| Bewhy.- Branding and Consultancy Limited | Professional & scientific | 2025 |
| Bewley Limited | Manufacturing | 2011 |
| BEX Developments Limited | Construction | 2014 |
| Bexley Accounting Services Limited | Professional & scientific | 2026 |
| Bexley Brewery Limited | Manufacturing | 2014 |
| Bexley DRY Cleaners Ltd | Administrative & support | 2017 |
| Bexley Estates Limited | Construction | 2018 |
| Bexley Garden Centre Ltd. | Wholesale & retail | 2009 |
| Bexley Greek Taverna Limited | Hospitality | 2017 |
| Bexley Hardwoods Limited | Manufacturing | 2020 |
| Bexley Homecare Services Ltd | Health & social care | 2007 |
| Bexley Independent Living Services Limited | Health & social care | 2010 |
| Bexley Indo Spice Ltd | Hospitality | 2025 |
| Bexley Kitchen Ltd | Extraterritorial | 2017 |
| Bexley Mediterranean Ltd | Hospitality | 2024 |
| Bexley PAW Parlour Ltd | Other services | 2025 |
| Bexley S E London Restaurant Ltd | Hospitality | 2026 |
| Bexley Starters & Alternators Ltd | Wholesale & retail | 2011 |
| Bexley Therapy Rooms Limited | Health & social care | 2022 |
| Bexley Village Hotel Ltd | Hospitality | 2018 |
| Bexley Village Metals Limited | Wholesale & retail | 2016 |
| Bexleyheath Investments Limited | Real estate | 2003 |
| Bexlogistics Ltd | Transport & logistics | 2022 |
| Beyer Dynamic (G.B.) Limited | Administrative & support | 2008 |
| Beyond the Event Ltd | Administrative & support | 2024 |
| BH Networking Ltd | Professional & scientific | 2023 |
| Bhairav Properties Ltd | Real estate | 2022 |
| Bhalla Property Limited | Real estate | 2017 |
| Bicaku Plumbing & Electrical Ltd | Construction | 2022 |
| Big Creative Limited | Arts & recreation | 2024 |
| Big Goose Little Goose LLP | | 2017 |
| Biggs Construction Services Limited | Construction | 2012 |
| Birchwood Nursery Limited | Wholesale & retail | 2010 |
| Birchwood Training Solutions Limited | Professional & scientific | 2026 |
| BJ Transport & Demolition Ltd | Transport & logistics | 2025 |
| BJL Limited | Transport & logistics | 1998 |
| BKD Safety Ltd | Public administration | 2023 |
| Black Sheep Depot Limited | Construction | 2019 |
| Black Sheep Homes Limited | Real estate | 2023 |
| Blackflag Media Limited | Information & communication | 2025 |
| Blackstone Wall Properties Ltd | Real estate | 2025 |
| Blackwall Developments Limited | Construction | 2014 |
| Blaise Consultancy 100 Limited | Professional & scientific | 2014 |
| Blendon Publishing Ltd | Information & communication | 2018 |
| Blessed Day Ltd | Information & communication | 2026 |
| BLH Consultants Ltd | Professional & scientific | 2025 |
| Blockor Ltd | Information & communication | 2025 |
| Blom Social Ltd | Information & communication | 2025 |
| Bloomori Ltd | Wholesale & retail | 2025 |
| Blu.Shu Interiors Ltd | Construction | 2015 |
| Blue Haveli Interiors Ltd | Professional & scientific | 2020 |
| Blue Thinq Ltd | Information & communication | 2018 |
| Bmorris Limited | Professional & scientific | 2024 |
| BMS UK Screed Pump Sales Limited | Wholesale & retail | 2017 |
| Bobbis Hair Salon UK Limited | Other services | 2023 |
| Body Restore Clinic Limited | Health & social care | 2024 |
| Bona Fide Site Services Limited | Professional & scientific | 2002 |
| Bontoft Property Developments Ltd | Real estate | 2021 |
| Bookaboiler.Com Ltd | Construction | 2020 |
| Bookham Carpets (Surrey) Limited | Construction | 2018 |
| Boom Sport Agency Ltd | Information & communication | 2011 |
| Bordeaux-Sphere Ltd | Information & communication | 2018 |
| Bostall Skips Ltd | Water & waste | 2017 |
| Bplan Surveyors Ltd | Professional & scientific | 2020 |
| Brackstone Carpentry Ltd | Construction | 2021 |
| Brand London Ltd | Professional & scientific | 2020 |
| Breaktru Ltd. | Health & social care | 2016 |
| Breezy Socials Ltd | Professional & scientific | 2022 |
| Brendan P Byrne & Co Limited | Professional & scientific | 2008 |
| Bridgeconnectbiz Ltd | Information & communication | 2016 |
| Bright Sky Tutoring Ltd | Education | 2021 |
| Bright Sparks Commercial Limited | Construction | 2015 |
| Brighter Families Ltd | Education | 2025 |
| Brightmoon Holdings Ltd | Financial services | 2021 |
| Brightstart Tutorial Ltd | Education | 2026 |
| Brikay Property Investment Ltd | Real estate | 2025 |
| Brilliant Green Services Limited | Health & social care | 2014 |
| Brit Glazing Ltd | Construction | 2022 |
| Brit-Bangla Investment Ltd | Real estate | 2021 |
| Bromley Painting Company Ltd | Construction | 2025 |
| Bron Group Limited | Administrative & support | 2022 |
| Brother Bear Group Ltd | Administrative & support | 2022 |
| Brown Diamond Limited | Health & social care | 2015 |
| Browns Landscape and Decking Limited | Administrative & support | 2019 |
| Brunel Insurance Services Limited | Financial services | 1999 |
| Bryony Tyrrell Ltd | Arts & recreation | 2016 |
| BS Lift Services Ltd | Manufacturing | 2021 |
| BST Training Ltd | Education | 2025 |
| BTC Developments Limited | Real estate | 2016 |
| BUD and Blade Limited | Wholesale & retail | 2024 |
| Building Associates Ltd | Construction | 2000 |
| Building Progress Ltd | Professional & scientific | 2023 |
| Burney Street Management Limited | Households | 1994 |
| Business Coaching Circle Ltd | Administrative & support | 2016 |
| Business Systems Intelligence Limited | Information & communication | 2012 |
| Busy Woman.Com Events and Catering Limited | Administrative & support | 2012 |
| Buxar Properties Limited | Real estate | 2024 |
| BWI Plastering Limited | Construction | 2015 |
| Byhurst Construction Ltd | Construction | 2003 |
| C & a Construction Limited | Construction | 2013 |