| T.D. (UK) Limited | Wholesale & retail | 2002 |
| T.D.Welding Services Limited | Manufacturing | 2012 |
| T.Y Assets Ltd | Financial services | 2016 |
| T/A Cherry and White Hire. Glostools Ltd. | Administrative & support | 2014 |
| T2 Tiling Ltd | Construction | 2023 |
| T2Z Care Services Ltd | Health & social care | 2019 |
| T3C4 Limited | Construction | 2019 |
| T3G Services (Midlands) Limited | Real estate | 2012 |
| TA Autos (Gloucestershire) Limited | Wholesale & retail | 2024 |
| Taaj Trending Company Ltd | Wholesale & retail | 2026 |
| Tabb and Services Ltd | Wholesale & retail | 2024 |
| Tabb Cares Limited | Other services | 2024 |
| Tabb Innovations Ltd | Wholesale & retail | 2024 |
| Tabb Properties Ltd | Real estate | 2024 |
| Tactical Tails Ltd | Other services | 2025 |
| Tactitrade Ltd | Wholesale & retail | 2022 |
| Taffeta & Lace Limited | Wholesale & retail | 2023 |
| TAG Property Solutions (Tewkesbury) Limited | Extraterritorial | 2006 |
| TAG Residential Lettings Limited | Real estate | 2006 |
| Tail Tidy Limited | Other services | 2026 |
| Tailored Cleans Ltd | Administrative & support | 2024 |
| Take Five Healthcare Limited | Administrative & support | 2019 |
| Take Five Homecare Ltd | Health & social care | 2020 |
| Take Five Ltd | Administrative & support | 2023 |
| Take Five Recruitment Ltd | Administrative & support | 2023 |
| TALENTSCORE360 Ltd | Information & communication | 2026 |
| Tall Ships Court Management Company Limited | Households | 2019 |
| Tall Tree Services Limited | Agriculture & fishing | 2024 |
| Taller Estates Ltd | Real estate | 2025 |
| Tallon Carpentry and Building Limited | Construction | 2026 |
| Tallyscape Projects Ltd | Construction | 2023 |
| Tamburins Ltd | Wholesale & retail | 2025 |
| Tamga MMA Academy Ltd | Education | 2025 |
| Tamim Sells Limited | Wholesale & retail | 2025 |
| Tamj Limited | Health & social care | 2019 |
| TAN 1 Ltd | Financial services | 2021 |
| TAN 88 Ltd | Financial services | 2022 |
| Tanbrook Trading Company | | 1997 |
| Tando Homes Limited | Real estate | 2014 |
| Tando Property Services Limited | Real estate | 2010 |
| Tandoor Restaurant Ltd | Hospitality | 2012 |
| Tanga Services Ltd | Health & social care | 2020 |
| Tanners Close Flats 1990 Limited | Households | 1990 |
| Tanwel Ltd | Construction | 2016 |
| Tanzania Getaway Limited | Administrative & support | 2022 |
| Taper Fade Ltd | Wholesale & retail | 2025 |
| Tara Construction (Gloucester) Limited | Construction | 2003 |
| Target Catering Group Ltd | Manufacturing | 2004 |
| Target Catering Limited | Hospitality | 2003 |
| Target Consulting Services Limited | Information & communication | 2015 |
| Tarium Ltd | Professional & scientific | 2024 |
| Tartaglia's of Gloucester Ltd | Manufacturing | 1983 |
| Tasa Care Limited | Health & social care | 2023 |
| Tasca Consulting Limited | Financial services | 2007 |
| Taskmasters.Io Ltd | Construction | 2025 |
| Taste of Chicken Ltd | Hospitality | 2026 |
| Taste of Frango Ltd | Hospitality | 2025 |
| Tataro Limited | Wholesale & retail | 2024 |
| Tatiana Reed Ltd | Information & communication | 2024 |
| Taurix Limited | Information & communication | 2025 |
| Tavia Property Hub Ltd | Real estate | 2020 |
| Tawonga Ltd | Real estate | 2024 |
| Taxbase Accounting Limited | Professional & scientific | 2025 |
| Taybernetix Ltd | Information & communication | 2010 |
| Taylor Davis Group Ltd | Administrative & support | 2020 |
| Taylor Made Recruitment Ltd | Administrative & support | 2019 |
| Tayntons (LS) Limited | Professional & scientific | 2006 |
| Tayntons LLP | | 2005 |
| TB Accountancy & Bookkeeping Limited | Professional & scientific | 2023 |
| TBD Legal Limited | Professional & scientific | 2007 |
| Tbone Limited | Real estate | 2023 |
| TBS Engineering Limited | Manufacturing | 1989 |
| TBS Southwest Ltd | Wholesale & retail | 2006 |
| TBV Care Ltd | Health & social care | 2019 |
| TC Country & Equestrian Ltd | Wholesale & retail | 2026 |
| Tccb Ltd | Real estate | 2025 |
| Tcee Supplies Ltd | Manufacturing | 2024 |
| TCG Trade Events UK Ltd | Administrative & support | 2024 |
| TCL Automotive Limited | Wholesale & retail | 2021 |
| TCL Commercial Parts Limited | Wholesale & retail | 2024 |
| Tclb Ltd | Information & communication | 2022 |
| TD Scaffolding Limited | Construction | 2019 |
| Teacher's SPL Limited | Professional & scientific | 2022 |
| Team 4 Marketing Limited | Professional & scientific | 2004 |
| Team Capital Ltd | Administrative & support | 2002 |
| TEAM2RACING Ltd | Wholesale & retail | 2025 |
| TEAM4CLEAN Ltd | Administrative & support | 2025 |
| Teamwork Selection Limited | Administrative & support | 1998 |
| Tease Hair and Beauty Ltd | Other services | 2023 |
| Tecbuildr Ltd | Information & communication | 2024 |
| Tech Datacentre Limited | Information & communication | 2014 |
| Tech Talent Hunters Ltd | Administrative & support | 2023 |
| Techmyneni Solutions Limited | Information & communication | 2016 |
| Technuity Limited | Wholesale & retail | 2017 |
| Techsmart Trading Limited | Wholesale & retail | 2005 |
| Techspec Marketing Limited | Professional & scientific | 2017 |
| Techverse IT Solutions Limited | Information & communication | 2024 |
| Techy Shop Ltd | Wholesale & retail | 2024 |
| Teckels Animal Sanctuaries | Professional & scientific | 2004 |
| Teckels Boarding Kennels Limited | Other services | 2004 |