| Thandijh Ltd | Wholesale & retail | 2025 |
| Thanks Julie Ltd | Professional & scientific | 2024 |
| That'Ll DO Innovation Limited | Professional & scientific | 2019 |
| That's Crackers Ltd | Manufacturing | 2018 |
| Thatgurl Ltd | Wholesale & retail | 2025 |
| THC02 Limited | Financial services | 2021 |
| THC03 Limited | Financial services | 2021 |
| THE Accounting Bureau Limited | Professional & scientific | 2010 |
| THE Acorn Poole Limited | Hospitality | 2013 |
| THE Addiction Recovery Project Limited | Health & social care | 2023 |
| THE Adelaide Lodge Care Home Limited Liability Partnership | | 2002 |
| THE Aesthetic and Lash Lounge Ltd | Other services | 2023 |
| THE Agency England Ltd | Real estate | 2023 |
| THE Agency Real Estate England Ltd | Real estate | 2023 |
| THE Agency Real Estate Europe Ltd | Real estate | 2023 |
| THE Airventurer Ltd | Information & communication | 2020 |
| THE Alchemy Guitar Company Limited | Manufacturing | 2012 |
| THE Allens RTM Company Limited | Households | 2025 |
| THE Angel's Share Preserves LP | | 2014 |
| THE Anhexts Ltd | Wholesale & retail | 2024 |
| THE Arck Group Ltd | Financial services | 2022 |
| THE Artisan Atlas Ltd | Wholesale & retail | 2024 |
| THE Arts Poole Community Interest Company | Arts & recreation | 2008 |
| THE Arts University Bournemouth Charitable Foundation | Education | 2005 |
| THE Association for Dance Movement Psychotherapy UK Limited | Other services | 1982 |
| THE Association of Sustainability Practitioners | Professional & scientific | 2005 |
| THE Attic Ltd | Wholesale & retail | 2025 |
| THE Autonomous World CIC | Professional & scientific | 2025 |
| THE Autonomy Hotline CIC | Other services | 2022 |
| THE Autonomy Network Ltd | Other services | 2024 |
| THE Baby Academy UK Limited | Administrative & support | 2023 |
| THE Barn JIU Jitsu Ltd | Education | 2026 |
| THE Basement LDN Ltd | Arts & recreation | 2020 |
| THE Bathroom Guys (Dorset) Ltd | Construction | 2025 |
| THE Bay Hotel Lyme Regis LLP | | 2009 |
| THE Beas Houses Limited | Extraterritorial | 2004 |
| THE Beauty Centre Limited | Other services | 1995 |
| THE Beauty Run Ltd | Other services | 2016 |
| THE Bellevie London Ltd | Wholesale & retail | 2025 |
| THE Bespoke Carpentry Co Dorset Ltd | Construction | 2018 |
| THE Best Training Ltd | Information & communication | 2011 |
| THE Big Conversion Company Ltd | Construction | 2022 |
| THE Big Search Ltd | Extraterritorial | 2020 |
| THE Black Flag Collective Ltd | Wholesale & retail | 2023 |
| THE Black White BR Ltd | Wholesale & retail | 2025 |
| THE Bloomin Barista Ltd | Wholesale & retail | 2024 |
| THE Blue Rose Group Ltd | Professional & scientific | 2017 |
| THE Boat Club Ltd | Arts & recreation | 2019 |
| THE Boat Club Sales Ltd | Wholesale & retail | 2023 |
| THE Bodday Ltd | Wholesale & retail | 2020 |
| THE Bond Investment Group Ltd | Real estate | 2018 |
| THE Boscombe Park Estate Limited | Real estate | 2012 |
| THE Bourne RTM Company Limited | Households | 2020 |
| THE Bournemouth (393) RTM Company Ltd | Real estate | 2009 |
| THE Bournemouth, Dorset and Poole Care Providers Federation Limited | Health & social care | 2013 |
| THE Branch Specialist Tree & Garden Care Ltd | Administrative & support | 2026 |
| THE Breathtaking Bar Group Ltd | Hospitality | 2016 |
| THE Bridge Entertainment Limited | Information & communication | 2022 |
| THE British International Harmsworth Trophy Limited | Arts & recreation | 2024 |
| THE Broadwey Group Limited | Construction | 2015 |
| THE Brombys Management Company Limited | Households | 2013 |
| THE Broughton Property Group Ltd | Real estate | 2022 |
| THE Bubba Hub Ltd | Administrative & support | 2022 |
| THE Bucket List Book Ltd | Wholesale & retail | 2023 |
| THE Buckinghamshire Group Limited | Administrative & support | 2013 |
| THE Bullionaire Boys Club Ltd | Manufacturing | 2026 |
| THE Burning House Limited | Arts & recreation | 2025 |
| THE Cabin (Poole) Ltd | Hospitality | 2019 |
| THE Candle Shop Ltd | Financial services | 2025 |
| THE Canton Poole Ltd | Hospitality | 2021 |
| THE Capital Hippie Limited | Professional & scientific | 2024 |
| THE Cardio Clinic Limited | Health & social care | 2013 |
| THE Cardiology Clinic (Poole) Limited | Health & social care | 2021 |
| THE Career Calibrator Ltd | Wholesale & retail | 2025 |
| THE Carlton Hotel (Isle of Wight) Limited | Hospitality | 1993 |
| THE Cat PUB Co Ltd | Hospitality | 2018 |
| THE Catalist Limited | Information & communication | 2022 |
| THE Catalogue Club Limited | Administrative & support | 2002 |
| THE Catering Collective Ltd | Hospitality | 2025 |
| THE CBD Flower Shop Limited | Wholesale & retail | 2019 |
| THE Cedars (Branksome Park) Management Limited | Households | 1999 |
| THE CEO Coach Ltd | Professional & scientific | 2014 |
| THE Children's Relief Trust for Lebanon | Education | 2024 |
| THE Chilli Workshop Ltd | Wholesale & retail | 2022 |
| THE Chimneys (Warwickshire) Limited | Extraterritorial | 2010 |
| THE Chines Management Co (Poole) Ltd | Households | 2016 |
| THE Chulitos Club Ltd | Arts & recreation | 2022 |
| THE Clarens (Bournemouth) Management Company Limited | Households | 2006 |
| THE Claudia Collective Limited | Professional & scientific | 2025 |
| THE Cleaning Lads Limited | Administrative & support | 2023 |
| THE Cleaning Services Group Ltd | Administrative & support | 2008 |
| THE Cleankind Co Ltd | Wholesale & retail | 2025 |
| THE Clearance Aisle Ltd | Wholesale & retail | 2013 |
| THE Clever Kitchen Company Ltd | Manufacturing | 2019 |
| THE Clipper Restaurant Limited | Hospitality | 1970 |
| THE Clothes Doctor Limited | Other services | 2010 |
| THE CNS Collective Limited | Real estate | 2025 |
| THE Coach House & Inns Limited | Hospitality | 2015 |
| THE Coach House (Richmond) Freehold Limited | Households | 2014 |
| THE Coachbuilding Company Limited | Wholesale & retail | 2010 |