| Taygete Limited | Professional & scientific | 2010 |
| Taylor Developments (London) Limited | Construction | 2022 |
| Taylor Group Gloucester Limited | Hospitality | 2025 |
| Taylor Tennant Limited | Real estate | 2014 |
| Taylored Consultancy Services Limited | Professional & scientific | 2020 |
| Taylors of Cheltenham Ltd | Construction | 2017 |
| TAZ Phones Ltd | Wholesale & retail | 2026 |
| Tbbf Group Limited | Administrative & support | 2025 |
| TBC Theatrical Productions Ltd | Arts & recreation | 2024 |
| Tbjp Gym Ltd | Arts & recreation | 2023 |
| TBM Business Services Limited | Information & communication | 2018 |
| TBN Mark 1 Limited | Information & communication | 2026 |
| TBP Development Ltd | Construction | 2016 |
| TC Filters Limited | Manufacturing | 2013 |
| TCB Mark 1 Ltd | Financial services | 2026 |
| TCD Decorators Ltd | Administrative & support | 2017 |
| TCI Consultants Ltd | Extraterritorial | 2016 |
| TDH Build Ltd | Construction | 2015 |
| Tdmi Creatives Limited | Professional & scientific | 2020 |
| Teague Trading Ltd | Information & communication | 2011 |
| Teak and Grain Limited | Construction | 2025 |
| Teal Products Holdings Limited | Financial services | 2025 |
| Team Enterprises Ltd | Education | 2025 |
| Team LB Consulting Limited | Information & communication | 2022 |
| Team LB Limited | Information & communication | 2021 |
| Team LB Properties Limited | Real estate | 2023 |
| Team Lissington Ltd | Arts & recreation | 2026 |
| Tebbit Mews Management Co Limited | Real estate | 2019 |
| TEC Business Group Limited | Information & communication | 2018 |
| Tecburo at Ltd | Professional & scientific | 2019 |
| Tech OP Solutions Limited | Wholesale & retail | 1983 |
| Tech Perspectives Limited | Professional & scientific | 2017 |
| Tech-Hut Limited | Information & communication | 2019 |
| TECHENG42 Ltd | Professional & scientific | 2018 |
| Techfulfill Ltd | Wholesale & retail | 2025 |
| Techmo Solutions Ltd | Administrative & support | 2017 |
| Technical Separations Ltd | Professional & scientific | 2003 |
| Technology Enabled Trading Alliance Ltd | Wholesale & retail | 2024 |
| Technology Goat Limited | Information & communication | 2016 |
| Techrina Ltd | Wholesale & retail | 2020 |
| Techtonic IT Solutions Ltd | Information & communication | 2014 |
| Teej Group Limited | Financial services | 2018 |
| Tehg Holdings Ltd | Financial services | 2024 |
| Tekkfitt Limited | Arts & recreation | 2022 |
| Telco 1 Ltd | Information & communication | 2012 |
| Telcoeye Ltd | Information & communication | 2026 |
| Telcoms Limited | Information & communication | 2002 |
| Telford & Wrekin Services Limited | Water & waste | 2000 |
| Telling Property Ltd | Real estate | 2020 |
| Tellme Testing Limited | Information & communication | 2011 |
| Tellus Theatre Company Limited | Arts & recreation | 2024 |
| Telos Studios Ltd | Information & communication | 2024 |
| Teltech (Extrusion Tooling Consultants) Limited | Professional & scientific | 2009 |
| Temasec Advisory Limited | Information & communication | 2026 |
| Templars Weddings Limited | Other services | 2017 |
| Temple Guiting Estate Limited | Real estate | 2024 |
| Temple Installations Ltd | Construction | 2022 |
| Temple Roofing Ltd | Construction | 2023 |
| Templeton Law Limited | Professional & scientific | 2026 |
| Tempus Financial Planning Limited | Financial services | 2016 |
| TEN Management Ltd | Real estate | 2019 |
| TEN Storey Property Limited | Real estate | 2016 |
| Tengu Civil Engineering Ltd | Construction | 2026 |
| Tennyson 68 Limited | Hospitality | 2023 |
| Tenon Joinery Limited | Construction | 2005 |
| Tenzing Search Limited | Administrative & support | 2023 |
| Terence Stone(Developments)Limited | Construction | 1962 |
| Terhill House Management Company Limited | Households | 2022 |
| Terius Ltd | Information & communication | 2022 |
| Terminal Monkey Ltd | Information & communication | 2024 |
| Termonn Limited | Real estate | 2024 |
| Ternion Capital Limited | Other services | 2014 |
| Terra Libra Limited | Administrative & support | 2021 |
| Terracast Limited | Manufacturing | 2007 |
| Terrano Holdings Limited | Real estate | 1988 |
| Terrano Ltd | Real estate | 2024 |
| Terranova International Limited | Professional & scientific | 2003 |
| Terraregen UK Limited | Financial services | 2022 |
| Terrasec Consultancy Ltd | Administrative & support | 2025 |
| Terron Engineering Limited | Information & communication | 2013 |
| Terzetto Group Limited | Information & communication | 2023 |
| Test FLY Limited | Information & communication | 2012 |
| Tethered Wits Ltd | Arts & recreation | 2022 |
| Tewkesbury Nature Reserve Limited | Education | 2011 |
| Tewkesbury SAW Company Limited | Wholesale & retail | 1974 |
| Tewkesbury Van Sales Limited | Wholesale & retail | 2026 |
| TEWKS27 Ltd | Construction | 2023 |
| TFO Limited | Professional & scientific | 2025 |
| Tfro Services Limited | Education | 2025 |
| TG Assets Limited | Administrative & support | 2025 |
| TG Waste & Sewerage Limited | Water & waste | 2020 |
| TGC Consult Limited | Administrative & support | 2014 |
| TGG Property Ltd | Construction | 2025 |
| TGS Cheltenham Ltd | Manufacturing | 2019 |
| TH3 Sun CIC | Hospitality | 2020 |
| Thai Holistic International Ltd | Health & social care | 2023 |
| Thai Spa Limited | Other services | 2024 |
| Thai Tonic Massage Limited | Other services | 2024 |
| Thalarctos Limited | Professional & scientific | 2016 |
| Thankam Ltd | Real estate | 2023 |