Haulage Ltd | Transport & logistics | 2019 |