| Symphony Connect Ltd | Information & communication | 2015 |
| Symphony Connect Ventures Ltd | Financial services | 2021 |
| Systech (Instrumentation) Limited | Manufacturing | 1981 |
| T & J Old Town Ltd | Real estate | 2023 |
| T D Brickwork Ltd | Construction | 2025 |
| Taheny Carpentry and Joinery Limited | Manufacturing | 2018 |
| Tailored Strategy Ltd | Professional & scientific | 2018 |
| Taliaz Ltd | Health & social care | 2025 |
| Tall Chin Limited | Arts & recreation | 2019 |
| Tallini Locum Services Limited | Professional & scientific | 2024 |
| Talon Design Limited | Wholesale & retail | 2021 |
| Tanwood School Ltd | Administrative & support | 2016 |
| Tanwood Youth Theatre Ltd | Administrative & support | 2016 |
| Tarrant Refrigeration & Air Conditioning Limited | Construction | 2001 |
| TCH Consultancy Ltd | Professional & scientific | 2024 |
| Tdist Ltd | Information & communication | 2006 |
| Tea and Tonic Trading Company Ltd | Wholesale & retail | 2022 |
| Team Racing Ltd | Arts & recreation | 2024 |
| Tekanda Properties Ltd | Administrative & support | 2021 |
| Telemac Ltd | Construction | 2025 |
| Teletech Investments Ltd | Financial services | 2004 |
| TEN Jeudwine Ltd | Professional & scientific | 2026 |
| Tenma Ltd | Other services | 2016 |
| Terrace View Café Ltd | Hospitality | 2022 |
| Teslamall Limited | Manufacturing | 2005 |
| Thames Valley Ventures Limited | Financial services | 1982 |
| THE Alan Liddiard Forge Limited | Manufacturing | 2012 |
| THE Art of Balance Limited | Hospitality | 2004 |
| THE Behaviour Clinic Limited | Other services | 2012 |
| THE Bespoke Wardrobe Studio Ltd | Manufacturing | 2025 |
| THE Blanchard Partnership Limited | Real estate | 2025 |
| THE Bronze Loft Ltd | Other services | 2026 |
| THE Closet Entrepreneur Ltd | Arts & recreation | 2024 |
| THE Compeater Ltd | Administrative & support | 2016 |
| THE Corner Cabinet Newspaper Ltd | Information & communication | 2023 |
| THE Cornish Masonry Stove Company Ltd | Manufacturing | 2011 |
| THE Cotswold Therapist Ltd | Health & social care | 2021 |
| THE Crafty Sheep Limited | Wholesale & retail | 2018 |
| THE Crossbar Exeter Limited | Hospitality | 2015 |
| THE Dodson Group Ltd | Professional & scientific | 2022 |
| THE DUE Process Consultancy Ltd | Professional & scientific | 2020 |
| THE Exceptional Travel Company Limited | Administrative & support | 2009 |
| THE Finishing Touch Limited | Wholesale & retail | 1989 |
| THE Funding Bridge Limited | Professional & scientific | 2025 |
| THE Gallery RTM Company Ltd | Households | 2012 |
| THE Giving Coach Company Limited | Other services | 2025 |
| THE Good Skin Club Limited | Administrative & support | 2016 |
| THE Gwennili Trust | Health & social care | 1995 |
| THE Happiness Horsebox Community Interest Company | Other services | 2020 |
| THE Happy Hormone Co Ltd | Wholesale & retail | 2025 |
| THE Henge Shop Limited | Wholesale & retail | 2006 |
| THE Herd Street Management Company Limited | Health & social care | 1991 |
| THE Home Stylist Ltd | Professional & scientific | 2019 |
| THE Hops Westbury Ltd | Households | 2024 |
| THE Hyperion Foundation | Extraterritorial | 2024 |
| THE Lodge Avebury Limited | Hospitality | 2026 |
| THE Loyalty People Limited | Professional & scientific | 2018 |
| THE Marlborough Bike Company Ltd | Wholesale & retail | 2017 |
| THE Motor Garage Limited | Real estate | 2013 |
| THE Niblett Whellams Partnership Limited | Professional & scientific | 2005 |
| THE Nurtured Brain Limited | Health & social care | 2021 |
| THE Old Stables Dunfield Ltd | Hospitality | 2023 |
| THE Positive Press Media Limited | Information & communication | 2025 |
| THE Ramsbury Brewing and Distilling Company Limited | Manufacturing | 2013 |
| THE Ramsbury Manor Foundation | Arts & recreation | 2017 |
| THE Roscoe Group Ltd | Real estate | 2020 |
| THE Salt and Pepper Mill Co Ltd | Manufacturing | 1998 |
| THE Sandleford Partnership LLP | | 2011 |
| THE Schoolhouse Ltd | Hospitality | 2023 |
| THE Spaceworks Company Limited | Real estate | 2006 |
| THE Studio Ramsbury Ltd | Arts & recreation | 2024 |
| THE TAP Marlborough Limited | Hospitality | 2022 |
| THE Turkish JOB Barbers Ltd | Other services | 2019 |
| THE Wellbuilding Company Limited | Real estate | 2019 |
| THE Wooden Treehouse Company Ltd. | Real estate | 2016 |
| Theax Technology Limited | Professional & scientific | 2024 |
| Thego Associates Ltd | Information & communication | 2014 |
| Theobald Property Services Limited | Real estate | 2022 |
| Thermohome Ltd | Construction | 2020 |
| Thinking Matters Holdings Limited | Education | 2011 |
| THIRTY8 Entertainment Limited | Hospitality | 2015 |
| This IS Valour Limited | Manufacturing | 2025 |
| Thomas MAE (Southwest) Limited | Professional & scientific | 2018 |
| Thomas MAE Group Limited | Financial services | 2018 |
| Thomas MAE Land and Planning Limited | Real estate | 2018 |
| Thomas MAE Limited | Real estate | 2011 |
| Thomas MAE LNH (Eastern) Limited | Real estate | 2022 |
| Thomas MAE LNH (Midlands) Limited | Real estate | 2020 |
| Thompson's G&G Ltd | Administrative & support | 2023 |
| Thorpe Partners Ltd | Information & communication | 2023 |
| Three Counties Farms Limited | Agriculture & fishing | 2004 |
| Thump Festival Limited | Administrative & support | 2025 |
| Thusanish Private Limited | Wholesale & retail | 2016 |
| Tidcombe Farming Limited | Agriculture & fishing | 2011 |
| Tierra Madre Foods Ltd | Wholesale & retail | 2026 |
| Tiltman Family Holdings Ltd | Real estate | 2017 |
| Tiltman Family Partnership LLP | | 2017 |
| TIM Knight Fencing Ltd | Administrative & support | 2010 |
| Timefinders Ltd. | Health & social care | 2014 |
| TIN Horse Design Ltd. | Professional & scientific | 1990 |