| Bexleyheath Business Partnership Limited | Administrative & support | 2010 |
| Bexleyheath Carpentry Ltd | Construction | 2014 |
| Bexleyheath Chiropractic Clinic Limited | Health & social care | 2002 |
| Bexleyheath Golf Ltd | Arts & recreation | 2026 |
| Bexleyheath Hand Car Wash Ltd | Wholesale & retail | 2023 |
| Bexleyheath Indian Ltd | Hospitality | 2024 |
| Bexleyheath Ltd | Hospitality | 2021 |
| Bexleyheath Osteopathic Practice Ltd | Health & social care | 2014 |
| Bexleyheath Plumbers Ltd | Construction | 2014 |
| Bexleyheath Property Services Ltd | Construction | 2025 |
| Bexleyheath Station Vape Ltd | Wholesale & retail | 2024 |
| Bexlux Ltd | Real estate | 2020 |
| BEY Tout Catering Limited | Hospitality | 2021 |
| Beyond Management Consultancy Limited | Professional & scientific | 2024 |
| Beytout Limited | Wholesale & retail | 2023 |
| BH Curry Ltd | Hospitality | 2025 |
| Bhavron Limited | Information & communication | 2010 |
| Bi-Medical Imaging Ltd | Health & social care | 2020 |
| Bibek & Rubi Limited | Professional & scientific | 2017 |
| Biens 2 Investment Ltd | Real estate | 2024 |
| Big Data Analytics Solutions Ltd | Information & communication | 2014 |
| Big Deal Motor Ltd | Wholesale & retail | 2023 |
| Big Test Solutions Limited | Information & communication | 2013 |
| Black & Blue (Restaurants) Limited | Extraterritorial | 2015 |
| Black & Grey Solutions Ltd | Professional & scientific | 2025 |
| Black & White Building Services Ltd | Professional & scientific | 2024 |
| Black and Blue (a) Limited | Other services | 2008 |
| Black and Blue (B) Limited | Administrative & support | 2008 |
| Black and Blue (C) Limited | Hospitality | 2008 |
| Black and Blue (D) Limited | Administrative & support | 2009 |
| Black and Blue (E) Limited | Administrative & support | 2014 |
| Black and Blue Limited | Extraterritorial | 2015 |
| Black and Blue Waterloo Limited | Hospitality | 2012 |
| Black Hair Care Ltd | Wholesale & retail | 2026 |
| Black Law Network CIC | Education | 2025 |
| Black Room Media Limited | Information & communication | 2013 |
| Black Stag (London) Limited | Other services | 2019 |
| Black&White Enterprises Limited | Financial services | 2026 |
| Blend Bromley Limited | Hospitality | 2016 |
| Blevindon Ltd | Construction | 2023 |
| BLU Barber Ltd | Other services | 2025 |
| Blue Arrow Property Investment Ltd | Financial services | 2023 |
| Blue Badge Index CIC | Other services | 2026 |
| Blue Door Animations Ltd | Information & communication | 2025 |
| Blue Mount (UK) Limited | Administrative & support | 2016 |
| Blue Sable Company Ltd | Wholesale & retail | 2025 |
| BMS Electrical Works Limited | Construction | 2023 |
| BNH Commercial Solutions Limited | Professional & scientific | 2025 |
| BOB Froud Associates Ltd | Construction | 2020 |
| Bocris Ltd | Transport & logistics | 2024 |
| Bog-Eyed Books Limited | Information & communication | 2016 |
| Boho Mantra Ltd | Manufacturing | 2025 |
| Boiler Repair Installation and Service Ltd | Other services | 2018 |
| BON BON Books Ltd | Information & communication | 2025 |
| Bonner Bookkeeping Ltd | Professional & scientific | 2023 |
| Book in AI Ltd | Professional & scientific | 2026 |
| Borse Consultancy Services Limited | Information & communication | 2011 |
| Boston GMD Limited | Health & social care | 2012 |
| Boston-E-Griffiths Ltd | Real estate | 2019 |
| Botentia Ltd | Information & communication | 2025 |
| Bott HT Services Ltd | Transport & logistics | 2012 |
| Bournbrook Property Consultants Limited | Professional & scientific | 2025 |
| Bowler Trading Limited | Wholesale & retail | 2018 |
| Box 4 YOU Limited | Hospitality | 2018 |
| Box Strap Limited | Manufacturing | 2022 |
| BOX3EDUCATION CIC | Construction | 2022 |
| BOX3EMPOWERMENT Ltd | Information & communication | 2024 |
| Boxie Limited | Administrative & support | 2024 |
| BP CAD Services Ltd | Information & communication | 2015 |
| Bpst Ltd | Hospitality | 2020 |
| BQM Carpentry Ltd | Construction | 2021 |
| Brampton Property Solutions Limited | Hospitality | 2014 |
| Brampton Windows Limited | Construction | 1982 |
| Branch OUT Residential Services Ltd | Health & social care | 2023 |
| Branch OUT Support Services Ltd | Administrative & support | 2025 |
| Brand 360 Limited | Education | 2026 |
| Brayan Post Limited | Transport & logistics | 2024 |
| Brew House Station Limited | Hospitality | 2025 |
| Bright House Team UK Limited | Construction | 2011 |
| Bright Space Construction Ltd | Construction | 2021 |
| Brightnest Realty Limited | Real estate | 2025 |
| Brighton Road Property Ltd | Real estate | 2025 |
| Brightstar Global Consulting Limited | Real estate | 2016 |
| Brika Limited | Manufacturing | 2021 |
| Britbell Ltd | Professional & scientific | 2021 |
| Britnell & Cook Properties Ltd | Real estate | 2025 |
| Brjj Limited | Construction | 2026 |
| Broadway Kent Ltd | Construction | 2012 |
| Broadway Shopping Centre Association (Bexleyheath) Limited | Other services | 1985 |
| Broadway Shopping Centre Car Wash Ltd | Other services | 2025 |
| Brookhill Homes Ltd | Real estate | 2014 |
| Brooks Mechanical Services Limited | Construction | 2022 |
| Broughton Distribution & Co. Limited | Transport & logistics | 2026 |
| Brzee Software Solutions Ltd | Information & communication | 2024 |
| BS Fleet Services Ltd | Wholesale & retail | 2024 |
| BS Group Southeast London and Kent Ltd | Education | 2016 |
| Bsmnt Studios Ltd | Administrative & support | 2025 |
| BSP London Ltd | Construction | 2022 |
| BST Plumbing and GAS Limited | Construction | 2026 |
| Bsta Services Limited | Information & communication | 2018 |