| Terra-Neale Ltd | Professional & scientific | 2020 |
| Terraform Studio Ltd | Professional & scientific | 2026 |
| Terravinum Limited | Extraterritorial | 2008 |
| Terry Jones Production Buyer Ltd | Information & communication | 2009 |
| Testmade Technologies Ltd | Information & communication | 2012 |
| Texcar Audio Ltd | Wholesale & retail | 2020 |
| Textile & Technical Services Limited | Wholesale & retail | 1982 |
| Teyoes Services Ltd | Professional & scientific | 2022 |
| TFC Limited | Hospitality | 2025 |
| TFE Methods Limited | Extraterritorial | 2015 |
| TFE Productions Ltd | Information & communication | 2023 |
| Tfnl Ltd | Real estate | 2019 |
| TG Labs Ltd | Professional & scientific | 2024 |
| TGC Facility Services Ltd | Administrative & support | 2018 |
| TGC Prestige Ltd | Wholesale & retail | 2020 |
| Thab Corp Limited | Professional & scientific | 2013 |
| Thai DEE Massage Ltd | Other services | 2023 |
| Thai DOR Nails and Beauty Limited | Other services | 2022 |
| Thai Grace Therapy Ltd | Other services | 2024 |
| Thai Orchid Aylesbury Ltd | Hospitality | 2026 |
| Thai Wave Massage Limited | Other services | 2018 |
| Thailicious Street Food Limited | Hospitality | 2020 |
| Thaler Contracts Ltd | Professional & scientific | 2013 |
| Thame Care Ltd | Health & social care | 2021 |
| Thame Engineering Co Limited | Manufacturing | 1987 |
| Thame Engineering Company (Oxon) Limited(The) | Manufacturing | 1951 |
| Thame Furnishing (David Healy) Limited | Real estate | 1976 |
| Thame LEA Park Management Company (1) Limited | Households | 1977 |
| Thame Park Road Residents Association Limited | Households | 2012 |
| Thame Workholding Limited | Manufacturing | 2022 |
| Thames Valley Campers Limited | Wholesale & retail | 2020 |
| Thames Valley Flying Club Limited | Arts & recreation | 1986 |
| Thames Valley Gastroenterology Limited | Health & social care | 2010 |
| Thames Valley Protection Ltd | Administrative & support | 2024 |
| Thames Valley Technology Ltd | Information & communication | 2019 |
| Thamesfield Estates Ltd. | Real estate | 2015 |
| Thameside Fiscal Services Limited | Administrative & support | 2017 |
| Thamizh Payilagam CIC | Education | 2024 |
| That Good Hair Ltd | Wholesale & retail | 2020 |
| That Nerd Limited | Extraterritorial | 2021 |
| THE 40 Cobbold RD. Management Co. Limited | Households | 2006 |
| THE Abishai Box Ltd | Wholesale & retail | 2023 |
| THE Adams of Aylesbury Group Limited | Professional & scientific | 1992 |
| THE Adhd Money Club Ltd | Professional & scientific | 2025 |
| THE African Cultural Centre CIC | Administrative & support | 2023 |
| THE AGA Expert Ltd | Manufacturing | 2018 |
| THE Air CON Blokes Limited | Extraterritorial | 2025 |
| THE Air Conditioning Blokes Limited | Extraterritorial | 2025 |
| THE Ama-San Foundation Ltd | Health & social care | 2015 |
| THE Amobi Kitchen Ltd | Hospitality | 2025 |
| THE Anvil Alchemist Ltd | Manufacturing | 2026 |
| THE Athlete Blueprint Human Performance Ltd | Education | 2025 |
| THE Auto Gallery (Aylesbury) Limited | Wholesale & retail | 2025 |
| THE Auto Repair Hub Ltd | Wholesale & retail | 2025 |
| THE Aylesbury Business Centre Management Company Limited | Real estate | 1987 |
| THE Aylesbury Facilities Management Company Ltd | Extraterritorial | 2013 |
| THE Aylesbury Learning Partnership | Education | 2013 |
| THE Aylesbury Youth Motor Project Limited | Education | 2004 |
| THE Balloon Cabin Ltd | Wholesale & retail | 2023 |
| THE Barn Venue Ltd | Hospitality | 2022 |
| THE BEE Farmers Association Limited | Agriculture & fishing | 2012 |
| THE Best Spanish Horses Ltd | Other services | 2025 |
| THE Bliss Braiding Ltd | Other services | 2024 |
| THE Brandscout Ltd | Administrative & support | 2010 |
| THE Bricklayers Arms (Aylesbury) Limited | Hospitality | 2023 |
| THE British Parthenais Cattle Society | Agriculture & fishing | 1988 |
| THE Buckinghamshire County Museum Trust | Arts & recreation | 2012 |
| THE Buckinghamshire Grammar Schools | Education | 2013 |
| THE Buckinghamshire Performing Arts Academy Ltd | Arts & recreation | 2025 |
| THE Bucks Association for the Care of Offenders | Health & social care | 2019 |
| THE Bucks County Agricultural Association | Other services | 1990 |
| THE Bucks Goat Centre Ltd | Agriculture & fishing | 2018 |
| THE Bucks Guys Ltd | Other services | 2026 |
| THE Business Creators Limited | Information & communication | 2025 |
| THE C.M.C. Partnership Limited | Professional & scientific | 1989 |
| THE Cake Corner Limited | Professional & scientific | 2014 |
| THE Catholic Association | Other services | 1998 |
| THE CBT Collective Ltd | Health & social care | 2025 |
| THE Chameleon Lounge Ltd | Information & communication | 2018 |
| THE Chequers Inn (WT) Ltd | Hospitality | 2010 |
| THE Chiltern Brewery Company Limited | Hospitality | 2004 |
| THE Chip Co' Ltd | Hospitality | 2024 |
| THE Clare Foundation Ltd | Education | 2009 |
| THE Clean Future Renewables Limited | Construction | 2021 |
| THE Clifden Arms B&B Ltd | Hospitality | 2025 |
| THE Compassion Collective Ltd | Health & social care | 2026 |
| THE Conscious Dreamer Ltd | Wholesale & retail | 2019 |
| THE Cosmetic Repair Company (Northern) Ltd | Construction | 2014 |
| THE Country CL Limited | Arts & recreation | 2025 |
| THE Courtyards Residents (Watermead) Limited | Households | 1991 |
| THE Coven Lounge Ltd | Other services | 2003 |
| THE Cowshed Creative Ltd | Professional & scientific | 2024 |
| THE Cravit Health Group Limited | Professional & scientific | 2023 |
| THE Crescent & Villa Freehold Limited | Real estate | 2025 |
| THE Crescent (Thame) Management Company Limited | Households | 2022 |
| THE Cringle Consultancy Ltd | Professional & scientific | 2019 |
| THE Culture of Art Ltd | Wholesale & retail | 2017 |
| THE Cumberland Pencil Company Limited | Extraterritorial | 1939 |
| THE Dark Storm Goodies Ltd | Hospitality | 2026 |
| THE Decor Supply Company Limited | Wholesale & retail | 2023 |