| Beatswithbeet Ltd | Education | 2025 |
| Beau Tribu Limited | Other services | 2016 |
| Beaumont Gibbs Limited | Real estate | 2006 |
| Beaumont Grove Management Limited | Households | 2008 |
| Beaumont Lettings Ltd | Real estate | 1999 |
| Beautielab Beckenham Limited | Wholesale & retail | 2020 |
| Beautielab Hayes Limited | Other services | 2024 |
| Beautiful Films Global Ltd | Information & communication | 2021 |
| Beauty Academy Crystal Palace Limited | Other services | 2018 |
| Beauty Affirmations Ltd | Wholesale & retail | 2022 |
| Beauty Babe Company Ltd | Other services | 2024 |
| Beauty Box 13 Limited | Other services | 2024 |
| Beauty by Ella Limited | Extraterritorial | 2015 |
| Beauty by Ice Ltd | Other services | 2016 |
| Beauty Plump Clinic Ltd | Other services | 2024 |
| Beaverwood Club Limited | Arts & recreation | 2014 |
| Beaverwood Club Property Limited | Arts & recreation | 2026 |
| Bebe Brands Ltd | Administrative & support | 2017 |
| Beckenham and Bromley Roofing Ltd | Construction | 2011 |
| Beckenham Auto Services Limited | Manufacturing | 2022 |
| Beckenham Avenue Management Company Limited | Households | 2000 |
| Beckenham Ballet Academy Ltd | Arts & recreation | 2025 |
| Beckenham Boxing Ltd | Education | 2020 |
| Beckenham Construction Ltd | Construction | 2024 |
| Beckenham Court Management Company Limited | Households | 1964 |
| Beckenham Lane Allotments Limited | Arts & recreation | 2020 |
| Becks Consulting Ltd | Professional & scientific | 2015 |
| Becky Freeman Digital Ltd | Administrative & support | 2024 |
| Becky Laroc Beauty Ltd | Other services | 2018 |
| Becquet Developments Limited | Real estate | 2020 |
| BED Vision Ltd | Wholesale & retail | 2025 |
| Beddington BID Limited | Administrative & support | 2015 |
| Beddington Manor Freehold Limited | Households | 2013 |
| Beddington Manor Management Limited | Administrative & support | 1973 |
| Bedford Falls Management Ltd | Professional & scientific | 2016 |
| Bedrock Studio Ltd | Information & communication | 2024 |
| BEE Visible Ltd | Professional & scientific | 2022 |
| Beech Property Ltd | Real estate | 2022 |
| Beech Tree Court Management Limited | Households | 1987 |
| Beecher Court and Oakcroft Residents Limited | Households | 1992 |
| Beeches Close Management Company Limited | Households | 1989 |
| Beesown Consulting Ltd | Other services | 2012 |
| Beeto Services Limited | Administrative & support | 2012 |
| Beffay Engineering Ltd | Administrative & support | 2009 |
| Begum Business Services Ltd | Other services | 2007 |
| Behaviour Matters Ltd | Education | 2011 |
| BEJ Property Services Ltd | Wholesale & retail | 2021 |
| BEL Facilities Management Services Limited | Construction | 2026 |
| Belchev Painters Ltd | Construction | 2013 |
| Believe Perfect Cleaning Solution Ltd | Administrative & support | 2013 |
| Bella Capital Limited | Construction | 2015 |
| Bella Dental Ltd | Health & social care | 2020 |
| Bella Future Limited | Real estate | 2015 |
| Bella Property's Limited | Real estate | 2017 |
| Bellas Kitchen Ltd | Hospitality | 2026 |
| Bellcroft Land Ltd | Construction | 2026 |
| Belle VUE Property Developers Limited | Real estate | 2025 |
| Bellerby QA2 Limited | Information & communication | 2023 |
| Bellevue Court (Management) Limited | Real estate | 1983 |
| Bellmont Lodge RTM Company Limited | Households | 2021 |
| Bellrich Homes Ltd | Real estate | 2020 |
| Bells (Fish Caterers) Limited | Hospitality | 1947 |
| Bells Consultant Limited | Professional & scientific | 2014 |
| Bells of Whitechapel Ltd | Wholesale & retail | 2017 |
| Belly Bar Bromley Ltd | Other services | 2022 |
| Belm Limited | Construction | 2019 |
| Belmont Building Company Limited | Construction | 2005 |
| Belmont Investment Holdings Ltd | Financial services | 2019 |
| Belmont Property Holdings Ltd | Real estate | 2021 |
| Belvedere Consulting (UK) Ltd | Professional & scientific | 2014 |
| Belvedere Habitat Ltd | Real estate | 2019 |
| Belvedere Hall FHC Limited | Households | 2017 |
| Belvedere Pursuit Limited | Manufacturing | 2015 |
| BEN & Harry Limited | Wholesale & retail | 2020 |
| BEN Barrington-Groves Limited | Information & communication | 2010 |
| BEN Margerison Ltd | Information & communication | 2025 |
| BEN Munro Limited | Information & communication | 2011 |
| BEN Winfield Ltd | Professional & scientific | 2022 |
| Bene Esse Ltd | Health & social care | 2020 |
| Benewah Limited | Health & social care | 2019 |
| Benjamin Wilkes Limited | Professional & scientific | 2020 |
| Benjamin's Payroll Services Limited | Administrative & support | 2012 |
| Benjemax Limited | Health & social care | 2009 |
| Bennett Educational Psychology Service Ltd | Health & social care | 2015 |
| Benning Consulting Limited | Information & communication | 2011 |
| Benny Pius Limited | Health & social care | 2016 |
| Benny Pius Property Ltd | Real estate | 2026 |
| Berge Group Ltd | Professional & scientific | 2024 |
| Berisworth Limited | Real estate | 1985 |
| Berk OIL & Co Ltd | Water & waste | 2025 |
| Berkeley Court Bromley Management Company Limited | Households | 2015 |
| Berkeley Court Bromley Number 2 Management Company Limited | Households | 2015 |
| Berkeley Machinery Limited | Manufacturing | 2018 |
| Bernard P Achampong Ltd | Professional & scientific | 2023 |
| Bernies Mojo Chillie Source Limited | Manufacturing | 2013 |
| Berringers LLP | | 2018 |
| Bertex Investment Limited | Real estate | 2010 |
| Berwick House (Orpington) RTM Company Limited | Real estate | 2023 |
| Berwick Quarter Management Company Limited | Households | 2015 |
| Berwyn Professional Limited | Administrative & support | 2024 |