| THE Stanley Partnership Limited | Professional & scientific | 2016 |
| THE Stellar Sleep School Ltd | Other services | 2026 |
| THE Stone Manor Management Company Limited | Households | 1993 |
| THE Stow Flower Shop Limited | Wholesale & retail | 2017 |
| THE Stronghold Collective Ltd | Other services | 2025 |
| THE Stronghold Fitness Limited | Other services | 2020 |
| THE Stronghold Personal Training Hub Ltd | Other services | 2022 |
| THE Studio Cheltenham Limited | Arts & recreation | 2023 |
| THE Style House Oldham Limited | Wholesale & retail | 2014 |
| THE Surveying Practice Limited | Professional & scientific | 2003 |
| THE Sutherland Cranial College of Osteopathy Limited | Education | 2013 |
| THE Swallow Bakery Limited | Hospitality | 2001 |
| THE Target Marketing Group Holdings Limited | Professional & scientific | 1998 |
| THE Target Marketing Group Limited | Professional & scientific | 1976 |
| THE Tarsier Creative Ltd | Information & communication | 2020 |
| THE Thatch Hotel Limited | Hospitality | 2017 |
| THE Therapy Suite Albany Park Limited | Extraterritorial | 2007 |
| THE Therapy Suite Bexley Ltd | Other services | 2022 |
| THE Thirst Trap Mobile Bar Ltd | Hospitality | 2025 |
| THE Tile Barn Limited | Wholesale & retail | 1990 |
| THE Tinmen Licensing Ltd | Manufacturing | 2007 |
| THE Traditional Lime Company Limited | Extraterritorial | 1982 |
| THE Traffic Group Limited | Professional & scientific | 2000 |
| THE Two Windies Limited | Energy | 2013 |
| THE Ultimate Party Shop Limited | Wholesale & retail | 1996 |
| THE Universities and Colleges Admissions Service | Education | 1993 |
| THE University of Gloucestershire Students' Union | Other services | 2012 |
| THE Upholstery Shed Limited | Manufacturing | 1999 |
| THE Usual Place Ltd | Extraterritorial | 2015 |
| THE Valuable 500 CIC | Other services | 2021 |
| THE Valuable 500 Foundation | Education | 2021 |
| THE Venture Partnership (Investments ) Limited | Extraterritorial | 1997 |
| THE Verneys Residents Association Ltd | Households | 2013 |
| THE Vicarage GL5 Limited | Construction | 2020 |
| THE Victorian Christmas Shop Limited | Wholesale & retail | 2024 |
| THE View (Cheltenham) Management Company Limited | Households | 2016 |
| THE Village Clinic Limited | Health & social care | 2003 |
| THE Warm Welcome, White Bear Ltd | Hospitality | 2025 |
| THE Waterside Dental Clinic Ltd | Health & social care | 2018 |
| THE Waxing Room Cheltenham Ltd | Other services | 2022 |
| THE Wealth Harbour Limited | Financial services | 2011 |
| THE Whitelocks Group Limited | Financial services | 2021 |
| THE Wildings Campsite Ltd | Administrative & support | 2019 |
| THE Willow Kingston Ltd | Hospitality | 2015 |
| THE Wireless Works Cooperation Limited | Information & communication | 2014 |
| THE Women's Centre Cornwall Ltd | Health & social care | 2001 |
| THE Woof Group Limited | Other services | 2017 |
| THE Workplace Network Limited | Other services | 2018 |
| THE WOW House Company Limited | Administrative & support | 2011 |
| THE Yard Bistro Limited | Manufacturing | 2023 |
| THE4MS.COM Ltd | Professional & scientific | 2015 |
| Thebikercompany Ltd | Administrative & support | 2008 |
| Thecotswoldboutique Ltd | Wholesale & retail | 2023 |
| Thejetco Ltd | Transport & logistics | 2012 |
| Thela Limited | Professional & scientific | 2019 |
| Theo.A.A Ltd | Transport & logistics | 2025 |
| Theoc Property and Land Limited | Real estate | 2022 |
| Theoden Properties Ltd | Wholesale & retail | 2025 |
| Theorigin Consult Services Ltd | Professional & scientific | 2021 |
| Thepa Limited | Professional & scientific | 2011 |
| Thepottingshed Limited | Wholesale & retail | 2018 |
| Thequalityproducts Ltd | Wholesale & retail | 2020 |
| Therapy-With-Ben Limited | Health & social care | 2023 |
| Thermo Subsidiary UK Limited | Professional & scientific | 2024 |
| Thero Markets Limited | Financial services | 2026 |
| Think Postgrad Ltd | Information & communication | 2008 |
| Think Well Partners Ltd | Administrative & support | 2024 |
| Thinking Operations Limited | Professional & scientific | 2020 |
| Thinking Spirit Ltd | Information & communication | 2023 |
| Thinkstitute Ltd | Professional & scientific | 2020 |
| Third Generation Investments Ltd | Financial services | 2020 |
| Thirlestaine Hall (Cheltenham) Management Limited | Households | 2012 |
| Thirlestaine Hall (Cheltenham) NO. 2 Management Company Limited | Households | 2008 |
| Thirlestaine Hall Freehold Limited | Households | 2022 |
| Thirlestaine Ltd | Real estate | 2025 |
| Thirty Seven XS Limited | Administrative & support | 2011 |
| Thirty-Six Twenty-Six Limited | Professional & scientific | 2013 |
| This Echoes Big CIC | Education | 2025 |
| Thistle & BUG Creative Ltd | Information & communication | 2024 |
| THK Fitness Limited | Wholesale & retail | 2012 |
| THM Consulting Limited | Professional & scientific | 2023 |
| Thmr (Management Co.) Ltd | Professional & scientific | 2017 |
| Tholos Training Ltd | Professional & scientific | 2010 |
| Thomas Aesthetic Clinic Limited | Health & social care | 2022 |
| Thomas Bishop Limited | Wholesale & retail | 2009 |
| Thomas Crown Limited | Professional & scientific | 1994 |
| Thomas Henry Bingham Ltd | Wholesale & retail | 2024 |
| Thomas Holding Limited | Construction | 1986 |
| Thomas James Installations Ltd | Construction | 2019 |
| Thomas Periodontics Ltd | Health & social care | 2019 |
| Thomas Plant and Company Limited | Real estate | 1894 |
| Thomas Watts Investments Ltd | Financial services | 2022 |
| Thompson Close (Cheltenham) Management Limited | Households | 1999 |
| Thomson Dental Ltd | Health & social care | 2007 |
| Thomsons Plumbing & Heating Ltd | Construction | 2023 |
| Thoresby Apartments (Management) Limited | Households | 1982 |
| Thorn Holdings Limited | Financial services | 2021 |
| Thorn Homes Ltd | Construction | 2008 |
| Thornbury Belle VUE Limited | Real estate | 2024 |
| Thorncliffe Flats (Cheltenham) RTM Company Limited | Households | 2024 |