| Bayfold Enterprises Limited | Administrative & support | 2002 |
| BBK Electrotechnical Ltd | Construction | 2022 |
| BBR Developments Ltd | Real estate | 2026 |
| BD Outsource Limited | Financial services | 2017 |
| BDE Electrical Contractors Ltd | Construction | 2014 |
| Bean Glazing Limited | Construction | 2014 |
| Beckenham and Bromley Inventories Limited | Households | 2018 |
| Beckenham and Bromley Management Limited | Households | 2018 |
| Beckenham and Bromley Property Limited | Households | 2018 |
| Beckenham and Bromley Property Management Limited | Households | 2011 |
| Bermondsey Taxi Rentals Limited | Administrative & support | 2020 |
| Bethany Lodge Management Limited | Real estate | 2025 |
| Bfbl Group Limited | Financial services | 2026 |
| Bill Ayling Limited | Extraterritorial | 2018 |
| Blackthorne Consultancy Services Ltd | Professional & scientific | 2012 |
| Blackwall Lane Limited | Real estate | 2021 |
| BLJ Electrical Services Limited | Energy | 1997 |
| Blocks, Paving & Construction Ltd | Construction | 2013 |
| Blue Capital Income Limited | Financial services | 2024 |
| Blue Panther Limited | Information & communication | 2018 |
| BOB a JOB Ltd | Administrative & support | 2019 |
| Bodrum Beta Marine Ltd | Extraterritorial | 2023 |
| Boss Carpentry Ltd | Manufacturing | 2025 |
| Boss My List Limited | Arts & recreation | 2019 |
| Boss Racing Hire Limited | Administrative & support | 2015 |
| Bostall Transport Ltd | Transport & logistics | 2017 |
| Bottle and Basket 77 Limited | Wholesale & retail | 2025 |
| Bourneby Limited | Real estate | 2011 |
| Box City (South) Ltd | Financial services | 2026 |
| Box City Group Ltd | Financial services | 2026 |
| Box City Property (Ashford) Ltd | Real estate | 2026 |
| Box City Property Ltd | Financial services | 2026 |
| BP Financial Services Ltd | Professional & scientific | 2020 |
| BP Residential Services Limited | Real estate | 2014 |
| Bradry Holding Company Ltd | Financial services | 2023 |
| Bredgar Farm Shop Limited | Wholesale & retail | 2020 |
| Bredgar Tea Room Limited | Hospitality | 2020 |
| Briah Limited | Construction | 2017 |
| Brick & Beam Ltd | Real estate | 2023 |
| Briggs Building Services Ltd | Construction | 2025 |
| Brittle Bone Ltd | Wholesale & retail | 2022 |
| Brumana Ltd | Hospitality | 2026 |
| BTL Holdings Kent Limited | Financial services | 2026 |
| Buckingham Apartments (Beckenham) Limited | Households | 2007 |
| Building Repair Maintenance Limited | Real estate | 1976 |
| Building Strategy Ltd | Professional & scientific | 2025 |
| Bullas Ltd | Financial services | 2019 |
| Burntedges Limited | Professional & scientific | 2026 |
| Burton Pynsent House Ltd | Extraterritorial | 2015 |
| Business Development (London) Limited | Administrative & support | 2004 |
| C & Z Ltd | Health & social care | 2019 |
| C.O.W.Enterprises (2025) Limited | Construction | 2025 |
| Cabeye Capital Limited | Wholesale & retail | 2002 |
| Cake Passion Ltd | Wholesale & retail | 2024 |
| Cali Living Ltd | Real estate | 2021 |
| Camberwell Green C204 Limited | Real estate | 2016 |
| Cameo Bexley Ltd | Real estate | 2018 |
| Cameo Real Estate Limited | Real estate | 2009 |
| Canela Properties Limited | Real estate | 2014 |
| Cannon&Cannon Limited | Professional & scientific | 2021 |
| Cantii Properties Ltd | Real estate | 2023 |
| Capricorn Cleaners Ltd | Other services | 2012 |
| Cargan Estates Limited | Construction | 2019 |
| Carmilla Court 263 Wickham Road Management Company Limited | Households | 2018 |
| Carrgan Holdings Ltd | Administrative & support | 2016 |
| Cascha Services Limited | Information & communication | 2015 |
| Caskfresh Ltd | Wholesale & retail | 2024 |
| Castlefield Administration Ltd | Administrative & support | 2014 |
| Catco Solutions Limited | Administrative & support | 2025 |
| Cathmar Consultancy Limited | Professional & scientific | 2008 |
| Caton Court Limited | Real estate | 2006 |
| CCS Scaffolding Kent Ltd | Extraterritorial | 2015 |
| Cdsa Consulting Limited | Professional & scientific | 2004 |
| Central Elevation Ltd | Construction | 2022 |
| Chameleon Bathrooms and Tiling Ltd | Construction | 2016 |
| Champs Bxing Limited | Wholesale & retail | 2017 |
| Chancellors Close Freehold Management Limited | Households | 2017 |
| Chancellors Close Management Limited | Households | 2015 |
| Charter Support Services Ltd | Administrative & support | 2022 |
| Chase Reeves & Co Ltd | Professional & scientific | 2003 |
| Chatback Security Limited | Extraterritorial | 2012 |
| Chillair Solutions Ltd | Energy | 2024 |
| Chinthaka's Trust Ltd | Other services | 2020 |
| Chipie Properties Ltd | Real estate | 2023 |
| Chipie Properties Two Ltd | Real estate | 2024 |
| Church Court (Kent) Management Company Limited | Households | 2022 |
| Church Fields Care Limited | Health & social care | 2026 |
| City Line Elevators Ltd | Manufacturing | 2018 |
| Civil Engineering London Ltd | Construction | 2015 |
| CJ Property Renovations Ltd | Real estate | 2024 |
| CL Accounting Solutions Ltd | Professional & scientific | 2024 |
| Clarkitecture Ltd | Professional & scientific | 2020 |
| Claystone Consulting Ltd | Professional & scientific | 2026 |
| CMD Electrics Limited | Construction | 2026 |
| Coco Creative Marketing Limited | Arts & recreation | 2016 |
| Committed HR Limited | Administrative & support | 2023 |
| Compare Your Market Ltd | Professional & scientific | 2007 |
| Compass Star Limited | Real estate | 2022 |
| Conceptgate Property Management Limited | Households | 2000 |
| Construct One Holdings Limited | Financial services | 2020 |