| TL2 Training Limited | Education | 2018 |
| TLC Payroll Services Ltd | Professional & scientific | 2010 |
| TLC Wines GL53 Ltd | Wholesale & retail | 2020 |
| Tlimms Ltd | Construction | 2015 |
| TLM Marketing Ltd | Professional & scientific | 2023 |
| TLV Euro Engineering UK Limited | Administrative & support | 1998 |
| TM Hairdressing Limited | Other services | 2020 |
| TMC Building & Roofing Ltd | Construction | 2013 |
| TMF Acquisitions One Limited | Financial services | 2025 |
| TMF Group Holdings Ltd | Financial services | 2025 |
| TMK Poultryheaven Ltd | Agriculture & fishing | 2025 |
| TMP Planning Ltd | Professional & scientific | 2016 |
| TMR Electrical Services Ltd | Construction | 2014 |
| TMS Cheltenham Ltd | Health & social care | 2025 |
| Tmwf | Professional & scientific | 2024 |
| TN GUY Limited | Real estate | 2024 |
| TN Nails 26 Ltd | Other services | 2023 |
| TNM Solutions Ltd | Transport & logistics | 2019 |
| Tnntech Ltd | Professional & scientific | 2025 |
| TNT Decorative Service Ltd | Construction | 2024 |
| Toby Anderson Consulting Ltd | Professional & scientific | 2022 |
| Toby Falconer Architects Limited | Professional & scientific | 2016 |
| Todays Business Women Helping Tomorrow Limited | Administrative & support | 2024 |
| Toddington Garden Centre Limited | Agriculture & fishing | 2019 |
| Toggletech Limited | Wholesale & retail | 2017 |
| TOI Marine Limited | Professional & scientific | 2023 |
| Tokaro Ltd | Professional & scientific | 2023 |
| Tokenmark Limited | Hospitality | 2002 |
| Tokyo Customs Limited | Wholesale & retail | 2019 |
| Tokyo Tattoo Ltd | Professional & scientific | 2012 |
| Tokyotattoo Studios Limited | Other services | 2015 |
| Tolgar Engineering Limited | Manufacturing | 1969 |
| Tolkien Investment Services Limited | Health & social care | 2004 |
| Tolldish ISG Solar Limited | Energy | 2022 |
| TOM Bingham Consultancy Limited | Professional & scientific | 2019 |
| TOM Croft Services Ltd | Manufacturing | 2024 |
| TOM Hindle Limited | Information & communication | 2025 |
| TOM Siddall Limited | Professional & scientific | 2017 |
| Tomandel Properties Ltd | Real estate | 2025 |
| Tombs Developments Limited | Construction | 2005 |
| Tommac Ltd | Professional & scientific | 2026 |
| Tomp Services Limited | Professional & scientific | 2018 |
| Tonkabi Limited | Information & communication | 2015 |
| Tony Church Projects Ltd | Information & communication | 2013 |
| Tony Hollick Furniture Ltd | Manufacturing | 2019 |
| TOO - Chez Limited | Information & communication | 2004 |
| Tools & Builders Traders Ltd | Wholesale & retail | 2025 |
| Toopluggy Ltd | Manufacturing | 2019 |
| Toor Superstore Cheltenham Ltd | Wholesale & retail | 2026 |
| Toots Day Nursery Holdings Limited | Financial services | 2023 |
| Toots Day Nursery Investments Limited | Financial services | 2023 |
| Toots Day Nursery Limited | Education | 2019 |
| Toots Day Nursery Opco Limited | Financial services | 2023 |
| Toots Mids Opco Limited | Financial services | 2024 |
| Toots North Opco Limited | Financial services | 2024 |
| Toots South Opco Limited | Financial services | 2024 |
| Toots Southwest Opco Limited | Financial services | 2025 |
| Top Cleaning 2024 Limited | Administrative & support | 2024 |
| Top Dental Limited | Health & social care | 2026 |
| Top Farm Leisure Limited | Arts & recreation | 2006 |
| Top Lifted Limited | Professional & scientific | 2021 |
| Top Tailoring Cheltenham Ltd | Manufacturing | 2024 |
| Topiary FHL (Cheltenham) LLP | | 2024 |
| Topiary FHL (Elmley) LLP | | 2024 |
| Topiary Investments Ltd | Professional & scientific | 2025 |
| Torchbearing Ltd | Professional & scientific | 2017 |
| Tord Consulting Ltd | Professional & scientific | 2018 |
| Torocam TV Limited | Professional & scientific | 2008 |
| Torque Management Limited | Wholesale & retail | 2011 |
| Torquepath Limited | Professional & scientific | 2003 |
| Tortuga Life Ltd | Information & communication | 2018 |
| Total Compliance Software Limited | Information & communication | 2011 |
| Total Development Solutions Limited | Wholesale & retail | 2006 |
| Total Holdings Limited | Information & communication | 2001 |
| Total IA Limited | Manufacturing | 2015 |
| Total IT Support Limited | Information & communication | 2018 |
| Total Limited | Information & communication | 2016 |
| Total Mortgage Network (Holdings) Ltd | Professional & scientific | 2002 |
| Total Network Convergence Ltd | Information & communication | 2001 |
| Total Network Scaffolding Ltd | Administrative & support | 2003 |
| Total Packaging Services Limited | Manufacturing | 2005 |
| Total Poster Limited | Manufacturing | 1999 |
| Total Telecommunications Limited | Professional & scientific | 2005 |
| Total Tyre Recovery & Recycling Limited | Water & waste | 2026 |
| Totalight (UK) Limited | Manufacturing | 2010 |
| Tote Properties Limited | Real estate | 2017 |
| Totonou Ltd | Hospitality | 2026 |
| Totr Limited | Health & social care | 2016 |
| Touch the Skies Ltd | Information & communication | 2021 |
| Touchstone Review Ltd. | Information & communication | 2018 |
| Tour & Explore Ltd | Extraterritorial | 2001 |
| Tournado Ltd | Information & communication | 2025 |
| Tower Construction (Cheltenham) Limited | Construction | 1991 |
| Tower Pharmacy Holdings Limited | Health & social care | 2007 |
| Tower Pharmacy Ltd. | Wholesale & retail | 1997 |
| Town & City Holdings (Cheltenham) Limited | Financial services | 2010 |
| Town and Country Driveways Ltd | Administrative & support | 2024 |
| Town House Face & Body Clinic Ltd | Health & social care | 2025 |
| Townease Limited | Real estate | 1983 |
| Townhouse Children's Publishing UK Ltd | Information & communication | 2025 |