| Babylon Vacations Ltd | Administrative & support | 2023 |
| Bactel Carrier Services Limited | Financial services | 1998 |
| BAD Habit Eastbourne Ltd | Information & communication | 2019 |
| BAD Habit Studios Ltd | Information & communication | 2025 |
| Baden Lodge Limited | Real estate | 2017 |
| Badger Inks Limited | Wholesale & retail | 2009 |
| Badgers Court (Eastbourne) Limited | Households | 2004 |
| Badjelly Productions UK Limited | Information & communication | 2022 |
| BAE BAE Properties Limited | Real estate | 2026 |
| Bagl Village Project, Papua New Guinea Ltd | Other services | 2023 |
| Bahloo & YHI Ltd | Manufacturing | 2026 |
| Bailiffs Direct Limited | Administrative & support | 2025 |
| Bainbridge College Ltd | Education | 2024 |
| Bairead Consulting Limited | Professional & scientific | 2008 |
| Baked N Loaded Bites Ltd | Hospitality | 2026 |
| Baker & Taylor (UK) Ltd | Wholesale & retail | 1986 |
| Baker UK Holdings Ltd | Extraterritorial | 2018 |
| Bakers 13 Ltd | Hospitality | 2026 |
| Bakers Twist 2 Limited | Wholesale & retail | 2023 |
| Bakers Twist Limited | Wholesale & retail | 2015 |
| Bakewell Solutions Ltd | Wholesale & retail | 2024 |
| Bakir Hair and Beauty Ltd | Other services | 2016 |
| Balance QS Limited | Professional & scientific | 2024 |
| Ballan Enterprises Ltd | Administrative & support | 2019 |
| Balloons R US Limited | Wholesale & retail | 2026 |
| Balneath Enterprises and Services Limited | Financial services | 2025 |
| Baltic Carpentry Ltd | Construction | 2012 |
| Bamboo Health Ltd | Professional & scientific | 2024 |
| Bamrood Limited | Health & social care | 2010 |
| Banding & Strapping Ltd | Wholesale & retail | 2021 |
| Bangash House Limited | Financial services | 2014 |
| Banger Films Ltd | Information & communication | 2026 |
| Bangers and Mash Limited | Hospitality | 2025 |
| Banjo Brown Limited | Real estate | 2019 |
| Bank on Beauty Ltd | Administrative & support | 2010 |
| Bant Trading Ltd | Education | 2025 |
| Bant Vision Ltd | Professional & scientific | 2024 |
| Banzai Sports Ltd | Wholesale & retail | 2025 |
| Baracuda Limited | Hospitality | 2018 |
| Baraka Healthcare Ltd | Public administration | 2019 |
| Barber BOY Ltd | Other services | 2026 |
| Barbuda Heights Limited | Households | 2006 |
| Barchester Place (Eastbourne) Limited | Households | 1996 |
| Barclay Leach Estates Ltd | Real estate | 2025 |
| Bardier Consulting Ltd | Professional & scientific | 2023 |
| Bardier Ltd | Real estate | 2011 |
| Barge Tiles Ltd. | Wholesale & retail | 2001 |
| Barhawk Group Ltd | Other services | 2025 |
| Barista Rocks Limited | Hospitality | 2024 |
| Barker & Lindsey Ltd | Health & social care | 2025 |
| Barl Compass Limited | Real estate | 2025 |
| Barl Holdings Limited | Financial services | 2025 |
| Barnard and Walters Limited | Other services | 1997 |
| Barnard Investment Group Limited | Real estate | 2025 |
| Barncote Project Management Limited | Construction | 2010 |
| Barnell Limited | Administrative & support | 2002 |
| Barnes HR Consultancy Ltd | Administrative & support | 2019 |
| Baroness Properties Limited | Real estate | 2020 |
| Barry Martin Agricultural & Poultry Services Limited | Agriculture & fishing | 2002 |
| Barton Properties and Investments Ltd | Real estate | 2025 |
| Bartongrove Limited | Real estate | 2022 |
| Barwells Legal Limited | Professional & scientific | 2013 |
| Basis House Ltd | Financial services | 2018 |
| Basis Insolvency Services Ltd | Professional & scientific | 2023 |
| Basket Technologies Ltd | Information & communication | 2026 |
| Basseghi Limited | Health & social care | 2015 |
| Basskoi Limited | Administrative & support | 2023 |
| BAT Vision Ltd | Wholesale & retail | 2026 |
| Batney Holdings Limited | Real estate | 2017 |
| Battle Brick Point Ltd | Construction | 2024 |
| Battle Court Limited | Households | 1964 |
| Battle Orders Limited | Wholesale & retail | 2009 |
| Battlecat Creative Ltd | Professional & scientific | 2018 |
| BAU Property Developments Ltd | Construction | 2019 |
| Bauer Dressage Ltd | Agriculture & fishing | 2010 |
| Bautech Flooring UK Ltd | Wholesale & retail | 2018 |
| Bavalia Medical Limited | Health & social care | 2025 |
| Baxter Sussex Limited | Financial services | 1999 |
| Bay Electrics Limited | Construction | 2003 |
| Bay Joinery Limited | Manufacturing | 2003 |
| Bayham Motors Limited | Wholesale & retail | 2007 |
| Bayley Industries Limited | Professional & scientific | 2025 |
| Bayside Dinner Ltd | Hospitality | 2024 |
| BB Couriers Ltd | Transport & logistics | 2011 |
| BBO Fire Ltd | Public administration | 2024 |
| BC Property Portfolio Limited | Real estate | 2015 |
| BCM Heating & Building Ltd. | Construction | 2019 |
| BCM Skin Care Ltd | Health & social care | 2022 |
| BD Wholesale and Catering Limited | Wholesale & retail | 2022 |
| BDA Services Limited | Administrative & support | 2020 |
| BDS Entrance Solutions Ltd | Construction | 2025 |
| BDS People Focus UK Ltd | Construction | 2025 |
| BE Group Holdings (UK) Limited | Professional & scientific | 2002 |
| BE Group Investments Limited | Extraterritorial | 2012 |
| BE Group Service Solutions Ltd | Information & communication | 1996 |
| BE Gymnastics C.I.C. | Education | 2020 |
| BE Valued Ltd | Extraterritorial | 2026 |
| Beach Music LLP | | 2017 |
| Beachy Head Chaplaincy Team Ltd | Other services | 2002 |
| Beachy Head Management Limited | Wholesale & retail | 2020 |