| Ballantyne Grove Limited | Extraterritorial | 2015 |
| Banana Woffles Limited | Financial services | 2025 |
| Bannycom Ltd | Administrative & support | 2008 |
| Bansal Real Estate Investment Limited | Real estate | 2020 |
| Bar Hotel Rochester Limited | Hospitality | 2019 |
| Barkat Capital Ltd | Transport & logistics | 2024 |
| Barrett Property Group Ltd | Real estate | 2023 |
| Barretts (Kent) Ltd | Administrative & support | 2014 |
| Bartlett Decorators Limited | Construction | 2005 |
| Basil and Co Tankerton Ltd | Hospitality | 2023 |
| Basted Mill Ltd | Real estate | 2025 |
| Baston Ltd | Professional & scientific | 2025 |
| Bathrooms & Co Renovations Ltd | Real estate | 2024 |
| Bay Accounting Limited | Professional & scientific | 2022 |
| Bay Bike Hire Ltd | Administrative & support | 2024 |
| Bay Brickwork Ltd | Construction | 2018 |
| Bay Brothers Ltd | Hospitality | 2025 |
| Bay Consultancy and Planning Limited | Construction | 2024 |
| Bay Contour Ltd | Other services | 2021 |
| Bay Electrix Limited | Construction | 2010 |
| Bay Financial Solutions Ltd | Financial services | 2023 |
| Bay Flooring Installations Limited | Construction | 2016 |
| Bay View Consulting Limited | Professional & scientific | 2020 |
| Bay Wills Ltd | Administrative & support | 2024 |
| Baydis Limited | Wholesale & retail | 2020 |
| Bayleaf Sales Ltd | Wholesale & retail | 2025 |
| Bayliss Court Limited | Real estate | 2016 |
| Baypromoteam Limited | Arts & recreation | 2017 |
| Bayside Body Repairs Ltd | Wholesale & retail | 2017 |
| Bayside Flat Roofing Limited | Construction | 2022 |
| Bayside Tyres Limited | Wholesale & retail | 2013 |
| Bayspace Limited | Real estate | 2023 |
| Bayview Freehold Management Limited | Households | 2022 |
| BB Digital Studio Ltd | Arts & recreation | 2025 |
| BBS (Kent) Limited | Construction | 2015 |
| BCC Magic Limited | Arts & recreation | 2024 |
| Bdignam Ltd | Professional & scientific | 2023 |
| BE #Peoplesmart Ltd | Professional & scientific | 2020 |
| BEA Endeavours Ltd | Households | 2023 |
| BEA Sea Ltd | Real estate | 2023 |
| Beach Court Rentals Limited | Real estate | 2012 |
| Beach Creative Community Interest Company | Arts & recreation | 2012 |
| Beach HUT Weddings Ltd | Other services | 2018 |
| Beacon Commercial Services Ltd | Construction | 2024 |
| Beacon Court Management Company (Herne Bay) Limited | Real estate | 2001 |
| Beacon Private Hire Ltd | Transport & logistics | 2016 |
| Bean and Brunch Ltd | Hospitality | 2026 |
| Beautiful Health Ltd | Health & social care | 2021 |
| Beauty BCB Ltd | Other services | 2023 |
| Beauty Rehab Aesthetics Ltd | Other services | 2024 |
| Beauté LAB Academy Ltd | Other services | 2025 |
| Beesley Electrical Services Ltd | Construction | 2024 |
| Belle Isle Holdings Limited | Real estate | 2022 |
| Beltinge Fish Bar Ltd | Hospitality | 2016 |
| Beltinge Glazing & Repairs Ltd | Construction | 2023 |
| Belvedere Farm Management Company Limited | Households | 2007 |
| Berdon Associates Limited | Extraterritorial | 2011 |
| Bespoke Brickwork (SE) Limited | Construction | 2026 |
| Best Cleaning & Construction Limited | Construction | 2018 |
| Besy Ltd | Professional & scientific | 2020 |
| Bevtek Ltd | Other services | 2011 |
| BHT Supplies Limited | Professional & scientific | 1996 |
| Bibbymacleod Ltd | Real estate | 2026 |
| Bidtrans Ltd | Transport & logistics | 2022 |
| Big MEK Workshop Ltd | Wholesale & retail | 2022 |
| Big Mikes Smokehouse Ltd | Wholesale & retail | 2026 |
| Big Stage Productions Ltd | Arts & recreation | 2017 |
| Bishopstone Developments Ltd | Construction | 2011 |
| Bishopstowe Management Company Limited | Real estate | 2006 |
| BK 165 Station Road Ltd | Households | 2020 |
| Black Mill Homes Limited | Construction | 2023 |
| Black Sheep Barbers Kent Ltd | Other services | 2024 |
| Blackfriars Mount Ltd | Construction | 2026 |
| Blackline Detailing Ltd | Wholesale & retail | 2026 |
| Blacksteer Ltd | Information & communication | 2026 |
| Blades Properties Limited | Real estate | 2002 |
| Blake Electrics Limited | Construction | 2011 |
| Bleak House Weddings & Events Ltd | Administrative & support | 2010 |
| Blengate LLP | | 2021 |
| Blimey Marketing Partners Limited | Information & communication | 2025 |
| Blonde+Bronzed Ltd | Other services | 2020 |
| Blondie Films Limited | Information & communication | 2015 |
| Blossom Kidz Limited | Education | 2022 |
| Blue Ardor Phoenix Ltd | Information & communication | 2022 |
| Blue Diamond Estates (UK) Ltd | Real estate | 2018 |
| Blue Diamond Marketing Limited | Professional & scientific | 2014 |
| Blue Oceans Seafood UK Limited | Wholesale & retail | 2019 |
| Blue Orchid Finance Limited | Professional & scientific | 2025 |
| Blue Riband Services Limited | Professional & scientific | 1997 |
| Blue Travel Ltd | Administrative & support | 2025 |
| BMH Electrical Ltd | Construction | 2017 |
| Boabab Property Development Ltd | Construction | 2020 |
| Boestar Tyre Services Ltd | Wholesale & retail | 2020 |
| Bond Trustees and Nominees Limited | Extraterritorial | 1996 |
| Boom Property Solutions Ltd | Hospitality | 2022 |
| Borderless Ltd | Wholesale & retail | 2019 |
| Born Anxious Limited | Wholesale & retail | 2018 |
| Borough 19 Motor Club Limited | Arts & recreation | 1987 |
| Boutique Souk Partnership LLP | | 2011 |
| Brackenridge House LLP | | 2019 |