| Tanlite Ltd | Other services | 2014 |
| Tans Pharm Ltd | Wholesale & retail | 2007 |
| Tanya Rich Limited | Arts & recreation | 2004 |
| Tape 13 Limited | Information & communication | 2007 |
| Tara Rasoi Limited | Extraterritorial | 2024 |
| Targa Business Consulting Ltd | Professional & scientific | 2005 |
| Targeted Medical Writing Solutions Limited | Professional & scientific | 2019 |
| Task Tribe VA Ltd | Administrative & support | 2025 |
| Taskalot Ltd | Professional & scientific | 2021 |
| Taste of the Caribbean Ltd | Hospitality | 2026 |
| Taste Traders Enterprises Limited | Wholesale & retail | 2017 |
| Tatham Consulting Limited | Professional & scientific | 2022 |
| Taurus Real Estate Limited | Construction | 2017 |
| Tax Doctor Limited | Extraterritorial | 1999 |
| Taxation Matters Ltd | Extraterritorial | 2006 |
| Taylor Nash Properties Limited | Real estate | 2018 |
| Taylor Renovations Limited | Construction | 2023 |
| Taylor's Removal Services Ltd | Transport & logistics | 2026 |
| Taylors of Bath Limited | Construction | 2018 |
| Taylor’S Boutique Cafe Ltd | Hospitality | 2019 |
| TBA Developments Ltd | Construction | 2023 |
| TBC Bath Ltd | Other services | 2021 |
| Tbks Architectural Ironmongery Ltd | Wholesale & retail | 1999 |
| Tbks Holdings (Bath) Ltd | Financial services | 2010 |
| TBS Consultancy Services Limited | Professional & scientific | 2022 |
| TC Promotions Ltd | Information & communication | 2021 |
| TCB Bath Ltd | Other services | 2020 |
| TCD (Pulteney) Limited | Construction | 2011 |
| TCG Collectable UK Ltd | Wholesale & retail | 2023 |
| Tconsult EOT Limited | Administrative & support | 2023 |
| Tcsc Medical Limited | Health & social care | 2022 |
| TD & GP Limited | Real estate | 2016 |
| TDC Healthcare Ltd | Health & social care | 2019 |
| TDK2 Limited | Wholesale & retail | 2021 |
| TDM Lettings Ltd | Real estate | 2020 |
| Tea Architects Ltd | Professional & scientific | 2024 |
| Tea for Two Limited | Hospitality | 2011 |
| Teachershiphub Limited | Education | 2020 |
| Teahouse Emporium Limited | Wholesale & retail | 2026 |
| Tealith Ltd | Hospitality | 2014 |
| Team Renovations Limited | Real estate | 2022 |
| Team Superschools Limited | Arts & recreation | 2008 |
| TEAM30003D Works Limited | Professional & scientific | 2021 |
| Teamldn Ltd | Arts & recreation | 2018 |
| Tech on TAP Ltd | Information & communication | 2024 |
| Tech-Supplies.Co.Uk Limited | Education | 2000 |
| TECH4GOOD South West CIC | Other services | 2024 |
| Technical Weighing Solutions Limited | Manufacturing | 2016 |
| Technology Commercial and Outsourcing Law Limited | Professional & scientific | 2009 |
| Teckel Medical Ltd | Health & social care | 2020 |
| Tecpro Limited | Administrative & support | 1973 |
| Teddlet Ltd | Administrative & support | 2022 |
| Tedlets Ltd | Real estate | 2020 |
| Teewell Limited | Real estate | 1998 |
| Tefcon Limited | Construction | 2012 |
| Tegetege Ltd | Wholesale & retail | 2026 |
| Tegetegeproperty Ltd | Real estate | 2025 |
| TEJ Hobbs Limited | Transport & logistics | 2008 |
| Tekton Bespoke Ltd | Manufacturing | 2026 |
| Telc Real Estate Ltd | Professional & scientific | 2005 |
| Telecomms GRP Ltd | Information & communication | 2016 |
| Television South West Limited | Administrative & support | 2007 |
| Telic Design Ltd | Professional & scientific | 2020 |
| Telluris Limited | Other services | 2025 |
| Telstar Green Limited | Professional & scientific | 2017 |
| Temple Beautiful Limited | Other services | 2024 |
| Temple Cloud Garage Limited | Wholesale & retail | 2017 |
| Tempo Escape Room Limited | Arts & recreation | 2021 |
| Temra of Bath Limited | Real estate | 1955 |
| Temsford Europe Limited | Financial services | 2014 |
| TEN Digit Ltd | Professional & scientific | 2012 |
| Tenant Town Ltd | Real estate | 2013 |
| Tenasta Ltd | Information & communication | 2020 |
| Tendarr Ltd | Professional & scientific | 2024 |
| Teng Chuang Properties Limited | Real estate | 2025 |
| Tennyson Lodge North Freehold Limited | Households | 1997 |
| Tennyson Lodge North Management Company Limited | Households | 1988 |
| Tenstram Limited | Real estate | 1989 |
| Tensys Consultants Limited | Professional & scientific | 2000 |
| Tensys Dynamics Limited | Professional & scientific | 2000 |
| Tensys Limited | Professional & scientific | 1989 |
| Terry & SON Limited | Wholesale & retail | 2006 |
| Test Pilot Services Ltd | Professional & scientific | 2023 |
| Teuron Limited | Real estate | 2024 |
| TF Daily Ltd | Arts & recreation | 2025 |
| TG Clayton Consultancy Limited | Professional & scientific | 2017 |
| TG Holdings Limited | Hospitality | 2019 |
| TGE Building Limited | Construction | 2015 |
| TGK Scientific Limited | Wholesale & retail | 2005 |
| Thai Express Bath Ltd | Hospitality | 2025 |
| Thai Thai Foods Ltd | Hospitality | 2021 |
| Thai Weir Limited | Hospitality | 2021 |
| Thailand WOK Limited | Hospitality | 2025 |
| Thailand Work YI Limited | Hospitality | 2026 |
| Thames Exchange Limited | Construction | 1996 |
| Thanolil Properties Limited | Real estate | 2025 |
| Tharaa Groups Ltd | Wholesale & retail | 2025 |
| That Matcha Ltd | Wholesale & retail | 2022 |
| That Media Thing Limited | Information & communication | 2014 |
| Thatisthebestsound Limited | Arts & recreation | 2020 |