| Tennis Pathway Ltd | Education | 2012 |
| Tenshi Partners LLP | | 2010 |
| Tenurepremium Property Management Limited | Households | 1995 |
| Terabooth Limited | Real estate | 2019 |
| Terra G Ltd | Administrative & support | 2025 |
| Terra Incognita Mining Ltd | Wholesale & retail | 2019 |
| Terraintech Parts Limited | Wholesale & retail | 2017 |
| Terri Judd Limited | Professional & scientific | 2016 |
| Tesla Computer Systems Limited | Professional & scientific | 1995 |
| Tessa Crowley Ltd | Professional & scientific | 2023 |
| Test Valley Building LLP | | 2005 |
| Test Valley Developments Limited | Construction | 2025 |
| Testima Aviation Consultants Limited | Professional & scientific | 2019 |
| Testskill Limited | Wholesale & retail | 2000 |
| Texal Systems Limited | Public administration | 2025 |
| Text Management (Holdings) Limited | Administrative & support | 2012 |
| Text Management Limited | Administrative & support | 2012 |
| TFC Logistics Ltd | Wholesale & retail | 2019 |
| TFL Landscapes Limited | Administrative & support | 2023 |
| Tformat Ltd | Information & communication | 2009 |
| TH Halo Ltd | Other services | 2012 |
| Th!Nk Academy Services Ltd | Professional & scientific | 2025 |
| Thacker Management Ltd | Households | 2015 |
| Thai Star Foods Ltd | Wholesale & retail | 2017 |
| Thame Park (Wenman Road) Management Company Limited | Households | 2015 |
| Thames Language & Culture Ltd. | Administrative & support | 1995 |
| Thames Valley Gritting Services Ltd | Other services | 2013 |
| Thatcham Pizza Limited | Hospitality | 2016 |
| Thatcham Swift Limited | Administrative & support | 2019 |
| Thatguyinasuit Ltd | Extraterritorial | 2019 |
| Thaxted Flats (Salisbury) Limited | Real estate | 1976 |
| THE (Downton) Borough Cafe LLP | | 2011 |
| THE 100 (Bull) Limited | Hospitality | 2026 |
| THE 100 (New Forest) Limited | Hospitality | 2023 |
| THE 100 (Stamford) Limited | Hospitality | 2023 |
| THE 100 Property Company Limited | Hospitality | 2018 |
| THE 1402 Collection Limited | Hospitality | 2024 |
| THE Academy Residents Management Company Limited | Households | 2024 |
| THE Arbour (Welford-On-Avon) Management Company Limited | Households | 2015 |
| THE Arcade Foundry Ltd | Information & communication | 2013 |
| THE Artisan Wine & Spirit Company Ltd. | Wholesale & retail | 2020 |
| THE Audio Agent Limited | Wholesale & retail | 2024 |
| THE Barber Academy Ltd | Other services | 2022 |
| THE Barber Shop (SP) Limited | Other services | 2017 |
| THE Barre BOY Ltd | Arts & recreation | 2026 |
| THE BC EYE Limited | Extraterritorial | 2024 |
| THE BCI Forum Limited | Education | 1997 |
| THE Becketts Residents Management Company Limited | Households | 1996 |
| THE Beeches (Nightingale Woods) Residents Management Company Limited | Households | 2010 |
| THE Beeches (Stanton Cross) Management Company Limited | Households | 2018 |
| THE Bespoke Brand Consultancy Limited | Extraterritorial | 2022 |
| THE Bespoke Brand Consultant Limited | Extraterritorial | 2022 |
| THE Bespoke Brand Designer Limited | Administrative & support | 2013 |
| THE Bespoke Building Company (Devon) Ltd | Construction | 2018 |
| THE Best Company Ever Ltd | Extraterritorial | 2022 |
| THE Best Ever Brownie Company Ltd | Hospitality | 2017 |
| THE Bibury Club Limited | Arts & recreation | 1991 |
| THE Bishop Wordsworth's School Foundation | Education | 2017 |
| THE Bluebells (Basingstoke) Management Company Limited | Households | 2024 |
| THE Boat Development Co Limited | Manufacturing | 2013 |
| THE Bona Fide Circle Limited | Professional & scientific | 2023 |
| THE Boudoir Beauty Boutique LLP | | 2020 |
| THE Branch Manager Ltd | Administrative & support | 2009 |
| THE Brand Edit Store Limited | Wholesale & retail | 2019 |
| THE Bread Menace Ltd | Wholesale & retail | 2026 |
| THE Bridal Corner Ltd | Wholesale & retail | 2014 |
| THE Brilliance Horse Auction Company Limited | Agriculture & fishing | 2023 |
| THE Bristol Road Transport Collection | Arts & recreation | 2004 |
| THE British Association of Nature Conservationists | Information & communication | 1987 |
| THE British Palomino Society | Other services | 1996 |
| THE Brooks (Burghfield Common) Management Company Limited | Households | 2024 |
| THE Bulldog Trust Limited | Administrative & support | 2008 |
| THE Bunga Home Ltd | Construction | 2025 |
| THE Bunker Simulator Golf Ltd | Administrative & support | 2024 |
| THE Burger Box Blandford Ltd | Hospitality | 2024 |
| THE Burlen Battery Company Limited | Extraterritorial | 2012 |
| THE Business Continuity Institute Limited | Professional & scientific | 1994 |
| THE Caledon Tyttenhanger Estate Ltd | Real estate | 2018 |
| THE Caravan Workshop Ltd | Wholesale & retail | 2025 |
| THE Card Stop TCG Ltd | Wholesale & retail | 2026 |
| THE Cargo Deck Ltd | Administrative & support | 1995 |
| THE Casevac Club Limited | Other services | 2019 |
| THE Catch Partnership Limited | Arts & recreation | 2014 |
| THE Chalk Valley Shepherds HUT Company Limited | Hospitality | 2017 |
| THE Cherwell Drive Management Company Ltd | Real estate | 2012 |
| THE Cherwell Lane Company Ltd | Real estate | 2013 |
| THE Chilli OIL Company Ltd | Manufacturing | 2012 |
| THE Chitty Food Group Limited | Manufacturing | 1986 |
| THE Choir Schools' Association Bursary Trust Limited | Professional & scientific | 2007 |
| THE Chord Company Limited | Manufacturing | 1994 |
| THE Clarendon Flock Limited | Professional & scientific | 2015 |
| THE Cleaning Clearing and Driving Company Ltd | Water & waste | 2014 |
| THE Clubhouse Limited | Other services | 2015 |
| THE Computer Centre (Salisbury) Ltd | Wholesale & retail | 2001 |
| THE Condiment Company Limited | Manufacturing | 2006 |
| THE Converged Content Company Limited | Information & communication | 2012 |
| THE Cooking School Limited | Hospitality | 2018 |
| THE Country Agent Limited | Real estate | 2020 |
| THE Country PUB Collection Limited | Hospitality | 2020 |
| THE Crescent (Andover) Limited | Real estate | 2015 |