| Thrive Trauma Informed Support Ltd | Health & social care | 2026 |
| Thuvaa & Co Ltd | Wholesale & retail | 2018 |
| Tiamee Limited | Wholesale & retail | 2012 |
| Tibberton Court Association Limited(The) | Real estate | 1986 |
| Tibberton Housing Association '68 Ltd. | Households | 2005 |
| Tick the Box Solutions Limited | Information & communication | 2003 |
| Tickety BOO Two Limited | Health & social care | 2025 |
| Tiffin Holdings Ltd | Financial services | 2025 |
| Tiger EV Charging Limited | Extraterritorial | 2025 |
| Tigershark Studios Ltd | Information & communication | 2023 |
| Tile & Bath Sense Ltd | Wholesale & retail | 2015 |
| Tile Sense Ltd | Wholesale & retail | 2009 |
| Tillott Ventures Limited | Real estate | 2021 |
| TIM 24 Limited | Real estate | 2024 |
| TIM Olding Heating & Plumbing Limited | Construction | 2009 |
| Timber Homes Limited | Construction | 2015 |
| Time for YOU (Cheltenham) Limited | Administrative & support | 2021 |
| Time for YOU (Gloucester) Limited | Administrative & support | 2012 |
| Time Traveller POV Ltd | Information & communication | 2025 |
| Time Zone Experts Ltd | Wholesale & retail | 2018 |
| Timecs Ltd | Transport & logistics | 2017 |
| Timelapse International Ltd | Professional & scientific | 2018 |
| Timelight Services Ltd | Manufacturing | 2004 |
| Timezones Curriculum Support Limited | Education | 2002 |
| Timm Group Ltd | Construction | 2019 |
| TIMM4 Ltd | Administrative & support | 2013 |
| Titan Performance Gyms Ltd | Other services | 2021 |
| Titan Performance Gyms UK Ltd | Other services | 2025 |
| Titan Powered Access Limited | Administrative & support | 2020 |
| Titan Syndicate Ltd | Financial services | 2024 |
| Titus Design Ltd | Information & communication | 2016 |
| Tive Fulfilment Ltd | Transport & logistics | 2022 |
| Tive Holdings Limited | Financial services | 2025 |
| Tivoli Mansions LLP | | 2012 |
| Tiwi Corkspray Limited | Construction | 2023 |
| Tizzie Productions Ltd | Information & communication | 2013 |
| TJ Nexus Limited | Real estate | 2025 |
| Tjeffrey Limited | Wholesale & retail | 2026 |
| TJH Contracts (East Anglia) Limited | Construction | 2014 |
| TJJ Technical Ltd | Administrative & support | 2018 |
| TJP Heating Contractors Ltd | Construction | 2016 |
| TK Refrigeration Limited | Other services | 2001 |
| Tkaykoncepts International Ltd | Wholesale & retail | 2024 |
| TKB Kitchen Installations Limited | Extraterritorial | 2007 |
| TKG Capital Limited | Professional & scientific | 2012 |
| TL Automotive Services Limited | Wholesale & retail | 2016 |
| TL Holdings Gloucester Ltd | Financial services | 2026 |
| Tlaj Limited | Transport & logistics | 2025 |
| TM Commercial Properties Limited | Real estate | 2019 |
| TMA Security Services Ltd | Administrative & support | 2019 |
| TMA Services Group Ltd | Financial services | 2022 |
| TMH Residential Property Ltd | Real estate | 2026 |
| Tmit Solutions Limited | Information & communication | 2025 |
| TMS Mentoring Ltd | Education | 2017 |
| TMS Protect Ltd | Administrative & support | 2023 |
| TNL Carpentry Ltd | Manufacturing | 2024 |
| TNS Electrical Ltd | Construction | 2008 |
| Tobe Services Limited | Education | 2022 |
| Tobias Carehome Limited | Health & social care | 2015 |
| Tobs Professionals Limited | Health & social care | 2013 |
| Toby Jaffa Limited | Households | 2008 |
| Tocdev Ltd | Information & communication | 2020 |
| Today's Building Solutions Limited | Real estate | 2010 |
| TOE to Heel Limited | Health & social care | 2003 |
| Together in Matson | Other services | 2005 |
| Tollymay Resourcing and Logistics Limited | Professional & scientific | 2021 |
| TOM Cars &Co Ltd | Manufacturing | 2024 |
| TOM Constable Residential Sales Ltd | Real estate | 2026 |
| TOM Faulkner Property Development & Maintenance Limited | Construction | 2017 |
| TOM Jude Ltd | Wholesale & retail | 2025 |
| Tomaal Tool Steel Ltd | Wholesale & retail | 2013 |
| Tomcat Special Needs Innovation Limited | Professional & scientific | 2001 |
| Tomkinson Management Limited | Households | 2014 |
| Tomorrow's Business Software Ltd | Information & communication | 2019 |
| Tony Brown Logistics Limited | Transport & logistics | 2013 |
| Tony Selway Auto Repairs Limited | Wholesale & retail | 2002 |
| Top Construction Group Ltd | Construction | 2022 |
| Top Marks Services (Gloucester) Limited | Administrative & support | 2014 |
| Top Nails Bristol Limited | Administrative & support | 2026 |
| Top Quality Food Point Limited | Hospitality | 2024 |
| Top Shop Express Limited | Wholesale & retail | 2006 |
| Top Tailor Ltd | Wholesale & retail | 2023 |
| Top Totoe (Glos) Limited | Other services | 2016 |
| Topaz Transport Ltd | Transport & logistics | 2022 |
| Topb Properties Limited | Real estate | 2014 |
| Topb Solutions Limited | Professional & scientific | 2015 |
| Topia Services Limited | Administrative & support | 2020 |
| Topline Roofing Ltd | Construction | 2023 |
| Topolys Limited | Hospitality | 2003 |
| Tortie & Cream Fibres Ltd | Arts & recreation | 2024 |
| Torus Developments Ltd | Construction | 2023 |
| Tosin's Care Limited | Health & social care | 2022 |
| Total Access Solutions (UK) Limited | Administrative & support | 2008 |
| Total Design & Build Limited | Construction | 2014 |
| Total Later Life Solutions Ltd | Professional & scientific | 2012 |
| Total Quality Solutions Limited | Construction | 1999 |
| Total Solutions ( Group U.K.) Ltd | Construction | 2017 |
| Total Solutions Southern Group Ltd | Construction | 2023 |
| Total Therapy KDM Ltd | Health & social care | 2023 |
| Totally Fresh Cleaning Ltd | Administrative & support | 2025 |