| BE Communications Limited | Information & communication | 2017 |
| BE Magnificent CIC | Education | 2021 |
| BE Proud Ltd | Wholesale & retail | 2025 |
| BE Smart.Co.Limited Ltd | Transport & logistics | 2014 |
| Beach House Short Film Festival Ltd | Manufacturing | 2025 |
| Beacon Media Productions Ltd | Information & communication | 2025 |
| Beacon Talent Ltd | Administrative & support | 2025 |
| Bear Strong Bar Ltd | Manufacturing | 2024 |
| Beard in the Wild Limited | Information & communication | 2025 |
| Beau and Sash Interiors Ltd | Professional & scientific | 2023 |
| Beauthletic Ltd | Manufacturing | 2026 |
| Beauty and Delicious Limited | Other services | 2023 |
| Beauty Box Therapy Limited | Other services | 2008 |
| Beauty by Nesss Limited | Other services | 2025 |
| Beautybyvickky Lounge Limited | Professional & scientific | 2023 |
| Beautynmakeup Ltd | Wholesale & retail | 2025 |
| Beaux Aires Limited | Other services | 2008 |
| Beava Limited | Information & communication | 2009 |
| Beck Scaffolding Ltd | Construction | 2024 |
| Beckett Osteopathy Ltd | Extraterritorial | 2016 |
| Beechcroft Scaffolding Limited | Construction | 2023 |
| Beechwood Drive Tenterden Limited | Households | 2024 |
| Beeillustrates Limited | Arts & recreation | 2024 |
| Beel Property Ltd | Wholesale & retail | 2021 |
| Beer & Feast Ltd | Hospitality | 2018 |
| Beer Mergers Limited | Professional & scientific | 1999 |
| Beerush Transport Ltd | Transport & logistics | 2025 |
| BEL Viso Beauty and Tanning Ltd | Other services | 2025 |
| Bell Brothers Limited | Information & communication | 2018 |
| Bell Financial Limited | Information & communication | 2025 |
| Belle Brides Limited | Wholesale & retail | 2024 |
| Bellecrest Limited | Real estate | 2026 |
| Bells Business Services Limited | Information & communication | 2022 |
| Bells Estates Limited | Real estate | 2021 |
| Belltrades Limited | Construction | 2025 |
| Belvedere Creek Management Limited | Households | 2003 |
| BEN David Properties Limited | Real estate | 2026 |
| BEN Taylor Film Limited | Professional & scientific | 2023 |
| Ben's Cider Company Limited | Wholesale & retail | 2020 |
| Ben-Olajacob UK Ltd | Construction | 2017 |
| Bencarol Ltd | Health & social care | 2018 |
| Benchmark Ideas Limited | Professional & scientific | 2012 |
| Benchmark Ideas Properties Ltd | Real estate | 2019 |
| Benedict Joy Leadership Services Limited | Professional & scientific | 2018 |
| Benevolence Care Services Limited | Health & social care | 2016 |
| Benji’S Collectables Ltd | Wholesale & retail | 2025 |
| Bennycharles Investments Limited | Administrative & support | 2012 |
| Bentletts Estate Management Company Limited | Real estate | 2019 |
| Bertem Limited | Administrative & support | 2017 |
| Besa Architectural Design Ltd | Construction | 2022 |
| Beseli Limited | Transport & logistics | 2026 |
| Bespoke Carpentry & Joinery Limited | Manufacturing | 2019 |
| Bespoke Development Solutions Ltd | Manufacturing | 2010 |
| Bespoke Developments UK Ltd | Real estate | 1999 |
| Bespoke Reno Interiors Ltd | Manufacturing | 2022 |
| Best Catch Ever Ltd | Wholesale & retail | 2021 |
| Best Pizza Morello Ltd | Hospitality | 2022 |
| Best Site Engineering Limited | Construction | 2022 |
| Best Staffing Services Ltd | Hospitality | 2024 |
| Besties Rochester Ltd | Hospitality | 2025 |
| Betacove Group Limited | Professional & scientific | 2018 |
| Betacove Limited | Construction | 1992 |
| Bethel House of EL Ltd | Health & social care | 2023 |
| Better Homes Brickwork Limited | Construction | 2025 |
| Beulah Care and Property Services Limited | Construction | 2025 |
| Beulah Haven Property Ltd | Real estate | 2025 |
| Bevs Hair Boutique Limited | Other services | 2025 |
| Bexcell Ltd | Real estate | 2019 |
| Bexley 1 Limited | Real estate | 2024 |
| Bexley Garage Limited | Wholesale & retail | 2009 |
| Bextec Electrical Services Limited | Construction | 2022 |
| Beybaba Turkish Restaurant and Bar Ltd | Hospitality | 2023 |
| BG Solution Services Ltd | Transport & logistics | 2019 |
| BGE Services Limited | Transport & logistics | 2023 |
| Bhansian & Sarai-Khas Ltd | Real estate | 2018 |
| Bhattal Property Ltd | Real estate | 2025 |
| Bianca K. Ltd | Health & social care | 2021 |
| Bibi Solano Ltd | Real estate | 2025 |
| BIC Building and Refurbishment Solution Ltd | Construction | 2019 |
| BID Property Auctions Limited | Real estate | 2025 |
| Big Blue IT Limited | Information & communication | 2005 |
| Big Day Prop Hire Ltd | Administrative & support | 2020 |
| Big Fish Public Relations Limited | Professional & scientific | 2006 |
| Big Lifting Services Ltd | Administrative & support | 2025 |
| Big Tent Media Ltd | Information & communication | 2018 |
| Big ZUM Events Ltd | Hospitality | 2024 |
| Bigee Ltd | Construction | 2025 |
| Bigmatrix Ltd | Information & communication | 2019 |
| BII Medical Limited | Health & social care | 2011 |
| Bildern Ltd | Hospitality | 2020 |
| Billinghurst Electrical Services Limited | Construction | 2021 |
| Billy Fincham Ltd | Construction | 2018 |
| Bimlogix MEP Ltd | Professional & scientific | 2022 |
| BIO Maintenance Software Ltd | Information & communication | 2025 |
| Biotrackr Pro Limited | Health & social care | 2025 |
| Birchington Parlour Ltd | Hospitality | 2013 |
| Birchlake Landscaping Limited | Administrative & support | 2023 |
| Birchwood Builds Limited | Construction | 2025 |
| Birchwood Green Building Solutions Ltd | Administrative & support | 2025 |
| Birkbeck Electrical Limited | Construction | 2009 |