| B&O.Retail Ltd | Wholesale & retail | 2016 |
| B-Creative Design and Print Limited | Administrative & support | 2005 |
| B.B. & O (Farm Machinery) Limited | Real estate | 1972 |
| B.C. Apartments (Worthing) Limited | Households | 1978 |
| B.E.S.T Project Ltd | Health & social care | 2020 |
| B2FI Holding Ltd. | Financial services | 2024 |
| B3 Ltd | Real estate | 2022 |
| B4FINANCE Limited | Information & communication | 2021 |
| B4YOU Limited | Administrative & support | 2020 |
| Babbage Consultancy Ltd | Professional & scientific | 2021 |
| Back Lane Management Company (Essex) Limited | Households | 2013 |
| Bacon & Co (Worthing) Limited | Real estate | 2003 |
| Bacon Micawber Lettings Limited | Real estate | 2010 |
| Badlamb Limited | Information & communication | 2017 |
| Baed Ltd | Health & social care | 2020 |
| Baggi Design Limited | Professional & scientific | 2020 |
| Baggs-Ross & Ramsden Limited | Administrative & support | 2001 |
| Bagham Cross LLP | | 2024 |
| Bakeley Apartments Ltd | Real estate | 2017 |
| Bakeley Properties Ltd | Real estate | 2017 |
| Baker Kent Limited | Manufacturing | 2021 |
| Baker LDN Limited | Wholesale & retail | 2025 |
| Baker Press Limited | Manufacturing | 2003 |
| Bakerlight Limited | Information & communication | 2016 |
| Bakonyi Ltd | Construction | 2022 |
| Balakaja & AA Ltd | Wholesale & retail | 2023 |
| Balboski Limited | Information & communication | 2015 |
| Balcombe Court (Worthing) Limited | Real estate | 2009 |
| Bald Designs Ltd | Arts & recreation | 2012 |
| Baltic Classifieds Group PLC | Financial services | 2021 |
| Bambinobecky Ltd | Information & communication | 2022 |
| Banana Cabaret Limited | Arts & recreation | 1998 |
| Banana Comedy Ltd | Arts & recreation | 2013 |
| Bangla Moon Limited | Hospitality | 2026 |
| Bangor Student Houses Limited | Real estate | 2021 |
| Banstead Fruiterers Limited | Wholesale & retail | 2006 |
| Bar Orange Limited | Hospitality | 2018 |
| Bar Stool Preachers Limited | Arts & recreation | 2018 |
| Barberboy Studio Limited | Other services | 2025 |
| Barcombe Place Residents' Association Limited | Households | 1977 |
| Barcombe Wood Finish Limited | Other services | 2003 |
| Barcza Consulting Ltd | Professional & scientific | 2025 |
| Bare Bread Limited | Financial services | 2025 |
| Bare Jams Ltd | Arts & recreation | 2019 |
| Bark Accountants Limited | Professional & scientific | 2023 |
| Barker Dewson Ltd | Professional & scientific | 2007 |
| Barker Tree Surgery Ltd | Agriculture & fishing | 2022 |
| Barkers Holdings Limited | Wholesale & retail | 2011 |
| Barking Buddys Ltd | Extraterritorial | 2015 |
| Barking Dog Security Ltd | Administrative & support | 2002 |
| Barn Boarders Ltd | Other services | 2013 |
| Barn Homes Ltd | Real estate | 2025 |
| Barnard and Brough Limited | Professional & scientific | 1981 |
| Barnsnape LLP | | 2015 |
| Barrett & Monetaire Limited | Professional & scientific | 2011 |
| Barrington Interiors Ltd | Construction | 2025 |
| Barry Wincell Plumbing & Heating Limited | Construction | 2008 |
| Bartholomew Estate Agents Limited | Real estate | 2014 |
| Barton Social Care Staffing Ltd | Health & social care | 2019 |
| Base INS Brokers Ltd | Financial services | 2021 |
| Base Marketing Ltd | Professional & scientific | 2018 |
| Basement Solutions Limited | Construction | 2023 |
| Basestow Ltd | Administrative & support | 2016 |
| Basfordpowers Limited | Professional & scientific | 2020 |
| Basketball Community Builders Care Ltd | Education | 2026 |
| Baslow (Southern) Limited | Real estate | 2012 |
| Bastille Property Ltd | Real estate | 2022 |
| Bathing Belles Ltd | Extraterritorial | 2010 |
| Bathscene (Horsham) Limited | Wholesale & retail | 2016 |
| Battle Heritage Ltd | Manufacturing | 2017 |
| Batworth Park House (1-9) RTM Company Limited | Households | 2017 |
| Batworth Park House (10-13) RTM Company Limited | Households | 2017 |
| Batworth Park House (14-17) RTM Company Limited | Households | 2017 |
| Batworth Park House (18-21) RTM Company Limited | Households | 2017 |
| Baxter Brands Ltd | Wholesale & retail | 2023 |
| Bay Tree Estates Limited | Real estate | 2012 |
| Bayards Property Holdings Limited | Financial services | 2025 |
| Bayes Server Ltd | Information & communication | 2009 |
| Bayley Estates Ltd | Real estate | 2023 |
| Bayley Harrod Ltd | Professional & scientific | 2023 |
| Bayside Agile Solutions Ltd | Information & communication | 2022 |
| Baytrees Homes Limited | Health & social care | 1985 |
| BBS Property Investment Solutions Limited | Real estate | 2019 |
| BC Brothers Limited | Wholesale & retail | 2021 |
| BC Global Media Limited | Information & communication | 2020 |
| BCG Holdco Limited | Financial services | 2021 |
| BE Held Ltd | Information & communication | 2020 |
| BE Plumbing and Heating Limited | Construction | 2021 |
| BE Seen and Read Limited | Administrative & support | 2008 |
| BE Smart Supplement Shop Limited | Health & social care | 2016 |
| Beach Business Solutions Limited | Professional & scientific | 2017 |
| Beach Cafe Bognor Limited | Hospitality | 2024 |
| Beach Cafe Services Bognor Ltd | Hospitality | 2022 |
| Beach Cafe Services Goodwood Limited | Hospitality | 2024 |
| Beach Cafe Services Trad Limited | Hospitality | 2026 |
| Beach Cafe Services Trading Limited | Hospitality | 2021 |
| Beach Court (Shoreham) Management Company Limited | Households | 1971 |
| Beach House Bracks Limited | Real estate | 2026 |
| Beach House Hair Ltd | Other services | 2022 |
| Beach House Residents Association Company Limited | Households | 1987 |