| Bass Transport Ltd | Transport & logistics | 2026 |
| Batdink Investments Limited | Real estate | 2006 |
| Bateo Limited | Information & communication | 2018 |
| Bates Estates Ltd | Real estate | 2023 |
| Bathouse Showroom Limited | Construction | 2024 |
| Batley Haulage Ltd | Transport & logistics | 2017 |
| Battens Interiors Limited | Construction | 2021 |
| Battlesbridge Preservation Ltd | Information & communication | 2014 |
| Bawan Limited | Other services | 2015 |
| Bay View (Northam) Management Company Limited | Households | 2022 |
| Bays Scaffolding Ltd | Construction | 2015 |
| Bazic Security Limited | Administrative & support | 2017 |
| BB & Sons Ltd | Transport & logistics | 2019 |
| BC Media Essex Ltd | Information & communication | 2017 |
| BCS Specialists Ltd | Administrative & support | 2025 |
| Bcss Limited | Construction | 2016 |
| BDL Event’S Ltd | Other services | 2025 |
| BE Contracting Group Ltd | Financial services | 2022 |
| BE Safe Accounting Limited | Professional & scientific | 2021 |
| Beach Court (Management) Limited | Households | 1988 |
| Beachwood IC Ltd | Professional & scientific | 2016 |
| Beacon Connect Limited | Professional & scientific | 2025 |
| Beamridge Scaffolding Ltd | Construction | 2017 |
| Bean and BOY Ltd | Manufacturing | 2019 |
| Beaniath Limited | Wholesale & retail | 2023 |
| Beanstalk Marketing Services Ltd | Administrative & support | 2009 |
| Beanstalk Property Ltd | Real estate | 2023 |
| Bear Estate Agents Ltd | Real estate | 2014 |
| Bear Lettings Limited | Real estate | 2016 |
| Beatitude Wellbeing Limited | Other services | 2019 |
| Beattie Miller Education Limited | Education | 2026 |
| Beau Brummell Productions Limited | Professional & scientific | 2014 |
| Beau Brummell Video Productions Limited | Extraterritorial | 2026 |
| Beaumont Lounge Bar Ltd | Hospitality | 2024 |
| Beautiful Harvest Ltd | Financial services | 2021 |
| Beautiful Nails Ltd | Other services | 2025 |
| Beautiful Things Craft & Sewing Limited | Other services | 2022 |
| Beauty Space Interiors Limited | Wholesale & retail | 2024 |
| Beauty Space Worldwide Limited | Wholesale & retail | 2025 |
| Bebo Mobile & Electronics Ltd | Wholesale & retail | 2024 |
| Becky Properties Limited | Households | 2016 |
| Becky Tong Limited | Arts & recreation | 2018 |
| Beech and Laurel Residents Association Limited | Administrative & support | 1983 |
| Beecham Fisher LLP | | 2026 |
| Beechcroft Place (Chelmsford) Management Company Limited | Real estate | 2014 |
| Beecroft Apartments Management Ltd | Real estate | 2024 |
| Beijing Good Limited | Hospitality | 2022 |
| Beks Refurbishment Limited | Construction | 2022 |
| Belfairs Accommodation Ltd | Hospitality | 2023 |
| Belfairs Sports and Social Club | Arts & recreation | 1988 |
| Belfia Property Management Limited | Real estate | 2021 |
| Belgian Chip Station Ltd | Hospitality | 2019 |
| Belgian Chips Southend Ltd | Hospitality | 2024 |
| Belgravia Mansions Ltd | Real estate | 2014 |
| Believe Consulting Limited | Administrative & support | 2007 |
| Bella George Designs Limited | Wholesale & retail | 2020 |
| Belle VUE Building Contractors Limited | Construction | 2025 |
| Belli Welli (International) Limited | Manufacturing | 2020 |
| Belli Welli Limited | Manufacturing | 2020 |
| Bello Contractors Ltd | Administrative & support | 2017 |
| Bello Horizon Properties Ltd | Real estate | 2024 |
| Belton Bros.Limited | Agriculture & fishing | 1954 |
| Beluga Ventures Limited | Real estate | 2025 |
| Bench Critters Ltd | Manufacturing | 2019 |
| Benchmark Residents Limited | Households | 2003 |
| Benedetto Accounts & Tax Ltd. | Professional & scientific | 2016 |
| Benedict Care Limited | Health & social care | 2014 |
| Benfleet Skip Hire Limited | Extraterritorial | 2007 |
| Bennets Courtyard Airspace Limited | Real estate | 2022 |
| Bennett Goalkeeping & Coaching Ltd | Education | 2021 |
| Bentley's Professional Cleaning Services Ltd | Administrative & support | 2024 |
| Benwell Road Gooners Ltd | Wholesale & retail | 2026 |
| Benzo Tyres Limited | Wholesale & retail | 2026 |
| Berg Medical Services Ltd | Health & social care | 2022 |
| Berj Ecoraphs Ltd | Manufacturing | 2026 |
| Berry Financial Advice Ltd | Financial services | 2024 |
| BES & Sons Building Limited | Construction | 2016 |
| Bespoke P.A.D. Groundworks Limited | Construction | 2018 |
| Best Grill Peri Peri Ltd | Hospitality | 2026 |
| Best Pizza MAN Ltd | Hospitality | 2026 |
| Best Sports Clothing Ltd | Arts & recreation | 2021 |
| Best Techno Solution Ltd | Information & communication | 2024 |
| Best Wishes ( Essex) Ltd | Wholesale & retail | 2020 |
| Bestline Wholesale Ltd | Wholesale & retail | 2024 |
| Between the Commons Dog Walking Limited | Other services | 2026 |
| Beuley View (Peters Village) Management Company Limited | Households | 2023 |
| Bewa Studio Limited | Professional & scientific | 2020 |
| Beyondecare Ltd | Manufacturing | 2026 |
| BG Ceontea Ltd | Construction | 2022 |
| Bhaktinandan Ltd | Wholesale & retail | 2025 |
| BHM Enterainment Ltd | Manufacturing | 2023 |
| Bhuiyan Restaurant Group Limited | Hospitality | 2025 |
| Bianca Vriens Limited | Health & social care | 2018 |
| Bibi Afro Market Ltd | Wholesale & retail | 2024 |
| Bifrost Holdings Ltd | Financial services | 2023 |
| Big George Entertainment Ltd | Hospitality | 2021 |
| Big Idea Services Ltd | Wholesale & retail | 2018 |
| Big News Limited | Wholesale & retail | 2009 |
| Big Time Trading Ltd | Wholesale & retail | 2026 |
| Billericay Brewery Limited | Manufacturing | 2025 |