| Bridge Cafe Kent Ltd | Hospitality | 2026 |
| Bridge Fields (Kent) Ltd | Construction | 2024 |
| Bridgehead Fairchild Limited | Financial services | 2024 |
| Bridger Investments Limited | Financial services | 2021 |
| Bridgewell Consulting Limited | Information & communication | 2018 |
| Bridgewell Properties Ltd | Hospitality | 2023 |
| Bridgland and Bridgland C/O Limited | Information & communication | 2018 |
| Bridgland Limited | Construction | 2005 |
| Briella Limited | Health & social care | 2015 |
| Bright Ground AI Ltd | Professional & scientific | 2024 |
| Bright Path Guardians Ltd | Education | 2025 |
| Bright-On Recruitment Limited | Administrative & support | 2006 |
| Brightdoc 24 Limited | Health & social care | 2010 |
| Brighter Dawn Associates Ltd | Professional & scientific | 2022 |
| Brighter Futures Forum Limited | Information & communication | 2026 |
| Brighter Taxis Ltd | Transport & logistics | 2021 |
| Brightling & Co Accountants Ltd | Professional & scientific | 2021 |
| Brightscape Limited | Administrative & support | 2024 |
| Brightside Group Holdings Limited | Financial services | 2024 |
| Brightwise Investments Limited | Real estate | 2020 |
| Brightwise Management Limited | Real estate | 2020 |
| Brilliant Windows Ltd | Construction | 2017 |
| Brindavan Holdings Limited | Financial services | 2020 |
| Brinkfrees Limited | Wholesale & retail | 2017 |
| Brinkhart Limited | Wholesale & retail | 2014 |
| Brinklet Limited | Real estate | 2017 |
| Brisdon Ltd | Real estate | 2019 |
| Brisley Farm Management Company Limited | Households | 2018 |
| Bristol Andrology Limited | Health & social care | 2024 |
| Brite Starz Limited | Education | 2023 |
| Britinfotech Limited | Information & communication | 2013 |
| British Gurkhas Nepali Citizenship Continuation Campaign (Bgnccc-Uk/Nepal) Ltd | Health & social care | 2021 |
| British Leyland Limited | Manufacturing | 2006 |
| Britship Media Ltd | Transport & logistics | 2025 |
| BRM229 Company Limited | Other services | 2021 |
| Broadbent Wright Limited | Professional & scientific | 2024 |
| Broadcast Experts Limited | Extraterritorial | 2009 |
| Broadleaf Properties Limited | Real estate | 2018 |
| Broadoak Farm Management Company Ltd | Households | 2018 |
| Broadoak Paving Limited | Construction | 2013 |
| Broadview Estates Limited | Financial services | 2018 |
| Broadway Housing Ltd | Real estate | 2024 |
| Brochr Management Ltd | Real estate | 2025 |
| Brockwells Florist Limited | Wholesale & retail | 2007 |
| Bronshay Limited | Real estate | 1996 |
| Bronz Contracting Ltd | Administrative & support | 2014 |
| Brooke Design and Build Ltd | Construction | 2013 |
| Brooklyn Greenspa Limited | Other services | 2015 |
| Brooklyn Pink Limited | Other services | 2015 |
| Brooksden Ltd | Real estate | 2000 |
| Broom Handle Theatre Company Ltd | Arts & recreation | 2019 |
| Broomsticks Housekeeping Services Ltd | Administrative & support | 2019 |
| Broomwood Lodge Game Ltd | Agriculture & fishing | 2021 |
| Brothers Bromley Ltd | Hospitality | 2024 |
| Brothers Cafe Kent Limited | Hospitality | 2023 |
| Brothers Carpentry Ltd | Manufacturing | 2022 |
| Brown Crescent Limited | Wholesale & retail | 2024 |
| Brown Hooper Holdings Limited | Real estate | 2018 |
| Brown's Bakes and Bites Ltd | Wholesale & retail | 2022 |
| Brown's Contracting Services Ltd | Agriculture & fishing | 2023 |
| Browne & Sons Ltd | Administrative & support | 2015 |
| Browne's Scaffolding Limited | Construction | 2012 |
| Brownian Bridge Consulting Limited | Professional & scientific | 2024 |
| Browns (Accountancy and Taxation Services) Limited | Professional & scientific | 2024 |
| Brownys Plumbing and Heating Ltd | Construction | 2025 |
| Bruce K9 Ltd | Administrative & support | 2010 |
| Brufton Ltd | Information & communication | 2020 |
| Bruntwig Limited | Households | 1981 |
| Brushlikeapro Ltd | Construction | 2024 |
| Bryant Building Services Ltd | Other services | 2017 |
| Bryden Wood Environmental Engineering Limited | Construction | 2008 |
| Bryden Wood Limited | Professional & scientific | 2001 |
| Bryden Wood Technology Limited | Professional & scientific | 2006 |
| Bryony Walker Ltd | Health & social care | 2025 |
| BS Property Estates Ltd | Real estate | 2025 |
| BSK Systems Ltd | Information & communication | 2017 |
| Bstarly Prime Holdings Ltd | Financial services | 2025 |
| Btgc Limited | Professional & scientific | 2012 |
| BTL Property-Uk Holding Limited | Financial services | 2023 |
| BTL Property-Uk Limited | Real estate | 2023 |
| Btl-Uk Ltd | Manufacturing | 1994 |
| BTL101 Ltd | Real estate | 2025 |
| BTP (Kent) Limited | Construction | 2022 |
| BTR Acquisitions Ltd | Construction | 2022 |
| Btr-Trans Ltd | Transport & logistics | 2025 |
| Buable Sole Ltd | Wholesale & retail | 2022 |
| Bubble & Bathe Limited | Wholesale & retail | 2020 |
| Bubble Baby Massage Ltd | Professional & scientific | 2023 |
| Bubbles (Kent) HCW Limited | Administrative & support | 2020 |
| Buche & Co. Ltd | Real estate | 2017 |
| Buckfield Park Limited | Extraterritorial | 2000 |
| Buckingham Mews Limited | Construction | 2020 |
| Buckley Property Maintenance Limited | Construction | 2012 |
| Bucksford Law Ltd | Professional & scientific | 2018 |
| BUD Fabrications Limited | Manufacturing | 2020 |
| Buddha's Workshop Limited | Administrative & support | 2017 |
| Buddhist Community Centre Kent Ltd | Other services | 2017 |
| Buddsgroup Limited | Wholesale & retail | 1986 |
| Buddyfitonline Ltd | Wholesale & retail | 2009 |
| Buddyzone Ltd | Information & communication | 2026 |