| B2C Source Ltd | Wholesale & retail | 2020 |
| B2W Investment Limited | Other services | 2018 |
| B4 Electrical Contractors Limited | Construction | 2004 |
| Baas Real Estate World Limited | Real estate | 2021 |
| Baat Limited | Financial services | 2019 |
| Babies & Biceps Ltd | Other services | 2016 |
| Baby Scan Studio Ashford Limited | Health & social care | 2011 |
| Back 2 Vitality Ltd | Other services | 2022 |
| Baghera Limited | Extraterritorial | 2019 |
| Bahar & KAY Ltd | Professional & scientific | 2016 |
| Balfour Court Management Limited | Households | 1968 |
| Balstrabilt Car Hire Limited | | 1964 |
| Bandidos Mexican Restaurant Ltd | Hospitality | 2024 |
| Bar Bacchus Ltd | Hospitality | 2018 |
| Bar Skins Ltd | Extraterritorial | 2023 |
| Bar Technologies Ltd | Extraterritorial | 2013 |
| BAR39 Ltd | Hospitality | 2018 |
| Barbieri Group Ltd | Households | 2023 |
| Bare Aesthetics and Beauty Ltd | Other services | 2025 |
| Barefloors Ltd | Construction | 2015 |
| Bargrove Farm Management Company Limited | Real estate | 1994 |
| Barnes, Golbey & Farnes Ltd. | Manufacturing | 2005 |
| Bash Healthcare Services Limited | Professional & scientific | 2020 |
| Bassey Duke Ltd | Professional & scientific | 2015 |
| Baswaphon UK Limited | Wholesale & retail | 2013 |
| Bathurst Court Residents Ltd. | Professional & scientific | 2014 |
| Bay (Hythe) Management Company Limited | Households | 2015 |
| Bay Language Books Ltd | Wholesale & retail | 2005 |
| Bay View Rooms Limited | Hospitality | 2022 |
| Bayle Court (Folkestone) RTM Company Limited | Households | 2023 |
| BB to LET Limited | Real estate | 2025 |
| BC Court RTM Company Ltd | Real estate | 2024 |
| BC3R Ltd | Households | 2024 |
| BCB Development Ltd | Real estate | 2005 |
| BE a Beauty Limited | Other services | 2006 |
| BEA IT Limited | Education | 2022 |
| Beach Management Company Limited | Real estate | 2014 |
| Beachborough Park LLP | | 2024 |
| Beachborough Road Limited | Construction | 2022 |
| Beachcomb Property Solutions Ltd | Real estate | 2024 |
| Bear Cubs Limited | Wholesale & retail | 2013 |
| Bear Cubs Partnership LLP | | 2019 |
| Bear Cubs Properties Limited | Real estate | 2016 |
| Bear Studios Creative Ltd | Information & communication | 2025 |
| Bear's Essentials Skincare Limited | Wholesale & retail | 2018 |
| Bearing the Unbearable Limited | Education | 2011 |
| Bearsted Holdings Limited | Other services | 2022 |
| Beau Architecture Ltd | Professional & scientific | 2022 |
| Bebbins Limited | Hospitality | 2013 |
| Bedrock Property Group Limited | Construction | 2025 |
| Bee's Travel Ltd | Administrative & support | 2019 |
| Beech Court (Folkestone) RTM Company Ltd | Construction | 2012 |
| Beeline Behaviour Change Ltd | Health & social care | 2020 |
| Beesmart International Ltd | Information & communication | 2014 |
| Belamar Ltd | Mining & quarrying | 2022 |
| Bellavera Ltd | Other services | 2019 |
| Bellsbespokeconstruction Ltd | Construction | 2018 |
| BEN Helliwell Electrical Limited | Construction | 2014 |
| BEN James Paving Ltd | Construction | 2025 |
| Benedict Wilson Books Ltd | Wholesale & retail | 2022 |
| Benham (VF) Limited | Wholesale & retail | 2015 |
| Benjaminbrookes Ltd | Information & communication | 2019 |
| Bennetts Services Ltd | Agriculture & fishing | 2026 |
| Benny Casey Studio Ltd | Professional & scientific | 2025 |
| Benwain Builders Limited | Construction | 1996 |
| Beresfords Corporate Services Ltd | Professional & scientific | 2019 |
| Beresfords Management Services Ltd | Professional & scientific | 2024 |
| Bergwind Energy Partners Limited | Financial services | 2022 |
| Best Behaviour Lifestyle Limited | Professional & scientific | 2012 |
| Best by Design Property Solutions Limited | Real estate | 2014 |
| Best One - Black Bull Ltd | Wholesale & retail | 2006 |
| Betcollab Ltd | Professional & scientific | 2024 |
| Beton Collective CIC | Wholesale & retail | 2022 |
| Better Daughter Ltd | Arts & recreation | 2024 |
| Beyond the Hedge Limited | Information & communication | 2010 |
| BGB Carpentry & Landscapes Ltd | Manufacturing | 2024 |
| Big Bird IT Limited | Information & communication | 2021 |
| Big Whale Services Limited | Professional & scientific | 2022 |
| Bijou Belle Ltd | Manufacturing | 2025 |
| Bingle Investments Limited | Real estate | 2021 |
| Bioxcelife Limited | Wholesale & retail | 2025 |
| Birch View (Folkestone) Management Company Limited | Households | 2021 |
| Birch Works Limited | Manufacturing | 2023 |
| Bird Hide Holidays Limited | Hospitality | 2021 |
| Bishop Stays Ltd | Hospitality | 2024 |
| Bitsol Ltd | Wholesale & retail | 2024 |
| Bizboom Local Limited | Information & communication | 2017 |
| BJA Enterprises Limited | Administrative & support | 2009 |
| BKM Engineering Services Limited | Construction | 2013 |
| Black Bull Road Limited | Construction | 2017 |
| Black Electrical Solutions Limited | Construction | 2026 |
| Black Horse Densole Limited | Hospitality | 2019 |
| Blackhouse Hill Developments Ltd | Construction | 2020 |
| Blacklodge Technologies Ltd | Information & communication | 2020 |
| Blackmarket Food Ltd | Hospitality | 2023 |
| Block House Mining Ltd | Extraterritorial | 2022 |
| Block House XYZ Ltd | Extraterritorial | 2022 |
| Blockwise Block & Estate Management Limited | Real estate | 2024 |
| Blue Bridge 2 Ltd | Real estate | 2022 |
| Blue Bridge Property Group Ltd | Construction | 2018 |