| Aninha Shine Ltd | Real estate | 2023 |
| ANN & Ruby Property Ltd | Real estate | 2026 |
| ANN Redman Limited | Hospitality | 2008 |
| Anphi Projects Limited | Hospitality | 2012 |
| Antalya Trading Limited | Hospitality | 2023 |
| Anthony Bryan Ltd | Information & communication | 2023 |
| Anthony J W Garrod Limited | Other services | 2013 |
| Anywhere Accounting Limited | Professional & scientific | 2016 |
| AP Fire & Security Limited | Manufacturing | 2022 |
| Appletree Support Limited | Health & social care | 2007 |
| Approved Holdings Limited | Financial services | 2018 |
| Aptum Technologies (UK) Limited | Information & communication | 2009 |
| Aqueous Installations Ltd | Construction | 2022 |
| AR Heating & Plumbing Services Limited | Construction | 2024 |
| Arableintel Ltd | Information & communication | 2026 |
| ARO Design Ltd | Professional & scientific | 2024 |
| Arrendar Casa Ltd | Real estate | 2026 |
| ARS Mechanicus Limited | Professional & scientific | 2026 |
| Artisan Interior Designs Ltd | Construction | 2025 |
| Asbestosrescue Limited | Transport & logistics | 2021 |
| Ashleigh House Clinic Ltd | Health & social care | 2023 |
| Ashwood Mobility Ltd | Wholesale & retail | 2011 |
| Asiram Property Limited | Real estate | 2025 |
| Aspire Digital Group Ltd | Professional & scientific | 2023 |
| Assured GAS Safety Services Limited | Construction | 2007 |
| Aster Health Care Limited | Administrative & support | 2025 |
| AT Homez Ltd | Construction | 2024 |
| Atkinson Electrical Wholesale Limited | Wholesale & retail | 2015 |
| ATS Media Group Limited | Financial services | 2022 |
| Aura Games Limited | Information & communication | 2014 |
| Auriol Cleaning Services Limited | Construction | 2023 |
| Auriol Facilities Management Limited | Administrative & support | 2021 |
| Aurora Infusions Limited | Health & social care | 2025 |
| Aurora Installations Limited | Extraterritorial | 2024 |
| Aurum Standard Construction Ltd | Construction | 2025 |
| Auto Wheels Car Preparation Centre Limited | Professional & scientific | 2010 |
| AV Executive Cars & Chauffeurs Ltd | Transport & logistics | 2020 |
| Avenue Medispa Limited | Other services | 2003 |
| Avenue Power Limited | Construction | 2024 |
| Avocado Groundworks Services Limited | Construction | 2024 |
| Avosetta Properties Ltd | Real estate | 2022 |
| B & C Carpenters Ltd | Construction | 2005 |
| B S Care Limited | Health & social care | 1998 |
| Baileys and Sons Construction Ltd | Construction | 2018 |
| Balgarinov Consulting Limited | Professional & scientific | 2023 |
| Baltic Surgery Ltd. | Health & social care | 2014 |
| Bantr Limited | Arts & recreation | 2023 |
| Barbers on the Green Havant Ltd | Other services | 2025 |
| BASECAMP2.0 Ltd | Arts & recreation | 2025 |
| Bay Retreat Ltd | Hospitality | 2020 |
| Baybridge &Co Limited | Wholesale & retail | 2016 |
| BE 4 One Accounting Limited | Professional & scientific | 2017 |
| BE Car Smart Limited | Wholesale & retail | 2021 |
| BE My Cuppa Ltd | Wholesale & retail | 2025 |
| Beach & Creams (Purbrook) Limited | Other services | 2024 |
| Bear Whittingham Ltd | Hospitality | 2021 |
| Beautique HQ Limited | Other services | 2019 |
| Beauworth Ltd | Wholesale & retail | 2012 |
| Beck's Removals Limited | Transport & logistics | 2012 |
| Becks Removals and Storage Limited | Transport & logistics | 2026 |
| Beckwood Stays Limited | Extraterritorial | 2025 |
| Beddoe Holdings Limited | Other services | 2007 |
| Bedhampton Bros Limited | Construction | 2016 |
| Bellair Bowling and Recreation Club,Limited(The) | Arts & recreation | 1906 |
| BEN Smith Governance Solutions Limited | Professional & scientific | 2016 |
| BEN Watts Ltd | Financial services | 2020 |
| Beray Havant Ltd | Hospitality | 2018 |
| Bernay House Limited | Real estate | 2012 |
| Beside the Seaside Photography Limited | Arts & recreation | 2020 |
| Bespoke Gazebos Limited | Manufacturing | 2019 |
| Best Barbershop Limited | Other services | 2024 |
| Best One Leigh Park Limited | Wholesale & retail | 2020 |
| Best Protect Limited | Financial services | 2018 |
| Betete Lise Limited | Information & communication | 2021 |
| BH Roofing & Leadworks Ltd | Construction | 2023 |
| Bidbury Holdings Ltd | Real estate | 2024 |
| Biddable Moments Ltd | Professional & scientific | 2016 |
| Big 5 Plumbing and Heating Limited | Construction | 2026 |
| Bimshire Consultancy Limited | Information & communication | 2015 |
| Bincolet Ltd | Real estate | 2026 |
| Binksta Innovations Limited | Professional & scientific | 2021 |
| Blackwood Saunas Ltd | Construction | 2024 |
| Blenheim Court Southsea Limited | Real estate | 2017 |
| Blessedean Services (UK) Ltd | Health & social care | 2025 |
| Blimp Plumbing Ltd | Construction | 2025 |
| Blue Badge Mobility Insurance Broker Services Limited | Financial services | 2014 |
| Blue Horizon Property Management Limited | Real estate | 2008 |
| Blue Panther Management Limited | Real estate | 2002 |
| Bluestone D&C Holdings Limited | Real estate | 2009 |
| Bluestone Design & Construction Limited | Construction | 2004 |
| Bluestone Property Group Limited | Real estate | 2015 |
| Bluestone Roofing U.K. Limited | Construction | 2010 |
| Blueteq Limited | Information & communication | 2005 |
| Blueteq Trustees Limited | Other services | 2025 |
| BMD Technical Limited | Manufacturing | 2012 |
| BMS Healthcare Solutions Ltd | Administrative & support | 2024 |
| Boatie Ltd | Manufacturing | 2025 |
| Bodyguard Holdings Ltd | Financial services | 2026 |
| BODYGUARD01 Ltd | Wholesale & retail | 2004 |
| Bollscar Builders Ltd | Construction | 2019 |