| BC Properties Essex Ltd | Construction | 2018 |
| BCL Property Portfolio Limited | Real estate | 2018 |
| BCP Lighting Limited | Other services | 1992 |
| BD Capital Group Limited | Construction | 2025 |
| BD Rail Ltd | Administrative & support | 2018 |
| BDJ Distributions Limited | Administrative & support | 2015 |
| BE Sharp Commercial Services Limited | Professional & scientific | 2018 |
| Be-Mac Scaffolding Ltd | Construction | 2013 |
| Beam IT Recruitment Ltd | Information & communication | 2020 |
| Beaubec Consulting Limited | Financial services | 2013 |
| Beaulieu Consulting Limited | Financial services | 2006 |
| Beaumont Home Care Limited | Health & social care | 2019 |
| Beautiful Bathrooms Essex Limited | Construction | 2020 |
| Beautiful Homes Ltd | Real estate | 2025 |
| Beautology Beauty Lounge Limited | Other services | 2024 |
| Beautology by Hayley Limited | Other services | 2020 |
| Beauty at the Bay Ltd | Other services | 2012 |
| Bedlam Studio Limited | Information & communication | 2020 |
| Beechdown Properties Holdings Ltd | Financial services | 2024 |
| Beechdown Properties Ltd | Real estate | 2024 |
| Befree Clothing Ltd | Wholesale & retail | 2024 |
| Began Again Ltd | Wholesale & retail | 2024 |
| Beigel Bagel Ltd | Hospitality | 2024 |
| Bekem Group Ltd | Real estate | 2025 |
| Bekem Investment Ltd | Real estate | 2017 |
| Bekem Legal Limited | Professional & scientific | 2025 |
| Bekem Properties Limited | Real estate | 2020 |
| Belgrave Developments (Essex) Limited | Real estate | 2023 |
| Bell Street Services Limited | Households | 2016 |
| Bella Ischia Ltd | Hospitality | 2023 |
| Belle Development Group Limited | Professional & scientific | 2021 |
| Bellgrove House Ltd | Arts & recreation | 2026 |
| Bellhouse Financial Services Limited | Professional & scientific | 2019 |
| Bellhouse Installations Limited | Construction | 2008 |
| Belmor Construction & Development Ltd | Construction | 2018 |
| Belstead House Limited | Real estate | 2023 |
| Belsy Limited | Real estate | 2016 |
| BEN Swift Limited Limited | Administrative & support | 2025 |
| BEN Wilson Barbers (Billericay) Limited | Other services | 2019 |
| Benami Limited | Financial services | 2004 |
| Bench Construction Ltd | Construction | 2014 |
| Bench Homes Ltd | Construction | 2025 |
| Bespoke Concrete Tables & Panels Ltd | Manufacturing | 2025 |
| Bespoke Courier Express Limited | Transport & logistics | 2011 |
| Bespoke Sales Limited | Wholesale & retail | 2016 |
| Bespoke Sporting Solutions Ltd | Professional & scientific | 2024 |
| Best Financial Group Ltd | Financial services | 2015 |
| Bestlook Essex Limited | Hospitality | 2020 |
| Beyond Clicks Ltd | Administrative & support | 2016 |
| Beyond Leads Limited | Financial services | 2020 |
| Beyond Property Limited | Real estate | 2024 |
| BGT Homes Limited | Real estate | 2023 |
| Biffin Holdings Limited | Real estate | 2004 |
| Big Blue Detailing Ltd | Wholesale & retail | 2018 |
| Big Boss Toys Ltd | Wholesale & retail | 2023 |
| Billericay Arts Association | Education | 1990 |
| Billericay Barber Shop Limited | Other services | 2000 |
| Billericay Business Improvement District Ltd | Administrative & support | 2024 |
| Billericay Community Trust | Education | 2009 |
| Billericay Construction and Flooring Ltd | Construction | 2025 |
| Billericay Construction Ltd | Construction | 2013 |
| Billericay Cosmetics Limited | Wholesale & retail | 2024 |
| Billericay Express Ltd | Hospitality | 2022 |
| Billericay Kitchen Company Ltd | Construction | 2020 |
| Billericay Lawn Tennis Club Limited | Arts & recreation | 2013 |
| Billericay Leisure Limited | Arts & recreation | 2020 |
| Billericay Mobile Mechanics Ltd | Wholesale & retail | 2025 |
| Billericay Nails Ltd | Other services | 2024 |
| Billericay News Limited | Wholesale & retail | 2024 |
| Billericay Osteopathic Practice Limited | Health & social care | 2002 |
| Billericay Padel Barn Limited | Arts & recreation | 2026 |
| Billericay Scissors Limited | Other services | 2013 |
| Billericay Self Storage Ltd. | Real estate | 2014 |
| Billericay Services Ltd | Transport & logistics | 2018 |
| Billericay Sparks Ltd | Construction | 2016 |
| Billericay Technical Solutions Ltd | Extraterritorial | 2022 |
| Billericay Town Colts Football Club Ltd | Arts & recreation | 2017 |
| Billericay Town Football Club Limited | Arts & recreation | 2001 |
| Billericay Windows Ltd | Construction | 2022 |
| Billers Local Ltd | Wholesale & retail | 2023 |
| Bilo Property Ltd | Real estate | 2026 |
| Biminster Homes Limited | Construction | 1993 |
| Biminster Homes South Limited | Construction | 2021 |
| Bioelectric Baby Limited | Health & social care | 2025 |
| Biology by Clare Limited | Education | 2023 |
| Bionics Service Centre Limited | Administrative & support | 1999 |
| Birch Haus Ltd | Information & communication | 2022 |
| Bishops Facilities Management Ltd | Water & waste | 2020 |
| Bishops Real Estate Ltd | Real estate | 2026 |
| Bizarre Trax Ltd | Information & communication | 2022 |
| BJA Repairs Ltd | Wholesale & retail | 2026 |
| BJH Holdings Ltd | Financial services | 2020 |
| BK Contracting Ltd | Construction | 2023 |
| Bkiss Ltd | Information & communication | 2021 |
| BKO Consultancy Ltd | Professional & scientific | 2018 |
| Black IVY Aesthetics Limited | Health & social care | 2022 |
| Black Shackle Rentals Limited | Administrative & support | 2019 |
| Black Shackle Rigging and Productions Limited | Manufacturing | 2015 |
| Black Square Litho Ltd | Other services | 2009 |
| Black Square Print Media Limited | Information & communication | 2012 |